diff --git a/CMakeLists.txt b/CMakeLists.txt
index d455acb..61eec6d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -17,7 +17,7 @@
 # under the License.
 #
 
-cmake_minimum_required(VERSION 3.7)
+cmake_minimum_required(VERSION 3.11)
 cmake_policy(SET CMP0065 OLD) # default export policy, required for self-dlopen
 
 project(nifi-minifi-cpp)
@@ -87,6 +87,10 @@
 list(APPEND STRICT_GSL_CHECKS_Values AUDIT ON DEBUG_ONLY OFF)
 set_property(CACHE STRICT_GSL_CHECKS PROPERTY STRINGS ${STRICT_GSL_CHECKS_Values})
 
+if (WIN32)
+	option(MSI_REDISTRIBUTE_UCRT_NONASL "Redistribute Universal C Runtime DLLs with the MSI generated by CPack. The resulting MSI is not distributable under Apache 2.0." OFF)
+endif()
+
 # Use ccache if present
 find_program(CCACHE_FOUND ccache)
 if(CCACHE_FOUND)
@@ -114,27 +118,8 @@
 # Enable usage of the VERSION specifier
 include(CheckCXXCompilerFlag)
 if (WIN32)
-    add_compile_definitions(WIN32_LEAN_AND_MEAN _CRT_SECURE_NO_WARNINGS)
+    add_compile_definitions(WIN32_LEAN_AND_MEAN _CRT_SECURE_NO_WARNINGS NOMINMAX)
     add_compile_options(/W3 /utf-8)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -DNOMINMAX")
-	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -DNOMINMAX")
-  if ((MSVC_VERSION GREATER "1900") OR (MSVC_VERSION EQUAL "1900"))
-	CHECK_CXX_COMPILER_FLAG("/std:c++14" _cpp_latest_flag_supported)
-	if (_cpp_latest_flag_supported)
-		add_compile_options("/std:c++14")
-	endif()
-  endif()
-else()
-CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
-CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
-if(COMPILER_SUPPORTS_CXX11)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")
-elseif(COMPILER_SUPPORTS_CXX0X)
-	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++0x")
-else()
- message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
-endif()
-
 endif()
 
 if (WIN32)
@@ -153,7 +138,12 @@
 	endif()
 endif()
 
-set(CMAKE_CXX_STANDARD 11)
+if (WIN32)
+	set(CMAKE_CXX_STANDARD 14)
+	set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /std:c++14")
+else()
+	set(CMAKE_CXX_STANDARD 11)
+endif()
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
 # thread library - we must find this before we set ASAN flags, otherwise FindThreads.cmake sometimes thinks we don't
@@ -213,6 +203,9 @@
 		-DCMAKE_FIND_ROOT_PATH_MODE_LIBRARY=${CMAKE_FIND_ROOT_PATH_MODE_LIBRARY}
 		-DCMAKE_FIND_ROOT_PATH_MODE_INCLUDE=${CMAKE_FIND_ROOT_PATH_MODE_INCLUDE}
 		-DCMAKE_INSTALL_PREFIX=${CMAKE_INSTALL_PREFIX}
+		-DCOMPILE_DEFINITIONS=${COMPILE_DEFINITIONS}
+		-DCMAKE_CXX_STANDARD=${CMAKE_CXX_STANDARD}
+		-DCMAKE_CXX_STANDARD_REQUIRED=${CMAKE_CXX_STANDARD_REQUIRED}
 		-G${CMAKE_GENERATOR}
 		)
 
@@ -321,6 +314,9 @@
 add_library(optional-lite INTERFACE)
 target_include_directories(optional-lite INTERFACE "${CMAKE_CURRENT_SOURCE_DIR}/thirdparty/optional-lite-3.2.0/include")
 
+# date
+include(Date)
+
 #### Extensions ####
 SET(TEST_DIR ${CMAKE_SOURCE_DIR}/libminifi/test)
 include(Extensions)
@@ -648,11 +644,17 @@
 		message("Using redist directory: ${VCRUNTIME_REDIST_DIR}")
 	endif()
 
-	set(UCRT_DIR_NAT "$ENV{WindowsSdkDir}Redist\\ucrt\\DLLs\\$ENV{Platform}")
-	file(TO_CMAKE_PATH "${UCRT_DIR_NAT}" UCRT_DIR)
-	message("Using UCRT from ${UCRT_DIR}")
-	file(GLOB UCRT_DLLS "${UCRT_DIR}/*.dll")
-	file(COPY ${UCRT_DLLS} DESTINATION "${CMAKE_CURRENT_BINARY_DIR}/redist")
+	if (MSI_REDISTRIBUTE_UCRT_NONASL)
+		set(UCRT_DIR_NAT "$ENV{WindowsSdkDir}Redist\\ucrt\\DLLs\\$ENV{Platform}")
+		file(TO_CMAKE_PATH "${UCRT_DIR_NAT}" UCRT_DIR)
+		message("Using UCRT from ${UCRT_DIR}")
+		file(GLOB UCRT_DLLS "${UCRT_DIR}/*.dll")
+		file(COPY ${UCRT_DLLS} DESTINATION "${CMAKE_CURRENT_BINARY_DIR}/ucrt")
+		install(DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/ucrt/"
+			DESTINATION bin
+			COMPONENT bin
+		)
+	endif()
 
 	if (INSTALLER_MERGE_MODULES)
 		message("Creating installer with merge modules")
@@ -668,11 +670,11 @@
 		if(CMAKE_SIZEOF_VOID_P EQUAL 8)
 			message("Using ${VCRUNTIME_X64_MERGEMODULE_PATH} VC Redistributable Merge Module")
 			configure_file("msi/x64.wsi" "msi/x64.wsi" @ONLY)
-			set(CPACK_WIX_EXTRA_SOURCES "${CMAKE_CURRENT_BINARY_DIR}/msi/x64.wsi")
+			list(APPEND CPACK_WIX_EXTRA_SOURCES "${CMAKE_CURRENT_BINARY_DIR}/msi/x64.wsi")
 		elseif(CMAKE_SIZEOF_VOID_P EQUAL 4)
 			message("Using ${VCRUNTIME_X86_MERGEMODULE_PATH} VC Redistributable Merge Module")
 			configure_file("msi/x86.wsi" "msi/x86.wsi" @ONLY)
-			set(CPACK_WIX_EXTRA_SOURCES "${CMAKE_CURRENT_BINARY_DIR}/msi/x86.wsi")
+			list(APPEND CPACK_WIX_EXTRA_SOURCES "${CMAKE_CURRENT_BINARY_DIR}/msi/x86.wsi")
 		else()
 			message(FATAL_ERROR "Could not determine architecture, CMAKE_SIZEOF_VOID_P is unexpected: ${CMAKE_SIZEOF_VOID_P}")
 		endif()
@@ -779,7 +781,11 @@
 set(CPACK_ARCHIVE_COMPONENT_INSTALL ON)
 set(CPACK_RDKAFKA_COMPONENT_INSTALL ON)
 set(CPACK_MQTT_COMPONENT_INSTALL ON)
-set(CPACK_COMPONENTS_ALL bin conf minifijni)
+if(WIN32)
+	set(CPACK_COMPONENTS_ALL bin conf minifijni tzdata)
+else()
+	set(CPACK_COMPONENTS_ALL bin conf minifijni)
+endif()
 
 
 include(CPack)
diff --git a/LICENSE b/LICENSE
index a2e2a71..0f30eab 100644
--- a/LICENSE
+++ b/LICENSE
@@ -2954,3 +2954,7 @@
 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+--------------------------------------------------------------------------
+
+This product bundles the IANA timezone database which is in the public domain.
diff --git a/NOTICE b/NOTICE
index a162b6a..a0a980a 100644
--- a/NOTICE
+++ b/NOTICE
@@ -53,6 +53,20 @@
 - gsl-lite - Copyright (c) 2015 Martin Moene and Copyright (c) 2015 Microsoft Corporation. All rights reserved.
 - optional-lite - Copyright (c) 2015-2018 Martin Moene under the Boost Software License
 - libsodium - Copyright (c) 2013 - 2018 Frank Denis under the ISC software license
+- IANA timezone database - public domain
+- date (HowardHinnant/date) - notices below
 
 The licenses for these third party components are included in LICENSE.txt
 
+Copyright notices of the date project:
+// Copyright (c) 2015, 2016, 2017 Howard Hinnant
+// Copyright (c) 2015 Ville Voutilainen
+// Copyright (c) 2016, 2017, 2019 Jiangang Zhuang
+// Copyright (c) 2016 Adrian Colomitchi
+// Copyright (c) 2016 Alexander Kormanovsky
+// Copyright (c) 2017 Aaron Bishop
+// Copyright (c) 2017 Florian Dang
+// Copyright (c) 2017 Nicolas Veloz Savino
+// Copyright (c) 2017 Paul Thompson
+// Copyright (c) 2017, 2018, 2019 Tomasz Kamiński
+// Copyright (c) 2019 Asad. Gharighi
diff --git a/aptitude.sh b/aptitude.sh
index 289dbfe..c474b29 100644
--- a/aptitude.sh
+++ b/aptitude.sh
@@ -25,12 +25,12 @@
     CMAKE_BUILD_COMMAND="${CMAKE_BUILD_COMMAND} -DFAIL_ON_WARNINGS= "
 }
 bootstrap_cmake(){
-    ## on Ubuntu 16.04 we need a more recent CMake
-    if [[ "$OS" = Ubuntu* && "$VER" = "16.04" ]]; then
+    ## on Ubuntu install the latest CMake
+    if [[ "$OS" = Ubuntu* ]]; then
       echo "Adding KitWare CMake apt repository..."
       sudo apt-get update && sudo apt-get install -y apt-transport-https ca-certificates gnupg software-properties-common wget
       wget -O - https://apt.kitware.com/keys/kitware-archive-latest.asc 2>/dev/null | sudo apt-key add -
-      sudo apt-add-repository 'deb https://apt.kitware.com/ubuntu/ xenial main' && sudo apt-get update
+      sudo apt-add-repository "deb https://apt.kitware.com/ubuntu/ $(lsb_release -c --short) main" && sudo apt-get update
     fi
     sudo apt-get -y install cmake
 }
diff --git a/cmake/Date.cmake b/cmake/Date.cmake
new file mode 100644
index 0000000..80d25d0
--- /dev/null
+++ b/cmake/Date.cmake
@@ -0,0 +1,82 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+
+include(FetchContent)
+
+if (WIN32)
+    # tzdata and windowsZones.xml from unicode cldr-common are required to be installed for date-tz operation on Windows
+    FetchContent_Declare(tzdata
+        URL         https://data.iana.org/time-zones/releases/tzdata2020e.tar.gz
+        URL_HASH    SHA256=0be1ba329eae29ae1b54057c3547b3e672f73b3ae7643aa87dac85122bec037e
+    )
+    FetchContent_GetProperties(tzdata)
+    if (NOT tzdata_POPULATED)
+        FetchContent_Populate(tzdata)
+    endif()
+
+    install(DIRECTORY ${tzdata_SOURCE_DIR}/
+        DESTINATION tzdata
+        COMPONENT tzdata
+    )
+
+    FetchContent_Declare(cldr_common
+        URL         https://unicode.org/Public/cldr/38.1/cldr-common-38.1.zip
+        URL_HASH    SHA512=3d641921c82c15b6257791229ed20db391675089927959869a5d96b17e7d0c3ad9063faf21151766eafe8ff7b85a98b37b9608f4c4f1d3f6f2b8e5565725db03
+    )
+    FetchContent_GetProperties(cldr_common)
+    if (NOT cldr_common_POPULATED)
+        FetchContent_Populate(cldr_common)
+    endif()
+
+    install(FILES ${cldr_common_SOURCE_DIR}/common/supplemental/windowsZones.xml
+        DESTINATION tzdata
+        COMPONENT tzdata
+    )
+endif()
+
+FetchContent_Declare(date_src
+    GIT_REPOSITORY https://github.com/HowardHinnant/date.git
+    GIT_TAG        v3.0.0  # adjust tag/branch/commit as needed
+)
+FetchContent_GetProperties(date_src)
+if (NOT date_src_POPULATED)
+    FetchContent_Populate(date_src)
+    set(DATE_INCLUDE_DIR 
+        $<BUILD_INTERFACE:${date_src_SOURCE_DIR}/include>
+        $<INSTALL_INTERFACE:include>
+    )
+    add_library(date INTERFACE)
+    add_library(date::date ALIAS date)
+    target_sources(date INTERFACE ${DATE_INCLUDE_DIR}/date/date.h)
+    target_include_directories(date INTERFACE ${DATE_INCLUDE_DIR})
+    target_compile_features(date INTERFACE cxx_std_11)
+
+    add_library(date-tz STATIC ${date_src_SOURCE_DIR}/src/tz.cpp)
+    add_library(date::tz ALIAS date-tz)
+    target_include_directories(date-tz PUBLIC ${DATE_INCLUDE_DIR})
+    target_compile_features(date-tz PUBLIC cxx_std_11)
+    target_compile_definitions(date-tz PRIVATE AUTO_DOWNLOAD=0 HAS_REMOTE_API=0)
+    if (WIN32)
+        target_compile_definitions(date-tz PRIVATE INSTALL=. PUBLIC USE_OS_TZDB=0)
+    else()
+        target_compile_definitions(date-tz PUBLIC USE_OS_TZDB=1)
+    endif()
+    if (NOT MSVC)
+        find_package(Threads)
+        target_link_libraries(date-tz PUBLIC Threads::Threads)
+    endif()
+endif()
diff --git a/extensions/expression-language/CMakeLists.txt b/extensions/expression-language/CMakeLists.txt
index f70f779..9343964 100644
--- a/extensions/expression-language/CMakeLists.txt
+++ b/extensions/expression-language/CMakeLists.txt
@@ -17,109 +17,84 @@
 # under the License.
 #
 if(WIN32)
-
 	include(FetchContent)
 
 	set(BASE_DIR "${CMAKE_CURRENT_BINARY_DIR}")
 
 	FetchContent_Declare(
-			winflexbison
-			GIT_REPOSITORY "https://github.com/lexxmark/winflexbison.git"
-			GIT_TAG "a72f3d6b5102b65f064a5054ba634d3d62e94f41" 
-		  )
+		winflexbison
+		GIT_REPOSITORY "https://github.com/lexxmark/winflexbison.git"
+		GIT_TAG "a72f3d6b5102b65f064a5054ba634d3d62e94f41" 
+	)
 	FetchContent_GetProperties("winflexbison")
 
 	if(NOT winflexbison_POPULATED)
-	  FetchContent_Populate("winflexbison")
-	  execute_process(
+		FetchContent_Populate("winflexbison")
+		execute_process(
 			COMMAND ${CMAKE_COMMAND} .
 			WORKING_DIRECTORY ${winflexbison_SOURCE_DIR}
 			RESULT_VARIABLE result
 			OUTPUT_VARIABLE bisonbuild 
 			ERROR_VARIABLE bisonbuildE
-		)
+			)
 
-	  execute_process(
+		execute_process(
 			COMMAND ${CMAKE_COMMAND} --build . --config RelWithDebInfo  
 			WORKING_DIRECTORY ${winflexbison_SOURCE_DIR}
 			RESULT_VARIABLE result
 			OUTPUT_VARIABLE bisonbuild 
 			ERROR_VARIABLE bisonbuildE
-		)
+			)
 
-	  file(COPY ${winflexbison_SOURCE_DIR}/bison/Data DESTINATION ${winflexbison_SOURCE_DIR}/bison/RelWithDebInfo/)
-
+		file(COPY ${winflexbison_SOURCE_DIR}/bison/Data DESTINATION ${winflexbison_SOURCE_DIR}/bison/RelWithDebInfo/)
 	endif()
  
 	set(BISON_EXECUTABLE "${winflexbison_SOURCE_DIR}/bison/RelWithDebInfo/win_bison.exe" CACHE PATH "bison executable")
-	
 	set(FLEX_EXECUTABLE "${winflexbison_SOURCE_DIR}/flex/RelWithDebInfo/win_flex.exe" CACHE PATH "flex executable")
 	
 	include_directories(${winflexbison_SOURCE_DIR}/flex/src/)
 
 	list(APPEND CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/cmake/winflexbison")
-
-	find_package(BISON REQUIRED)
-	find_package(FLEX REQUIRED)
-
-	bison_target(
-        el-parser
-        ${CMAKE_CURRENT_SOURCE_DIR}/Parser.yy
-        ${CMAKE_CURRENT_SOURCE_DIR}/Parser.cpp
-	)
-
-	flex_target(
-			el-scanner
-			${CMAKE_CURRENT_SOURCE_DIR}/Scanner.ll
-			${CMAKE_CURRENT_SOURCE_DIR}/Scanner.cpp
-	)
-
-	add_flex_bison_dependency(el-scanner el-parser)
-
-else()
-
+endif()
 
 find_package(BISON REQUIRED)
 find_package(FLEX REQUIRED)
 
 bison_target(
-        el-parser
-        ${CMAKE_CURRENT_SOURCE_DIR}/Parser.yy
-        ${CMAKE_CURRENT_SOURCE_DIR}/Parser.cpp
+	el-parser
+	${CMAKE_CURRENT_SOURCE_DIR}/Parser.yy
+	${CMAKE_CURRENT_SOURCE_DIR}/Parser.cpp
 )
 
 flex_target(
-        el-scanner
-        ${CMAKE_CURRENT_SOURCE_DIR}/Scanner.ll
-        ${CMAKE_CURRENT_SOURCE_DIR}/Scanner.cpp
+	el-scanner
+	${CMAKE_CURRENT_SOURCE_DIR}/Scanner.ll
+	${CMAKE_CURRENT_SOURCE_DIR}/Scanner.cpp
 )
 
 add_flex_bison_dependency(el-scanner el-parser)
-endif()
+
 include_directories(./ ../../libminifi/include  ../../libminifi/include/core ../../thirdparty/)
 include_directories(common)
 include_directories(impl)
-include_directories(../../thirdparty/date/include)
 
 if(WIN32)
-include_directories(../../libminifi/opsys/win)
-set(SOCKET_SOURCES "src/io/win/*.cpp")
+	include_directories(../../libminifi/opsys/win)
+	set(SOCKET_SOURCES "src/io/win/*.cpp")
 else()
-include_directories(../../libminifi/opsys/posix)
-set(SOCKET_SOURCES "src/io/posix/*.cpp")
+	include_directories(../../libminifi/opsys/posix)
+	set(SOCKET_SOURCES "src/io/posix/*.cpp")
 endif()
 
 
-add_subdirectory(../../thirdparty/date ${CMAKE_CURRENT_BINARY_DIR}/date)
-
 file(GLOB SOURCES  "*.cpp")
 
 add_library(minifi-expression-language-extensions STATIC ${SOURCES} ${BISON_el-parser_OUTPUTS} ${FLEX_el-scanner_OUTPUTS})
 set_property(TARGET minifi-expression-language-extensions PROPERTY POSITION_INDEPENDENT_CODE ON)
 
 target_link_libraries(minifi-expression-language-extensions ${LIBMINIFI})
-target_link_libraries(minifi-expression-language-extensions tz RapidJSON CURL::libcurl)
+target_link_libraries(minifi-expression-language-extensions date::tz RapidJSON CURL::libcurl)
 
 SET (EXPRESSION-LANGUAGE-EXTENSIONS minifi-expression-language-extensions PARENT_SCOPE)
 
-register_extension(minifi-expression-language-extensions)
\ No newline at end of file
+register_extension(minifi-expression-language-extensions)
diff --git a/extensions/expression-language/impl/expression/Expression.h b/extensions/expression-language/impl/expression/Expression.h
index 62069ec..c1057ec 100644
--- a/extensions/expression-language/impl/expression/Expression.h
+++ b/extensions/expression-language/impl/expression/Expression.h
@@ -28,7 +28,7 @@
 #define EXPRESSION_LANGUAGE_USE_DATE
 
 // Disable date in EL for incompatible compilers
-#if defined(WIN32) || __GNUC__ < 5
+#if !defined(WIN32) && __GNUC__ < 5
 #undef EXPRESSION_LANGUAGE_USE_DATE
 #endif
 
diff --git a/extensions/windows-event-log/CollectorInitiatedSubscription.cpp b/extensions/windows-event-log/CollectorInitiatedSubscription.cpp
index 55f741c..54f6933 100644
--- a/extensions/windows-event-log/CollectorInitiatedSubscription.cpp
+++ b/extensions/windows-event-log/CollectorInitiatedSubscription.cpp
@@ -647,7 +647,10 @@
   while (renderedXMLs_.try_dequeue(xml)) {
     auto flowFile = session->create();
 
-    session->write(flowFile, &WriteCallback(xml));
+    {
+      WriteCallback wc{ xml };
+      session->write(flowFile, &wc);
+    }
     session->putAttribute(flowFile, core::SpecialFlowAttribute::MIME_TYPE, "application/xml");
     session->getProvenanceReporter()->receive(flowFile, provenanceUri_, getUUIDStr(), "Consume windows event logs", 0);
     session->transfer(flowFile, s_success);
diff --git a/extensions/windows-event-log/ConsumeWindowsEventLog.cpp b/extensions/windows-event-log/ConsumeWindowsEventLog.cpp
index aee9cf8..e3b6ae9 100644
--- a/extensions/windows-event-log/ConsumeWindowsEventLog.cpp
+++ b/extensions/windows-event-log/ConsumeWindowsEventLog.cpp
@@ -662,7 +662,10 @@
     auto flowFile = session.create();
     logger_->log_trace("Writing rendered XML to a flow file");
 
-    session.write(flowFile, &WriteCallback(eventRender.text_));
+    {
+      WriteCallback wc{ eventRender.text_ };
+      session.write(flowFile, &wc);
+    }
     for (const auto &fieldMapping : eventRender.matched_fields_) {
       if (!fieldMapping.second.empty()) {
         session.putAttribute(flowFile, fieldMapping.first, fieldMapping.second);
@@ -679,7 +682,10 @@
     auto flowFile = session.create();
     logger_->log_trace("Writing rendered plain text to a flow file");
 
-    session.write(flowFile, &WriteCallback(eventRender.rendered_text_));
+    {
+      WriteCallback wc{ eventRender.rendered_text_ };
+      session.write(flowFile, &wc);
+    }
     session.putAttribute(flowFile, core::SpecialFlowAttribute::MIME_TYPE, "text/plain");
     session.putAttribute(flowFile, "Timezone name", timezone_name_);
     session.putAttribute(flowFile, "Timezone offset", timezone_offset_);
diff --git a/extensions/windows-event-log/TailEventLog.h b/extensions/windows-event-log/TailEventLog.h
index 53b98db..4865326 100644
--- a/extensions/windows-event-log/TailEventLog.h
+++ b/extensions/windows-event-log/TailEventLog.h
@@ -32,8 +32,8 @@
 namespace processors {
 
 #define MAX_RECORD_BUFFER_SIZE 0x10000  // 64k
-const LPWSTR pEventTypeNames[] = { L"Error", L"Warning", L"Informational", L"Audit Success", L"Audit Failure" };
-char log_name[255] = "Application";
+const LPCWSTR pEventTypeNames[] = { L"Error", L"Warning", L"Informational", L"Audit Success", L"Audit Failure" };
+const char log_name[255] = "Application";
 
 class TailEventLog : public core::Processor {
 public:
diff --git a/msi/WixWin.wsi b/msi/WixWin.wsi
index 336e020..fbac160 100644
--- a/msi/WixWin.wsi
+++ b/msi/WixWin.wsi
@@ -324,48 +324,6 @@
                 <File Id="MiNiFiExe_msvcp140_2" Name="msvcp140_2.dll" KeyPath="no" Source="redist\msvcp140_2.dll"/>
                 <File Id="MiNiFiExe_vccorlib140" Name="vccorlib140.dll" KeyPath="no" Source="redist\vccorlib140.dll"/>
                 <File Id="MiNiFiExe_vcruntime140" Name="vcruntime140.dll" KeyPath="no" Source="redist\vcruntime140.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_console_l1_1_0.dll" Name="api-ms-win-core-console-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-console-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_console_l1_2_0.dll" Name="api-ms-win-core-console-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-console-l1-2-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_datetime_l1_1_0.dll" Name="api-ms-win-core-datetime-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-datetime-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_debug_l1_1_0.dll" Name="api-ms-win-core-debug-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-debug-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_errorhandling_l1_1_0.dll" Name="api-ms-win-core-errorhandling-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-errorhandling-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_file_l1_1_0.dll" Name="api-ms-win-core-file-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_file_l1_2_0.dll" Name="api-ms-win-core-file-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l1-2-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_file_l2_1_0.dll" Name="api-ms-win-core-file-l2-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l2-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_handle_l1_1_0.dll" Name="api-ms-win-core-handle-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-handle-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_heap_l1_1_0.dll" Name="api-ms-win-core-heap-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-heap-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_interlocked_l1_1_0.dll" Name="api-ms-win-core-interlocked-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-interlocked-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_libraryloader_l1_1_0.dll" Name="api-ms-win-core-libraryloader-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-libraryloader-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_localization_l1_2_0.dll" Name="api-ms-win-core-localization-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-localization-l1-2-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_memory_l1_1_0.dll" Name="api-ms-win-core-memory-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-memory-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_namedpipe_l1_1_0.dll" Name="api-ms-win-core-namedpipe-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-namedpipe-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_processenvironment_l1_1_0.dll" Name="api-ms-win-core-processenvironment-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-processenvironment-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_processthreads_l1_1_0.dll" Name="api-ms-win-core-processthreads-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-processthreads-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_processthreads_l1_1_1.dll" Name="api-ms-win-core-processthreads-l1-1-1.dll" KeyPath="no" Source="redist\api-ms-win-core-processthreads-l1-1-1.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_profile_l1_1_0.dll" Name="api-ms-win-core-profile-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-profile-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_rtlsupport_l1_1_0.dll" Name="api-ms-win-core-rtlsupport-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-rtlsupport-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_string_l1_1_0.dll" Name="api-ms-win-core-string-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-string-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_synch_l1_1_0.dll" Name="api-ms-win-core-synch-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-synch-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_synch_l1_2_0.dll" Name="api-ms-win-core-synch-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-synch-l1-2-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_sysinfo_l1_1_0.dll" Name="api-ms-win-core-sysinfo-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-sysinfo-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_timezone_l1_1_0.dll" Name="api-ms-win-core-timezone-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-timezone-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_util_l1_1_0.dll" Name="api-ms-win-core-util-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-util-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_conio_l1_1_0.dll" Name="api-ms-win-crt-conio-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-conio-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_convert_l1_1_0.dll" Name="api-ms-win-crt-convert-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-convert-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_environment_l1_1_0.dll" Name="api-ms-win-crt-environment-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-environment-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_filesystem_l1_1_0.dll" Name="api-ms-win-crt-filesystem-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-filesystem-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_heap_l1_1_0.dll" Name="api-ms-win-crt-heap-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-heap-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_locale_l1_1_0.dll" Name="api-ms-win-crt-locale-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-locale-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_math_l1_1_0.dll" Name="api-ms-win-crt-math-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-math-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_multibyte_l1_1_0.dll" Name="api-ms-win-crt-multibyte-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-multibyte-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_private_l1_1_0.dll" Name="api-ms-win-crt-private-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-private-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_process_l1_1_0.dll" Name="api-ms-win-crt-process-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-process-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_runtime_l1_1_0.dll" Name="api-ms-win-crt-runtime-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-runtime-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_stdio_l1_1_0.dll" Name="api-ms-win-crt-stdio-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-stdio-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_string_l1_1_0.dll" Name="api-ms-win-crt-string-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-string-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_time_l1_1_0.dll" Name="api-ms-win-crt-time-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-time-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_utility_l1_1_0.dll" Name="api-ms-win-crt-utility-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-utility-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_ucrtbase.dll" Name="ucrtbase.dll" KeyPath="no" Source="redist\ucrtbase.dll"/>
                 <!--
                 It is not possible to set 'ServiceConfig' for 2 'Component' (error LGHT0130 : The primary key 'Apache NiFi MiNiFi' is duplicated in table 'ServiceConfig').
                 Problem is described: http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/Installing-a-Service-with-Varying-Dependencies-td693097.html
@@ -410,48 +368,6 @@
                 <File Id="MiNiFiExeWithPassword_msvcp140_2" Name="msvcp140_2.dll" KeyPath="no" Source="redist\msvcp140_2.dll"/>
                 <File Id="MiNiFiExeWithPassword_vccorlib140" Name="vccorlib140.dll" KeyPath="no" Source="redist\vccorlib140.dll"/>
                 <File Id="MiNiFiExeWithPassword_vcruntime140" Name="vcruntime140.dll" KeyPath="no" Source="redist\vcruntime140.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_console_l1_1_0.dll" Name="api-ms-win-core-console-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-console-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_console_l1_2_0.dll" Name="api-ms-win-core-console-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-console-l1-2-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_datetime_l1_1_0.dll" Name="api-ms-win-core-datetime-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-datetime-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_debug_l1_1_0.dll" Name="api-ms-win-core-debug-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-debug-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_errorhandling_l1_1_0.dll" Name="api-ms-win-core-errorhandling-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-errorhandling-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_file_l1_1_0.dll" Name="api-ms-win-core-file-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_file_l1_2_0.dll" Name="api-ms-win-core-file-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l1-2-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_file_l2_1_0.dll" Name="api-ms-win-core-file-l2-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l2-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_handle_l1_1_0.dll" Name="api-ms-win-core-handle-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-handle-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_heap_l1_1_0.dll" Name="api-ms-win-core-heap-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-heap-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_interlocked_l1_1_0.dll" Name="api-ms-win-core-interlocked-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-interlocked-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_libraryloader_l1_1_0.dll" Name="api-ms-win-core-libraryloader-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-libraryloader-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_localization_l1_2_0.dll" Name="api-ms-win-core-localization-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-localization-l1-2-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_memory_l1_1_0.dll" Name="api-ms-win-core-memory-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-memory-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_namedpipe_l1_1_0.dll" Name="api-ms-win-core-namedpipe-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-namedpipe-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_processenvironment_l1_1_0.dll" Name="api-ms-win-core-processenvironment-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-processenvironment-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_processthreads_l1_1_0.dll" Name="api-ms-win-core-processthreads-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-processthreads-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_processthreads_l1_1_1.dll" Name="api-ms-win-core-processthreads-l1-1-1.dll" KeyPath="no" Source="redist\api-ms-win-core-processthreads-l1-1-1.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_profile_l1_1_0.dll" Name="api-ms-win-core-profile-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-profile-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_rtlsupport_l1_1_0.dll" Name="api-ms-win-core-rtlsupport-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-rtlsupport-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_string_l1_1_0.dll" Name="api-ms-win-core-string-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-string-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_synch_l1_1_0.dll" Name="api-ms-win-core-synch-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-synch-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_synch_l1_2_0.dll" Name="api-ms-win-core-synch-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-synch-l1-2-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_sysinfo_l1_1_0.dll" Name="api-ms-win-core-sysinfo-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-sysinfo-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_timezone_l1_1_0.dll" Name="api-ms-win-core-timezone-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-timezone-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_util_l1_1_0.dll" Name="api-ms-win-core-util-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-util-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_conio_l1_1_0.dll" Name="api-ms-win-crt-conio-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-conio-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_convert_l1_1_0.dll" Name="api-ms-win-crt-convert-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-convert-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_environment_l1_1_0.dll" Name="api-ms-win-crt-environment-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-environment-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_filesystem_l1_1_0.dll" Name="api-ms-win-crt-filesystem-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-filesystem-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_heap_l1_1_0.dll" Name="api-ms-win-crt-heap-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-heap-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_locale_l1_1_0.dll" Name="api-ms-win-crt-locale-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-locale-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_math_l1_1_0.dll" Name="api-ms-win-crt-math-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-math-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_multibyte_l1_1_0.dll" Name="api-ms-win-crt-multibyte-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-multibyte-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_private_l1_1_0.dll" Name="api-ms-win-crt-private-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-private-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_process_l1_1_0.dll" Name="api-ms-win-crt-process-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-process-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_runtime_l1_1_0.dll" Name="api-ms-win-crt-runtime-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-runtime-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_stdio_l1_1_0.dll" Name="api-ms-win-crt-stdio-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-stdio-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_string_l1_1_0.dll" Name="api-ms-win-crt-string-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-string-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_time_l1_1_0.dll" Name="api-ms-win-crt-time-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-time-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_utility_l1_1_0.dll" Name="api-ms-win-crt-utility-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-utility-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_ucrtbase.dll" Name="ucrtbase.dll" KeyPath="no" Source="redist\ucrtbase.dll"/>
                 <ServiceInstall Id="MiNiFiExeServiceWithPassword"
                                 Type="ownProcess"
                                 Vital="yes"
diff --git a/msi/WixWinMergeModules.wsi b/msi/WixWinMergeModules.wsi
index b293acc..539d3b6 100644
--- a/msi/WixWinMergeModules.wsi
+++ b/msi/WixWinMergeModules.wsi
@@ -325,48 +325,6 @@
                          Name="minifi.exe"
                          KeyPath="yes"
                          Source="main\minifi.exe"/>
-                <File Id="MiNiFiExe_api_ms_win_core_console_l1_1_0.dll" Name="api-ms-win-core-console-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-console-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_console_l1_2_0.dll" Name="api-ms-win-core-console-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-console-l1-2-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_datetime_l1_1_0.dll" Name="api-ms-win-core-datetime-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-datetime-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_debug_l1_1_0.dll" Name="api-ms-win-core-debug-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-debug-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_errorhandling_l1_1_0.dll" Name="api-ms-win-core-errorhandling-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-errorhandling-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_file_l1_1_0.dll" Name="api-ms-win-core-file-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_file_l1_2_0.dll" Name="api-ms-win-core-file-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l1-2-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_file_l2_1_0.dll" Name="api-ms-win-core-file-l2-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l2-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_handle_l1_1_0.dll" Name="api-ms-win-core-handle-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-handle-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_heap_l1_1_0.dll" Name="api-ms-win-core-heap-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-heap-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_interlocked_l1_1_0.dll" Name="api-ms-win-core-interlocked-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-interlocked-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_libraryloader_l1_1_0.dll" Name="api-ms-win-core-libraryloader-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-libraryloader-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_localization_l1_2_0.dll" Name="api-ms-win-core-localization-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-localization-l1-2-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_memory_l1_1_0.dll" Name="api-ms-win-core-memory-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-memory-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_namedpipe_l1_1_0.dll" Name="api-ms-win-core-namedpipe-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-namedpipe-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_processenvironment_l1_1_0.dll" Name="api-ms-win-core-processenvironment-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-processenvironment-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_processthreads_l1_1_0.dll" Name="api-ms-win-core-processthreads-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-processthreads-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_processthreads_l1_1_1.dll" Name="api-ms-win-core-processthreads-l1-1-1.dll" KeyPath="no" Source="redist\api-ms-win-core-processthreads-l1-1-1.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_profile_l1_1_0.dll" Name="api-ms-win-core-profile-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-profile-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_rtlsupport_l1_1_0.dll" Name="api-ms-win-core-rtlsupport-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-rtlsupport-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_string_l1_1_0.dll" Name="api-ms-win-core-string-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-string-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_synch_l1_1_0.dll" Name="api-ms-win-core-synch-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-synch-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_synch_l1_2_0.dll" Name="api-ms-win-core-synch-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-synch-l1-2-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_sysinfo_l1_1_0.dll" Name="api-ms-win-core-sysinfo-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-sysinfo-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_timezone_l1_1_0.dll" Name="api-ms-win-core-timezone-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-timezone-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_core_util_l1_1_0.dll" Name="api-ms-win-core-util-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-util-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_conio_l1_1_0.dll" Name="api-ms-win-crt-conio-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-conio-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_convert_l1_1_0.dll" Name="api-ms-win-crt-convert-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-convert-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_environment_l1_1_0.dll" Name="api-ms-win-crt-environment-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-environment-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_filesystem_l1_1_0.dll" Name="api-ms-win-crt-filesystem-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-filesystem-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_heap_l1_1_0.dll" Name="api-ms-win-crt-heap-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-heap-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_locale_l1_1_0.dll" Name="api-ms-win-crt-locale-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-locale-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_math_l1_1_0.dll" Name="api-ms-win-crt-math-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-math-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_multibyte_l1_1_0.dll" Name="api-ms-win-crt-multibyte-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-multibyte-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_private_l1_1_0.dll" Name="api-ms-win-crt-private-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-private-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_process_l1_1_0.dll" Name="api-ms-win-crt-process-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-process-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_runtime_l1_1_0.dll" Name="api-ms-win-crt-runtime-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-runtime-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_stdio_l1_1_0.dll" Name="api-ms-win-crt-stdio-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-stdio-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_string_l1_1_0.dll" Name="api-ms-win-crt-string-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-string-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_time_l1_1_0.dll" Name="api-ms-win-crt-time-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-time-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_api_ms_win_crt_utility_l1_1_0.dll" Name="api-ms-win-crt-utility-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-utility-l1-1-0.dll"/>
-                <File Id="MiNiFiExe_ucrtbase.dll" Name="ucrtbase.dll" KeyPath="no" Source="redist\ucrtbase.dll"/>
                 <!--
                 It is not possible to set 'ServiceConfig' for 2 'Component' (error LGHT0130 : The primary key 'Apache NiFi MiNiFi' is duplicated in table 'ServiceConfig').
                 Problem is described: http://windows-installer-xml-wix-toolset.687559.n2.nabble.com/Installing-a-Service-with-Varying-Dependencies-td693097.html
@@ -408,48 +366,6 @@
                          Name="minifi.exe"
                          KeyPath="yes"
                          Source="main\minifi.exe"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_console_l1_1_0.dll" Name="api-ms-win-core-console-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-console-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_console_l1_2_0.dll" Name="api-ms-win-core-console-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-console-l1-2-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_datetime_l1_1_0.dll" Name="api-ms-win-core-datetime-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-datetime-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_debug_l1_1_0.dll" Name="api-ms-win-core-debug-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-debug-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_errorhandling_l1_1_0.dll" Name="api-ms-win-core-errorhandling-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-errorhandling-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_file_l1_1_0.dll" Name="api-ms-win-core-file-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_file_l1_2_0.dll" Name="api-ms-win-core-file-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l1-2-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_file_l2_1_0.dll" Name="api-ms-win-core-file-l2-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-file-l2-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_handle_l1_1_0.dll" Name="api-ms-win-core-handle-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-handle-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_heap_l1_1_0.dll" Name="api-ms-win-core-heap-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-heap-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_interlocked_l1_1_0.dll" Name="api-ms-win-core-interlocked-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-interlocked-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_libraryloader_l1_1_0.dll" Name="api-ms-win-core-libraryloader-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-libraryloader-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_localization_l1_2_0.dll" Name="api-ms-win-core-localization-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-localization-l1-2-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_memory_l1_1_0.dll" Name="api-ms-win-core-memory-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-memory-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_namedpipe_l1_1_0.dll" Name="api-ms-win-core-namedpipe-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-namedpipe-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_processenvironment_l1_1_0.dll" Name="api-ms-win-core-processenvironment-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-processenvironment-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_processthreads_l1_1_0.dll" Name="api-ms-win-core-processthreads-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-processthreads-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_processthreads_l1_1_1.dll" Name="api-ms-win-core-processthreads-l1-1-1.dll" KeyPath="no" Source="redist\api-ms-win-core-processthreads-l1-1-1.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_profile_l1_1_0.dll" Name="api-ms-win-core-profile-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-profile-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_rtlsupport_l1_1_0.dll" Name="api-ms-win-core-rtlsupport-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-rtlsupport-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_string_l1_1_0.dll" Name="api-ms-win-core-string-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-string-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_synch_l1_1_0.dll" Name="api-ms-win-core-synch-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-synch-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_synch_l1_2_0.dll" Name="api-ms-win-core-synch-l1-2-0.dll" KeyPath="no" Source="redist\api-ms-win-core-synch-l1-2-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_sysinfo_l1_1_0.dll" Name="api-ms-win-core-sysinfo-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-sysinfo-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_timezone_l1_1_0.dll" Name="api-ms-win-core-timezone-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-timezone-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_core_util_l1_1_0.dll" Name="api-ms-win-core-util-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-core-util-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_conio_l1_1_0.dll" Name="api-ms-win-crt-conio-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-conio-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_convert_l1_1_0.dll" Name="api-ms-win-crt-convert-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-convert-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_environment_l1_1_0.dll" Name="api-ms-win-crt-environment-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-environment-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_filesystem_l1_1_0.dll" Name="api-ms-win-crt-filesystem-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-filesystem-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_heap_l1_1_0.dll" Name="api-ms-win-crt-heap-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-heap-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_locale_l1_1_0.dll" Name="api-ms-win-crt-locale-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-locale-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_math_l1_1_0.dll" Name="api-ms-win-crt-math-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-math-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_multibyte_l1_1_0.dll" Name="api-ms-win-crt-multibyte-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-multibyte-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_private_l1_1_0.dll" Name="api-ms-win-crt-private-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-private-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_process_l1_1_0.dll" Name="api-ms-win-crt-process-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-process-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_runtime_l1_1_0.dll" Name="api-ms-win-crt-runtime-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-runtime-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_stdio_l1_1_0.dll" Name="api-ms-win-crt-stdio-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-stdio-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_string_l1_1_0.dll" Name="api-ms-win-crt-string-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-string-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_time_l1_1_0.dll" Name="api-ms-win-crt-time-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-time-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_api_ms_win_crt_utility_l1_1_0.dll" Name="api-ms-win-crt-utility-l1-1-0.dll" KeyPath="no" Source="redist\api-ms-win-crt-utility-l1-1-0.dll"/>
-                <File Id="MiNiFiExeWithPassword_ucrtbase.dll" Name="ucrtbase.dll" KeyPath="no" Source="redist\ucrtbase.dll"/>
                 <ServiceInstall Id="MiNiFiExeServiceWithPassword"
                                 Type="ownProcess"
                                 Vital="yes"
diff --git a/thirdparty/date/.gitignore b/thirdparty/date/.gitignore
deleted file mode 100644
index e88e3be..0000000
--- a/thirdparty/date/.gitignore
+++ /dev/null
@@ -1,194 +0,0 @@
-#ignore thumbnails created by windows
-Thumbs.db
-#Ignore files build by Visual Studio
-*.obj
-*.exe
-*.pdb
-*.user
-*.aps
-*.pch
-*.vspscc
-*_i.c
-*_p.c
-*.ncb
-*.suo
-*.tlb
-*.tlh
-*.bak
-*.cache
-*.ilk
-*.log
-[Bb]in
-[Dd]ebug*/
-*.lib
-*.sbr
-obj/
-[Rr]elease*/
-_ReSharper*/
-[Tt]est[Rr]esult*
-.idea/
-*.opensdf
-## Ignore Visual Studio temporary files, build results, and
-## files generated by popular Visual Studio add-ons.
-# User-specific files
-*.suo
-*.user
-*.userosscache
-*.sln.docstates
-# User-specific folders
-*.sln.ide/
-# Build results
-[Dd]ebug/
-[Dd]ebugPublic/
-[Rr]elease/
-[Rr]eleases/
-x64/
-x86/
-build/
-bld/
-[Bb]in/
-[Oo]bj/
-# Roslyn cache directories
-*.ide/
-# MSTest test Results
-[Tt]est[Rr]esult*/
-[Bb]uild[Ll]og.*
-#NUNIT
-*.VisualState.xml
-TestResult.xml
-# Build Results of an ATL Project
-[Dd]ebugPS/
-[Rr]eleasePS/
-dlldata.c
-*_i.c
-*_p.c
-*_i.h
-*.ilk
-*.meta
-*.obj
-*.pch
-*.pdb
-*.pgc
-*.pgd
-*.rsp
-*.sbr
-*.tlb
-*.tli
-*.tlh
-*.tmp
-*.tmp_proj
-*.log
-*.vspscc
-*.vssscc
-.builds
-*.pidb
-*.svclog
-*.scc
-# Chutzpah Test files
-_Chutzpah*
-# Visual C++ cache files
-ipch/
-*.aps
-*.ncb
-*.opensdf
-*.sdf
-*.cachefile
-# Visual Studio profiler
-*.psess
-*.vsp
-*.vspx
-# TFS 2012 Local Workspace
-$tf/
-# Guidance Automation Toolkit
-*.gpState
-# ReSharper is a .NET coding add-in
-_ReSharper*/
-*.[Rr]e[Ss]harper
-*.DotSettings.user
-# JustCode is a .NET coding addin-in
-.JustCode
-# TeamCity is a build add-in
-_TeamCity*
-# DotCover is a Code Coverage Tool
-*.dotCover
-# NCrunch
-_NCrunch_*
-.*crunch*.local.xml
-# MightyMoose
-*.mm.*
-AutoTest.Net/
-# Web workbench (sass)
-.sass-cache/
-# Installshield output folder
-[Ee]xpress/
-# DocProject is a documentation generator add-in
-DocProject/buildhelp/
-DocProject/Help/*.HxT
-DocProject/Help/*.HxC
-DocProject/Help/*.hhc
-DocProject/Help/*.hhk
-DocProject/Help/*.hhp
-DocProject/Help/Html2
-DocProject/Help/html
-# Click-Once directory
-publish/
-# Publish Web Output
-*.[Pp]ublish.xml
-*.azurePubxml
-# TODO: Comment the next line if you want to checkin your web deploy settings 
-# but database connection strings (with potential passwords) will be unencrypted
-*.pubxml
-*.publishproj
-# NuGet Packages
-*.nupkg
-# The packages folder can be ignored because of Package Restore
-**/packages/*
-# except build/, which is used as an MSBuild target.
-!**/packages/build/
-# If using the old MSBuild-Integrated Package Restore, uncomment this:
-#!**/packages/repositories.config
-# Windows Azure Build Output
-csx/
-*.build.csdef
-# Windows Store app package directory
-AppPackages/
-# Others
-sql/
-*.Cache
-ClientBin/
-[Ss]tyle[Cc]op.*
-~$*
-*~
-*.dbmdl
-*.dbproj.schemaview
-*.pfx
-*.publishsettings
-node_modules/
-bower_components/
-# RIA/Silverlight projects
-Generated_Code/
-# Backup & report files from converting an old project file
-# to a newer Visual Studio version. Backup files are not needed,
-# because we have git ;-)
-_UpgradeReport_Files/
-Backup*/
-UpgradeLog*.XML
-UpgradeLog*.htm
-# SQL Server files
-*.mdf
-*.ldf
-# Business Intelligence projects
-*.rdl.data
-*.bim.layout
-*.bim_*.settings
-# Microsoft Fakes
-FakesAssemblies/
-*.suo
-*.vcxproj.filters
-*.npp
-CMakeFiles/*
-nbproject/*
-*.cd
-*.cd
-a.out
-cmake-build-debug/*
diff --git a/thirdparty/date/CMakeLists.txt b/thirdparty/date/CMakeLists.txt
deleted file mode 100644
index 0569daa..0000000
--- a/thirdparty/date/CMakeLists.txt
+++ /dev/null
@@ -1,164 +0,0 @@
-cmake_minimum_required( VERSION 3.1.0 )
-
-project( date_prj )
-
-include( GNUInstallDirs )
-
-find_package( Threads REQUIRED )
-
-# Override by setting on CMake command line.
-set( CMAKE_CXX_STANDARD 14 CACHE STRING "The C++ standard whose features are requested.")
-
-option( USE_SYSTEM_TZ_DB "Use the operating system's timezone database" ON )
-option( USE_TZ_DB_IN_DOT "Save the timezone database in the current folder" OFF )
-option( BUILD_SHARED_LIBS  "Build a shared version of library" OFF )
-option( ENABLE_DATE_TESTING "Enable unit tests" OFF )
-
-function( print_option OPT )
-	if ( NOT DEFINED PRINT_OPTION_CURR_${OPT} OR ( NOT PRINT_OPTION_CURR_${OPT} STREQUAL ${OPT} ) )
-		set( PRINT_OPTION_CURR_${OPT} ${${OPT}} CACHE BOOL "" )
-		mark_as_advanced(PRINT_OPTION_CURR_${OPT})
-		message( "# date: ${OPT} ${${OPT}}" )
-	endif( )
-endfunction( )
-
-print_option( USE_SYSTEM_TZ_DB )
-print_option( USE_TZ_DB_IN_DOT )
-print_option( BUILD_SHARED_LIBS  )
-print_option( ENABLE_DATE_TESTING )
-
-set( HEADER_FOLDER "include" )
-set( SOURCE_FOLDER "src" )
-set( TEST_FOLDER "test" )
-
-# This is needed so IDE's live MSVC show header files
-set( HEADER_FILES
-	${HEADER_FOLDER}/date/chrono_io.h
-	${HEADER_FOLDER}/date/date.h
-	${HEADER_FOLDER}/date/ios.h
-	${HEADER_FOLDER}/date/islamic.h
-	${HEADER_FOLDER}/date/iso_week.h
-	${HEADER_FOLDER}/date/julian.h
-	${HEADER_FOLDER}/date/tz.h
-	${HEADER_FOLDER}/date/tz_private.h
-)
-
-add_library( tz ${HEADER_FILES} ${SOURCE_FOLDER}/tz.cpp )
-
-if( USE_SYSTEM_TZ_DB )
-	target_compile_definitions( tz PRIVATE -DUSE_AUTOLOAD=0 )
-	target_compile_definitions( tz PRIVATE -DHAS_REMOTE_API=0 )
-	# cannot set USE_OS_TZDB to 1 on Windows
-	if( NOT WIN32 )
-		target_compile_definitions( tz PUBLIC -DUSE_OS_TZDB=1 )
-	endif( )
-else( )
-	target_compile_definitions( tz PRIVATE -DUSE_AUTOLOAD=1 )
-	target_compile_definitions( tz PRIVATE -DHAS_REMOTE_API=1 )
-	target_compile_definitions( tz PUBLIC -DUSE_OS_TZDB=0 )
-	find_package( CURL REQUIRED )
-	include_directories( SYSTEM ${CURL_INCLUDE_DIRS} )
-	set( OPTIONAL_LIBRARIES ${CURL_LIBRARIES} )
-endif( )
-
-if( USE_TZ_DB_IN_DOT )
-	target_compile_definitions( tz PRIVATE -DINSTALL=. )
-endif( )
-
-target_link_libraries( tz ${CMAKE_THREAD_LIBS_INIT} ${OPTIONAL_LIBRARIES} )
-
-# add include folders to the library and targets that consume it
-target_include_directories(tz PUBLIC
-    $<BUILD_INTERFACE:
-        ${CMAKE_CURRENT_SOURCE_DIR}/${HEADER_FOLDER}
-    >
-    $<INSTALL_INTERFACE:
-        include
-    >
-)
-
-add_library(date_interface INTERFACE) # an interface (not a library), to enable automatic include_directory (for when just date.h, but not "tz.h and its lib" are needed)
-
-# add include folders to the INTERFACE and targets that consume it
-target_include_directories(date_interface INTERFACE
-    "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>"
-    $<INSTALL_INTERFACE:include>
-)
-
-if(WIN32 AND NOT CYGWIN)
-    set(DEF_INSTALL_CMAKE_DIR CMake)
-else()
-    set(DEF_INSTALL_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/date)
-endif()
-
-install( TARGETS date_interface EXPORT dateConfig )
-install( EXPORT dateConfig DESTINATION ${DEF_INSTALL_CMAKE_DIR} )
-install( TARGETS tz
-	ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
-	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
-	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})  # This is for Windows
-install( DIRECTORY ${HEADER_FOLDER}/ DESTINATION include/ )
-
-if ( ENABLE_DATE_TESTING )
-
-    enable_testing( )
-
-    add_custom_target( testit COMMAND ${CMAKE_CTEST_COMMAND} )
-
-    add_dependencies( testit tz )
-    function( add_pass_tests TEST_GLOB TEST_PREFIX )
-        file( GLOB_RECURSE FILENAMES ${TEST_GLOB} )
-        include_directories( "${HEADER_FOLDER}/date" )
-
-        foreach( TEST_FILE ${FILENAMES} )
-            get_filename_component( TEST_NAME ${TEST_FILE} NAME_WE )
-            get_filename_component( TEST_EXT ${TEST_FILE} EXT )
-            if( NOT ${TEST_EXT} STREQUAL ".fail.cpp" )
-                set( PREFIX "${TEST_PREFIX}_pass_${TEST_NAME}" )
-                set( BIN_NAME ${PREFIX}_bin )
-                set( TST_NAME ${PREFIX}_test )
-                add_executable( ${BIN_NAME} EXCLUDE_FROM_ALL ${TEST_FILE} )
-                add_test( ${TST_NAME} ${BIN_NAME} )
-                target_link_libraries( ${BIN_NAME} tz )
-                add_dependencies( testit ${BIN_NAME} )
-            endif( )
-        endforeach( )
-    endfunction( )
-
-    function( add_fail_tests TEST_GLOB TEST_PREFIX )
-        file( GLOB_RECURSE FILENAMES ${TEST_GLOB} )
-
-        foreach( TEST_FILE ${FILENAMES} )
-            get_filename_component( TEST_NAME ${TEST_FILE} NAME_WE )
-            get_filename_component( TEST_EXT ${TEST_FILE} EXT )
-
-                set( TEST_TYPE "_fail" )
-
-            set( PREFIX "${TEST_PREFIX}_fail_${TEST_NAME}" )
-            set( BIN_NAME ${PREFIX}_bin )
-            set( TST_NAME ${PREFIX}_test )
-
-            #target_compile_definitions( ${BIN_NAME} PRIVATE ${TST_NAME} )
-            set( TEST_BIN_NAME ${CMAKE_BINARY_DIR}/${BIN_NAME} )
-            add_custom_target( ${BIN_NAME}
-                COMMAND ${PROJECT_SOURCE_DIR}/compile_fail.sh ${TEST_BIN_NAME} ${CMAKE_CXX_COMPILER} -std=c++14 -L${CMAKE_BINARY_DIR}/ -ltz -I${PROJECT_SOURCE_DIR}/${HEADER_FOLDER}/date -o ${BIN_NAME} ${TEST_FILE}
-                WORKING_DIRECTORY ${CMAKE_BINARY_DIR}
-                COMMENT ${TST_NAME}
-                )
-            add_test( ${TST_NAME} "${PROJECT_SOURCE_DIR}/test_fail.sh" ${CMAKE_BINARY_DIR}/${BIN_NAME} WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}/" )
-            #set_tests_properties( ${TST_NAME} PROPERTIES WILL_FAIL TRUE)
-            add_dependencies( testit ${BIN_NAME} )
-        endforeach( )
-    endfunction( )
-
-    file( GLOB children RELATIVE "${PROJECT_SOURCE_DIR}/${TEST_FOLDER}" "${PROJECT_SOURCE_DIR}/${TEST_FOLDER}/*" )
-    foreach( child ${children} )
-        if( IS_DIRECTORY "${PROJECT_SOURCE_DIR}/${TEST_FOLDER}/${child}" )
-            set( CUR_FOLDER "${PROJECT_SOURCE_DIR}/${TEST_FOLDER}/${child}" )
-            add_pass_tests( "${CUR_FOLDER}/*.cpp" ${child} )
-            if( NOT WIN32 )
-                add_fail_tests( "${CUR_FOLDER}/*.fail.cpp" ${child} )
-            endif( )
-        endif( )
-    endforeach( )
-endif( )
diff --git a/thirdparty/date/LICENSE.txt b/thirdparty/date/LICENSE.txt
deleted file mode 100644
index 79ea069..0000000
--- a/thirdparty/date/LICENSE.txt
+++ /dev/null
@@ -1,31 +0,0 @@
-The source code in this project is released using the MIT License. There is no
-global license for the project because each file is licensed individually with
-different author names and/or dates.
-
-If you contribute to this project, please add your name to the license of each
-file you modify.  If you have already contributed to this project and forgot to
-add your name to the license, please feel free to submit a new P/R to add your
-name to the license in each file you modified.
-
-For convenience, here is a copy of the MIT license found in each file except
-without author names or dates:
-
-The MIT License (MIT)
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.
diff --git a/thirdparty/date/README.md b/thirdparty/date/README.md
deleted file mode 100644
index 580d20d..0000000
--- a/thirdparty/date/README.md
+++ /dev/null
@@ -1,58 +0,0 @@
-# Date
-
-[![Join the chat at https://gitter.im/HowardHinnant/date](https://badges.gitter.im/HowardHinnant/date.svg)](https://gitter.im/HowardHinnant/date?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-
----
-
-**[Try it out on wandbox!](https://wandbox.org/permlink/vqwMyTphHJv5iXX7)**
-
-## Summary
-
-This is actually several separate C++11/C++14/C++17 libraries:
-
-1. `"date.h"` is a header-only library which builds upon `<chrono>`.  It adds some new `duration` types, and new `time_point` types.  It also adds "field" types such as `year_month_day` which is a struct `{year, month, day}`.  And it provides convenient means to convert between the "field" types and the `time_point` types.
-
-    * Documentation: http://howardhinnant.github.io/date/date.html
-    * Video: https://www.youtube.com/watch?v=tzyGjOm8AKo
-    * Slides: http://schd.ws/hosted_files/cppcon2015/43/hinnant_dates.pdf
-
-1. `"tz.h"` / `"tz.cpp"`  are a timezone library built on top of the `"date.h"` library.  This timezone library is a complete parser of the IANA timezone database.  It provides for an easy way to access all of the data in this database, using the types from `"date.h"` and `<chrono>`.  The IANA database also includes data on leap seconds, and this library provides utilities to compute with that information as well.
-
-    * Documentation: http://howardhinnant.github.io/date/tz.html
-    * Video: https://www.youtube.com/watch?v=Vwd3pduVGKY
-    * Slides: http://schd.ws/hosted_files/cppcon2016/0f/Welcome%20To%20The%20Time%20Zone%20-%20Howard%20Hinnant%20-%20CppCon%202016.pdf
-
-1. `"iso_week.h"` is a header-only library built on top of the `"date.h"` library which implements the ISO week date calendar.
-
-    * Documentation: http://howardhinnant.github.io/date/iso_week.html
-
-1. `"julian.h"` is a header-only library built on top of the `"date.h"` library which implements a proleptic Julian calendar which is fully interoperable with everything above.
-
-    * Documentation: http://howardhinnant.github.io/date/julian.html
-
-1. `"islamic.h"` is a header-only library built on top of the `"date.h"` library which implements a proleptic Islamic calendar which is fully interoperable with everything above.
-
-    * Documentation: http://howardhinnant.github.io/date/islamic.html
-
-## Standardization
-
-Slightly modified versions of `"date.h"` and `"tz.h"` were voted into the C++20 working draft at the Jacksonville FL meeting on 2018-03-17:
-
-* http://howardhinnant.github.io/date/d0355r7.html
-
-## Build & Test
-
-You will need [CMake](https://cmake.org/) and a recent C++ compiler. Here follows a guide of how to build and test using the CMake Makefile generator.
-
-```bash
-mkdir build
-cd build
-cmake ../
-cmake --build . --target testit # Consider '-- -j4' for multithreading
-```
-## Projects using this library
-
-* www.safe.com
-* www.webtoolkit.eu/wt
-
-If you would like your project (or product) on this list, just let me know.
diff --git a/thirdparty/date/compile_fail.sh b/thirdparty/date/compile_fail.sh
deleted file mode 100755
index 60cf6b9..0000000
--- a/thirdparty/date/compile_fail.sh
+++ /dev/null
@@ -1,16 +0,0 @@
-#!/bin/bash
-export TEST_BIN_NAME=$1
-#echo "Building ${TEST_BIN_NAME}"
-shift 1
-export BUILD_COMMAND=$@
-#echo "Build command: ${BUILD_COMMAND}"
-eval ${BUILD_COMMAND} >/dev/null 2>/dev/null
-
-if [ $? -eq 0 ]; then
-	echo -ne "#!/bin/bash\nexit 1;" > ${TEST_BIN_NAME}
-else
-	echo -ne "#!/bin/bash\nexit 0;" > ${TEST_BIN_NAME}
-fi
-chmod u+x ${TEST_BIN_NAME}
-exit 0;
-
diff --git a/thirdparty/date/include/date/chrono_io.h b/thirdparty/date/include/date/chrono_io.h
deleted file mode 100644
index 21be404..0000000
--- a/thirdparty/date/include/date/chrono_io.h
+++ /dev/null
@@ -1,34 +0,0 @@
-#ifndef CHRONO_IO_H
-#define CHRONO_IO_H
-
-// The MIT License (MIT)
-//
-// Copyright (c) 2016, 2017 Howard Hinnant
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-// Our apologies.  When the previous paragraph was written, lowercase had not yet
-// been invented (that would involve another several millennia of evolution).
-// We did not mean to shout.
-
-// This functionality has moved to "date.h"
-
-#include "date.h"
-
-#endif  // CHRONO_IO_H
diff --git a/thirdparty/date/include/date/date.h b/thirdparty/date/include/date/date.h
deleted file mode 100644
index cb115a9..0000000
--- a/thirdparty/date/include/date/date.h
+++ /dev/null
@@ -1,8022 +0,0 @@
-#ifndef DATE_H
-#define DATE_H
-
-// The MIT License (MIT)
-//
-// Copyright (c) 2015, 2016, 2017 Howard Hinnant
-// Copyright (c) 2016 Adrian Colomitchi
-// Copyright (c) 2017 Florian Dang
-// Copyright (c) 2017 Paul Thompson
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-// Our apologies.  When the previous paragraph was written, lowercase had not yet
-// been invented (that would involve another several millennia of evolution).
-// We did not mean to shout.
-
-#ifndef HAS_STRING_VIEW
-#  if __cplusplus >= 201703
-#    define HAS_STRING_VIEW 1
-#  else
-#    define HAS_STRING_VIEW 0
-#  endif
-#endif  // HAS_STRING_VIEW
-
-#include <cassert>
-#include <algorithm>
-#include <cctype>
-#include <chrono>
-#include <climits>
-#if !(__cplusplus >= 201402)
-#  include <cmath>
-#endif
-#include <cstddef>
-#include <cstdint>
-#include <cstdlib>
-#include <ctime>
-#include <ios>
-#include <istream>
-#include <iterator>
-#include <limits>
-#include <locale>
-#include <memory>
-#include <ostream>
-#include <ratio>
-#include <sstream>
-#include <stdexcept>
-#include <string>
-#if HAS_STRING_VIEW
-# include <string_view>
-#endif
-#include <utility>
-#include <type_traits>
-
-#ifdef __GNUC__
-# pragma GCC diagnostic push
-# pragma GCC diagnostic ignored "-Wpedantic"
-# if __GNUC__ < 5
-   // GCC 4.9 Bug 61489 Wrong warning with -Wmissing-field-initializers
-#  pragma GCC diagnostic ignored "-Wmissing-field-initializers"
-# endif
-#endif
-
-namespace date
-{
-
-//---------------+
-// Configuration |
-//---------------+
-
-#ifndef ONLY_C_LOCALE
-#  define ONLY_C_LOCALE 0
-#endif
-
-#if defined(_MSC_VER) && (!defined(__clang__) || (_MSC_VER < 1910))
-// MSVC
-#  if _MSC_VER < 1910
-//   before VS2017
-#    define CONSTDATA const
-#    define CONSTCD11
-#    define CONSTCD14
-#    define NOEXCEPT _NOEXCEPT
-#  else
-//   VS2017 and later
-#    define CONSTDATA constexpr const
-#    define CONSTCD11 constexpr
-#    define CONSTCD14 constexpr
-#    define NOEXCEPT noexcept
-#  endif
-
-#elif defined(__SUNPRO_CC) && __SUNPRO_CC <= 0x5150
-// Oracle Developer Studio 12.6 and earlier
-#  define CONSTDATA constexpr const
-#  define CONSTCD11 constexpr
-#  define CONSTCD14
-#  define NOEXCEPT noexcept
-
-#elif __cplusplus >= 201402
-// C++14
-#  define CONSTDATA constexpr const
-#  define CONSTCD11 constexpr
-#  define CONSTCD14 constexpr
-#  define NOEXCEPT noexcept
-#else
-// C++11
-#  define CONSTDATA constexpr const
-#  define CONSTCD11 constexpr
-#  define CONSTCD14
-#  define NOEXCEPT noexcept
-#endif
-
-#ifndef HAS_VOID_T
-#  if __cplusplus >= 201703
-#    define HAS_VOID_T 1
-#  else
-#    define HAS_VOID_T 0
-#  endif
-#endif  // HAS_VOID_T
-
-// Protect from Oracle sun macro
-#ifdef sun
-#  undef sun
-#endif
-
-//-----------+
-// Interface |
-//-----------+
-
-// durations
-
-using days = std::chrono::duration
-    <int, std::ratio_multiply<std::ratio<24>, std::chrono::hours::period>>;
-
-using weeks = std::chrono::duration
-    <int, std::ratio_multiply<std::ratio<7>, days::period>>;
-
-using years = std::chrono::duration
-    <int, std::ratio_multiply<std::ratio<146097, 400>, days::period>>;
-
-using months = std::chrono::duration
-    <int, std::ratio_divide<years::period, std::ratio<12>>>;
-
-// time_point
-
-template <class Duration>
-    using sys_time = std::chrono::time_point<std::chrono::system_clock, Duration>;
-
-using sys_days    = sys_time<days>;
-using sys_seconds = sys_time<std::chrono::seconds>;
-
-struct local_t {};
-
-template <class Duration>
-    using local_time = std::chrono::time_point<local_t, Duration>;
-
-using local_seconds = local_time<std::chrono::seconds>;
-using local_days    = local_time<days>;
-
-// types
-
-struct last_spec
-{
-    explicit last_spec() = default;
-};
-
-class day;
-class month;
-class year;
-
-class weekday;
-class weekday_indexed;
-class weekday_last;
-
-class month_day;
-class month_day_last;
-class month_weekday;
-class month_weekday_last;
-
-class year_month;
-
-class year_month_day;
-class year_month_day_last;
-class year_month_weekday;
-class year_month_weekday_last;
-
-// date composition operators
-
-CONSTCD11 year_month operator/(const year& y, const month& m) NOEXCEPT;
-CONSTCD11 year_month operator/(const year& y, int          m) NOEXCEPT;
-
-CONSTCD11 month_day operator/(const day& d, const month& m) NOEXCEPT;
-CONSTCD11 month_day operator/(const day& d, int          m) NOEXCEPT;
-CONSTCD11 month_day operator/(const month& m, const day& d) NOEXCEPT;
-CONSTCD11 month_day operator/(const month& m, int        d) NOEXCEPT;
-CONSTCD11 month_day operator/(int          m, const day& d) NOEXCEPT;
-
-CONSTCD11 month_day_last operator/(const month& m, last_spec) NOEXCEPT;
-CONSTCD11 month_day_last operator/(int          m, last_spec) NOEXCEPT;
-CONSTCD11 month_day_last operator/(last_spec, const month& m) NOEXCEPT;
-CONSTCD11 month_day_last operator/(last_spec, int          m) NOEXCEPT;
-
-CONSTCD11 month_weekday operator/(const month& m, const weekday_indexed& wdi) NOEXCEPT;
-CONSTCD11 month_weekday operator/(int          m, const weekday_indexed& wdi) NOEXCEPT;
-CONSTCD11 month_weekday operator/(const weekday_indexed& wdi, const month& m) NOEXCEPT;
-CONSTCD11 month_weekday operator/(const weekday_indexed& wdi, int          m) NOEXCEPT;
-
-CONSTCD11 month_weekday_last operator/(const month& m, const weekday_last& wdl) NOEXCEPT;
-CONSTCD11 month_weekday_last operator/(int          m, const weekday_last& wdl) NOEXCEPT;
-CONSTCD11 month_weekday_last operator/(const weekday_last& wdl, const month& m) NOEXCEPT;
-CONSTCD11 month_weekday_last operator/(const weekday_last& wdl, int          m) NOEXCEPT;
-
-CONSTCD11 year_month_day operator/(const year_month& ym, const day& d) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const year_month& ym, int        d) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const year& y, const month_day& md) NOEXCEPT;
-CONSTCD11 year_month_day operator/(int         y, const month_day& md) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const month_day& md, const year& y) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const month_day& md, int         y) NOEXCEPT;
-
-CONSTCD11
-    year_month_day_last operator/(const year_month& ym,   last_spec) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(const year& y, const month_day_last& mdl) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(int         y, const month_day_last& mdl) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(const month_day_last& mdl, const year& y) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(const month_day_last& mdl, int         y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const year_month& ym, const weekday_indexed& wdi) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const year&        y, const month_weekday&   mwd) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(int                y, const month_weekday&   mwd) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const month_weekday& mwd, const year&          y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const month_weekday& mwd, int                  y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const year_month& ym, const weekday_last& wdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const year& y, const month_weekday_last& mwdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(int         y, const month_weekday_last& mwdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, const year& y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, int         y) NOEXCEPT;
-
-// Detailed interface
-
-// day
-
-class day
-{
-    unsigned char d_;
-
-public:
-    day() = default;
-    explicit CONSTCD11 day(unsigned d) NOEXCEPT;
-
-    CONSTCD14 day& operator++()    NOEXCEPT;
-    CONSTCD14 day  operator++(int) NOEXCEPT;
-    CONSTCD14 day& operator--()    NOEXCEPT;
-    CONSTCD14 day  operator--(int) NOEXCEPT;
-
-    CONSTCD14 day& operator+=(const days& d) NOEXCEPT;
-    CONSTCD14 day& operator-=(const days& d) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator< (const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator> (const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const day& x, const day& y) NOEXCEPT;
-
-CONSTCD11 day  operator+(const day&  x, const days& y) NOEXCEPT;
-CONSTCD11 day  operator+(const days& x, const day&  y) NOEXCEPT;
-CONSTCD11 day  operator-(const day&  x, const days& y) NOEXCEPT;
-CONSTCD11 days operator-(const day&  x, const day&  y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const day& d);
-
-// month
-
-class month
-{
-    unsigned char m_;
-
-public:
-    month() = default;
-    explicit CONSTCD11 month(unsigned m) NOEXCEPT;
-
-    CONSTCD14 month& operator++()    NOEXCEPT;
-    CONSTCD14 month  operator++(int) NOEXCEPT;
-    CONSTCD14 month& operator--()    NOEXCEPT;
-    CONSTCD14 month  operator--(int) NOEXCEPT;
-
-    CONSTCD14 month& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 month& operator-=(const months& m) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator< (const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator> (const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const month& x, const month& y) NOEXCEPT;
-
-CONSTCD14 month  operator+(const month&  x, const months& y) NOEXCEPT;
-CONSTCD14 month  operator+(const months& x,  const month& y) NOEXCEPT;
-CONSTCD14 month  operator-(const month&  x, const months& y) NOEXCEPT;
-CONSTCD14 months operator-(const month&  x,  const month& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month& m);
-
-// year
-
-class year
-{
-    short y_;
-
-public:
-    year() = default;
-    explicit CONSTCD11 year(int y) NOEXCEPT;
-
-    CONSTCD14 year& operator++()    NOEXCEPT;
-    CONSTCD14 year  operator++(int) NOEXCEPT;
-    CONSTCD14 year& operator--()    NOEXCEPT;
-    CONSTCD14 year  operator--(int) NOEXCEPT;
-
-    CONSTCD14 year& operator+=(const years& y) NOEXCEPT;
-    CONSTCD14 year& operator-=(const years& y) NOEXCEPT;
-
-    CONSTCD11 year operator-() const NOEXCEPT;
-    CONSTCD11 year operator+() const NOEXCEPT;
-
-    CONSTCD11 bool is_leap() const NOEXCEPT;
-
-    CONSTCD11 explicit operator int() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-    static CONSTCD11 year min() NOEXCEPT;
-    static CONSTCD11 year max() NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year& x, const year& y) NOEXCEPT;
-
-CONSTCD11 year  operator+(const year&  x, const years& y) NOEXCEPT;
-CONSTCD11 year  operator+(const years& x, const year&  y) NOEXCEPT;
-CONSTCD11 year  operator-(const year&  x, const years& y) NOEXCEPT;
-CONSTCD11 years operator-(const year&  x, const year&  y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year& y);
-
-// weekday
-
-class weekday
-{
-    unsigned char wd_;
-public:
-    weekday() = default;
-    explicit CONSTCD11 weekday(unsigned wd) NOEXCEPT;
-    CONSTCD11 weekday(const sys_days& dp) NOEXCEPT;
-    CONSTCD11 explicit weekday(const local_days& dp) NOEXCEPT;
-
-    CONSTCD14 weekday& operator++()    NOEXCEPT;
-    CONSTCD14 weekday  operator++(int) NOEXCEPT;
-    CONSTCD14 weekday& operator--()    NOEXCEPT;
-    CONSTCD14 weekday  operator--(int) NOEXCEPT;
-
-    CONSTCD14 weekday& operator+=(const days& d) NOEXCEPT;
-    CONSTCD14 weekday& operator-=(const days& d) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-    CONSTCD11 weekday_indexed operator[](unsigned index) const NOEXCEPT;
-    CONSTCD11 weekday_last    operator[](last_spec)      const NOEXCEPT;
-
-private:
-    static CONSTCD11 unsigned char weekday_from_days(int z) NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday& x, const weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday& x, const weekday& y) NOEXCEPT;
-
-CONSTCD14 weekday operator+(const weekday& x, const days&    y) NOEXCEPT;
-CONSTCD14 weekday operator+(const days&    x, const weekday& y) NOEXCEPT;
-CONSTCD14 weekday operator-(const weekday& x, const days&    y) NOEXCEPT;
-CONSTCD14 days    operator-(const weekday& x, const weekday& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday& wd);
-
-// weekday_indexed
-
-class weekday_indexed
-{
-    unsigned char wd_    : 4;
-    unsigned char index_ : 4;
-
-public:
-    weekday_indexed() = default;
-    CONSTCD11 weekday_indexed(const date::weekday& wd, unsigned index) NOEXCEPT;
-
-    CONSTCD11 date::weekday weekday() const NOEXCEPT;
-    CONSTCD11 unsigned index() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_indexed& wdi);
-
-// weekday_last
-
-class weekday_last
-{
-    date::weekday wd_;
-
-public:
-    explicit CONSTCD11 weekday_last(const date::weekday& wd) NOEXCEPT;
-
-    CONSTCD11 date::weekday weekday() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday_last& x, const weekday_last& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday_last& x, const weekday_last& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_last& wdl);
-
-// year_month
-
-class year_month
-{
-    date::year  y_;
-    date::month m_;
-
-public:
-    year_month() = default;
-    CONSTCD11 year_month(const date::year& y, const date::month& m) NOEXCEPT;
-
-    CONSTCD11 date::year  year()  const NOEXCEPT;
-    CONSTCD11 date::month month() const NOEXCEPT;
-
-    CONSTCD14 year_month& operator+=(const months& dm) NOEXCEPT;
-    CONSTCD14 year_month& operator-=(const months& dm) NOEXCEPT;
-    CONSTCD14 year_month& operator+=(const years& dy) NOEXCEPT;
-    CONSTCD14 year_month& operator-=(const years& dy) NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_month& x, const year_month& y) NOEXCEPT;
-
-CONSTCD14 year_month operator+(const year_month& ym, const months& dm) NOEXCEPT;
-CONSTCD14 year_month operator+(const months& dm, const year_month& ym) NOEXCEPT;
-CONSTCD14 year_month operator-(const year_month& ym, const months& dm) NOEXCEPT;
-
-CONSTCD11 months operator-(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 year_month operator+(const year_month& ym, const years& dy) NOEXCEPT;
-CONSTCD11 year_month operator+(const years& dy, const year_month& ym) NOEXCEPT;
-CONSTCD11 year_month operator-(const year_month& ym, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month& ym);
-
-// month_day
-
-class month_day
-{
-    date::month m_;
-    date::day   d_;
-
-public:
-    month_day() = default;
-    CONSTCD11 month_day(const date::month& m, const date::day& d) NOEXCEPT;
-
-    CONSTCD11 date::month month() const NOEXCEPT;
-    CONSTCD11 date::day   day() const NOEXCEPT;
-
-    CONSTCD14 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator< (const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator> (const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const month_day& x, const month_day& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day& md);
-
-// month_day_last
-
-class month_day_last
-{
-    date::month m_;
-
-public:
-    CONSTCD11 explicit month_day_last(const date::month& m) NOEXCEPT;
-
-    CONSTCD11 date::month month() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator< (const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator> (const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day_last& mdl);
-
-// month_weekday
-
-class month_weekday
-{
-    date::month           m_;
-    date::weekday_indexed wdi_;
-public:
-    CONSTCD11 month_weekday(const date::month& m,
-                            const date::weekday_indexed& wdi) NOEXCEPT;
-
-    CONSTCD11 date::month           month()           const NOEXCEPT;
-    CONSTCD11 date::weekday_indexed weekday_indexed() const NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month_weekday& x, const month_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month_weekday& x, const month_weekday& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday& mwd);
-
-// month_weekday_last
-
-class month_weekday_last
-{
-    date::month        m_;
-    date::weekday_last wdl_;
-
-public:
-    CONSTCD11 month_weekday_last(const date::month& m,
-                                 const date::weekday_last& wd) NOEXCEPT;
-
-    CONSTCD11 date::month        month()        const NOEXCEPT;
-    CONSTCD11 date::weekday_last weekday_last() const NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11
-    bool operator==(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator!=(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday_last& mwdl);
-
-// class year_month_day
-
-class year_month_day
-{
-    date::year  y_;
-    date::month m_;
-    date::day   d_;
-
-public:
-    year_month_day() = default;
-    CONSTCD11 year_month_day(const date::year& y, const date::month& m,
-                             const date::day& d) NOEXCEPT;
-    CONSTCD14 year_month_day(const year_month_day_last& ymdl) NOEXCEPT;
-
-    CONSTCD14 year_month_day(sys_days dp) NOEXCEPT;
-    CONSTCD14 explicit year_month_day(local_days dp) NOEXCEPT;
-
-    CONSTCD14 year_month_day& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day& operator+=(const years& y)  NOEXCEPT;
-    CONSTCD14 year_month_day& operator-=(const years& y)  NOEXCEPT;
-
-    CONSTCD11 date::year  year()  const NOEXCEPT;
-    CONSTCD11 date::month month() const NOEXCEPT;
-    CONSTCD11 date::day   day()   const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD14 bool ok() const NOEXCEPT;
-
-private:
-    static CONSTCD14 year_month_day from_days(days dp) NOEXCEPT;
-    CONSTCD14 days to_days() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-
-CONSTCD14 year_month_day operator+(const year_month_day& ymd, const months& dm) NOEXCEPT;
-CONSTCD14 year_month_day operator+(const months& dm, const year_month_day& ymd) NOEXCEPT;
-CONSTCD14 year_month_day operator-(const year_month_day& ymd, const months& dm) NOEXCEPT;
-CONSTCD11 year_month_day operator+(const year_month_day& ymd, const years& dy)  NOEXCEPT;
-CONSTCD11 year_month_day operator+(const years& dy, const year_month_day& ymd)  NOEXCEPT;
-CONSTCD11 year_month_day operator-(const year_month_day& ymd, const years& dy)  NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day& ymd);
-
-// year_month_day_last
-
-class year_month_day_last
-{
-    date::year           y_;
-    date::month_day_last mdl_;
-
-public:
-    CONSTCD11 year_month_day_last(const date::year& y,
-                                  const date::month_day_last& mdl) NOEXCEPT;
-
-    CONSTCD14 year_month_day_last& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day_last& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day_last& operator+=(const years& y)  NOEXCEPT;
-    CONSTCD14 year_month_day_last& operator-=(const years& y)  NOEXCEPT;
-
-    CONSTCD11 date::year           year()           const NOEXCEPT;
-    CONSTCD11 date::month          month()          const NOEXCEPT;
-    CONSTCD11 date::month_day_last month_day_last() const NOEXCEPT;
-    CONSTCD14 date::day            day()            const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11
-    bool operator==(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator!=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator< (const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator> (const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator<=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator>=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-
-CONSTCD14
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const months& dm) NOEXCEPT;
-
-CONSTCD14
-year_month_day_last
-operator+(const months& dm, const year_month_day_last& ymdl) NOEXCEPT;
-
-CONSTCD11
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const years& dy) NOEXCEPT;
-
-CONSTCD11
-year_month_day_last
-operator+(const years& dy, const year_month_day_last& ymdl) NOEXCEPT;
-
-CONSTCD14
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const months& dm) NOEXCEPT;
-
-CONSTCD11
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day_last& ymdl);
-
-// year_month_weekday
-
-class year_month_weekday
-{
-    date::year            y_;
-    date::month           m_;
-    date::weekday_indexed wdi_;
-
-public:
-    year_month_weekday() = default;
-    CONSTCD11 year_month_weekday(const date::year& y, const date::month& m,
-                                   const date::weekday_indexed& wdi) NOEXCEPT;
-    CONSTCD14 year_month_weekday(const sys_days& dp) NOEXCEPT;
-    CONSTCD14 explicit year_month_weekday(const local_days& dp) NOEXCEPT;
-
-    CONSTCD14 year_month_weekday& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday& operator+=(const years& y)  NOEXCEPT;
-    CONSTCD14 year_month_weekday& operator-=(const years& y)  NOEXCEPT;
-
-    CONSTCD11 date::year year() const NOEXCEPT;
-    CONSTCD11 date::month month() const NOEXCEPT;
-    CONSTCD11 date::weekday weekday() const NOEXCEPT;
-    CONSTCD11 unsigned index() const NOEXCEPT;
-    CONSTCD11 date::weekday_indexed weekday_indexed() const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD14 bool ok() const NOEXCEPT;
-
-private:
-    static CONSTCD14 year_month_weekday from_days(days dp) NOEXCEPT;
-    CONSTCD14 days to_days() const NOEXCEPT;
-};
-
-CONSTCD11
-    bool operator==(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT;
-CONSTCD11
-    bool operator!=(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const months& dm) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday
-operator+(const months& dm, const year_month_weekday& ymwd) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const years& dy) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator+(const years& dy, const year_month_weekday& ymwd) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const months& dm) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday& ymwdi);
-
-// year_month_weekday_last
-
-class year_month_weekday_last
-{
-    date::year y_;
-    date::month m_;
-    date::weekday_last wdl_;
-
-public:
-    CONSTCD11 year_month_weekday_last(const date::year& y, const date::month& m,
-                                      const date::weekday_last& wdl) NOEXCEPT;
-
-    CONSTCD14 year_month_weekday_last& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday_last& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday_last& operator+=(const years& y) NOEXCEPT;
-    CONSTCD14 year_month_weekday_last& operator-=(const years& y) NOEXCEPT;
-
-    CONSTCD11 date::year year() const NOEXCEPT;
-    CONSTCD11 date::month month() const NOEXCEPT;
-    CONSTCD11 date::weekday weekday() const NOEXCEPT;
-    CONSTCD11 date::weekday_last weekday_last() const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-private:
-    CONSTCD14 days to_days() const NOEXCEPT;
-};
-
-CONSTCD11
-bool
-operator==(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT;
-
-CONSTCD11
-bool
-operator!=(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday_last
-operator+(const months& dm, const year_month_weekday_last& ymwdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator+(const years& dy, const year_month_weekday_last& ymwdl) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday_last& ymwdl);
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-inline namespace literals
-{
-
-CONSTCD11 date::day  operator "" _d(unsigned long long d) NOEXCEPT;
-CONSTCD11 date::year operator "" _y(unsigned long long y) NOEXCEPT;
-
-// CONSTDATA date::month jan{1};
-// CONSTDATA date::month feb{2};
-// CONSTDATA date::month mar{3};
-// CONSTDATA date::month apr{4};
-// CONSTDATA date::month may{5};
-// CONSTDATA date::month jun{6};
-// CONSTDATA date::month jul{7};
-// CONSTDATA date::month aug{8};
-// CONSTDATA date::month sep{9};
-// CONSTDATA date::month oct{10};
-// CONSTDATA date::month nov{11};
-// CONSTDATA date::month dec{12};
-//
-// CONSTDATA date::weekday sun{0u};
-// CONSTDATA date::weekday mon{1u};
-// CONSTDATA date::weekday tue{2u};
-// CONSTDATA date::weekday wed{3u};
-// CONSTDATA date::weekday thu{4u};
-// CONSTDATA date::weekday fri{5u};
-// CONSTDATA date::weekday sat{6u};
-
-}  // inline namespace literals
-#endif // !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-#if HAS_VOID_T
-
-template <class T, class = std::void_t<>>
-struct is_clock
-    : std::false_type
-{};
-
-template <class T>
-struct is_clock<T, std::void_t<decltype(T::now()), typename T::rep, typename T::period,
-                               typename T::duration, typename T::time_point,
-                               decltype(T::is_steady)>>
-    : std::true_type
-{};
-
-#endif  // HAS_VOID_T
-
-//----------------+
-// Implementation |
-//----------------+
-
-// utilities
-namespace detail {
-
-template<class CharT, class Traits = std::char_traits<CharT>>
-class save_stream
-{
-    std::basic_ostream<CharT, Traits>& os_;
-    CharT fill_;
-    std::ios::fmtflags flags_;
-    std::locale loc_;
-
-public:
-    ~save_stream()
-    {
-        os_.fill(fill_);
-        os_.flags(flags_);
-        os_.imbue(loc_);
-    }
-
-    save_stream(const save_stream&) = delete;
-    save_stream& operator=(const save_stream&) = delete;
-
-    explicit save_stream(std::basic_ostream<CharT, Traits>& os)
-        : os_(os)
-        , fill_(os.fill())
-        , flags_(os.flags())
-        , loc_(os.getloc())
-        {}
-};
-
-template <class T>
-struct choose_trunc_type
-{
-    static const int digits = std::numeric_limits<T>::digits;
-    using type = typename std::conditional
-                 <
-                     digits < 32,
-                     std::int32_t,
-                     typename std::conditional
-                     <
-                         digits < 64,
-                         std::int64_t,
-#ifdef __SIZEOF_INT128__
-                         __int128
-#else
-                         std::int64_t
-#endif
-                     >::type
-                 >::type;
-};
-
-template <class T>
-CONSTCD11
-inline
-typename std::enable_if
-<
-    !std::chrono::treat_as_floating_point<T>::value,
-    T
->::type
-trunc(T t) NOEXCEPT
-{
-    return t;
-}
-
-template <class T>
-CONSTCD14
-inline
-typename std::enable_if
-<
-    std::chrono::treat_as_floating_point<T>::value,
-    T
->::type
-trunc(T t) NOEXCEPT
-{
-    using namespace std;
-    using I = typename choose_trunc_type<T>::type;
-    CONSTDATA auto digits = numeric_limits<T>::digits;
-    static_assert(digits < numeric_limits<I>::digits, "");
-    CONSTDATA auto max = I{1} << (digits-1);
-    CONSTDATA auto min = -max;
-    const auto negative = t < T{0};
-    if (min <= t && t <= max && t != 0 && t == t)
-    {
-        t = static_cast<T>(static_cast<I>(t));
-        if (t == 0 && negative)
-            t = -t;
-    }
-    return t;
-}
-
-template <std::intmax_t Xp, std::intmax_t Yp>
-struct static_gcd
-{
-    static const std::intmax_t value = static_gcd<Yp, Xp % Yp>::value;
-};
-
-template <std::intmax_t Xp>
-struct static_gcd<Xp, 0>
-{
-    static const std::intmax_t value = Xp;
-};
-
-template <>
-struct static_gcd<0, 0>
-{
-    static const std::intmax_t value = 1;
-};
-
-template <class R1, class R2>
-struct no_overflow
-{
-private:
-    static const std::intmax_t gcd_n1_n2 = static_gcd<R1::num, R2::num>::value;
-    static const std::intmax_t gcd_d1_d2 = static_gcd<R1::den, R2::den>::value;
-    static const std::intmax_t n1 = R1::num / gcd_n1_n2;
-    static const std::intmax_t d1 = R1::den / gcd_d1_d2;
-    static const std::intmax_t n2 = R2::num / gcd_n1_n2;
-    static const std::intmax_t d2 = R2::den / gcd_d1_d2;
-    static const std::intmax_t max = -((std::intmax_t(1) <<
-                                       (sizeof(std::intmax_t) * CHAR_BIT - 1)) + 1);
-
-    template <std::intmax_t Xp, std::intmax_t Yp, bool overflow>
-    struct mul    // overflow == false
-    {
-        static const std::intmax_t value = Xp * Yp;
-    };
-
-    template <std::intmax_t Xp, std::intmax_t Yp>
-    struct mul<Xp, Yp, true>
-    {
-        static const std::intmax_t value = 1;
-    };
-
-public:
-    static const bool value = (n1 <= max / d2) && (n2 <= max / d1);
-    typedef std::ratio<mul<n1, d2, !value>::value,
-                       mul<n2, d1, !value>::value> type;
-};
-
-}  // detail
-
-// trunc towards zero
-template <class To, class Rep, class Period>
-CONSTCD11
-inline
-typename std::enable_if
-<
-    detail::no_overflow<Period, typename To::period>::value,
-    To
->::type
-trunc(const std::chrono::duration<Rep, Period>& d)
-{
-    return To{detail::trunc(std::chrono::duration_cast<To>(d).count())};
-}
-
-template <class To, class Rep, class Period>
-CONSTCD11
-inline
-typename std::enable_if
-<
-    !detail::no_overflow<Period, typename To::period>::value,
-    To
->::type
-trunc(const std::chrono::duration<Rep, Period>& d)
-{
-    using namespace std::chrono;
-    using rep = typename std::common_type<Rep, typename To::rep>::type;
-    return To{detail::trunc(duration_cast<To>(duration_cast<duration<rep>>(d)).count())};
-}
-
-#ifndef HAS_CHRONO_ROUNDING
-#  if defined(_MSC_FULL_VER) && (_MSC_FULL_VER >= 190023918 || (_MSC_FULL_VER >= 190000000 && defined (__clang__)))
-#    define HAS_CHRONO_ROUNDING 1
-#  elif defined(__cpp_lib_chrono) && __cplusplus > 201402 && __cpp_lib_chrono >= 201510
-#    define HAS_CHRONO_ROUNDING 1
-#  elif defined(_LIBCPP_VERSION) && __cplusplus > 201402 && _LIBCPP_VERSION >= 3800
-#    define HAS_CHRONO_ROUNDING 1
-#  else
-#    define HAS_CHRONO_ROUNDING 0
-#  endif
-#endif  // HAS_CHRONO_ROUNDING
-
-#if HAS_CHRONO_ROUNDING == 0
-
-// round down
-template <class To, class Rep, class Period>
-CONSTCD14
-inline
-typename std::enable_if
-<
-    detail::no_overflow<Period, typename To::period>::value,
-    To
->::type
-floor(const std::chrono::duration<Rep, Period>& d)
-{
-    auto t = trunc<To>(d);
-    if (t > d)
-        return t - To{1};
-    return t;
-}
-
-template <class To, class Rep, class Period>
-CONSTCD14
-inline
-typename std::enable_if
-<
-    !detail::no_overflow<Period, typename To::period>::value,
-    To
->::type
-floor(const std::chrono::duration<Rep, Period>& d)
-{
-    using namespace std::chrono;
-    using rep = typename std::common_type<Rep, typename To::rep>::type;
-    return floor<To>(floor<duration<rep>>(d));
-}
-
-// round to nearest, to even on tie
-template <class To, class Rep, class Period>
-CONSTCD14
-inline
-To
-round(const std::chrono::duration<Rep, Period>& d)
-{
-    auto t0 = floor<To>(d);
-    auto t1 = t0 + To{1};
-    if (t1 == To{0} && t0 < To{0})
-        t1 = -t1;
-    auto diff0 = d - t0;
-    auto diff1 = t1 - d;
-    if (diff0 == diff1)
-    {
-        if (t0 - trunc<To>(t0/2)*2 == To{0})
-            return t0;
-        return t1;
-    }
-    if (diff0 < diff1)
-        return t0;
-    return t1;
-}
-
-// round up
-template <class To, class Rep, class Period>
-CONSTCD14
-inline
-To
-ceil(const std::chrono::duration<Rep, Period>& d)
-{
-    auto t = trunc<To>(d);
-    if (t < d)
-        return t + To{1};
-    return t;
-}
-
-template <class Rep, class Period,
-          class = typename std::enable_if
-          <
-              std::numeric_limits<Rep>::is_signed
-          >::type>
-CONSTCD11
-std::chrono::duration<Rep, Period>
-abs(std::chrono::duration<Rep, Period> d)
-{
-    return d >= d.zero() ? d : -d;
-}
-
-// round down
-template <class To, class Clock, class FromDuration>
-CONSTCD11
-inline
-std::chrono::time_point<Clock, To>
-floor(const std::chrono::time_point<Clock, FromDuration>& tp)
-{
-    using std::chrono::time_point;
-    return time_point<Clock, To>{date::floor<To>(tp.time_since_epoch())};
-}
-
-// round to nearest, to even on tie
-template <class To, class Clock, class FromDuration>
-CONSTCD11
-inline
-std::chrono::time_point<Clock, To>
-round(const std::chrono::time_point<Clock, FromDuration>& tp)
-{
-    using std::chrono::time_point;
-    return time_point<Clock, To>{round<To>(tp.time_since_epoch())};
-}
-
-// round up
-template <class To, class Clock, class FromDuration>
-CONSTCD11
-inline
-std::chrono::time_point<Clock, To>
-ceil(const std::chrono::time_point<Clock, FromDuration>& tp)
-{
-    using std::chrono::time_point;
-    return time_point<Clock, To>{ceil<To>(tp.time_since_epoch())};
-}
-
-#else  // HAS_CHRONO_ROUNDING == 1
-
-using std::chrono::floor;
-using std::chrono::ceil;
-using std::chrono::round;
-using std::chrono::abs;
-
-#endif  // HAS_CHRONO_ROUNDING
-
-// trunc towards zero
-template <class To, class Clock, class FromDuration>
-CONSTCD11
-inline
-std::chrono::time_point<Clock, To>
-trunc(const std::chrono::time_point<Clock, FromDuration>& tp)
-{
-    using std::chrono::time_point;
-    return time_point<Clock, To>{trunc<To>(tp.time_since_epoch())};
-}
-
-// day
-
-CONSTCD11 inline day::day(unsigned d) NOEXCEPT : d_(static_cast<unsigned char>(d)) {}
-CONSTCD14 inline day& day::operator++() NOEXCEPT {++d_; return *this;}
-CONSTCD14 inline day day::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline day& day::operator--() NOEXCEPT {--d_; return *this;}
-CONSTCD14 inline day day::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-CONSTCD14 inline day& day::operator+=(const days& d) NOEXCEPT {*this = *this + d; return *this;}
-CONSTCD14 inline day& day::operator-=(const days& d) NOEXCEPT {*this = *this - d; return *this;}
-CONSTCD11 inline day::operator unsigned() const NOEXCEPT {return d_;}
-CONSTCD11 inline bool day::ok() const NOEXCEPT {return 1 <= d_ && d_ <= 31;}
-
-CONSTCD11
-inline
-bool
-operator==(const day& x, const day& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const day& x, const day& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const day& x, const day& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) < static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const day& x, const day& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const day& x, const day& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const day& x, const day& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-days
-operator-(const day& x, const day& y) NOEXCEPT
-{
-    return days{static_cast<days::rep>(static_cast<unsigned>(x)
-                                     - static_cast<unsigned>(y))};
-}
-
-CONSTCD11
-inline
-day
-operator+(const day& x, const days& y) NOEXCEPT
-{
-    return day{static_cast<unsigned>(x) + static_cast<unsigned>(y.count())};
-}
-
-CONSTCD11
-inline
-day
-operator+(const days& x, const day& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD11
-inline
-day
-operator-(const day& x, const days& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const day& d)
-{
-    detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::right);
-    os.width(2);
-    os << static_cast<unsigned>(d);
-    if (!d.ok())
-        os << " is not a valid day";
-    return os;
-}
-
-// month
-
-CONSTCD11 inline month::month(unsigned m) NOEXCEPT : m_(static_cast<decltype(m_)>(m)) {}
-CONSTCD14 inline month& month::operator++() NOEXCEPT {*this += months{1}; return *this;}
-CONSTCD14 inline month month::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline month& month::operator--() NOEXCEPT {*this -= months{1}; return *this;}
-CONSTCD14 inline month month::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-
-CONSTCD14
-inline
-month&
-month::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-month&
-month::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD11 inline month::operator unsigned() const NOEXCEPT {return m_;}
-CONSTCD11 inline bool month::ok() const NOEXCEPT {return 1 <= m_ && m_ <= 12;}
-
-CONSTCD11
-inline
-bool
-operator==(const month& x, const month& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month& x, const month& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const month& x, const month& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) < static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const month& x, const month& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const month& x, const month& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const month& x, const month& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD14
-inline
-months
-operator-(const month& x, const month& y) NOEXCEPT
-{
-    auto const d = static_cast<unsigned>(x) - static_cast<unsigned>(y);
-    return months(d <= 11 ? d : d + 12);
-}
-
-CONSTCD14
-inline
-month
-operator+(const month& x, const months& y) NOEXCEPT
-{
-    auto const mu = static_cast<long long>(static_cast<unsigned>(x)) + (y.count() - 1);
-    auto const yr = (mu >= 0 ? mu : mu-11) / 12;
-    return month{static_cast<unsigned>(mu - yr * 12 + 1)};
-}
-
-CONSTCD14
-inline
-month
-operator+(const months& x, const month& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD14
-inline
-month
-operator-(const month& x, const months& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month& m)
-{
-    if (m.ok())
-    {
-        CharT fmt[] = {'%', 'b', 0};
-        os << format(os.getloc(), fmt, m);
-    }
-    else
-        os << static_cast<unsigned>(m) << " is not a valid month";
-    return os;
-}
-
-// year
-
-CONSTCD11 inline year::year(int y) NOEXCEPT : y_(static_cast<decltype(y_)>(y)) {}
-CONSTCD14 inline year& year::operator++() NOEXCEPT {++y_; return *this;}
-CONSTCD14 inline year year::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline year& year::operator--() NOEXCEPT {--y_; return *this;}
-CONSTCD14 inline year year::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-CONSTCD14 inline year& year::operator+=(const years& y) NOEXCEPT {*this = *this + y; return *this;}
-CONSTCD14 inline year& year::operator-=(const years& y) NOEXCEPT {*this = *this - y; return *this;}
-CONSTCD11 inline year year::operator-() const NOEXCEPT {return year{-y_};}
-CONSTCD11 inline year year::operator+() const NOEXCEPT {return *this;}
-
-CONSTCD11
-inline
-bool
-year::is_leap() const NOEXCEPT
-{
-    return y_ % 4 == 0 && (y_ % 100 != 0 || y_ % 400 == 0);
-}
-
-CONSTCD11 inline year::operator int() const NOEXCEPT {return y_;}
-
-CONSTCD11
-inline
-bool
-year::ok() const NOEXCEPT
-{
-    return y_ != std::numeric_limits<short>::min();
-}
-
-CONSTCD11
-inline
-year
-year::min() NOEXCEPT
-{
-    return year{-32767};
-}
-
-CONSTCD11
-inline
-year
-year::max() NOEXCEPT
-{
-    return year{32767};
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year& x, const year& y) NOEXCEPT
-{
-    return static_cast<int>(x) == static_cast<int>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year& x, const year& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year& x, const year& y) NOEXCEPT
-{
-    return static_cast<int>(x) < static_cast<int>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year& x, const year& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year& x, const year& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year& x, const year& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-years
-operator-(const year& x, const year& y) NOEXCEPT
-{
-    return years{static_cast<int>(x) - static_cast<int>(y)};
-}
-
-CONSTCD11
-inline
-year
-operator+(const year& x, const years& y) NOEXCEPT
-{
-    return year{static_cast<int>(x) + y.count()};
-}
-
-CONSTCD11
-inline
-year
-operator+(const years& x, const year& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD11
-inline
-year
-operator-(const year& x, const years& y) NOEXCEPT
-{
-    return year{static_cast<int>(x) - y.count()};
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year& y)
-{
-    detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::internal);
-    os.width(4 + (y < year{0}));
-    os << static_cast<int>(y);
-    if (!y.ok())
-        os << " is not a valid year";
-    return os;
-}
-
-// weekday
-
-CONSTCD11
-inline
-unsigned char
-weekday::weekday_from_days(int z) NOEXCEPT
-{
-    return static_cast<unsigned char>(static_cast<unsigned>(
-        z >= -4 ? (z+4) % 7 : (z+5) % 7 + 6));
-}
-
-CONSTCD11
-inline
-weekday::weekday(unsigned wd) NOEXCEPT
-    : wd_(static_cast<decltype(wd_)>(wd))
-    {}
-
-CONSTCD11
-inline
-weekday::weekday(const sys_days& dp) NOEXCEPT
-    : wd_(weekday_from_days(dp.time_since_epoch().count()))
-    {}
-
-CONSTCD11
-inline
-weekday::weekday(const local_days& dp) NOEXCEPT
-    : wd_(weekday_from_days(dp.time_since_epoch().count()))
-    {}
-
-CONSTCD14 inline weekday& weekday::operator++() NOEXCEPT {*this += days{1}; return *this;}
-CONSTCD14 inline weekday weekday::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline weekday& weekday::operator--() NOEXCEPT {*this -= days{1}; return *this;}
-CONSTCD14 inline weekday weekday::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-
-CONSTCD14
-inline
-weekday&
-weekday::operator+=(const days& d) NOEXCEPT
-{
-    *this = *this + d;
-    return *this;
-}
-
-CONSTCD14
-inline
-weekday&
-weekday::operator-=(const days& d) NOEXCEPT
-{
-    *this = *this - d;
-    return *this;
-}
-
-CONSTCD11
-inline
-weekday::operator unsigned() const NOEXCEPT
-{
-    return static_cast<unsigned>(wd_);
-}
-
-CONSTCD11 inline bool weekday::ok() const NOEXCEPT {return wd_ <= 6;}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday& x, const weekday& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday& x, const weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD14
-inline
-days
-operator-(const weekday& x, const weekday& y) NOEXCEPT
-{
-    auto const diff = static_cast<unsigned>(x) - static_cast<unsigned>(y);
-    return days{diff <= 6 ? diff : diff + 7};
-}
-
-CONSTCD14
-inline
-weekday
-operator+(const weekday& x, const days& y) NOEXCEPT
-{
-    auto const wdu = static_cast<long long>(static_cast<unsigned>(x)) + y.count();
-    auto const wk = (wdu >= 0 ? wdu : wdu-6) / 7;
-    return weekday{static_cast<unsigned>(wdu - wk * 7)};
-}
-
-CONSTCD14
-inline
-weekday
-operator+(const days& x, const weekday& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD14
-inline
-weekday
-operator-(const weekday& x, const days& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday& wd)
-{
-    if (wd.ok())
-    {
-        CharT fmt[] = {'%', 'a', 0};
-        os << format(fmt, wd);
-    }
-    else
-        os << static_cast<unsigned>(wd) << " is not a valid weekday";
-    return os;
-}
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-inline namespace literals
-{
-
-CONSTCD11
-inline
-date::day
-operator "" _d(unsigned long long d) NOEXCEPT
-{
-    return date::day{static_cast<unsigned>(d)};
-}
-
-CONSTCD11
-inline
-date::year
-operator "" _y(unsigned long long y) NOEXCEPT
-{
-    return date::year(static_cast<int>(y));
-}
-#endif  // !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-CONSTDATA date::last_spec last{};
-
-CONSTDATA date::month jan{1};
-CONSTDATA date::month feb{2};
-CONSTDATA date::month mar{3};
-CONSTDATA date::month apr{4};
-CONSTDATA date::month may{5};
-CONSTDATA date::month jun{6};
-CONSTDATA date::month jul{7};
-CONSTDATA date::month aug{8};
-CONSTDATA date::month sep{9};
-CONSTDATA date::month oct{10};
-CONSTDATA date::month nov{11};
-CONSTDATA date::month dec{12};
-
-CONSTDATA date::weekday sun{0u};
-CONSTDATA date::weekday mon{1u};
-CONSTDATA date::weekday tue{2u};
-CONSTDATA date::weekday wed{3u};
-CONSTDATA date::weekday thu{4u};
-CONSTDATA date::weekday fri{5u};
-CONSTDATA date::weekday sat{6u};
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-}  // inline namespace literals
-#endif
-
-CONSTDATA date::month January{1};
-CONSTDATA date::month February{2};
-CONSTDATA date::month March{3};
-CONSTDATA date::month April{4};
-CONSTDATA date::month May{5};
-CONSTDATA date::month June{6};
-CONSTDATA date::month July{7};
-CONSTDATA date::month August{8};
-CONSTDATA date::month September{9};
-CONSTDATA date::month October{10};
-CONSTDATA date::month November{11};
-CONSTDATA date::month December{12};
-
-CONSTDATA date::weekday Sunday{0u};
-CONSTDATA date::weekday Monday{1u};
-CONSTDATA date::weekday Tuesday{2u};
-CONSTDATA date::weekday Wednesday{3u};
-CONSTDATA date::weekday Thursday{4u};
-CONSTDATA date::weekday Friday{5u};
-CONSTDATA date::weekday Saturday{6u};
-
-// weekday_indexed
-
-CONSTCD11
-inline
-weekday
-weekday_indexed::weekday() const NOEXCEPT
-{
-    return date::weekday{static_cast<unsigned>(wd_)};
-}
-
-CONSTCD11 inline unsigned weekday_indexed::index() const NOEXCEPT {return index_;}
-
-CONSTCD11
-inline
-bool
-weekday_indexed::ok() const NOEXCEPT
-{
-    return weekday().ok() && 1 <= index_ && index_ <= 5;
-}
-
-#ifdef __GNUC__
-#  pragma GCC diagnostic push
-#  pragma GCC diagnostic ignored "-Wconversion"
-#endif  // __GNUC__
-
-CONSTCD11
-inline
-weekday_indexed::weekday_indexed(const date::weekday& wd, unsigned index) NOEXCEPT
-    : wd_(static_cast<decltype(wd_)>(static_cast<unsigned>(wd)))
-    , index_(static_cast<decltype(index_)>(index))
-    {}
-
-#ifdef __GNUC__
-#  pragma GCC diagnostic pop
-#endif  // __GNUC__
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_indexed& wdi)
-{
-    os << wdi.weekday() << '[' << wdi.index();
-    if (!(1 <= wdi.index() && wdi.index() <= 5))
-        os << " is not a valid index";
-    os << ']';
-    return os;
-}
-
-CONSTCD11
-inline
-weekday_indexed
-weekday::operator[](unsigned index) const NOEXCEPT
-{
-    return {*this, index};
-}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT
-{
-    return x.weekday() == y.weekday() && x.index() == y.index();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-// weekday_last
-
-CONSTCD11 inline date::weekday weekday_last::weekday() const NOEXCEPT {return wd_;}
-CONSTCD11 inline bool weekday_last::ok() const NOEXCEPT {return wd_.ok();}
-CONSTCD11 inline weekday_last::weekday_last(const date::weekday& wd) NOEXCEPT : wd_(wd) {}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday_last& x, const weekday_last& y) NOEXCEPT
-{
-    return x.weekday() == y.weekday();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday_last& x, const weekday_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_last& wdl)
-{
-    return os << wdl.weekday() << "[last]";
-}
-
-CONSTCD11
-inline
-weekday_last
-weekday::operator[](last_spec) const NOEXCEPT
-{
-    return weekday_last{*this};
-}
-
-// year_month
-
-CONSTCD11
-inline
-year_month::year_month(const date::year& y, const date::month& m) NOEXCEPT
-    : y_(y)
-    , m_(m)
-    {}
-
-CONSTCD11 inline year year_month::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline bool year_month::ok() const NOEXCEPT {return y_.ok() && m_.ok();}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator+=(const months& dm) NOEXCEPT
-{
-    *this = *this + dm;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator-=(const months& dm) NOEXCEPT
-{
-    *this = *this - dm;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator+=(const years& dy) NOEXCEPT
-{
-    *this = *this + dy;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator-=(const years& dy) NOEXCEPT
-{
-    *this = *this - dy;
-    return *this;
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.month() < y.month()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD14
-inline
-year_month
-operator+(const year_month& ym, const months& dm) NOEXCEPT
-{
-    auto dmi = static_cast<int>(static_cast<unsigned>(ym.month())) - 1 + dm.count();
-    auto dy = (dmi >= 0 ? dmi : dmi-11) / 12;
-    dmi = dmi - dy * 12 + 1;
-    return (ym.year() + years(dy)) / month(static_cast<unsigned>(dmi));
-}
-
-CONSTCD14
-inline
-year_month
-operator+(const months& dm, const year_month& ym) NOEXCEPT
-{
-    return ym + dm;
-}
-
-CONSTCD14
-inline
-year_month
-operator-(const year_month& ym, const months& dm) NOEXCEPT
-{
-    return ym + -dm;
-}
-
-CONSTCD11
-inline
-months
-operator-(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return (x.year() - y.year()) +
-            months(static_cast<unsigned>(x.month()) - static_cast<unsigned>(y.month()));
-}
-
-CONSTCD11
-inline
-year_month
-operator+(const year_month& ym, const years& dy) NOEXCEPT
-{
-    return (ym.year() + dy) / ym.month();
-}
-
-CONSTCD11
-inline
-year_month
-operator+(const years& dy, const year_month& ym) NOEXCEPT
-{
-    return ym + dy;
-}
-
-CONSTCD11
-inline
-year_month
-operator-(const year_month& ym, const years& dy) NOEXCEPT
-{
-    return ym + -dy;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month& ym)
-{
-    return os << ym.year() << '/' << ym.month();
-}
-
-// month_day
-
-CONSTCD11
-inline
-month_day::month_day(const date::month& m, const date::day& d) NOEXCEPT
-    : m_(m)
-    , d_(d)
-    {}
-
-CONSTCD11 inline date::month month_day::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline date::day month_day::day() const NOEXCEPT {return d_;}
-
-CONSTCD14
-inline
-bool
-month_day::ok() const NOEXCEPT
-{
-    CONSTDATA date::day d[] =
-    {
-        date::day(31), date::day(29), date::day(31),
-        date::day(30), date::day(31), date::day(30),
-        date::day(31), date::day(31), date::day(30),
-        date::day(31), date::day(30), date::day(31)
-    };
-    return m_.ok() && date::day{1} <= d_ && d_ <= d[static_cast<unsigned>(m_)-1];
-}
-
-CONSTCD11
-inline
-bool
-operator==(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return x.month() == y.month() && x.day() == y.day();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return x.month() < y.month() ? true
-        : (x.month() > y.month() ? false
-        : (x.day() < y.day()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day& md)
-{
-    return os << md.month() << '/' << md.day();
-}
-
-// month_day_last
-
-CONSTCD11 inline month month_day_last::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline bool month_day_last::ok() const NOEXCEPT {return m_.ok();}
-CONSTCD11 inline month_day_last::month_day_last(const date::month& m) NOEXCEPT : m_(m) {}
-
-CONSTCD11
-inline
-bool
-operator==(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return x.month() == y.month();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return x.month() < y.month();
-}
-
-CONSTCD11
-inline
-bool
-operator>(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day_last& mdl)
-{
-    return os << mdl.month() << "/last";
-}
-
-// month_weekday
-
-CONSTCD11
-inline
-month_weekday::month_weekday(const date::month& m,
-                             const date::weekday_indexed& wdi) NOEXCEPT
-    : m_(m)
-    , wdi_(wdi)
-    {}
-
-CONSTCD11 inline month month_weekday::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday_indexed
-month_weekday::weekday_indexed() const NOEXCEPT
-{
-    return wdi_;
-}
-
-CONSTCD11
-inline
-bool
-month_weekday::ok() const NOEXCEPT
-{
-    return m_.ok() && wdi_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const month_weekday& x, const month_weekday& y) NOEXCEPT
-{
-    return x.month() == y.month() && x.weekday_indexed() == y.weekday_indexed();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_weekday& x, const month_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday& mwd)
-{
-    return os << mwd.month() << '/' << mwd.weekday_indexed();
-}
-
-// month_weekday_last
-
-CONSTCD11
-inline
-month_weekday_last::month_weekday_last(const date::month& m,
-                                       const date::weekday_last& wdl) NOEXCEPT
-    : m_(m)
-    , wdl_(wdl)
-    {}
-
-CONSTCD11 inline month month_weekday_last::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday_last
-month_weekday_last::weekday_last() const NOEXCEPT
-{
-    return wdl_;
-}
-
-CONSTCD11
-inline
-bool
-month_weekday_last::ok() const NOEXCEPT
-{
-    return m_.ok() && wdl_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT
-{
-    return x.month() == y.month() && x.weekday_last() == y.weekday_last();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday_last& mwdl)
-{
-    return os << mwdl.month() << '/' << mwdl.weekday_last();
-}
-
-// year_month_day_last
-
-CONSTCD11
-inline
-year_month_day_last::year_month_day_last(const date::year& y,
-                                         const date::month_day_last& mdl) NOEXCEPT
-    : y_(y)
-    , mdl_(mdl)
-    {}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_month_day_last::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_day_last::month() const NOEXCEPT {return mdl_.month();}
-
-CONSTCD11
-inline
-month_day_last
-year_month_day_last::month_day_last() const NOEXCEPT
-{
-    return mdl_;
-}
-
-CONSTCD14
-inline
-day
-year_month_day_last::day() const NOEXCEPT
-{
-    CONSTDATA date::day d[] =
-    {
-        date::day(31), date::day(28), date::day(31),
-        date::day(30), date::day(31), date::day(30),
-        date::day(31), date::day(31), date::day(30),
-        date::day(31), date::day(30), date::day(31)
-    };
-    return month() != feb || !y_.is_leap() ?
-        d[static_cast<unsigned>(month()) - 1] : date::day{29};
-}
-
-CONSTCD14
-inline
-year_month_day_last::operator sys_days() const NOEXCEPT
-{
-    return sys_days(year()/month()/day());
-}
-
-CONSTCD14
-inline
-year_month_day_last::operator local_days() const NOEXCEPT
-{
-    return local_days(year()/month()/day());
-}
-
-CONSTCD11
-inline
-bool
-year_month_day_last::ok() const NOEXCEPT
-{
-    return y_.ok() && mdl_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month_day_last() == y.month_day_last();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.month_day_last() < y.month_day_last()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day_last& ymdl)
-{
-    return os << ymdl.year() << '/' << ymdl.month_day_last();
-}
-
-CONSTCD14
-inline
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const months& dm) NOEXCEPT
-{
-    return (ymdl.year() / ymdl.month() + dm) / last;
-}
-
-CONSTCD14
-inline
-year_month_day_last
-operator+(const months& dm, const year_month_day_last& ymdl) NOEXCEPT
-{
-    return ymdl + dm;
-}
-
-CONSTCD14
-inline
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const months& dm) NOEXCEPT
-{
-    return ymdl + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const years& dy) NOEXCEPT
-{
-    return {ymdl.year()+dy, ymdl.month_day_last()};
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator+(const years& dy, const year_month_day_last& ymdl) NOEXCEPT
-{
-    return ymdl + dy;
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const years& dy) NOEXCEPT
-{
-    return ymdl + (-dy);
-}
-
-// year_month_day
-
-CONSTCD11
-inline
-year_month_day::year_month_day(const date::year& y, const date::month& m,
-                               const date::day& d) NOEXCEPT
-    : y_(y)
-    , m_(m)
-    , d_(d)
-    {}
-
-CONSTCD14
-inline
-year_month_day::year_month_day(const year_month_day_last& ymdl) NOEXCEPT
-    : y_(ymdl.year())
-    , m_(ymdl.month())
-    , d_(ymdl.day())
-    {}
-
-CONSTCD14
-inline
-year_month_day::year_month_day(sys_days dp) NOEXCEPT
-    : year_month_day(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_month_day::year_month_day(local_days dp) NOEXCEPT
-    : year_month_day(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD11 inline year year_month_day::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_day::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline day year_month_day::day() const NOEXCEPT {return d_;}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD14
-inline
-days
-year_month_day::to_days() const NOEXCEPT
-{
-    static_assert(std::numeric_limits<unsigned>::digits >= 18,
-             "This algorithm has not been ported to a 16 bit unsigned integer");
-    static_assert(std::numeric_limits<int>::digits >= 20,
-             "This algorithm has not been ported to a 16 bit signed integer");
-    auto const y = static_cast<int>(y_) - (m_ <= feb);
-    auto const m = static_cast<unsigned>(m_);
-    auto const d = static_cast<unsigned>(d_);
-    auto const era = (y >= 0 ? y : y-399) / 400;
-    auto const yoe = static_cast<unsigned>(y - era * 400);       // [0, 399]
-    auto const doy = (153*(m > 2 ? m-3 : m+9) + 2)/5 + d-1;      // [0, 365]
-    auto const doe = yoe * 365 + yoe/4 - yoe/100 + doy;          // [0, 146096]
-    return days{era * 146097 + static_cast<int>(doe) - 719468};
-}
-
-CONSTCD14
-inline
-year_month_day::operator sys_days() const NOEXCEPT
-{
-    return sys_days{to_days()};
-}
-
-CONSTCD14
-inline
-year_month_day::operator local_days() const NOEXCEPT
-{
-    return local_days{to_days()};
-}
-
-CONSTCD14
-inline
-bool
-year_month_day::ok() const NOEXCEPT
-{
-    if (!(y_.ok() && m_.ok()))
-        return false;
-    return date::day{1} <= d_ && d_ <= (y_ / m_ / last).day();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month() && x.day() == y.day();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.month() < y.month() ? true
-        : (x.month() > y.month() ? false
-        : (x.day() < y.day()))));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day& ymd)
-{
-    detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::right);
-    os << ymd.year() << '-';
-    os.width(2);
-    os << static_cast<unsigned>(ymd.month()) << '-';
-    os << ymd.day();
-    if (!ymd.ok())
-        os << " is not a valid date";
-    return os;
-}
-
-CONSTCD14
-inline
-year_month_day
-year_month_day::from_days(days dp) NOEXCEPT
-{
-    static_assert(std::numeric_limits<unsigned>::digits >= 18,
-             "This algorithm has not been ported to a 16 bit unsigned integer");
-    static_assert(std::numeric_limits<int>::digits >= 20,
-             "This algorithm has not been ported to a 16 bit signed integer");
-    auto const z = dp.count() + 719468;
-    auto const era = (z >= 0 ? z : z - 146096) / 146097;
-    auto const doe = static_cast<unsigned>(z - era * 146097);          // [0, 146096]
-    auto const yoe = (doe - doe/1460 + doe/36524 - doe/146096) / 365;  // [0, 399]
-    auto const y = static_cast<days::rep>(yoe) + era * 400;
-    auto const doy = doe - (365*yoe + yoe/4 - yoe/100);                // [0, 365]
-    auto const mp = (5*doy + 2)/153;                                   // [0, 11]
-    auto const d = doy - (153*mp+2)/5 + 1;                             // [1, 31]
-    auto const m = mp < 10 ? mp+3 : mp-9;                              // [1, 12]
-    return year_month_day{date::year{y + (m <= 2)}, date::month(m), date::day(d)};
-}
-
-CONSTCD14
-inline
-year_month_day
-operator+(const year_month_day& ymd, const months& dm) NOEXCEPT
-{
-    return (ymd.year() / ymd.month() + dm) / ymd.day();
-}
-
-CONSTCD14
-inline
-year_month_day
-operator+(const months& dm, const year_month_day& ymd) NOEXCEPT
-{
-    return ymd + dm;
-}
-
-CONSTCD14
-inline
-year_month_day
-operator-(const year_month_day& ymd, const months& dm) NOEXCEPT
-{
-    return ymd + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_day
-operator+(const year_month_day& ymd, const years& dy) NOEXCEPT
-{
-    return (ymd.year() + dy) / ymd.month() / ymd.day();
-}
-
-CONSTCD11
-inline
-year_month_day
-operator+(const years& dy, const year_month_day& ymd) NOEXCEPT
-{
-    return ymd + dy;
-}
-
-CONSTCD11
-inline
-year_month_day
-operator-(const year_month_day& ymd, const years& dy) NOEXCEPT
-{
-    return ymd + (-dy);
-}
-
-// year_month_weekday
-
-CONSTCD11
-inline
-year_month_weekday::year_month_weekday(const date::year& y, const date::month& m,
-                                       const date::weekday_indexed& wdi)
-        NOEXCEPT
-    : y_(y)
-    , m_(m)
-    , wdi_(wdi)
-    {}
-
-CONSTCD14
-inline
-year_month_weekday::year_month_weekday(const sys_days& dp) NOEXCEPT
-    : year_month_weekday(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_month_weekday::year_month_weekday(const local_days& dp) NOEXCEPT
-    : year_month_weekday(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_month_weekday::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_weekday::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday
-year_month_weekday::weekday() const NOEXCEPT
-{
-    return wdi_.weekday();
-}
-
-CONSTCD11
-inline
-unsigned
-year_month_weekday::index() const NOEXCEPT
-{
-    return wdi_.index();
-}
-
-CONSTCD11
-inline
-weekday_indexed
-year_month_weekday::weekday_indexed() const NOEXCEPT
-{
-    return wdi_;
-}
-
-CONSTCD14
-inline
-year_month_weekday::operator sys_days() const NOEXCEPT
-{
-    return sys_days{to_days()};
-}
-
-CONSTCD14
-inline
-year_month_weekday::operator local_days() const NOEXCEPT
-{
-    return local_days{to_days()};
-}
-
-CONSTCD14
-inline
-bool
-year_month_weekday::ok() const NOEXCEPT
-{
-    if (!y_.ok() || !m_.ok() || !wdi_.weekday().ok() || wdi_.index() < 1)
-        return false;
-    if (wdi_.index() <= 4)
-        return true;
-    auto d2 = wdi_.weekday() - date::weekday(static_cast<sys_days>(y_/m_/1)) + days((wdi_.index()-1)*7 + 1);
-    return static_cast<unsigned>(d2.count()) <= static_cast<unsigned>((y_/m_/last).day());
-}
-
-CONSTCD14
-inline
-year_month_weekday
-year_month_weekday::from_days(days d) NOEXCEPT
-{
-    sys_days dp{d};
-    auto const wd = date::weekday(dp);
-    auto const ymd = year_month_day(dp);
-    return {ymd.year(), ymd.month(), wd[(static_cast<unsigned>(ymd.day())-1)/7+1]};
-}
-
-CONSTCD14
-inline
-days
-year_month_weekday::to_days() const NOEXCEPT
-{
-    auto d = sys_days(y_/m_/1);
-    return (d + (wdi_.weekday() - date::weekday(d) + days{(wdi_.index()-1)*7})
-           ).time_since_epoch();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month() &&
-           x.weekday_indexed() == y.weekday_indexed();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday& ymwdi)
-{
-    return os << ymwdi.year() << '/' << ymwdi.month()
-              << '/' << ymwdi.weekday_indexed();
-}
-
-CONSTCD14
-inline
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const months& dm) NOEXCEPT
-{
-    return (ymwd.year() / ymwd.month() + dm) / ymwd.weekday_indexed();
-}
-
-CONSTCD14
-inline
-year_month_weekday
-operator+(const months& dm, const year_month_weekday& ymwd) NOEXCEPT
-{
-    return ymwd + dm;
-}
-
-CONSTCD14
-inline
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const months& dm) NOEXCEPT
-{
-    return ymwd + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const years& dy) NOEXCEPT
-{
-    return {ymwd.year()+dy, ymwd.month(), ymwd.weekday_indexed()};
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator+(const years& dy, const year_month_weekday& ymwd) NOEXCEPT
-{
-    return ymwd + dy;
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const years& dy) NOEXCEPT
-{
-    return ymwd + (-dy);
-}
-
-// year_month_weekday_last
-
-CONSTCD11
-inline
-year_month_weekday_last::year_month_weekday_last(const date::year& y,
-                                                 const date::month& m,
-                                                 const date::weekday_last& wdl) NOEXCEPT
-    : y_(y)
-    , m_(m)
-    , wdl_(wdl)
-    {}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_month_weekday_last::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_weekday_last::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday
-year_month_weekday_last::weekday() const NOEXCEPT
-{
-    return wdl_.weekday();
-}
-
-CONSTCD11
-inline
-weekday_last
-year_month_weekday_last::weekday_last() const NOEXCEPT
-{
-    return wdl_;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last::operator sys_days() const NOEXCEPT
-{
-    return sys_days{to_days()};
-}
-
-CONSTCD14
-inline
-year_month_weekday_last::operator local_days() const NOEXCEPT
-{
-    return local_days{to_days()};
-}
-
-CONSTCD11
-inline
-bool
-year_month_weekday_last::ok() const NOEXCEPT
-{
-    return y_.ok() && m_.ok() && wdl_.ok();
-}
-
-CONSTCD14
-inline
-days
-year_month_weekday_last::to_days() const NOEXCEPT
-{
-    auto const d = sys_days(y_/m_/last);
-    return (d - (date::weekday{d} - wdl_.weekday())).time_since_epoch();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month() &&
-           x.weekday_last() == y.weekday_last();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday_last& ymwdl)
-{
-    return os << ymwdl.year() << '/' << ymwdl.month() << '/' << ymwdl.weekday_last();
-}
-
-CONSTCD14
-inline
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT
-{
-    return (ymwdl.year() / ymwdl.month() + dm) / ymwdl.weekday_last();
-}
-
-CONSTCD14
-inline
-year_month_weekday_last
-operator+(const months& dm, const year_month_weekday_last& ymwdl) NOEXCEPT
-{
-    return ymwdl + dm;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT
-{
-    return ymwdl + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT
-{
-    return {ymwdl.year()+dy, ymwdl.month(), ymwdl.weekday_last()};
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator+(const years& dy, const year_month_weekday_last& ymwdl) NOEXCEPT
-{
-    return ymwdl + dy;
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT
-{
-    return ymwdl + (-dy);
-}
-
-// year_month from operator/()
-
-CONSTCD11
-inline
-year_month
-operator/(const year& y, const month& m) NOEXCEPT
-{
-    return {y, m};
-}
-
-CONSTCD11
-inline
-year_month
-operator/(const year& y, int   m) NOEXCEPT
-{
-    return y / month(static_cast<unsigned>(m));
-}
-
-// month_day from operator/()
-
-CONSTCD11
-inline
-month_day
-operator/(const month& m, const day& d) NOEXCEPT
-{
-    return {m, d};
-}
-
-CONSTCD11
-inline
-month_day
-operator/(const day& d, const month& m) NOEXCEPT
-{
-    return m / d;
-}
-
-CONSTCD11
-inline
-month_day
-operator/(const month& m, int d) NOEXCEPT
-{
-    return m / day(static_cast<unsigned>(d));
-}
-
-CONSTCD11
-inline
-month_day
-operator/(int m, const day& d) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m)) / d;
-}
-
-CONSTCD11 inline month_day operator/(const day& d, int m) NOEXCEPT {return m / d;}
-
-// month_day_last from operator/()
-
-CONSTCD11
-inline
-month_day_last
-operator/(const month& m, last_spec) NOEXCEPT
-{
-    return month_day_last{m};
-}
-
-CONSTCD11
-inline
-month_day_last
-operator/(last_spec, const month& m) NOEXCEPT
-{
-    return m/last;
-}
-
-CONSTCD11
-inline
-month_day_last
-operator/(int m, last_spec) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m))/last;
-}
-
-CONSTCD11
-inline
-month_day_last
-operator/(last_spec, int m) NOEXCEPT
-{
-    return m/last;
-}
-
-// month_weekday from operator/()
-
-CONSTCD11
-inline
-month_weekday
-operator/(const month& m, const weekday_indexed& wdi) NOEXCEPT
-{
-    return {m, wdi};
-}
-
-CONSTCD11
-inline
-month_weekday
-operator/(const weekday_indexed& wdi, const month& m) NOEXCEPT
-{
-    return m / wdi;
-}
-
-CONSTCD11
-inline
-month_weekday
-operator/(int m, const weekday_indexed& wdi) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m)) / wdi;
-}
-
-CONSTCD11
-inline
-month_weekday
-operator/(const weekday_indexed& wdi, int m) NOEXCEPT
-{
-    return m / wdi;
-}
-
-// month_weekday_last from operator/()
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(const month& m, const weekday_last& wdl) NOEXCEPT
-{
-    return {m, wdl};
-}
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(const weekday_last& wdl, const month& m) NOEXCEPT
-{
-    return m / wdl;
-}
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(int m, const weekday_last& wdl) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m)) / wdl;
-}
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(const weekday_last& wdl, int m) NOEXCEPT
-{
-    return m / wdl;
-}
-
-// year_month_day from operator/()
-
-CONSTCD11
-inline
-year_month_day
-operator/(const year_month& ym, const day& d) NOEXCEPT
-{
-    return {ym.year(), ym.month(), d};
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const year_month& ym, int d)  NOEXCEPT
-{
-    return ym / day(static_cast<unsigned>(d));
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const year& y, const month_day& md) NOEXCEPT
-{
-    return y / md.month() / md.day();
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(int y, const month_day& md) NOEXCEPT
-{
-    return year(y) / md;
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const month_day& md, const year& y)  NOEXCEPT
-{
-    return y / md;
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const month_day& md, int y) NOEXCEPT
-{
-    return year(y) / md;
-}
-
-// year_month_day_last from operator/()
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const year_month& ym, last_spec) NOEXCEPT
-{
-    return {ym.year(), month_day_last{ym.month()}};
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const year& y, const month_day_last& mdl) NOEXCEPT
-{
-    return {y, mdl};
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(int y, const month_day_last& mdl) NOEXCEPT
-{
-    return year(y) / mdl;
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const month_day_last& mdl, const year& y) NOEXCEPT
-{
-    return y / mdl;
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const month_day_last& mdl, int y) NOEXCEPT
-{
-    return year(y) / mdl;
-}
-
-// year_month_weekday from operator/()
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const year_month& ym, const weekday_indexed& wdi) NOEXCEPT
-{
-    return {ym.year(), ym.month(), wdi};
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const year& y, const month_weekday& mwd) NOEXCEPT
-{
-    return {y, mwd.month(), mwd.weekday_indexed()};
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(int y, const month_weekday& mwd) NOEXCEPT
-{
-    return year(y) / mwd;
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const month_weekday& mwd, const year& y) NOEXCEPT
-{
-    return y / mwd;
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const month_weekday& mwd, int y) NOEXCEPT
-{
-    return year(y) / mwd;
-}
-
-// year_month_weekday_last from operator/()
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const year_month& ym, const weekday_last& wdl) NOEXCEPT
-{
-    return {ym.year(), ym.month(), wdl};
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const year& y, const month_weekday_last& mwdl) NOEXCEPT
-{
-    return {y, mwdl.month(), mwdl.weekday_last()};
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(int y, const month_weekday_last& mwdl) NOEXCEPT
-{
-    return year(y) / mwdl;
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, const year& y) NOEXCEPT
-{
-    return y / mwdl;
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, int y) NOEXCEPT
-{
-    return year(y) / mwdl;
-}
-
-template <class Duration>
-struct fields;
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const fields<Duration>& fds, const std::string* abbrev = nullptr,
-          const std::chrono::seconds* offset_sec = nullptr);
-
-template <class CharT, class Traits, class Duration, class Alloc>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-            fields<Duration>& fds, std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr);
-
-// time_of_day
-
-enum {am = 1, pm};
-
-namespace detail
-{
-
-// width<n>::value is the number of fractional decimal digits in 1/n
-// width<0>::value and width<1>::value are defined to be 0
-// If 1/n takes more than 18 fractional decimal digits,
-//   the result is truncated to 19.
-// Example:  width<2>::value    ==  1
-// Example:  width<3>::value    == 19
-// Example:  width<4>::value    ==  2
-// Example:  width<10>::value   ==  1
-// Example:  width<1000>::value ==  3
-template <std::uint64_t n, std::uint64_t d = 10, unsigned w = 0,
-          bool should_continue = !(n < 2) && d != 0 && (w < 19)>
-struct width
-{
-    static CONSTDATA unsigned value = 1 + width<n, d%n*10, w+1>::value;
-};
-
-template <std::uint64_t n, std::uint64_t d, unsigned w>
-struct width<n, d, w, false>
-{
-    static CONSTDATA unsigned value = 0;
-};
-
-template <unsigned exp>
-struct static_pow10
-{
-private:
-    static CONSTDATA std::uint64_t h = static_pow10<exp/2>::value;
-public:
-    static CONSTDATA std::uint64_t value = h * h * (exp % 2 ? 10 : 1);
-};
-
-template <>
-struct static_pow10<0>
-{
-    static CONSTDATA std::uint64_t value = 1;
-};
-
-template <class Rep, unsigned w, bool in_range = (w < 19)>
-struct make_precision
-{
-    using type = std::chrono::duration<Rep,
-                                       std::ratio<1, static_pow10<w>::value>>;
-    static CONSTDATA unsigned width = w;
-};
-
-template <class Rep, unsigned w>
-struct make_precision<Rep, w, false>
-{
-    using type = std::chrono::duration<Rep, std::micro>;
-    static CONSTDATA unsigned width = 6;
-};
-
-template <class Duration,
-          unsigned w = width<std::common_type<
-                                 Duration,
-                                 std::chrono::seconds>::type::period::den>::value>
-class decimal_format_seconds
-{
-public:
-    using rep = typename std::common_type<Duration, std::chrono::seconds>::type::rep;
-    using precision = typename make_precision<rep, w>::type;
-    static auto CONSTDATA width = make_precision<rep, w>::width;
-
-private:
-    std::chrono::seconds s_;
-    precision            sub_s_;
-
-public:
-    CONSTCD11 decimal_format_seconds()
-        : s_()
-        , sub_s_()
-        {}
-
-    CONSTCD11 explicit decimal_format_seconds(const Duration& d) NOEXCEPT
-        : s_(std::chrono::duration_cast<std::chrono::seconds>(d))
-        , sub_s_(std::chrono::duration_cast<precision>(d - s_))
-        {}
-
-    CONSTCD14 std::chrono::seconds& seconds() NOEXCEPT {return s_;}
-    CONSTCD11 std::chrono::seconds seconds() const NOEXCEPT {return s_;}
-    CONSTCD11 precision subseconds() const NOEXCEPT {return sub_s_;}
-
-    CONSTCD14 precision to_duration() const NOEXCEPT
-    {
-        return s_ + sub_s_;
-    }
-
-    CONSTCD11 bool in_conventional_range() const NOEXCEPT
-    {
-        using namespace std::chrono;
-        return sub_s_ < std::chrono::seconds{1} && s_ < minutes{1};
-    }
-
-    template <class CharT, class Traits>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    operator<<(std::basic_ostream<CharT, Traits>& os, const decimal_format_seconds& x)
-    {
-        date::detail::save_stream<CharT, Traits> _(os);
-        os.fill('0');
-        os.flags(std::ios::dec | std::ios::right);
-        os.width(2);
-        os << x.s_.count() <<
-              std::use_facet<std::numpunct<char>>(os.getloc()).decimal_point();
-        os.width(width);
-        os << static_cast<std::int64_t>(x.sub_s_.count());
-        return os;
-    }
-};
-
-template <class Duration>
-class decimal_format_seconds<Duration, 0>
-{
-    static CONSTDATA unsigned w = 0;
-public:
-    using rep = typename std::common_type<Duration, std::chrono::seconds>::type::rep;
-    using precision = std::chrono::duration<rep>;
-    static auto CONSTDATA width = make_precision<rep, w>::width;
-private:
-
-    std::chrono::seconds s_;
-
-public:
-    CONSTCD11 decimal_format_seconds() : s_() {}
-    CONSTCD11 explicit decimal_format_seconds(const precision& s) NOEXCEPT
-        : s_(s)
-        {}
-
-    CONSTCD14 std::chrono::seconds& seconds() NOEXCEPT {return s_;}
-    CONSTCD11 std::chrono::seconds seconds() const NOEXCEPT {return s_;}
-    CONSTCD14 precision to_duration() const NOEXCEPT {return s_;}
-
-    CONSTCD11 bool in_conventional_range() const NOEXCEPT
-    {
-        using namespace std::chrono;
-        return s_ < minutes{1};
-    }
-
-    template <class CharT, class Traits>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    operator<<(std::basic_ostream<CharT, Traits>& os, const decimal_format_seconds& x)
-    {
-        date::detail::save_stream<CharT, Traits> _(os);
-        os.fill('0');
-        os.flags(std::ios::dec | std::ios::right);
-        os.width(2);
-        os << x.s_.count();
-        return os;
-    }
-};
-
-enum class classify
-{
-    not_valid,
-    hour,
-    minute,
-    second,
-    subsecond
-};
-
-template <class Duration>
-struct classify_duration
-{
-    static CONSTDATA classify value =
-        std::is_convertible<Duration, std::chrono::hours>::value
-                ? classify::hour :
-        std::is_convertible<Duration, std::chrono::minutes>::value
-                ? classify::minute :
-        std::is_convertible<Duration, std::chrono::seconds>::value
-                ? classify::second :
-        std::chrono::treat_as_floating_point<typename Duration::rep>::value
-                ? classify::not_valid :
-                classify::subsecond;
-};
-
-template <class Rep, class Period>
-inline
-CONSTCD11
-typename std::enable_if
-         <
-            std::numeric_limits<Rep>::is_signed,
-            std::chrono::duration<Rep, Period>
-         >::type
-abs(std::chrono::duration<Rep, Period> d)
-{
-    return d >= d.zero() ? d : -d;
-}
-
-template <class Rep, class Period>
-inline
-CONSTCD11
-typename std::enable_if
-         <
-            !std::numeric_limits<Rep>::is_signed,
-            std::chrono::duration<Rep, Period>
-         >::type
-abs(std::chrono::duration<Rep, Period> d)
-{
-    return d;
-}
-
-class time_of_day_base
-{
-protected:
-    std::chrono::hours   h_;
-    unsigned char mode_;
-    bool          neg_;
-
-    enum {is24hr};
-
-    CONSTCD11 time_of_day_base() NOEXCEPT
-        : h_(0)
-        , mode_(static_cast<decltype(mode_)>(is24hr))
-        , neg_(false)
-        {}
-
-
-    CONSTCD11 time_of_day_base(std::chrono::hours h, bool neg, unsigned m) NOEXCEPT
-        : h_(detail::abs(h))
-        , mode_(static_cast<decltype(mode_)>(m))
-        , neg_(neg)
-        {}
-
-    CONSTCD14 void make24() NOEXCEPT;
-    CONSTCD14 void make12() NOEXCEPT;
-
-    CONSTCD14 std::chrono::hours to24hr() const;
-
-    CONSTCD11 bool in_conventional_range() const NOEXCEPT
-    {
-        return !neg_ && h_ < days{1};
-    }
-};
-
-CONSTCD14
-inline
-std::chrono::hours
-time_of_day_base::to24hr() const
-{
-    auto h = h_;
-    if (mode_ == am || mode_ == pm)
-    {
-        CONSTDATA auto h12 = std::chrono::hours(12);
-        if (mode_ == pm)
-        {
-            if (h != h12)
-                h = h + h12;
-        }
-        else if (h == h12)
-            h = std::chrono::hours(0);
-    }
-    return h;
-}
-
-CONSTCD14
-inline
-void
-time_of_day_base::make24() NOEXCEPT
-{
-    h_ = to24hr();
-    mode_ = is24hr;
-}
-
-CONSTCD14
-inline
-void
-time_of_day_base::make12() NOEXCEPT
-{
-    if (mode_ == is24hr)
-    {
-        CONSTDATA auto h12 = std::chrono::hours(12);
-        if (h_ >= h12)
-        {
-            if (h_ > h12)
-                h_ = h_ - h12;
-            mode_ = pm;
-        }
-        else
-        {
-            if (h_ == std::chrono::hours(0))
-                h_ = h12;
-            mode_ = am;
-        }
-    }
-}
-
-template <class Duration, detail::classify = detail::classify_duration<Duration>::value>
-class time_of_day_storage;
-
-template <class Rep, class Period>
-class time_of_day_storage<std::chrono::duration<Rep, Period>, detail::classify::hour>
-    : private detail::time_of_day_base
-{
-    using base = detail::time_of_day_base;
-
-public:
-    using precision = std::chrono::hours;
-
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-    CONSTCD11 time_of_day_storage() NOEXCEPT = default;
-#else
-    CONSTCD11 time_of_day_storage() = default;
-#endif /* !defined(_MSC_VER) || _MSC_VER >= 1900 */
-
-    CONSTCD11 explicit time_of_day_storage(std::chrono::hours since_midnight) NOEXCEPT
-        : base(since_midnight, since_midnight < std::chrono::hours{0}, is24hr)
-        {}
-
-    CONSTCD11 explicit time_of_day_storage(std::chrono::hours h, unsigned md) NOEXCEPT
-        : base(h, h < std::chrono::hours{0}, md)
-        {}
-
-    CONSTCD11 std::chrono::hours hours() const NOEXCEPT {return h_;}
-    CONSTCD11 unsigned mode() const NOEXCEPT {return mode_;}
-
-    CONSTCD14 explicit operator precision() const NOEXCEPT
-    {
-        auto p = to24hr();
-        if (neg_)
-            p = -p;
-        return p;
-    }
-
-    CONSTCD14 precision to_duration() const NOEXCEPT
-    {
-        return static_cast<precision>(*this);
-    }
-
-    CONSTCD14 time_of_day_storage& make24() NOEXCEPT {base::make24(); return *this;}
-    CONSTCD14 time_of_day_storage& make12() NOEXCEPT {base::make12(); return *this;}
-
-    CONSTCD11 bool in_conventional_range() const NOEXCEPT
-    {
-        return base::in_conventional_range();
-    }
-
-    template<class CharT, class Traits>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    operator<<(std::basic_ostream<CharT, Traits>& os, const time_of_day_storage& t)
-    {
-        using namespace std;
-        detail::save_stream<CharT, Traits> _(os);
-        if (t.neg_)
-            os << '-';
-        os.fill('0');
-        os.flags(std::ios::dec | std::ios::right);
-        if (t.mode_ != am && t.mode_ != pm)
-            os.width(2);
-        os << t.h_.count();
-        switch (t.mode_)
-        {
-        case time_of_day_storage::is24hr:
-            os << "00";
-            break;
-        case am:
-            os << "am";
-            break;
-        case pm:
-            os << "pm";
-            break;
-        }
-        return os;
-    }
-};
-
-template <class Rep, class Period>
-class time_of_day_storage<std::chrono::duration<Rep, Period>, detail::classify::minute>
-    : private detail::time_of_day_base
-{
-    using base = detail::time_of_day_base;
-
-    std::chrono::minutes m_;
-
-public:
-   using precision = std::chrono::minutes;
-
-   CONSTCD11 time_of_day_storage() NOEXCEPT
-        : base()
-        , m_(0)
-        {}
-
-   CONSTCD11 explicit time_of_day_storage(std::chrono::minutes since_midnight) NOEXCEPT
-        : base(std::chrono::duration_cast<std::chrono::hours>(since_midnight),
-               since_midnight < std::chrono::minutes{0}, is24hr)
-        , m_(detail::abs(since_midnight) - h_)
-        {}
-
-    CONSTCD11 explicit time_of_day_storage(std::chrono::hours h, std::chrono::minutes m,
-                                           unsigned md) NOEXCEPT
-        : base(h, false, md)
-        , m_(m)
-        {}
-
-    CONSTCD11 std::chrono::hours hours() const NOEXCEPT {return h_;}
-    CONSTCD11 std::chrono::minutes minutes() const NOEXCEPT {return m_;}
-    CONSTCD11 unsigned mode() const NOEXCEPT {return mode_;}
-
-    CONSTCD14 explicit operator precision() const NOEXCEPT
-    {
-        auto p = to24hr() + m_;
-        if (neg_)
-            p = -p;
-        return p;
-    }
-
-    CONSTCD14 precision to_duration() const NOEXCEPT
-    {
-        return static_cast<precision>(*this);
-    }
-
-    CONSTCD14 time_of_day_storage& make24() NOEXCEPT {base::make24(); return *this;}
-    CONSTCD14 time_of_day_storage& make12() NOEXCEPT {base::make12(); return *this;}
-
-    CONSTCD11 bool in_conventional_range() const NOEXCEPT
-    {
-        return base::in_conventional_range() && m_ < std::chrono::hours{1};
-    }
-
-    template<class CharT, class Traits>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    operator<<(std::basic_ostream<CharT, Traits>& os, const time_of_day_storage& t)
-    {
-        using namespace std;
-        detail::save_stream<CharT, Traits> _(os);
-        if (t.neg_)
-            os << '-';
-        os.fill('0');
-        os.flags(std::ios::dec | std::ios::right);
-        if (t.mode_ != am && t.mode_ != pm)
-            os.width(2);
-        os << t.h_.count() << ':';
-        os.width(2);
-        os << t.m_.count();
-        switch (t.mode_)
-        {
-        case am:
-            os << "am";
-            break;
-        case pm:
-            os << "pm";
-            break;
-        }
-        return os;
-    }
-};
-
-template <class Rep, class Period>
-class time_of_day_storage<std::chrono::duration<Rep, Period>, detail::classify::second>
-    : private detail::time_of_day_base
-{
-    using base = detail::time_of_day_base;
-    using dfs = decimal_format_seconds<std::chrono::seconds>;
-
-    std::chrono::minutes m_;
-    dfs                  s_;
-
-public:
-    using precision = std::chrono::seconds;
-
-    CONSTCD11 time_of_day_storage() NOEXCEPT
-        : base()
-        , m_(0)
-        , s_()
-        {}
-
-    CONSTCD11 explicit time_of_day_storage(std::chrono::seconds since_midnight) NOEXCEPT
-        : base(std::chrono::duration_cast<std::chrono::hours>(since_midnight),
-               since_midnight < std::chrono::seconds{0}, is24hr)
-        , m_(std::chrono::duration_cast<std::chrono::minutes>(detail::abs(since_midnight) - h_))
-        , s_(detail::abs(since_midnight) - h_ - m_)
-        {}
-
-    CONSTCD11 explicit time_of_day_storage(std::chrono::hours h, std::chrono::minutes m,
-                                           std::chrono::seconds s, unsigned md) NOEXCEPT
-        : base(h, false, md)
-        , m_(m)
-        , s_(s)
-        {}
-
-    CONSTCD11 std::chrono::hours hours() const NOEXCEPT {return h_;}
-    CONSTCD11 std::chrono::minutes minutes() const NOEXCEPT {return m_;}
-    CONSTCD14 std::chrono::seconds& seconds() NOEXCEPT {return s_.seconds();}
-    CONSTCD11 std::chrono::seconds seconds() const NOEXCEPT {return s_.seconds();}
-    CONSTCD11 unsigned mode() const NOEXCEPT {return mode_;}
-
-    CONSTCD14 explicit operator precision() const NOEXCEPT
-    {
-        auto p = to24hr() + s_.to_duration() + m_;
-        if (neg_)
-            p = -p;
-        return p;
-    }
-
-    CONSTCD14 precision to_duration() const NOEXCEPT
-    {
-        return static_cast<precision>(*this);
-    }
-
-    CONSTCD14 time_of_day_storage& make24() NOEXCEPT {base::make24(); return *this;}
-    CONSTCD14 time_of_day_storage& make12() NOEXCEPT {base::make12(); return *this;}
-
-    CONSTCD11 bool in_conventional_range() const NOEXCEPT
-    {
-        return base::in_conventional_range() && m_ < std::chrono::hours{1} &&
-                                                s_.in_conventional_range();
-    }
-
-    template<class CharT, class Traits>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    operator<<(std::basic_ostream<CharT, Traits>& os, const time_of_day_storage& t)
-    {
-        using namespace std;
-        detail::save_stream<CharT, Traits> _(os);
-        if (t.neg_)
-            os << '-';
-        os.fill('0');
-        os.flags(std::ios::dec | std::ios::right);
-        if (t.mode_ != am && t.mode_ != pm)
-            os.width(2);
-        os << t.h_.count() << ':';
-        os.width(2);
-        os << t.m_.count() << ':' << t.s_;
-        switch (t.mode_)
-        {
-        case am:
-            os << "am";
-            break;
-        case pm:
-            os << "pm";
-            break;
-        }
-        return os;
-    }
-
-    template <class CharT, class Traits, class Duration>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    date::to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const fields<Duration>& fds, const std::string* abbrev,
-          const std::chrono::seconds* offset_sec);
-
-    template <class CharT, class Traits, class Duration, class Alloc>
-    friend
-    std::basic_istream<CharT, Traits>&
-    date::from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-          fields<Duration>& fds,
-          std::basic_string<CharT, Traits, Alloc>* abbrev, std::chrono::minutes* offset);
-};
-
-template <class Rep, class Period>
-class time_of_day_storage<std::chrono::duration<Rep, Period>, detail::classify::subsecond>
-    : private detail::time_of_day_base
-{
-public:
-    using Duration = std::chrono::duration<Rep, Period>;
-    using dfs = decimal_format_seconds<typename std::common_type<Duration,
-                                       std::chrono::seconds>::type>;
-    using precision = typename dfs::precision;
-
-private:
-    using base = detail::time_of_day_base;
-
-    std::chrono::minutes m_;
-    dfs                  s_;
-
-public:
-    CONSTCD11 time_of_day_storage() NOEXCEPT
-        : base()
-        , m_(0)
-        , s_()
-        {}
-
-    CONSTCD11 explicit time_of_day_storage(Duration since_midnight) NOEXCEPT
-        : base(date::trunc<std::chrono::hours>(since_midnight),
-               since_midnight < Duration{0}, is24hr)
-        , m_(date::trunc<std::chrono::minutes>(detail::abs(since_midnight) - h_))
-        , s_(detail::abs(since_midnight) - h_ - m_)
-        {}
-
-    CONSTCD11 explicit time_of_day_storage(std::chrono::hours h, std::chrono::minutes m,
-                                           std::chrono::seconds s, precision sub_s,
-                                           unsigned md) NOEXCEPT
-        : base(h, false, md)
-        , m_(m)
-        , s_(s + sub_s)
-        {}
-
-    CONSTCD11 std::chrono::hours hours() const NOEXCEPT {return h_;}
-    CONSTCD11 std::chrono::minutes minutes() const NOEXCEPT {return m_;}
-    CONSTCD14 std::chrono::seconds& seconds() NOEXCEPT {return s_.seconds();}
-    CONSTCD11 std::chrono::seconds seconds() const NOEXCEPT {return s_.seconds();}
-    CONSTCD11 precision subseconds() const NOEXCEPT {return s_.subseconds();}
-    CONSTCD11 unsigned mode() const NOEXCEPT {return mode_;}
-
-    CONSTCD14 explicit operator precision() const NOEXCEPT
-    {
-        auto p = to24hr() + s_.to_duration() + m_;
-        if (neg_)
-            p = -p;
-        return p;
-    }
-
-    CONSTCD14 precision to_duration() const NOEXCEPT
-    {
-        return static_cast<precision>(*this);
-    }
-
-    CONSTCD14 time_of_day_storage& make24() NOEXCEPT {base::make24(); return *this;}
-    CONSTCD14 time_of_day_storage& make12() NOEXCEPT {base::make12(); return *this;}
-
-    CONSTCD11 bool in_conventional_range() const NOEXCEPT
-    {
-        return base::in_conventional_range() && m_ < std::chrono::hours{1} &&
-                                                s_.in_conventional_range();
-    }
-
-    template<class CharT, class Traits>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    operator<<(std::basic_ostream<CharT, Traits>& os, const time_of_day_storage& t)
-    {
-        using namespace std;
-        detail::save_stream<CharT, Traits> _(os);
-        if (t.neg_)
-            os << '-';
-        os.fill('0');
-        os.flags(std::ios::dec | std::ios::right);
-        if (t.mode_ != am && t.mode_ != pm)
-            os.width(2);
-        os << t.h_.count() << ':';
-        os.width(2);
-        os << t.m_.count() << ':' << t.s_;
-        switch (t.mode_)
-        {
-        case am:
-            os << "am";
-            break;
-        case pm:
-            os << "pm";
-            break;
-        }
-        return os;
-    }
-
-    template <class CharT, class Traits, class Duration>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    date::to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const fields<Duration>& fds, const std::string* abbrev,
-          const std::chrono::seconds* offset_sec);
-
-    template <class CharT, class Traits, class Duration, class Alloc>
-    friend
-    std::basic_istream<CharT, Traits>&
-    date::from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-          fields<Duration>& fds,
-          std::basic_string<CharT, Traits, Alloc>* abbrev, std::chrono::minutes* offset);
-};
-
-}  // namespace detail
-
-template <class Duration>
-class time_of_day
-    : public detail::time_of_day_storage<Duration>
-{
-    using base = detail::time_of_day_storage<Duration>;
-public:
-#if !defined(_MSC_VER) || _MSC_VER >= 1900
-    CONSTCD11 time_of_day() NOEXCEPT = default;
-#else
-    CONSTCD11 time_of_day() = default;
-#endif /* !defined(_MSC_VER) || _MSC_VER >= 1900 */
-
-    CONSTCD11 explicit time_of_day(Duration since_midnight) NOEXCEPT
-        : base(since_midnight)
-        {}
-
-    template <class Arg0, class Arg1, class ...Args>
-    CONSTCD11
-    explicit time_of_day(Arg0&& arg0, Arg1&& arg1, Args&& ...args) NOEXCEPT
-        : base(std::forward<Arg0>(arg0), std::forward<Arg1>(arg1), std::forward<Args>(args)...)
-        {}
-};
-
-template <class Rep, class Period,
-          class = typename std::enable_if
-              <!std::chrono::treat_as_floating_point<Rep>::value>::type>
-CONSTCD11
-inline
-time_of_day<std::chrono::duration<Rep, Period>>
-make_time(const std::chrono::duration<Rep, Period>& d)
-{
-    return time_of_day<std::chrono::duration<Rep, Period>>(d);
-}
-
-CONSTCD11
-inline
-time_of_day<std::chrono::hours>
-make_time(const std::chrono::hours& h, unsigned md)
-{
-    return time_of_day<std::chrono::hours>(h, md);
-}
-
-CONSTCD11
-inline
-time_of_day<std::chrono::minutes>
-make_time(const std::chrono::hours& h, const std::chrono::minutes& m,
-          unsigned md)
-{
-    return time_of_day<std::chrono::minutes>(h, m, md);
-}
-
-CONSTCD11
-inline
-time_of_day<std::chrono::seconds>
-make_time(const std::chrono::hours& h, const std::chrono::minutes& m,
-          const std::chrono::seconds& s, unsigned md)
-{
-    return time_of_day<std::chrono::seconds>(h, m, s, md);
-}
-
-template <class Rep, class Period,
-          class = typename std::enable_if<std::ratio_less<Period,
-                                                          std::ratio<1>>::value>::type>
-CONSTCD11
-inline
-time_of_day<std::chrono::duration<Rep, Period>>
-make_time(const std::chrono::hours& h, const std::chrono::minutes& m,
-          const std::chrono::seconds& s, const std::chrono::duration<Rep, Period>& sub_s,
-          unsigned md)
-{
-    return time_of_day<std::chrono::duration<Rep, Period>>(h, m, s, sub_s, md);
-}
-
-template <class CharT, class Traits, class Duration>
-inline
-typename std::enable_if
-<
-    !std::chrono::treat_as_floating_point<typename Duration::rep>::value &&
-        std::ratio_less<typename Duration::period, days::period>::value
-    , std::basic_ostream<CharT, Traits>&
->::type
-operator<<(std::basic_ostream<CharT, Traits>& os, const sys_time<Duration>& tp)
-{
-    auto const dp = date::floor<days>(tp);
-    return os << year_month_day(dp) << ' ' << make_time(tp-dp);
-}
-
-template <class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const sys_days& dp)
-{
-    return os << year_month_day(dp);
-}
-
-template <class CharT, class Traits, class Duration>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const local_time<Duration>& ut)
-{
-    return (os << sys_time<Duration>{ut.time_since_epoch()});
-}
-
-// to_stream
-
-template <class Duration>
-struct fields
-{
-    year_month_day        ymd{year{0}/0/0};
-    weekday               wd{7u};
-    time_of_day<Duration> tod{};
-
-    fields() = default;
-
-    fields(year_month_day ymd_) : ymd(ymd_) {}
-    fields(weekday wd_) : wd(wd_) {}
-    fields(time_of_day<Duration> tod_) : tod(tod_) {}
-
-    fields(year_month_day ymd_, weekday wd_) : ymd(ymd_), wd(wd_) {}
-    fields(year_month_day ymd_, time_of_day<Duration> tod_) : ymd(ymd_), tod(tod_) {}
-
-    fields(weekday wd_, time_of_day<Duration> tod_) : wd(wd_), tod(tod_) {}
-
-    fields(year_month_day ymd_, weekday wd_, time_of_day<Duration> tod_)
-        : ymd(ymd_)
-        , wd(wd_)
-        , tod(tod_)
-        {}
-};
-
-namespace detail
-{
-
-template <class CharT, class Traits, class Duration>
-unsigned
-extract_weekday(std::basic_ostream<CharT, Traits>& os, const fields<Duration>& fds)
-{
-    if (!fds.ymd.ok() && !fds.wd.ok())
-    {
-        // fds does not contain a valid weekday
-        os.setstate(std::ios::failbit);
-        return 7;
-    }
-    unsigned wd;
-    if (fds.ymd.ok())
-    {
-        wd = static_cast<unsigned>(weekday{fds.ymd});
-        if (fds.wd.ok() && wd != static_cast<unsigned>(fds.wd))
-        {
-            // fds.ymd and fds.wd are inconsistent
-            os.setstate(std::ios::failbit);
-            return 7;
-        }
-    }
-    else
-        wd = static_cast<unsigned>(fds.wd);
-    return wd;
-}
-
-template <class CharT, class Traits, class Duration>
-unsigned
-extract_month(std::basic_ostream<CharT, Traits>& os, const fields<Duration>& fds)
-{
-    if (!fds.ymd.month().ok())
-    {
-        // fds does not contain a valid month
-        os.setstate(std::ios::failbit);
-        return 0;
-    }
-    return static_cast<unsigned>(fds.ymd.month());
-}
-
-}  // namespace detail
-
-#if ONLY_C_LOCALE
-
-namespace detail
-{
-
-inline
-std::pair<const std::string*, const std::string*>
-weekday_names()
-{
-    using namespace std;
-    static const string nm[] =
-    {
-        "Sunday",
-        "Monday",
-        "Tuesday",
-        "Wednesday",
-        "Thursday",
-        "Friday",
-        "Saturday",
-        "Sun",
-        "Mon",
-        "Tue",
-        "Wed",
-        "Thu",
-        "Fri",
-        "Sat"
-    };
-    return make_pair(nm, nm+sizeof(nm)/sizeof(nm[0]));
-}
-
-inline
-std::pair<const std::string*, const std::string*>
-month_names()
-{
-    using namespace std;
-    static const string nm[] =
-    {
-        "January",
-        "February",
-        "March",
-        "April",
-        "May",
-        "June",
-        "July",
-        "August",
-        "September",
-        "October",
-        "November",
-        "December",
-        "Jan",
-        "Feb",
-        "Mar",
-        "Apr",
-        "May",
-        "Jun",
-        "Jul",
-        "Aug",
-        "Sep",
-        "Oct",
-        "Nov",
-        "Dec"
-    };
-    return make_pair(nm, nm+sizeof(nm)/sizeof(nm[0]));
-}
-
-inline
-std::pair<const std::string*, const std::string*>
-ampm_names()
-{
-    using namespace std;
-    static const string nm[] =
-    {
-        "AM",
-        "PM"
-    };
-    return make_pair(nm, nm+sizeof(nm)/sizeof(nm[0]));
-}
-
-template <class CharT, class Traits, class FwdIter>
-FwdIter
-scan_keyword(std::basic_istream<CharT, Traits>& is, FwdIter kb, FwdIter ke)
-{
-    using namespace std;
-    size_t nkw = static_cast<size_t>(std::distance(kb, ke));
-    const unsigned char doesnt_match = '\0';
-    const unsigned char might_match = '\1';
-    const unsigned char does_match = '\2';
-    unsigned char statbuf[100];
-    unsigned char* status = statbuf;
-    unique_ptr<unsigned char, void(*)(void*)> stat_hold(0, free);
-    if (nkw > sizeof(statbuf))
-    {
-        status = (unsigned char*)malloc(nkw);
-        if (status == nullptr)
-            throw bad_alloc();
-        stat_hold.reset(status);
-    }
-    size_t n_might_match = nkw;  // At this point, any keyword might match
-    size_t n_does_match = 0;     // but none of them definitely do
-    // Initialize all statuses to might_match, except for "" keywords are does_match
-    unsigned char* st = status;
-    for (auto ky = kb; ky != ke; ++ky, ++st)
-    {
-        if (!ky->empty())
-            *st = might_match;
-        else
-        {
-            *st = does_match;
-            --n_might_match;
-            ++n_does_match;
-        }
-    }
-    // While there might be a match, test keywords against the next CharT
-    for (size_t indx = 0; is && n_might_match > 0; ++indx)
-    {
-        // Peek at the next CharT but don't consume it
-        auto ic = is.peek();
-        if (ic == EOF)
-        {
-            is.setstate(ios::eofbit);
-            break;
-        }
-        auto c = static_cast<char>(toupper(ic));
-        bool consume = false;
-        // For each keyword which might match, see if the indx character is c
-        // If a match if found, consume c
-        // If a match is found, and that is the last character in the keyword,
-        //    then that keyword matches.
-        // If the keyword doesn't match this character, then change the keyword
-        //    to doesn't match
-        st = status;
-        for (auto ky = kb; ky != ke; ++ky, ++st)
-        {
-            if (*st == might_match)
-            {
-                if (c == static_cast<char>(toupper((*ky)[indx])))
-                {
-                    consume = true;
-                    if (ky->size() == indx+1)
-                    {
-                        *st = does_match;
-                        --n_might_match;
-                        ++n_does_match;
-                    }
-                }
-                else
-                {
-                    *st = doesnt_match;
-                    --n_might_match;
-                }
-            }
-        }
-        // consume if we matched a character
-        if (consume)
-        {
-            (void)is.get();
-            // If we consumed a character and there might be a matched keyword that
-            //   was marked matched on a previous iteration, then such keywords
-            //   are now marked as not matching.
-            if (n_might_match + n_does_match > 1)
-            {
-                st = status;
-                for (auto ky = kb; ky != ke; ++ky, ++st)
-                {
-                    if (*st == does_match && ky->size() != indx+1)
-                    {
-                        *st = doesnt_match;
-                        --n_does_match;
-                    }
-                }
-            }
-        }
-    }
-    // We've exited the loop because we hit eof and/or we have no more "might matches".
-    // Return the first matching result
-    for (st = status; kb != ke; ++kb, ++st)
-        if (*st == does_match)
-            break;
-    if (kb == ke)
-        is.setstate(ios_base::failbit);
-    return kb;
-}
-
-}  // namespace detail
-
-#endif  // ONLY_C_LOCALE
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const fields<Duration>& fds, const std::string* abbrev,
-          const std::chrono::seconds* offset_sec)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using namespace detail;
-    tm tm{};
-#if !ONLY_C_LOCALE
-    auto& facet = use_facet<time_put<CharT>>(os.getloc());
-#endif
-    const CharT* command = nullptr;
-    CharT modified = CharT{};
-    for (; *fmt; ++fmt)
-    {
-        switch (*fmt)
-        {
-        case 'a':
-        case 'A':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    tm.tm_wday = static_cast<int>(extract_weekday(os, fds));
-                    if (os.fail())
-                        return os;
-#if !ONLY_C_LOCALE
-                    const CharT f[] = {'%', *fmt};
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-#else  // ONLY_C_LOCALE
-                    os << weekday_names().first[tm.tm_wday+7*(*fmt == 'a')];
-#endif  // ONLY_C_LOCALE
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'b':
-        case 'B':
-        case 'h':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    tm.tm_mon = static_cast<int>(extract_month(os, fds)) - 1;
-#if !ONLY_C_LOCALE
-                    const CharT f[] = {'%', *fmt};
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-#else  // ONLY_C_LOCALE
-                    os << month_names().first[tm.tm_mon+12*(*fmt == 'b')];
-#endif  // ONLY_C_LOCALE
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'c':
-        case 'x':
-            if (command)
-            {
-                if (modified == CharT{'O'})
-                    os << CharT{'%'} << modified << *fmt;
-                else
-                {
-#if !ONLY_C_LOCALE
-                    tm = std::tm{};
-                    auto const& ymd = fds.ymd;
-                    auto ld = local_days(ymd);
-                    tm.tm_sec = static_cast<int>(fds.tod.seconds().count());
-                    tm.tm_min = static_cast<int>(fds.tod.minutes().count());
-                    tm.tm_hour = static_cast<int>(fds.tod.hours().count());
-                    tm.tm_mday = static_cast<int>(static_cast<unsigned>(ymd.day()));
-                    tm.tm_mon = static_cast<int>(extract_month(os, fds) - 1);
-                    tm.tm_year = static_cast<int>(ymd.year()) - 1900;
-                    tm.tm_wday = static_cast<int>(extract_weekday(os, fds));
-                    if (os.fail())
-                        return os;
-                    tm.tm_yday = static_cast<int>((ld - local_days(ymd.year()/1/1)).count());
-                    CharT f[3] = {'%'};
-                    auto fe = begin(f) + 1;
-                    if (modified == CharT{'E'})
-                        *fe++ = modified;
-                    *fe++ = *fmt;
-                    facet.put(os, os, os.fill(), &tm, begin(f), fe);
-#else  // ONLY_C_LOCALE
-                    if (*fmt == 'c')
-                    {
-                        auto wd = static_cast<int>(extract_weekday(os, fds));
-                        os << weekday_names().first[static_cast<unsigned>(wd)+7]
-                           << ' ';
-                        os << month_names().first[extract_month(os, fds)-1+12] << ' ';
-                        auto d = static_cast<int>(static_cast<unsigned>(fds.ymd.day()));
-                        if (d < 10)
-                            os << ' ';
-                        os << d << ' '
-                           << make_time(duration_cast<seconds>(fds.tod.to_duration()))
-                           << ' ' << fds.ymd.year();
-
-                    }
-                    else  // *fmt == 'x'
-                    {
-                        auto const& ymd = fds.ymd;
-                        save_stream<CharT, Traits> _(os);
-                        os.fill('0');
-                        os.flags(std::ios::dec | std::ios::right);
-                        os.width(2);
-                        os << static_cast<unsigned>(ymd.month()) << CharT{'/'};
-                        os.width(2);
-                        os << static_cast<unsigned>(ymd.day()) << CharT{'/'};
-                        os.width(2);
-                        os << static_cast<int>(ymd.year()) % 100;
-                    }
-#endif  // ONLY_C_LOCALE
-                }
-                command = nullptr;
-                modified = CharT{};
-            }
-            else
-                os << *fmt;
-            break;
-        case 'C':
-            if (command)
-            {
-                auto y = static_cast<int>(fds.ymd.year());
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    save_stream<CharT, Traits> _(os);
-                    os.fill('0');
-                    os.flags(std::ios::dec | std::ios::right);
-                    if (y >= 0)
-                    {
-                        os.width(2);
-                        os << y/100;
-                    }
-                    else
-                    {
-                        os << CharT{'-'};
-                        os.width(2);
-                        os << -(y-99)/100;
-                    }
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'E'})
-                {
-                    tm.tm_year = y - 1900;
-                    CharT f[3] = {'%', 'E', 'C'};
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                command = nullptr;
-                modified = CharT{};
-            }
-            else
-                os << *fmt;
-            break;
-        case 'd':
-        case 'e':
-            if (command)
-            {
-                auto d = static_cast<int>(static_cast<unsigned>(fds.ymd.day()));
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    save_stream<CharT, Traits> _(os);
-                    if (*fmt == CharT{'d'})
-                        os.fill('0');
-                    os.flags(std::ios::dec | std::ios::right);
-                    os.width(2);
-                    os << d;
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'O'})
-                {
-                    tm.tm_mday = d;
-                    CharT f[3] = {'%', 'O', *fmt};
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                command = nullptr;
-                modified = CharT{};
-            }
-            else
-                os << *fmt;
-            break;
-        case 'D':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    auto const& ymd = fds.ymd;
-                    save_stream<CharT, Traits> _(os);
-                    os.fill('0');
-                    os.flags(std::ios::dec | std::ios::right);
-                    os.width(2);
-                    os << static_cast<unsigned>(ymd.month()) << CharT{'/'};
-                    os.width(2);
-                    os << static_cast<unsigned>(ymd.day()) << CharT{'/'};
-                    os.width(2);
-                    os << static_cast<int>(ymd.year()) % 100;
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'F':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    auto const& ymd = fds.ymd;
-                    save_stream<CharT, Traits> _(os);
-                    os.fill('0');
-                    os.flags(std::ios::dec | std::ios::right);
-                    os.width(4);
-                    os << static_cast<int>(ymd.year()) << CharT{'-'};
-                    os.width(2);
-                    os << static_cast<unsigned>(ymd.month()) << CharT{'-'};
-                    os.width(2);
-                    os << static_cast<unsigned>(ymd.day());
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'g':
-        case 'G':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    auto ld = local_days(fds.ymd);
-                    auto y = year_month_day{ld + days{3}}.year();
-                    auto start = local_days((y - years{1})/date::dec/thu[last]) + (mon-thu);
-                    if (ld < start)
-                        --y;
-                    if (*fmt == CharT{'G'})
-                        os << y;
-                    else
-                    {
-                        save_stream<CharT, Traits> _(os);
-                        os.fill('0');
-                        os.flags(std::ios::dec | std::ios::right);
-                        os.width(2);
-                        os << std::abs(static_cast<int>(y)) % 100;
-                    }
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'H':
-        case 'I':
-            if (command)
-            {
-                auto hms = fds.tod;
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    if (*fmt == CharT{'I'})
-                        hms.make12();
-                    if (hms.hours() < hours{10})
-                        os << CharT{'0'};
-                    os << hms.hours().count();
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'O'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_hour = static_cast<int>(hms.hours().count());
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'j':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    auto ld = local_days(fds.ymd);
-                    auto y = fds.ymd.year();
-                    auto doy = ld - local_days(y/jan/1) + days{1};
-                    save_stream<CharT, Traits> _(os);
-                    os.fill('0');
-                    os.flags(std::ios::dec | std::ios::right);
-                    os.width(3);
-                    os << doy.count();
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'm':
-            if (command)
-            {
-                auto m = static_cast<unsigned>(fds.ymd.month());
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    if (m < 10)
-                        os << CharT{'0'};
-                    os << m;
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'O'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_mon = static_cast<int>(m-1);
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'M':
-            if (command)
-            {
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    if (fds.tod.minutes() < minutes{10})
-                        os << CharT{'0'};
-                    os << fds.tod.minutes().count();
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'O'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_min = static_cast<int>(fds.tod.minutes().count());
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'n':
-            if (command)
-            {
-                if (modified == CharT{})
-                    os << CharT{'\n'};
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'p':
-            if (command)
-            {
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-                    const CharT f[] = {'%', *fmt};
-                    tm.tm_hour = static_cast<int>(fds.tod.hours().count());
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#else
-                if (fds.tod.hours() < hours{12})
-                    os << ampm_names().first[0];
-                else
-                    os << ampm_names().first[1];
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'r':
-            if (command)
-            {
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-                    const CharT f[] = {'%', *fmt};
-                    tm.tm_hour = static_cast<int>(fds.tod.hours().count());
-                    tm.tm_min = static_cast<int>(fds.tod.minutes().count());
-                    tm.tm_sec = static_cast<int>(fds.tod.seconds().count());
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#else
-                time_of_day<seconds> tod(duration_cast<seconds>(fds.tod.to_duration()));
-                tod.make12();
-                save_stream<CharT, Traits> _(os);
-                os.fill('0');
-                os.width(2);
-                os << tod.hours().count() << CharT{':'};
-                os.width(2);
-                os << tod.minutes().count() << CharT{':'};
-                os.width(2);
-                os << tod.seconds().count() << CharT{' '};
-                tod.make24();
-                if (tod.hours() < hours{12})
-                    os << ampm_names().first[0];
-                else
-                    os << ampm_names().first[1];
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'R':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    if (fds.tod.hours() < hours{10})
-                        os << CharT{'0'};
-                    os << fds.tod.hours().count() << CharT{':'};
-                    if (fds.tod.minutes() < minutes{10})
-                        os << CharT{'0'};
-                    os << fds.tod.minutes().count();
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'S':
-            if (command)
-            {
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    os << fds.tod.s_;
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'O'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_sec = static_cast<int>(fds.tod.s_.seconds().count());
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 't':
-            if (command)
-            {
-                if (modified == CharT{})
-                    os << CharT{'\t'};
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'T':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    os << fds.tod;
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'u':
-            if (command)
-            {
-                auto wd = extract_weekday(os, fds);
-                if (os.fail())
-                    return os;
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    os << (wd != 0 ? wd : 7u);
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'O'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_wday = static_cast<int>(wd);
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'U':
-            if (command)
-            {
-                auto const& ymd = fds.ymd;
-                auto ld = local_days(ymd);
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    auto st = local_days(sun[1]/jan/ymd.year());
-                    if (ld < st)
-                        os << CharT{'0'} << CharT{'0'};
-                    else
-                    {
-                        auto wn = duration_cast<weeks>(ld - st).count() + 1;
-                        if (wn < 10)
-                            os << CharT{'0'};
-                        os << wn;
-                    }
- #if !ONLY_C_LOCALE
-               }
-                else if (modified == CharT{'O'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_year = static_cast<int>(ymd.year()) - 1900;
-                    tm.tm_wday = static_cast<int>(extract_weekday(os, fds));
-                    if (os.fail())
-                        return os;
-                    tm.tm_yday = static_cast<int>((ld - local_days(ymd.year()/1/1)).count());
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'V':
-            if (command)
-            {
-                auto ld = local_days(fds.ymd);
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    auto y = year_month_day{ld + days{3}}.year();
-                    auto st = local_days((y - years{1})/12/thu[last]) + (mon-thu);
-                    if (ld < st)
-                    {
-                        --y;
-                        st = local_days((y - years{1})/12/thu[last]) + (mon-thu);
-                    }
-                    auto wn = duration_cast<weeks>(ld - st).count() + 1;
-                    if (wn < 10)
-                        os << CharT{'0'};
-                    os << wn;
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'O'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    auto const& ymd = fds.ymd;
-                    tm.tm_year = static_cast<int>(ymd.year()) - 1900;
-                    tm.tm_wday = static_cast<int>(extract_weekday(os, fds));
-                    if (os.fail())
-                        return os;
-                    tm.tm_yday = static_cast<int>((ld - local_days(ymd.year()/1/1)).count());
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'w':
-            if (command)
-            {
-                auto wd = extract_weekday(os, fds);
-                if (os.fail())
-                    return os;
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    os << wd;
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'O'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_wday = static_cast<int>(wd);
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'W':
-            if (command)
-            {
-                auto const& ymd = fds.ymd;
-                auto ld = local_days(ymd);
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    auto st = local_days(mon[1]/jan/ymd.year());
-                    if (ld < st)
-                        os << CharT{'0'} << CharT{'0'};
-                    else
-                    {
-                        auto wn = duration_cast<weeks>(ld - st).count() + 1;
-                        if (wn < 10)
-                            os << CharT{'0'};
-                        os << wn;
-                    }
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'O'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_year = static_cast<int>(ymd.year()) - 1900;
-                    tm.tm_wday = static_cast<int>(extract_weekday(os, fds));
-                    if (os.fail())
-                        return os;
-                    tm.tm_yday = static_cast<int>((ld - local_days(ymd.year()/1/1)).count());
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'X':
-            if (command)
-            {
-#if !ONLY_C_LOCALE
-                if (modified == CharT{'O'})
-                    os << CharT{'%'} << modified << *fmt;
-                else
-                {
-                    tm = std::tm{};
-                    tm.tm_sec = static_cast<int>(fds.tod.seconds().count());
-                    tm.tm_min = static_cast<int>(fds.tod.minutes().count());
-                    tm.tm_hour = static_cast<int>(fds.tod.hours().count());
-                    CharT f[3] = {'%'};
-                    auto fe = begin(f) + 1;
-                    if (modified == CharT{'E'})
-                        *fe++ = modified;
-                    *fe++ = *fmt;
-                    facet.put(os, os, os.fill(), &tm, begin(f), fe);
-                }
-#else
-                os << fds.tod;
-#endif
-                command = nullptr;
-                modified = CharT{};
-            }
-            else
-                os << *fmt;
-            break;
-        case 'y':
-            if (command)
-            {
-                auto y = static_cast<int>(fds.ymd.year());
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    y = std::abs(y) % 100;
-                    if (y < 10)
-                        os << CharT{'0'};
-                    os << y;
-#if !ONLY_C_LOCALE
-                }
-                else
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_year = y - 1900;
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'Y':
-            if (command)
-            {
-                auto y = fds.ymd.year();
-#if !ONLY_C_LOCALE
-                if (modified == CharT{})
-                {
-#endif
-                    os << y;
-#if !ONLY_C_LOCALE
-                }
-                else if (modified == CharT{'E'})
-                {
-                    const CharT f[] = {'%', modified, *fmt};
-                    tm.tm_year = static_cast<int>(y) - 1900;
-                    facet.put(os, os, os.fill(), &tm, begin(f), end(f));
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                }
-#endif
-                modified = CharT{};
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'z':
-            if (command)
-            {
-                if (offset_sec == nullptr)
-                {
-                    // Can not format %z with unknown offset
-                    os.setstate(ios::failbit);
-                    return os;
-                }
-                auto m = duration_cast<minutes>(*offset_sec);
-                auto neg = m < minutes{0};
-                m = date::abs(m);
-                auto h = duration_cast<hours>(m);
-                m -= h;
-                if (neg)
-                    os << CharT{'-'};
-                else
-                    os << CharT{'+'};
-                if (h < hours{10})
-                    os << CharT{'0'};
-                os << h.count();
-                if (modified != CharT{})
-                    os << CharT{':'};
-                if (m < minutes{10})
-                    os << CharT{'0'};
-                os << m.count();
-                command = nullptr;
-                modified = CharT{};
-            }
-            else
-                os << *fmt;
-            break;
-        case 'Z':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    if (abbrev == nullptr)
-                    {
-                        // Can not format %Z with unknown time_zone
-                        os.setstate(ios::failbit);
-                        return os;
-                    }
-                    for (auto c : *abbrev)
-                        os << CharT(c);
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    modified = CharT{};
-                }
-                command = nullptr;
-            }
-            else
-                os << *fmt;
-            break;
-        case 'E':
-        case 'O':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    modified = *fmt;
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << *fmt;
-                    command = nullptr;
-                    modified = CharT{};
-                }
-            }
-            else
-                os << *fmt;
-            break;
-        case '%':
-            if (command)
-            {
-                if (modified == CharT{})
-                {
-                    os << CharT{'%'};
-                    command = nullptr;
-                }
-                else
-                {
-                    os << CharT{'%'} << modified << CharT{'%'};
-                    command = nullptr;
-                    modified = CharT{};
-                }
-            }
-            else
-                command = fmt;
-            break;
-        default:
-            if (command)
-            {
-                os << CharT{'%'};
-                command = nullptr;
-            }
-            if (modified != CharT{})
-            {
-                os << modified;
-                modified = CharT{};
-            }
-            os << *fmt;
-            break;
-        }
-    }
-    if (command)
-        os << CharT{'%'};
-    if (modified != CharT{})
-        os << modified;
-    return os;
-}
-
-template <class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt, const year& y)
-{
-    using CT = std::chrono::seconds;
-    fields<CT> fds{y/0/0};
-    return to_stream(os, fmt, fds);
-}
-
-template <class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt, const month& m)
-{
-    using CT = std::chrono::seconds;
-    fields<CT> fds{m/0/0};
-    return to_stream(os, fmt, fds);
-}
-
-template <class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt, const day& d)
-{
-    using CT = std::chrono::seconds;
-    fields<CT> fds{d/0/0};
-    return to_stream(os, fmt, fds);
-}
-
-template <class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt, const weekday& wd)
-{
-    using CT = std::chrono::seconds;
-    fields<CT> fds{wd};
-    return to_stream(os, fmt, fds);
-}
-
-template <class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt, const year_month& ym)
-{
-    using CT = std::chrono::seconds;
-    fields<CT> fds{ym/0};
-    return to_stream(os, fmt, fds);
-}
-
-template <class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt, const month_day& md)
-{
-    using CT = std::chrono::seconds;
-    fields<CT> fds{md/0};
-    return to_stream(os, fmt, fds);
-}
-
-template <class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const year_month_day& ymd)
-{
-    using CT = std::chrono::seconds;
-    fields<CT> fds{ymd};
-    return to_stream(os, fmt, fds);
-}
-
-template <class CharT, class Traits, class Rep, class Period>
-inline
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const std::chrono::duration<Rep, Period>& d)
-{
-    using Duration = std::chrono::duration<Rep, Period>;
-    using CT = typename std::common_type<Duration, std::chrono::seconds>::type;
-    fields<CT> fds{time_of_day<CT>{d}};
-    return to_stream(os, fmt, fds);
-}
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const local_time<Duration>& tp, const std::string* abbrev = nullptr,
-          const std::chrono::seconds* offset_sec = nullptr)
-{
-    using CT = typename std::common_type<Duration, std::chrono::seconds>::type;
-    auto ld = floor<days>(tp);
-    fields<CT> fds{year_month_day{ld}, time_of_day<CT>{tp-local_seconds{ld}}};
-    return to_stream(os, fmt, fds, abbrev, offset_sec);
-}
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const sys_time<Duration>& tp)
-{
-    using namespace std::chrono;
-    using CT = typename std::common_type<Duration, seconds>::type;
-    const std::string abbrev("UTC");
-    CONSTDATA seconds offset{0};
-    auto sd = floor<days>(tp);
-    fields<CT> fds{year_month_day{sd}, time_of_day<CT>{tp-sys_seconds{sd}}};
-    return to_stream(os, fmt, fds, &abbrev, &offset);
-}
-
-// format
-
-template <class CharT, class Streamable>
-auto
-format(const std::locale& loc, const CharT* fmt, const Streamable& tp)
-    -> decltype(to_stream(std::declval<std::basic_ostream<CharT>&>(), fmt, tp),
-                std::basic_string<CharT>{})
-{
-    std::basic_ostringstream<CharT> os;
-    os.exceptions(std::ios::failbit | std::ios::badbit);
-    os.imbue(loc);
-    to_stream(os, fmt, tp);
-    return os.str();
-}
-
-template <class CharT, class Streamable>
-auto
-format(const CharT* fmt, const Streamable& tp)
-    -> decltype(to_stream(std::declval<std::basic_ostream<CharT>&>(), fmt, tp),
-                std::basic_string<CharT>{})
-{
-    std::basic_ostringstream<CharT> os;
-    os.exceptions(std::ios::failbit | std::ios::badbit);
-    to_stream(os, fmt, tp);
-    return os.str();
-}
-
-template <class CharT, class Traits, class Alloc, class Streamable>
-auto
-format(const std::locale& loc, const std::basic_string<CharT, Traits, Alloc>& fmt,
-       const Streamable& tp)
-    -> decltype(to_stream(std::declval<std::basic_ostream<CharT, Traits>&>(), fmt.c_str(), tp),
-                std::basic_string<CharT, Traits, Alloc>{})
-{
-    std::basic_ostringstream<CharT, Traits, Alloc> os;
-    os.exceptions(std::ios::failbit | std::ios::badbit);
-    os.imbue(loc);
-    to_stream(os, fmt.c_str(), tp);
-    return os.str();
-}
-
-template <class CharT, class Traits, class Alloc, class Streamable>
-auto
-format(const std::basic_string<CharT, Traits, Alloc>& fmt, const Streamable& tp)
-    -> decltype(to_stream(std::declval<std::basic_ostream<CharT, Traits>&>(), fmt.c_str(), tp),
-                std::basic_string<CharT, Traits, Alloc>{})
-{
-    std::basic_ostringstream<CharT, Traits, Alloc> os;
-    os.exceptions(std::ios::failbit | std::ios::badbit);
-    to_stream(os, fmt.c_str(), tp);
-    return os.str();
-}
-
-// parse
-
-namespace detail
-{
-
-template <class CharT, class Traits>
-bool
-read_char(std::basic_istream<CharT, Traits>& is, CharT fmt, std::ios::iostate& err)
-{
-    auto ic = is.get();
-    if (Traits::eq_int_type(ic, Traits::eof()) ||
-       !Traits::eq(Traits::to_char_type(ic), fmt))
-    {
-        err |= std::ios::failbit;
-        is.setstate(std::ios::failbit);
-        return false;
-    }
-    return true;
-}
-
-template <class CharT, class Traits>
-unsigned
-read_unsigned(std::basic_istream<CharT, Traits>& is, unsigned m = 1, unsigned M = 10)
-{
-    unsigned x = 0;
-    unsigned count = 0;
-    while (true)
-    {
-        auto ic = is.peek();
-        if (Traits::eq_int_type(ic, Traits::eof()))
-            break;
-        auto c = static_cast<char>(Traits::to_char_type(ic));
-        if (!('0' <= c && c <= '9'))
-            break;
-        (void)is.get();
-        ++count;
-        x = 10*x + static_cast<unsigned>(c - '0');
-        if (count == M)
-            break;
-    }
-    if (count < m)
-        is.setstate(std::ios::failbit);
-    return x;
-}
-
-template <class CharT, class Traits>
-int
-read_signed(std::basic_istream<CharT, Traits>& is, unsigned m = 1, unsigned M = 10)
-{
-    auto ic = is.peek();
-    if (!Traits::eq_int_type(ic, Traits::eof()))
-    {
-        auto c = static_cast<char>(Traits::to_char_type(ic));
-        if (('0' <= c && c <= '9') || c == '-' || c == '+')
-        {
-            if (c == '-' || c == '+')
-                (void)is.get();
-            auto x = static_cast<int>(read_unsigned(is, std::max(m, 1u), M));
-            if (!is.fail())
-            {
-                if (c == '-')
-                    x = -x;
-                return x;
-            }
-        }
-    }
-    if (m > 0)
-        is.setstate(std::ios::failbit);
-    return 0;
-}
-
-template <class CharT, class Traits>
-long double
-read_long_double(std::basic_istream<CharT, Traits>& is, unsigned m = 1, unsigned M = 10)
-{
-    using namespace std;
-    unsigned count = 0;
-    auto decimal_point = Traits::to_int_type(
-        use_facet<numpunct<CharT>>(is.getloc()).decimal_point());
-    std::string buf;
-    while (true)
-    {
-        auto ic = is.peek();
-        if (Traits::eq_int_type(ic, Traits::eof()))
-            break;
-        if (Traits::eq_int_type(ic, decimal_point))
-        {
-            buf += '.';
-            decimal_point = Traits::eof();
-            is.get();
-        }
-        else
-        {
-            auto c = static_cast<char>(Traits::to_char_type(ic));
-            if (!('0' <= c && c <= '9'))
-                break;
-            buf += c;
-            (void)is.get();
-        }
-        if (++count == M)
-            break;
-    }
-    if (count < m)
-    {
-        is.setstate(std::ios::failbit);
-        return 0;
-    }
-    return std::stold(buf);
-}
-
-struct rs
-{
-    int& i;
-    unsigned m;
-    unsigned M;
-};
-
-struct ru
-{
-    int& i;
-    unsigned m;
-    unsigned M;
-};
-
-struct rld
-{
-    long double& i;
-    unsigned m;
-    unsigned M;
-};
-
-template <class CharT, class Traits>
-void
-read(std::basic_istream<CharT, Traits>&)
-{
-}
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, CharT a0, Args&& ...args);
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, rs a0, Args&& ...args);
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, ru a0, Args&& ...args);
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, int a0, Args&& ...args);
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, rld a0, Args&& ...args);
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, CharT a0, Args&& ...args)
-{
-    // No-op if a0 == CharT{}
-    if (a0 != CharT{})
-    {
-        auto ic = is.peek();
-        if (Traits::eq_int_type(ic, Traits::eof()))
-        {
-            is.setstate(std::ios::failbit | std::ios::eofbit);
-            return;
-        }
-        if (!Traits::eq(Traits::to_char_type(ic), a0))
-        {
-            is.setstate(std::ios::failbit);
-            return;
-        }
-        (void)is.get();
-    }
-    read(is, std::forward<Args>(args)...);
-}
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, rs a0, Args&& ...args)
-{
-    auto x = read_signed(is, a0.m, a0.M);
-    if (is.fail())
-        return;
-    a0.i = x;
-    read(is, std::forward<Args>(args)...);
-}
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, ru a0, Args&& ...args)
-{
-    auto x = read_unsigned(is, a0.m, a0.M);
-    if (is.fail())
-        return;
-    a0.i = static_cast<int>(x);
-    read(is, std::forward<Args>(args)...);
-}
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, int a0, Args&& ...args)
-{
-    if (a0 != -1)
-    {
-        auto u = static_cast<unsigned>(a0);
-        CharT buf[std::numeric_limits<unsigned>::digits10+2] = {};
-        auto e = buf;
-        do
-        {
-            *e++ = CharT(u % 10) + CharT{'0'};
-            u /= 10;
-        } while (u > 0);
-        std::reverse(buf, e);
-        for (auto p = buf; p != e && is.rdstate() == std::ios::goodbit; ++p)
-            read(is, *p);
-    }
-    if (is.rdstate() == std::ios::goodbit)
-        read(is, std::forward<Args>(args)...);
-}
-
-template <class CharT, class Traits, class ...Args>
-void
-read(std::basic_istream<CharT, Traits>& is, rld a0, Args&& ...args)
-{
-    auto x = read_long_double(is, a0.m, a0.M);
-    if (is.fail())
-        return;
-    a0.i = x;
-    read(is, std::forward<Args>(args)...);
-}
-
-}  // namespace detail;
-
-template <class CharT, class Traits, class Duration, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-            fields<Duration>& fds, std::basic_string<CharT, Traits, Alloc>* abbrev,
-            std::chrono::minutes* offset)
-{
-    using namespace std;
-    using namespace std::chrono;
-    typename basic_istream<CharT, Traits>::sentry ok{is, true};
-    if (ok)
-    {
-#if !ONLY_C_LOCALE
-        auto& f = use_facet<time_get<CharT>>(is.getloc());
-        std::tm tm{};
-#endif
-        std::basic_string<CharT, Traits, Alloc> temp_abbrev;
-        minutes temp_offset{};
-        const CharT* command = nullptr;
-        auto modified = CharT{};
-        auto width = -1;
-        CONSTDATA int not_a_year = numeric_limits<short>::min();
-        int Y = not_a_year;
-        CONSTDATA int not_a_century = not_a_year / 100;
-        int C = not_a_century;
-        CONSTDATA int not_a_2digit_year = 100;
-        int y = not_a_2digit_year;
-        int m{};
-        int d{};
-        int j{};
-        CONSTDATA int not_a_weekday = 7;
-        int wd = not_a_weekday;
-        CONSTDATA int not_a_hour_12_value = 0;
-        int I = not_a_hour_12_value;
-        hours h{};
-        minutes min{};
-        Duration s{};
-        int g = not_a_2digit_year;
-        int G = not_a_year;
-        CONSTDATA int not_a_week_num = 100;
-        int V = not_a_week_num;
-        int U = not_a_week_num;
-        int W = not_a_week_num;
-        using detail::read;
-        using detail::rs;
-        using detail::ru;
-        using detail::rld;
-        for (; *fmt && is.rdstate() == std::ios::goodbit; ++fmt)
-        {
-            switch (*fmt)
-            {
-            case 'a':
-            case 'A':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    ios_base::iostate err = ios_base::goodbit;
-                    f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                    if ((err & ios::failbit) == 0)
-                        wd = tm.tm_wday;
-                    is.setstate(err);
-#else
-                    auto nm = detail::weekday_names();
-                    auto i = detail::scan_keyword(is, nm.first, nm.second) - nm.first;
-                    if (!is.fail())
-                        wd = i % 7;
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'b':
-            case 'B':
-            case 'h':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    ios_base::iostate err = ios_base::goodbit;
-                    f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                    if ((err & ios::failbit) == 0)
-                        m = tm.tm_mon + 1;
-                    is.setstate(err);
-#else
-                    auto nm = detail::month_names();
-                    auto i = detail::scan_keyword(is, nm.first, nm.second) - nm.first;
-                    if (!is.fail())
-                        m = i % 12 + 1;
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'c':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    ios_base::iostate err = ios_base::goodbit;
-                    f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                    if ((err & ios::failbit) == 0)
-                    {
-                        Y = tm.tm_year + 1900;
-                        m = tm.tm_mon + 1;
-                        d = tm.tm_mday;
-                        h = hours{tm.tm_hour};
-                        min = minutes{tm.tm_min};
-                        s = duration_cast<Duration>(seconds{tm.tm_sec});
-                    }
-                    is.setstate(err);
-#else
-                    auto nm = detail::weekday_names();
-                    auto i = detail::scan_keyword(is, nm.first, nm.second) - nm.first;
-                    if (is.fail())
-                        goto broken;
-                    wd = i % 7;
-                    ws(is);
-                    nm = detail::month_names();
-                    i = detail::scan_keyword(is, nm.first, nm.second) - nm.first;
-                    if (is.fail())
-                        goto broken;
-                    m = i % 12 + 1;
-                    ws(is);
-                    read(is, rs{d, 1, 2});
-                    if (is.fail())
-                        goto broken;
-                    ws(is);
-                    using dfs = detail::decimal_format_seconds<Duration>;
-                    CONSTDATA auto w = Duration::period::den == 1 ? 2 : 3 + dfs::width;
-                    int H;
-                    int M;
-                    long double S;
-                    read(is, ru{H, 1, 2}, CharT{':'}, ru{M, 1, 2},
-                                          CharT{':'}, rld{S, 1, w});
-                    if (is.fail())
-                        goto broken;
-                    h = hours{H};
-                    min = minutes{M};
-                    s = round<Duration>(duration<long double>{S});
-                    ws(is);
-                    read(is, rs{Y, 1, 4u});
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'x':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    ios_base::iostate err = ios_base::goodbit;
-                    f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                    if ((err & ios::failbit) == 0)
-                    {
-                        Y = tm.tm_year + 1900;
-                        m = tm.tm_mon + 1;
-                        d = tm.tm_mday;
-                    }
-                    is.setstate(err);
-#else
-                    read(is, ru{m, 1, 2}, CharT{'/'}, ru{d, 1, 2}, CharT{'/'},
-                             rs{y, 1, 2});
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'X':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    ios_base::iostate err = ios_base::goodbit;
-                    f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                    if ((err & ios::failbit) == 0)
-                    {
-                        h = hours{tm.tm_hour};
-                        min = minutes{tm.tm_min};
-                        s = duration_cast<Duration>(seconds{tm.tm_sec});
-                    }
-                    is.setstate(err);
-#else
-                    using dfs = detail::decimal_format_seconds<Duration>;
-                    CONSTDATA auto w = Duration::period::den == 1 ? 2 : 3 + dfs::width;
-                    int H;
-                    int M;
-                    long double S;
-                    read(is, ru{H, 1, 2}, CharT{':'}, ru{M, 1, 2},
-                                          CharT{':'}, rld{S, 1, w});
-                    if (!is.fail())
-                    {
-                        h = hours{H};
-                        min = minutes{M};
-                        s = round<Duration>(duration<long double>{S});
-                    }
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'C':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    if (modified == CharT{})
-                    {
-#endif
-                        read(is, rs{C, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-#if !ONLY_C_LOCALE
-                    }
-                    else
-                    {
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        if ((err & ios::failbit) == 0)
-                        {
-                            auto tY = tm.tm_year + 1900;
-                            C = (tY >= 0 ? tY : tY-99) / 100;
-                        }
-                        is.setstate(err);
-                    }
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'D':
-                if (command)
-                {
-                    if (modified == CharT{})
-                        read(is, ru{m, 1, 2}, CharT{'\0'}, CharT{'/'}, CharT{'\0'},
-                                 ru{d, 1, 2}, CharT{'\0'}, CharT{'/'}, CharT{'\0'},
-                                 rs{y, 1, 2});
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'F':
-                if (command)
-                {
-                    if (modified == CharT{})
-                        read(is, rs{Y, 1, width == -1 ? 4u : static_cast<unsigned>(width)},
-                                 CharT{'-'}, ru{m, 1, 2}, CharT{'-'}, ru{d, 1, 2});
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'd':
-            case 'e':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    if (modified == CharT{})
-#endif
-                        read(is, rs{d, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-#if !ONLY_C_LOCALE
-                    else if (modified == CharT{'O'})
-                    {
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        command = nullptr;
-                        width = -1;
-                        modified = CharT{};
-                        if ((err & ios::failbit) == 0)
-                            d = tm.tm_mday;
-                        is.setstate(err);
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'H':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    if (modified == CharT{})
-                    {
-#endif
-                        int H;
-                        read(is, ru{H, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-                        if (!is.fail())
-                            h = hours{H};
-#if !ONLY_C_LOCALE
-                    }
-                    else if (modified == CharT{'O'})
-                    {
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        if ((err & ios::failbit) == 0)
-                            h = hours{tm.tm_hour};
-                        is.setstate(err);
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'I':
-                if (command)
-                {
-                    if (modified == CharT{})
-                    {
-                        // reads in an hour into I, but most be in [1, 12]
-                        read(is, rs{I, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-                        if (I != not_a_hour_12_value)
-                        {
-                            if (!(1 <= I && I <= 12))
-                            {
-                                I = not_a_hour_12_value;
-                                goto broken;
-                            }
-                        }
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-               break;
-            case 'j':
-                if (command)
-                {
-                    if (modified == CharT{})
-                        read(is, ru{j, 1, width == -1 ? 3u : static_cast<unsigned>(width)});
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'M':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    if (modified == CharT{})
-                    {
-#endif
-                        int M;
-                        read(is, ru{M, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-                        if (!is.fail())
-                            min = minutes{M};
-#if !ONLY_C_LOCALE
-                    }
-                    else if (modified == CharT{'O'})
-                    {
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        if ((err & ios::failbit) == 0)
-                            min = minutes{tm.tm_min};
-                        is.setstate(err);
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'm':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    if (modified == CharT{})
-#endif
-                        read(is, rs{m, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-#if !ONLY_C_LOCALE
-                    else if (modified == CharT{'O'})
-                    {
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        if ((err & ios::failbit) == 0)
-                            m = tm.tm_mon + 1;
-                        is.setstate(err);
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'n':
-            case 't':
-                if (command)
-                {
-                    // %n matches a single white space character
-                    // %t matches 0 or 1 white space characters
-                    auto ic = is.peek();
-                    if (Traits::eq_int_type(ic, Traits::eof()))
-                    {
-                        ios_base::iostate err = ios_base::eofbit;
-                        if (*fmt == 'n')
-                            err |= ios_base::failbit;
-                        is.setstate(err);
-                        break;
-                    }
-                    if (isspace(ic))
-                    {
-                        (void)is.get();
-                    }
-                    else if (*fmt == 'n')
-                        is.setstate(ios_base::failbit);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'p':
-                // Error if haven't yet seen %I
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    if (modified == CharT{})
-                    {
-                        if (I == not_a_hour_12_value)
-                            goto broken;
-                        tm = std::tm{};
-                        tm.tm_hour = I;
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        if (err & ios::failbit)
-                            goto broken;
-                        h = hours{tm.tm_hour};
-                        I = not_a_hour_12_value;
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-#else
-                    if (I == not_a_hour_12_value)
-                        goto broken;
-                    auto nm = detail::ampm_names();
-                    auto i = detail::scan_keyword(is, nm.first, nm.second) - nm.first;
-                    if (is.fail())
-                        goto broken;
-                    h = hours{I};
-                    if (i == 1)
-                    {
-                        if (h != hours{12})
-                            h += hours{12};
-                    }
-                    else if (h == hours{12})
-                        h = hours{0};
-                    I = not_a_hour_12_value;
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-
-               break;
-            case 'r':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    ios_base::iostate err = ios_base::goodbit;
-                    f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                    if ((err & ios::failbit) == 0)
-                    {
-                        h = hours{tm.tm_hour};
-                        min = minutes{tm.tm_min};
-                        s = duration_cast<Duration>(seconds{tm.tm_sec});
-                    }
-                    is.setstate(err);
-#else
-                    using dfs = detail::decimal_format_seconds<Duration>;
-                    CONSTDATA auto w = Duration::period::den == 1 ? 2 : 3 + dfs::width;
-                    int H;
-                    int M;
-                    long double S;
-                    read(is, ru{H, 1, 2}, CharT{':'}, ru{M, 1, 2},
-                                          CharT{':'}, rld{S, 1, w});
-                    if (is.fail() || !(1 <= H && H <= 12))
-                        goto broken;
-                    ws(is);
-                    auto nm = detail::ampm_names();
-                    auto i = detail::scan_keyword(is, nm.first, nm.second) - nm.first;
-                    if (is.fail())
-                        goto broken;
-                    h = hours{H};
-                    if (i == 1)
-                    {
-                        if (h != hours{12})
-                            h += hours{12};
-                    }
-                    else if (h == hours{12})
-                        h = hours{0};
-                    min = minutes{M};
-                    s = round<Duration>(duration<long double>{S});
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'R':
-                if (command)
-                {
-                    if (modified == CharT{})
-                    {
-                        int H, M;
-                        read(is, ru{H, 1, 2}, CharT{'\0'}, CharT{':'}, CharT{'\0'},
-                                 ru{M, 1, 2}, CharT{'\0'});
-                        if (!is.fail())
-                        {
-                            h = hours{H};
-                            min = minutes{M};
-                        }
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'S':
-                if (command)
-                {
- #if !ONLY_C_LOCALE
-                   if (modified == CharT{})
-                    {
-#endif
-                        using dfs = detail::decimal_format_seconds<Duration>;
-                        CONSTDATA auto w = Duration::period::den == 1 ? 2 : 3 + dfs::width;
-                        long double S;
-                        read(is, rld{S, 1, width == -1 ? w : static_cast<unsigned>(width)});
-                        if (!is.fail())
-                            s = round<Duration>(duration<long double>{S});
-#if !ONLY_C_LOCALE
-                    }
-                    else if (modified == CharT{'O'})
-                    {
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        if ((err & ios::failbit) == 0)
-                            s = duration_cast<Duration>(seconds{tm.tm_sec});
-                        is.setstate(err);
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'T':
-                if (command)
-                {
-                    if (modified == CharT{})
-                    {
-                        using dfs = detail::decimal_format_seconds<Duration>;
-                        CONSTDATA auto w = Duration::period::den == 1 ? 2 : 3 + dfs::width;
-                        int H;
-                        int M;
-                        long double S;
-                        read(is, ru{H, 1, 2}, CharT{':'}, ru{M, 1, 2},
-                                              CharT{':'}, rld{S, 1, w});
-                        if (!is.fail())
-                        {
-                            h = hours{H};
-                            min = minutes{M};
-                            s = round<Duration>(duration<long double>{S});
-                        }
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'Y':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    if (modified == CharT{})
-#endif
-                        read(is, rs{Y, 1, width == -1 ? 4u : static_cast<unsigned>(width)});
-#if !ONLY_C_LOCALE
-                    else if (modified == CharT{'E'})
-                    {
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        if ((err & ios::failbit) == 0)
-                            Y = tm.tm_year + 1900;
-                        is.setstate(err);
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'y':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    if (modified == CharT{})
-#endif
-                        read(is, ru{y, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-#if !ONLY_C_LOCALE
-                    else
-                    {
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        if ((err & ios::failbit) == 0)
-                            Y = tm.tm_year + 1900;
-                        is.setstate(err);
-                    }
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'g':
-                if (command)
-                {
-                    if (modified == CharT{})
-                        read(is, ru{g, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'G':
-                if (command)
-                {
-                    if (modified == CharT{})
-                        read(is, rs{G, 1, width == -1 ? 4u : static_cast<unsigned>(width)});
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'U':
-                if (command)
-                {
-                    if (modified == CharT{})
-                        read(is, ru{U, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'V':
-                if (command)
-                {
-                    if (modified == CharT{})
-                        read(is, ru{V, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'W':
-                if (command)
-                {
-                    if (modified == CharT{})
-                        read(is, ru{W, 1, width == -1 ? 2u : static_cast<unsigned>(width)});
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'u':
-            case 'w':
-                if (command)
-                {
-#if !ONLY_C_LOCALE
-                    if (modified == CharT{})
-                    {
-#endif
-                        read(is, ru{wd, 1, width == -1 ? 1u : static_cast<unsigned>(width)});
-                        if (!is.fail() && *fmt == 'u')
-                        {
-                            if (wd == 7)
-                                wd = 0;
-                            else if (wd == 0)
-                                wd = 7;
-                        }
-#if !ONLY_C_LOCALE
-                    }
-                    else if (modified == CharT{'O'})
-                    {
-                        ios_base::iostate err = ios_base::goodbit;
-                        f.get(is, nullptr, is, err, &tm, command, fmt+1);
-                        if ((err & ios::failbit) == 0)
-                            wd = tm.tm_wday;
-                        is.setstate(err);
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-#endif
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'E':
-            case 'O':
-                if (command)
-                {
-                    if (modified == CharT{})
-                    {
-                        modified = *fmt;
-                    }
-                    else
-                    {
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                        command = nullptr;
-                        width = -1;
-                        modified = CharT{};
-                    }
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case '%':
-                if (command)
-                {
-                    if (modified == CharT{})
-                        read(is, *fmt);
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    command = fmt;
-                break;
-            case 'z':
-                if (command)
-                {
-                    int H, M;
-                    if (modified == CharT{})
-                    {
-                        read(is, rs{H, 2, 2});
-                        if (!is.fail())
-                            temp_offset = hours{H};
-                        if (is.good())
-                        {
-                            auto ic = is.peek();
-                            if (!Traits::eq_int_type(ic, Traits::eof()))
-                            {
-                                auto c = static_cast<char>(Traits::to_char_type(ic));
-                                if ('0' <= c && c <= '9')
-                                {
-                                    read(is, ru{M, 2, 2});
-                                    if (!is.fail())
-                                        temp_offset += minutes{ H < 0 ? -M : M };
-                                }
-                            }
-                        }
-                    }
-                    else
-                    {
-                        read(is, rs{H, 1, 2});
-                        if (!is.fail())
-                            temp_offset = hours{H};
-                        if (is.good())
-                        {
-                            auto ic = is.peek();
-                            if (!Traits::eq_int_type(ic, Traits::eof()))
-                            {
-                                auto c = static_cast<char>(Traits::to_char_type(ic));
-                                if (c == ':')
-                                {
-                                    (void)is.get();
-                                    read(is, ru{M, 2, 2});
-                                    if (!is.fail())
-                                        temp_offset += minutes{ H < 0 ? -M : M };
-                                }
-                            }
-                        }
-                    }
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            case 'Z':
-                if (command)
-                {
-                    if (modified == CharT{})
-                    {
-                        if (!temp_abbrev.empty())
-                            is.setstate(ios::failbit);
-                        else
-                        {
-                            while (is.rdstate() == std::ios::goodbit)
-                            {
-                                auto i = is.rdbuf()->sgetc();
-                                if (Traits::eq_int_type(i, Traits::eof()))
-                                {
-                                    is.setstate(ios::eofbit);
-                                    break;
-                                }
-                                auto wc = Traits::to_char_type(i);
-                                auto c = static_cast<char>(wc);
-                                // is c a valid time zone name or abbreviation character?
-                                if (!(CharT{1} < wc && wc < CharT{127}) || !(isalnum(c) ||
-                                        c == '_' || c == '/' || c == '-' || c == '+'))
-                                    break;
-                                temp_abbrev.push_back(c);
-                                is.rdbuf()->sbumpc();
-                            }
-                            if (temp_abbrev.empty())
-                                is.setstate(ios::failbit);
-                        }
-                    }
-                    else
-                        read(is, CharT{'%'}, width, modified, *fmt);
-                    command = nullptr;
-                    width = -1;
-                    modified = CharT{};
-                }
-                else
-                    read(is, *fmt);
-                break;
-            default:
-                if (command)
-                {
-                    if (width == -1 && modified == CharT{} && '0' <= *fmt && *fmt <= '9')
-                    {
-                        width = static_cast<char>(*fmt) - '0';
-                        while ('0' <= fmt[1] && fmt[1] <= '9')
-                            width = 10*width + static_cast<char>(*++fmt) - '0';
-                    }
-                    else
-                    {
-                        if (modified == CharT{})
-                            read(is, CharT{'%'}, width, *fmt);
-                        else
-                            read(is, CharT{'%'}, width, modified, *fmt);
-                        command = nullptr;
-                        width = -1;
-                        modified = CharT{};
-                    }
-                }
-                else  // !command
-                {
-                    if (isspace(*fmt))
-                        ws(is); // space matches 0 or more white space characters
-                    else
-                        read(is, *fmt);
-                }
-                break;
-            }
-        }
-        // is.rdstate() != ios::goodbit || *fmt == CharT{}
-        if (is.rdstate() == ios::goodbit && command)
-        {
-            if (modified == CharT{})
-                read(is, CharT{'%'}, width);
-            else
-                read(is, CharT{'%'}, width, modified);
-        }
-        if (is.rdstate() != ios::goodbit && *fmt != CharT{} && !is.fail())
-            is.setstate(ios::failbit);
-        if (!is.fail())
-        {
-            if (y != not_a_2digit_year)
-            {
-                // Convert y and an optional C to Y
-                if (!(0 <= y && y <= 99))
-                    goto broken;
-                if (C == not_a_century)
-                {
-                    if (Y == not_a_year)
-                    {
-                        if (y >= 69)
-                            C = 19;
-                        else
-                            C = 20;
-                    }
-                    else
-                    {
-                        C = (Y >= 0 ? Y : Y-100) / 100;
-                    }
-                }
-                int tY;
-                if (C >= 0)
-                    tY = 100*C + y;
-                else
-                    tY = 100*(C+1) - (y == 0 ? 100 : y);
-                if (Y != not_a_year && Y != tY)
-                    goto broken;
-                Y = tY;
-            }
-            if (g != not_a_2digit_year)
-            {
-                // Convert g and an optional C to G
-                if (!(0 <= g && g <= 99))
-                    goto broken;
-                if (C == not_a_century)
-                {
-                    if (G == not_a_year)
-                    {
-                        if (g >= 69)
-                            C = 19;
-                        else
-                            C = 20;
-                    }
-                    else
-                    {
-                        C = (G >= 0 ? G : G-100) / 100;
-                    }
-                }
-                int tG;
-                if (C >= 0)
-                    tG = 100*C + g;
-                else
-                    tG = 100*(C+1) - (g == 0 ? 100 : g);
-                if (G != not_a_year && G != tG)
-                    goto broken;
-                G = tG;
-            }
-            if (G != not_a_year)
-            {
-                // Convert G, V and wd to Y, m and d
-                if (V == not_a_week_num || wd == not_a_weekday)
-                    goto broken;
-                auto ymd = year_month_day{local_days(year{G-1}/dec/thu[last]) +
-                                          (mon-thu) + weeks{V-1} +
-                                          (weekday{static_cast<unsigned>(wd)}-mon)};
-                if (Y == not_a_year)
-                    Y = static_cast<int>(ymd.year());
-                else if (year{Y} != ymd.year())
-                    goto broken;
-                if (m == 0)
-                    m = static_cast<int>(static_cast<unsigned>(ymd.month()));
-                else if (month(static_cast<unsigned>(m)) != ymd.month())
-                    goto broken;
-                if (d == 0)
-                    d = static_cast<int>(static_cast<unsigned>(ymd.day()));
-                else if (day(static_cast<unsigned>(d)) != ymd.day())
-                    goto broken;
-            }
-            if (j != 0 && Y != not_a_year)
-            {
-                auto ymd = year_month_day{local_days(year{Y}/1/1) + days{j-1}};
-                if (m == 0)
-                    m = static_cast<int>(static_cast<unsigned>(ymd.month()));
-                else if (month(static_cast<unsigned>(m)) != ymd.month())
-                    goto broken;
-                if (d == 0)
-                    d = static_cast<int>(static_cast<unsigned>(ymd.day()));
-                else if (day(static_cast<unsigned>(d)) != ymd.day())
-                    goto broken;
-            }
-            if (U != not_a_week_num && Y != not_a_year)
-            {
-                if (wd == not_a_weekday)
-                    goto broken;
-                sys_days sd;
-                if (U == 0)
-                    sd = year{Y-1}/dec/weekday{static_cast<unsigned>(wd)}[last];
-                else
-                    sd = sys_days(year{Y}/jan/sun[1]) + weeks{U-1} +
-                         (weekday{static_cast<unsigned>(wd)} - sun);
-                year_month_day ymd = sd;
-                if (year{Y} != ymd.year())
-                    goto broken;
-                if (m == 0)
-                    m = static_cast<int>(static_cast<unsigned>(ymd.month()));
-                else if (month(static_cast<unsigned>(m)) != ymd.month())
-                    goto broken;
-                if (d == 0)
-                    d = static_cast<int>(static_cast<unsigned>(ymd.day()));
-                else if (day(static_cast<unsigned>(d)) != ymd.day())
-                    goto broken;
-            }
-            if (W != not_a_week_num && Y != not_a_year)
-            {
-                if (wd == not_a_weekday)
-                    goto broken;
-                sys_days sd;
-                if (W == 0)
-                    sd = year{Y-1}/dec/weekday{static_cast<unsigned>(wd)}[last];
-                else
-                    sd = sys_days(year{Y}/jan/mon[1]) + weeks{W-1} +
-                         (weekday{static_cast<unsigned>(wd)} - mon);
-                year_month_day ymd = sd;
-                if (year{Y} != ymd.year())
-                    goto broken;
-                if (m == 0)
-                    m = static_cast<int>(static_cast<unsigned>(ymd.month()));
-                else if (month(static_cast<unsigned>(m)) != ymd.month())
-                    goto broken;
-                if (d == 0)
-                    d = static_cast<int>(static_cast<unsigned>(ymd.day()));
-                else if (day(static_cast<unsigned>(d)) != ymd.day())
-                    goto broken;
-            }
-            if (Y < static_cast<int>(year::min()) || Y > static_cast<int>(year::max()))
-                Y = not_a_year;
-            auto ymd = year{Y}/m/d;
-            if (wd != not_a_weekday && ymd.ok())
-            {
-                if (weekday{static_cast<unsigned>(wd)} != weekday(ymd))
-                    goto broken;
-            }
-            fds.ymd = ymd;
-            fds.tod = time_of_day<Duration>{h};
-            fds.tod.m_ = min;
-            fds.tod.s_ = detail::decimal_format_seconds<Duration>{s};
-            if (wd != not_a_weekday)
-                fds.wd = weekday{static_cast<unsigned>(wd)};
-            if (abbrev != nullptr)
-                *abbrev = std::move(temp_abbrev);
-            if (offset != nullptr)
-                *offset = temp_offset;
-        }
-        return is;
-    }
-broken:
-    is.setstate(ios_base::failbit);
-    return is;
-}
-
-template <class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt, year& y,
-            std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = seconds;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offset);
-    if (!fds.ymd.year().ok())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        y = fds.ymd.year();
-    return is;
-}
-
-template <class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt, month& m,
-            std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = seconds;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offset);
-    if (!fds.ymd.month().ok())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        m = fds.ymd.month();
-    return is;
-}
-
-template <class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt, day& d,
-            std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = seconds;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offset);
-    if (!fds.ymd.day().ok())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        d = fds.ymd.day();
-    return is;
-}
-
-template <class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt, weekday& wd,
-            std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = seconds;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offset);
-    if (!fds.wd.ok())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        wd = fds.wd;
-    return is;
-}
-
-template <class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt, year_month& ym,
-            std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = seconds;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offset);
-    if (!fds.ymd.month().ok())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        ym = fds.ymd.year()/fds.ymd.month();
-    return is;
-}
-
-template <class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt, month_day& md,
-            std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = seconds;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offset);
-    if (!fds.ymd.month().ok() || !fds.ymd.day().ok())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        md = fds.ymd.month()/fds.ymd.day();
-    return is;
-}
-
-template <class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-            year_month_day& ymd, std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = seconds;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offset);
-    if (!fds.ymd.ok())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        ymd = fds.ymd;
-    return is;
-}
-
-template <class Duration, class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-            sys_time<Duration>& tp, std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = typename common_type<Duration, seconds>::type;
-    minutes offset_local{};
-    auto offptr = offset ? offset : &offset_local;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offptr);
-    if (!fds.ymd.ok() || !fds.tod.in_conventional_range())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        tp = round<Duration>(sys_days(fds.ymd) - *offptr + fds.tod.to_duration());
-    return is;
-}
-
-template <class Duration, class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-            local_time<Duration>& tp, std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = typename common_type<Duration, seconds>::type;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offset);
-    if (!fds.ymd.ok() || !fds.tod.in_conventional_range())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        tp = round<Duration>(local_seconds{local_days(fds.ymd)} + fds.tod.to_duration());
-    return is;
-}
-
-template <class Rep, class Period, class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-            std::chrono::duration<Rep, Period>& d,
-            std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using Duration = std::chrono::duration<Rep, Period>;
-    using CT = typename common_type<Duration, seconds>::type;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offset);
-    if (!is.fail())
-        d = duration_cast<Duration>(fds.tod.to_duration());
-    return is;
-}
-
-template <class Parsable, class CharT, class Traits = std::char_traits<CharT>,
-          class Alloc = std::allocator<CharT>>
-struct parse_manip
-{
-    const std::basic_string<CharT, Traits, Alloc> format_;
-    Parsable&                                     tp_;
-    std::basic_string<CharT, Traits, Alloc>*      abbrev_;
-    std::chrono::minutes*                         offset_;
-
-public:
-    parse_manip(std::basic_string<CharT, Traits, Alloc> format, Parsable& tp,
-                std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-                std::chrono::minutes* offset = nullptr)
-        : format_(std::move(format))
-        , tp_(tp)
-        , abbrev_(abbrev)
-        , offset_(offset)
-        {}
-
-};
-
-template <class Parsable, class CharT, class Traits, class Alloc>
-std::basic_istream<CharT, Traits>&
-operator>>(std::basic_istream<CharT, Traits>& is,
-           const parse_manip<Parsable, CharT, Traits, Alloc>& x)
-{
-    return from_stream(is, x.format_.c_str(), x.tp_, x.abbrev_, x.offset_);
-}
-
-template <class Parsable, class CharT, class Traits, class Alloc>
-inline
-auto
-parse(const std::basic_string<CharT, Traits, Alloc>& format, Parsable& tp)
-    -> decltype(from_stream(std::declval<std::basic_istream<CharT, Traits>&>(),
-                            format.c_str(), tp),
-                parse_manip<Parsable, CharT, Traits, Alloc>{format, tp})
-{
-    return {format, tp};
-}
-
-template <class Parsable, class CharT, class Traits, class Alloc>
-inline
-auto
-parse(const std::basic_string<CharT, Traits, Alloc>& format, Parsable& tp,
-      std::basic_string<CharT, Traits, Alloc>& abbrev)
-    -> decltype(from_stream(std::declval<std::basic_istream<CharT, Traits>&>(),
-                            format.c_str(), tp, &abbrev),
-                parse_manip<Parsable, CharT, Traits, Alloc>{format, tp, &abbrev})
-{
-    return {format, tp, &abbrev};
-}
-
-template <class Parsable, class CharT, class Traits, class Alloc>
-inline
-auto
-parse(const std::basic_string<CharT, Traits, Alloc>& format, Parsable& tp,
-      std::chrono::minutes& offset)
-    -> decltype(from_stream(std::declval<std::basic_istream<CharT, Traits>&>(),
-                            format.c_str(), tp, nullptr, &offset),
-                parse_manip<Parsable, CharT, Traits, Alloc>{format, tp, nullptr, &offset})
-{
-    return {format, tp, nullptr, &offset};
-}
-
-template <class Parsable, class CharT, class Traits, class Alloc>
-inline
-auto
-parse(const std::basic_string<CharT, Traits, Alloc>& format, Parsable& tp,
-      std::basic_string<CharT, Traits, Alloc>& abbrev, std::chrono::minutes& offset)
-    -> decltype(from_stream(std::declval<std::basic_istream<CharT, Traits>&>(),
-                            format.c_str(), tp, &abbrev, &offset),
-                parse_manip<Parsable, CharT, Traits, Alloc>{format, tp, &abbrev, &offset})
-{
-    return {format, tp, &abbrev, &offset};
-}
-
-// const CharT* formats
-
-template <class Parsable, class CharT>
-inline
-auto
-parse(const CharT* format, Parsable& tp)
-    -> decltype(from_stream(std::declval<std::basic_istream<CharT>&>(), format, tp),
-                parse_manip<Parsable, CharT>{format, tp})
-{
-    return {format, tp};
-}
-
-template <class Parsable, class CharT, class Traits, class Alloc>
-inline
-auto
-parse(const CharT* format, Parsable& tp, std::basic_string<CharT, Traits, Alloc>& abbrev)
-    -> decltype(from_stream(std::declval<std::basic_istream<CharT, Traits>&>(), format,
-                            tp, &abbrev),
-                parse_manip<Parsable, CharT, Traits, Alloc>{format, tp, &abbrev})
-{
-    return {format, tp, &abbrev};
-}
-
-template <class Parsable, class CharT>
-inline
-auto
-parse(const CharT* format, Parsable& tp, std::chrono::minutes& offset)
-    -> decltype(from_stream(std::declval<std::basic_istream<CharT>&>(), format,
-                            tp, nullptr, &offset),
-                parse_manip<Parsable, CharT>{format, tp, nullptr, &offset})
-{
-    return {format, tp, nullptr, &offset};
-}
-
-template <class Parsable, class CharT, class Traits, class Alloc>
-inline
-auto
-parse(const CharT* format, Parsable& tp,
-      std::basic_string<CharT, Traits, Alloc>& abbrev, std::chrono::minutes& offset)
-    -> decltype(from_stream(std::declval<std::basic_istream<CharT, Traits>&>(), format,
-                            tp, &abbrev, &offset),
-                parse_manip<Parsable, CharT, Traits, Alloc>{format, tp, &abbrev, &offset})
-{
-    return {format, tp, &abbrev, &offset};
-}
-
-// duration streaming
-
-namespace detail
-{
-
-#if __cplusplus >= 201402  && (!defined(__EDG_VERSION__) || __EDG_VERSION__ > 411) \
-                           && (!defined(__SUNPRO_CC) || __SUNPRO_CC > 0x5150)
-
-template <class CharT, std::size_t N>
-class string_literal
-{
-    CharT p_[N];
-
-public:
-    using const_iterator = const CharT*;
-
-    string_literal(string_literal const&) = default;
-    string_literal& operator=(string_literal const&) = delete;
-
-    template <std::size_t N1 = 2,
-              class = std::enable_if_t<N1 == N>>
-    CONSTCD14 string_literal(CharT c) NOEXCEPT
-        : p_{c}
-    {
-    }
-
-    CONSTCD14 string_literal(const CharT(&a)[N]) NOEXCEPT
-        : p_{}
-    {
-        for (std::size_t i = 0; i < N; ++i)
-            p_[i] = a[i];
-    }
-
-    template <class U = CharT, class = std::enable_if_t<1 < sizeof(U)>>
-    CONSTCD14 string_literal(const char(&a)[N]) NOEXCEPT
-        : p_{}
-    {
-        for (std::size_t i = 0; i < N; ++i)
-            p_[i] = a[i];
-    }
-
-    template <class CharT2, class = std::enable_if_t<!std::is_same<CharT2, CharT>{}>>
-    CONSTCD14 string_literal(string_literal<CharT2, N> const& a) NOEXCEPT
-        : p_{}
-    {
-        for (std::size_t i = 0; i < N; ++i)
-            p_[i] = a[i];
-    }
-
-    template <std::size_t N1, std::size_t N2,
-              class = std::enable_if_t<N1 + N2 - 1 == N>>
-    CONSTCD14 string_literal(const string_literal<CharT, N1>& x,
-                             const string_literal<CharT, N2>& y) NOEXCEPT
-        : p_{}
-    {
-        std::size_t i = 0;
-        for (; i < N1-1; ++i)
-            p_[i] = x[i];
-        for (std::size_t j = 0; j < N2; ++j, ++i)
-            p_[i] = y[j];
-    }
-
-    CONSTCD14 const CharT* data() const NOEXCEPT {return p_;}
-    CONSTCD14 std::size_t size() const NOEXCEPT {return N-1;}
-
-    CONSTCD14 const_iterator begin() const NOEXCEPT {return p_;}
-    CONSTCD14 const_iterator end()   const NOEXCEPT {return p_ + N-1;}
-
-    CONSTCD14 CharT const& operator[](std::size_t n) const NOEXCEPT
-    {
-        return p_[n];
-    }
-
-    template <class Traits>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    operator<<(std::basic_ostream<CharT, Traits>& os, const string_literal& s)
-    {
-        return os << s.p_;
-    }
-};
-
-template <class CharT1, class CharT2, std::size_t N1, std::size_t N2>
-CONSTCD14
-inline
-string_literal<std::conditional_t<sizeof(CharT2) <= sizeof(CharT1), CharT1, CharT2>,
-               N1 + N2 - 1>
-operator+(const string_literal<CharT1, N1>& x, const string_literal<CharT2, N2>& y) NOEXCEPT
-{
-    using CharT = std::conditional_t<sizeof(CharT2) <= sizeof(CharT1), CharT1, CharT2>;
-    return string_literal<CharT, N1 + N2 - 1>{string_literal<CharT, N1>{x},
-                                              string_literal<CharT, N2>{y}};
-}
-
-template <class CharT, class Traits, class Alloc, std::size_t N>
-inline
-std::basic_string<CharT, Traits, Alloc>
-operator+(std::basic_string<CharT, Traits, Alloc> x,
-          const string_literal<CharT, N>& y) NOEXCEPT
-{
-    x.append(y.data(), y.size());
-    return x;
-}
-
-template <class CharT, std::size_t N>
-CONSTCD14
-inline
-string_literal<CharT, N>
-msl(const CharT(&a)[N]) NOEXCEPT
-{
-    return string_literal<CharT, N>{a};
-}
-
-template <class CharT,
-          class = std::enable_if_t<std::is_same<CharT, char>{} ||
-                                   std::is_same<CharT, wchar_t>{} ||
-                                   std::is_same<CharT, char16_t>{} ||
-                                   std::is_same<CharT, char32_t>{}>>
-CONSTCD14
-inline
-string_literal<CharT, 2>
-msl(CharT c) NOEXCEPT
-{
-    return string_literal<CharT, 2>{c};
-}
-
-CONSTCD14
-inline
-std::size_t
-to_string_len(std::intmax_t i)
-{
-    std::size_t r = 0;
-    do
-    {
-        i /= 10;
-        ++r;
-    } while (i > 0);
-    return r;
-}
-
-template <std::intmax_t N>
-CONSTCD14
-inline
-std::enable_if_t
-<
-    N < 10,
-    string_literal<char, to_string_len(N)+1>
->
-msl() NOEXCEPT
-{
-    return msl(char(N % 10 + '0'));
-}
-
-template <std::intmax_t N>
-CONSTCD14
-inline
-std::enable_if_t
-<
-    10 <= N,
-    string_literal<char, to_string_len(N)+1>
->
-msl() NOEXCEPT
-{
-    return msl<N/10>() + msl(char(N % 10 + '0'));
-}
-
-template <class CharT, std::intmax_t N, std::intmax_t D>
-CONSTCD14
-inline
-std::enable_if_t
-<
-    std::ratio<N, D>::type::den != 1,
-    string_literal<CharT, to_string_len(std::ratio<N, D>::type::num) +
-                          to_string_len(std::ratio<N, D>::type::den) + 4>
->
-msl(std::ratio<N, D>) NOEXCEPT
-{
-    using R = typename std::ratio<N, D>::type;
-    return msl(CharT{'['}) + msl<R::num>() + msl(CharT{'/'}) +
-                             msl<R::den>() + msl(CharT{']'});
-}
-
-template <class CharT, std::intmax_t N, std::intmax_t D>
-CONSTCD14
-inline
-std::enable_if_t
-<
-    std::ratio<N, D>::type::den == 1,
-    string_literal<CharT, to_string_len(std::ratio<N, D>::type::num) + 3>
->
-msl(std::ratio<N, D>) NOEXCEPT
-{
-    using R = typename std::ratio<N, D>::type;
-    return msl(CharT{'['}) + msl<R::num>() + msl(CharT{']'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::atto) NOEXCEPT
-{
-    return msl(CharT{'a'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::femto) NOEXCEPT
-{
-    return msl(CharT{'f'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::pico) NOEXCEPT
-{
-    return msl(CharT{'p'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::nano) NOEXCEPT
-{
-    return msl(CharT{'n'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-std::enable_if_t
-<
-    std::is_same<CharT, char>{},
-    string_literal<char, 3>
->
-msl(std::micro) NOEXCEPT
-{
-    return string_literal<char, 3>{"\xC2\xB5"};
-}
-
-template <class CharT>
-CONSTCD14
-inline
-std::enable_if_t
-<
-    !std::is_same<CharT, char>{},
-    string_literal<CharT, 2>
->
-msl(std::micro) NOEXCEPT
-{
-    return string_literal<CharT, 2>{CharT{static_cast<unsigned char>('\xB5')}};
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::milli) NOEXCEPT
-{
-    return msl(CharT{'m'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::centi) NOEXCEPT
-{
-    return msl(CharT{'c'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::deci) NOEXCEPT
-{
-    return msl(CharT{'d'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::deca) NOEXCEPT
-{
-    return string_literal<CharT, 3>{"da"};
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::hecto) NOEXCEPT
-{
-    return msl(CharT{'h'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::kilo) NOEXCEPT
-{
-    return msl(CharT{'k'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::mega) NOEXCEPT
-{
-    return msl(CharT{'M'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::giga) NOEXCEPT
-{
-    return msl(CharT{'G'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::tera) NOEXCEPT
-{
-    return msl(CharT{'T'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::peta) NOEXCEPT
-{
-    return msl(CharT{'P'});
-}
-
-template <class CharT>
-CONSTCD14
-inline
-auto
-msl(std::exa) NOEXCEPT
-{
-    return msl(CharT{'E'});
-}
-
-template <class CharT, class Period>
-CONSTCD14
-auto
-get_units(Period p)
-{
-    return msl<CharT>(p) + string_literal<CharT, 2>{"s"};
-}
-
-template <class CharT>
-CONSTCD14
-auto
-get_units(std::ratio<1>)
-{
-    return string_literal<CharT, 2>{"s"};
-}
-
-template <class CharT>
-CONSTCD14
-auto
-get_units(std::ratio<60>)
-{
-    return string_literal<CharT, 4>{"min"};
-}
-
-template <class CharT>
-CONSTCD14
-auto
-get_units(std::ratio<3600>)
-{
-    return string_literal<CharT, 2>{"h"};
-}
-
-#else  // __cplusplus < 201402 || (defined(__EDG_VERSION__) && __EDG_VERSION__ <= 411)
-
-inline
-std::string
-to_string(std::uint64_t x)
-{
-    return std::to_string(x);
-}
-
-template <class CharT>
-std::basic_string<CharT>
-to_string(std::uint64_t x)
-{
-    auto y = std::to_string(x);
-    return std::basic_string<CharT>(y.begin(), y.end());
-}
-
-template <class CharT, std::intmax_t N, std::intmax_t D>
-inline
-typename std::enable_if
-<
-    std::ratio<N, D>::type::den != 1,
-    std::basic_string<CharT>
->::type
-msl(std::ratio<N, D>)
-{
-    using R = typename std::ratio<N, D>::type;
-    return std::basic_string<CharT>(1, '[') + to_string<CharT>(R::num) + CharT{'/'} +
-                                              to_string<CharT>(R::den) + CharT{']'};
-}
-
-template <class CharT, std::intmax_t N, std::intmax_t D>
-inline
-typename std::enable_if
-<
-    std::ratio<N, D>::type::den == 1,
-    std::basic_string<CharT>
->::type
-msl(std::ratio<N, D>)
-{
-    using R = typename std::ratio<N, D>::type;
-    return std::basic_string<CharT>(1, '[') + to_string<CharT>(R::num) + CharT{']'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::atto)
-{
-    return {'a'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::femto)
-{
-    return {'f'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::pico)
-{
-    return {'p'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::nano)
-{
-    return {'n'};
-}
-
-template <class CharT>
-inline
-typename std::enable_if
-<
-    std::is_same<CharT, char>::value,
-    std::string
->::type
-msl(std::micro)
-{
-    return "\xC2\xB5";
-}
-
-template <class CharT>
-inline
-typename std::enable_if
-<
-    !std::is_same<CharT, char>::value,
-    std::basic_string<CharT>
->::type
-msl(std::micro)
-{
-    return {CharT(static_cast<unsigned char>('\xB5'))};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::milli)
-{
-    return {'m'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::centi)
-{
-    return {'c'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::deci)
-{
-    return {'d'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::deca)
-{
-    return {'d', 'a'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::hecto)
-{
-    return {'h'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::kilo)
-{
-    return {'k'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::mega)
-{
-    return {'M'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::giga)
-{
-    return {'G'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::tera)
-{
-    return {'T'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::peta)
-{
-    return {'P'};
-}
-
-template <class CharT>
-inline
-std::basic_string<CharT>
-msl(std::exa)
-{
-    return {'E'};
-}
-
-template <class CharT, class Period>
-std::basic_string<CharT>
-get_units(Period p)
-{
-    return msl<CharT>(p) + CharT{'s'};
-}
-
-template <class CharT>
-std::basic_string<CharT>
-get_units(std::ratio<1>)
-{
-    return {'s'};
-}
-
-template <class CharT>
-std::basic_string<CharT>
-get_units(std::ratio<60>)
-{
-    return {'m', 'i', 'n'};
-}
-
-template <class CharT>
-std::basic_string<CharT>
-get_units(std::ratio<3600>)
-{
-    return {'h'};
-}
-
-#endif  // __cplusplus < 201402 || (defined(__EDG_VERSION__) && __EDG_VERSION__ <= 411)
-
-template <class CharT, class Traits = std::char_traits<CharT>>
-struct make_string;
-
-template <>
-struct make_string<char>
-{
-    template <class Rep>
-    static
-    std::string
-    from(Rep n)
-    {
-        return std::to_string(n);
-    }
-};
-
-template <class Traits>
-struct make_string<char, Traits>
-{
-    template <class Rep>
-    static
-    std::basic_string<char, Traits>
-    from(Rep n)
-    {
-        auto s = std::to_string(n);
-        return std::basic_string<char, Traits>(s.begin(), s.end());
-    }
-};
-
-template <>
-struct make_string<wchar_t>
-{
-    template <class Rep>
-    static
-    std::wstring
-    from(Rep n)
-    {
-        return std::to_wstring(n);
-    }
-};
-
-template <class Traits>
-struct make_string<wchar_t, Traits>
-{
-    template <class Rep>
-    static
-    std::basic_string<wchar_t, Traits>
-    from(Rep n)
-    {
-        auto s = std::to_wstring(n);
-        return std::basic_string<wchar_t, Traits>(s.begin(), s.end());
-    }
-};
-
-}  // namespace detail
-
-template <class CharT, class Traits, class Rep, class Period>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os,
-           const std::chrono::duration<Rep, Period>& d)
-{
-    using namespace detail;
-    return os << make_string<CharT, Traits>::from(d.count()) +
-                 get_units<CharT>(typename Period::type{});
-}
-
-}  // namespace date
-
-
-#ifdef __GNUC__
-# pragma GCC diagnostic pop
-#endif
-
-
-#endif  // DATE_H
diff --git a/thirdparty/date/include/date/ios.h b/thirdparty/date/include/date/ios.h
deleted file mode 100644
index ee54b9d..0000000
--- a/thirdparty/date/include/date/ios.h
+++ /dev/null
@@ -1,50 +0,0 @@
-//
-//  ios.h
-//  DateTimeLib
-//
-// The MIT License (MIT)
-//
-// Copyright (c) 2016 Alexander Kormanovsky
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-
-#ifndef ios_hpp
-#define ios_hpp
-
-#if __APPLE__
-# include <TargetConditionals.h>
-# if TARGET_OS_IPHONE
-#   include <string>
-
-    namespace date
-    {
-    namespace iOSUtils
-    {
-    
-    std::string get_tzdata_path();
-    std::string get_current_timezone();
-    
-    }  // namespace iOSUtils
-    }  // namespace date
-
-# endif  // TARGET_OS_IPHONE
-#else   // !__APPLE__
-# define TARGET_OS_IPHONE 0
-#endif  // !__APPLE__
-#endif // ios_hpp
diff --git a/thirdparty/date/include/date/islamic.h b/thirdparty/date/include/date/islamic.h
deleted file mode 100644
index b18c493..0000000
--- a/thirdparty/date/include/date/islamic.h
+++ /dev/null
@@ -1,3031 +0,0 @@
-#ifndef ISLAMIC_H
-#define ISLAMIC_H
-
-// The MIT License (MIT)
-//
-// Copyright (c) 2016 Howard Hinnant
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-// Our apologies.  When the previous paragraph was written, lowercase had not yet
-// been invented (that would involve another several millennia of evolution).
-// We did not mean to shout.
-
-#include "date.h"
-
-namespace islamic
-{
-
-// durations
-
-using days = date::days;
-
-using weeks = date::weeks;
-
-using years = std::chrono::duration
-    <int, std::ratio_multiply<std::ratio<10631, 30>, days::period>>;
-
-using months = std::chrono::duration
-    <int, std::ratio_divide<years::period, std::ratio<12>>>;
-
-// time_point
-
-using sys_days   = date::sys_days;
-using local_days = date::local_days;
-
-// types
-
-struct last_spec
-{
-    explicit last_spec() = default;
-};
-
-class day;
-class month;
-class year;
-
-class weekday;
-class weekday_indexed;
-class weekday_last;
-
-class month_day;
-class month_day_last;
-class month_weekday;
-class month_weekday_last;
-
-class year_month;
-
-class year_month_day;
-class year_month_day_last;
-class year_month_weekday;
-class year_month_weekday_last;
-
-// date composition operators
-
-CONSTCD11 year_month operator/(const year& y, const month& m) NOEXCEPT;
-CONSTCD11 year_month operator/(const year& y, int          m) NOEXCEPT;
-
-CONSTCD11 month_day operator/(const day& d, const month& m) NOEXCEPT;
-CONSTCD11 month_day operator/(const day& d, int          m) NOEXCEPT;
-CONSTCD11 month_day operator/(const month& m, const day& d) NOEXCEPT;
-CONSTCD11 month_day operator/(const month& m, int        d) NOEXCEPT;
-CONSTCD11 month_day operator/(int          m, const day& d) NOEXCEPT;
-
-CONSTCD11 month_day_last operator/(const month& m, last_spec) NOEXCEPT;
-CONSTCD11 month_day_last operator/(int          m, last_spec) NOEXCEPT;
-CONSTCD11 month_day_last operator/(last_spec, const month& m) NOEXCEPT;
-CONSTCD11 month_day_last operator/(last_spec, int          m) NOEXCEPT;
-
-CONSTCD11 month_weekday operator/(const month& m, const weekday_indexed& wdi) NOEXCEPT;
-CONSTCD11 month_weekday operator/(int          m, const weekday_indexed& wdi) NOEXCEPT;
-CONSTCD11 month_weekday operator/(const weekday_indexed& wdi, const month& m) NOEXCEPT;
-CONSTCD11 month_weekday operator/(const weekday_indexed& wdi, int          m) NOEXCEPT;
-
-CONSTCD11 month_weekday_last operator/(const month& m, const weekday_last& wdl) NOEXCEPT;
-CONSTCD11 month_weekday_last operator/(int          m, const weekday_last& wdl) NOEXCEPT;
-CONSTCD11 month_weekday_last operator/(const weekday_last& wdl, const month& m) NOEXCEPT;
-CONSTCD11 month_weekday_last operator/(const weekday_last& wdl, int          m) NOEXCEPT;
-
-CONSTCD11 year_month_day operator/(const year_month& ym, const day& d) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const year_month& ym, int        d) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const year& y, const month_day& md) NOEXCEPT;
-CONSTCD11 year_month_day operator/(int         y, const month_day& md) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const month_day& md, const year& y) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const month_day& md, int         y) NOEXCEPT;
-
-CONSTCD11
-    year_month_day_last operator/(const year_month& ym,   last_spec) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(const year& y, const month_day_last& mdl) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(int         y, const month_day_last& mdl) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(const month_day_last& mdl, const year& y) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(const month_day_last& mdl, int         y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const year_month& ym, const weekday_indexed& wdi) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const year&        y, const month_weekday&   mwd) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(int                y, const month_weekday&   mwd) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const month_weekday& mwd, const year&          y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const month_weekday& mwd, int                  y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const year_month& ym, const weekday_last& wdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const year& y, const month_weekday_last& mwdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(int         y, const month_weekday_last& mwdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, const year& y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, int         y) NOEXCEPT;
-
-// Detailed interface
-
-// day
-
-class day
-{
-    unsigned char d_;
-
-public:
-    explicit CONSTCD11 day(unsigned d) NOEXCEPT;
-
-    CONSTCD14 day& operator++()    NOEXCEPT;
-    CONSTCD14 day  operator++(int) NOEXCEPT;
-    CONSTCD14 day& operator--()    NOEXCEPT;
-    CONSTCD14 day  operator--(int) NOEXCEPT;
-
-    CONSTCD14 day& operator+=(const days& d) NOEXCEPT;
-    CONSTCD14 day& operator-=(const days& d) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator< (const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator> (const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const day& x, const day& y) NOEXCEPT;
-
-CONSTCD11 day  operator+(const day&  x, const days& y) NOEXCEPT;
-CONSTCD11 day  operator+(const days& x, const day&  y) NOEXCEPT;
-CONSTCD11 day  operator-(const day&  x, const days& y) NOEXCEPT;
-CONSTCD11 days operator-(const day&  x, const day&  y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const day& d);
-
-// month
-
-class month
-{
-    unsigned char m_;
-
-public:
-    explicit CONSTCD11 month(unsigned m) NOEXCEPT;
-
-    CONSTCD14 month& operator++()    NOEXCEPT;
-    CONSTCD14 month  operator++(int) NOEXCEPT;
-    CONSTCD14 month& operator--()    NOEXCEPT;
-    CONSTCD14 month  operator--(int) NOEXCEPT;
-
-    CONSTCD14 month& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 month& operator-=(const months& m) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator< (const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator> (const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const month& x, const month& y) NOEXCEPT;
-
-CONSTCD14 month  operator+(const month&  x, const months& y) NOEXCEPT;
-CONSTCD14 month  operator+(const months& x,  const month& y) NOEXCEPT;
-CONSTCD14 month  operator-(const month&  x, const months& y) NOEXCEPT;
-CONSTCD14 months operator-(const month&  x,  const month& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month& m);
-
-// year
-
-class year
-{
-    short y_;
-
-public:
-    explicit CONSTCD11 year(int y) NOEXCEPT;
-
-    CONSTCD14 year& operator++()    NOEXCEPT;
-    CONSTCD14 year  operator++(int) NOEXCEPT;
-    CONSTCD14 year& operator--()    NOEXCEPT;
-    CONSTCD14 year  operator--(int) NOEXCEPT;
-
-    CONSTCD14 year& operator+=(const years& y) NOEXCEPT;
-    CONSTCD14 year& operator-=(const years& y) NOEXCEPT;
-
-    CONSTCD11 bool is_leap() const NOEXCEPT;
-
-    CONSTCD11 explicit operator int() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-    static CONSTCD11 year min() NOEXCEPT;
-    static CONSTCD11 year max() NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year& x, const year& y) NOEXCEPT;
-
-CONSTCD11 year  operator+(const year&  x, const years& y) NOEXCEPT;
-CONSTCD11 year  operator+(const years& x, const year&  y) NOEXCEPT;
-CONSTCD11 year  operator-(const year&  x, const years& y) NOEXCEPT;
-CONSTCD11 years operator-(const year&  x, const year&  y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year& y);
-
-// weekday
-
-class weekday
-{
-    unsigned char wd_;
-public:
-    explicit CONSTCD11 weekday(unsigned wd) NOEXCEPT;
-    explicit weekday(int) = delete;
-    CONSTCD11 weekday(const sys_days& dp) NOEXCEPT;
-    CONSTCD11 explicit weekday(const local_days& dp) NOEXCEPT;
-
-    CONSTCD14 weekday& operator++()    NOEXCEPT;
-    CONSTCD14 weekday  operator++(int) NOEXCEPT;
-    CONSTCD14 weekday& operator--()    NOEXCEPT;
-    CONSTCD14 weekday  operator--(int) NOEXCEPT;
-
-    CONSTCD14 weekday& operator+=(const days& d) NOEXCEPT;
-    CONSTCD14 weekday& operator-=(const days& d) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-    CONSTCD11 weekday_indexed operator[](unsigned index) const NOEXCEPT;
-    CONSTCD11 weekday_last    operator[](last_spec)      const NOEXCEPT;
-
-private:
-    static CONSTCD11 unsigned char weekday_from_days(int z) NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday& x, const weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday& x, const weekday& y) NOEXCEPT;
-
-CONSTCD14 weekday operator+(const weekday& x, const days&    y) NOEXCEPT;
-CONSTCD14 weekday operator+(const days&    x, const weekday& y) NOEXCEPT;
-CONSTCD14 weekday operator-(const weekday& x, const days&    y) NOEXCEPT;
-CONSTCD14 days    operator-(const weekday& x, const weekday& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday& wd);
-
-// weekday_indexed
-
-class weekday_indexed
-{
-    unsigned char wd_    : 4;
-    unsigned char index_ : 4;
-
-public:
-    CONSTCD11 weekday_indexed(const islamic::weekday& wd, unsigned index) NOEXCEPT;
-
-    CONSTCD11 islamic::weekday weekday() const NOEXCEPT;
-    CONSTCD11 unsigned index() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_indexed& wdi);
-
-// weekday_last
-
-class weekday_last
-{
-    islamic::weekday wd_;
-
-public:
-    explicit CONSTCD11 weekday_last(const islamic::weekday& wd) NOEXCEPT;
-
-    CONSTCD11 islamic::weekday weekday() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday_last& x, const weekday_last& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday_last& x, const weekday_last& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_last& wdl);
-
-// year_month
-
-class year_month
-{
-    islamic::year  y_;
-    islamic::month m_;
-
-public:
-    CONSTCD11 year_month(const islamic::year& y, const islamic::month& m) NOEXCEPT;
-
-    CONSTCD11 islamic::year  year()  const NOEXCEPT;
-    CONSTCD11 islamic::month month() const NOEXCEPT;
-
-    CONSTCD14 year_month& operator+=(const months& dm) NOEXCEPT;
-    CONSTCD14 year_month& operator-=(const months& dm) NOEXCEPT;
-    CONSTCD14 year_month& operator+=(const years& dy) NOEXCEPT;
-    CONSTCD14 year_month& operator-=(const years& dy) NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_month& x, const year_month& y) NOEXCEPT;
-
-CONSTCD14 year_month operator+(const year_month& ym, const months& dm) NOEXCEPT;
-CONSTCD14 year_month operator+(const months& dm, const year_month& ym) NOEXCEPT;
-CONSTCD14 year_month operator-(const year_month& ym, const months& dm) NOEXCEPT;
-
-CONSTCD11 months operator-(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 year_month operator+(const year_month& ym, const years& dy) NOEXCEPT;
-CONSTCD11 year_month operator+(const years& dy, const year_month& ym) NOEXCEPT;
-CONSTCD11 year_month operator-(const year_month& ym, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month& ym);
-
-// month_day
-
-class month_day
-{
-    islamic::month m_;
-    islamic::day   d_;
-
-public:
-    CONSTCD11 month_day(const islamic::month& m, const islamic::day& d) NOEXCEPT;
-
-    CONSTCD11 islamic::month month() const NOEXCEPT;
-    CONSTCD11 islamic::day   day() const NOEXCEPT;
-
-    CONSTCD14 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator< (const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator> (const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const month_day& x, const month_day& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day& md);
-
-// month_day_last
-
-class month_day_last
-{
-    islamic::month m_;
-
-public:
-    CONSTCD11 explicit month_day_last(const islamic::month& m) NOEXCEPT;
-
-    CONSTCD11 islamic::month month() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator< (const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator> (const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day_last& mdl);
-
-// month_weekday
-
-class month_weekday
-{
-    islamic::month           m_;
-    islamic::weekday_indexed wdi_;
-public:
-    CONSTCD11 month_weekday(const islamic::month& m,
-                            const islamic::weekday_indexed& wdi) NOEXCEPT;
-
-    CONSTCD11 islamic::month           month()           const NOEXCEPT;
-    CONSTCD11 islamic::weekday_indexed weekday_indexed() const NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month_weekday& x, const month_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month_weekday& x, const month_weekday& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday& mwd);
-
-// month_weekday_last
-
-class month_weekday_last
-{
-    islamic::month        m_;
-    islamic::weekday_last wdl_;
-
-public:
-    CONSTCD11 month_weekday_last(const islamic::month& m,
-                                 const islamic::weekday_last& wd) NOEXCEPT;
-
-    CONSTCD11 islamic::month        month()        const NOEXCEPT;
-    CONSTCD11 islamic::weekday_last weekday_last() const NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11
-    bool operator==(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator!=(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday_last& mwdl);
-
-// class year_month_day
-
-class year_month_day
-{
-    islamic::year  y_;
-    islamic::month m_;
-    islamic::day   d_;
-
-public:
-    CONSTCD11 year_month_day(const islamic::year& y, const islamic::month& m,
-                             const islamic::day& d) NOEXCEPT;
-    CONSTCD14 year_month_day(const year_month_day_last& ymdl) NOEXCEPT;
-
-    CONSTCD14 year_month_day(sys_days dp) NOEXCEPT;
-    CONSTCD14 explicit year_month_day(local_days dp) NOEXCEPT;
-
-    CONSTCD14 year_month_day& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day& operator+=(const years& y)  NOEXCEPT;
-    CONSTCD14 year_month_day& operator-=(const years& y)  NOEXCEPT;
-
-    CONSTCD11 islamic::year  year()  const NOEXCEPT;
-    CONSTCD11 islamic::month month() const NOEXCEPT;
-    CONSTCD11 islamic::day   day()   const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD14 bool ok() const NOEXCEPT;
-
-private:
-    static CONSTCD14 year_month_day from_days(days dp) NOEXCEPT;
-    CONSTCD14 days to_days() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-
-CONSTCD14 year_month_day operator+(const year_month_day& ymd, const months& dm) NOEXCEPT;
-CONSTCD14 year_month_day operator+(const months& dm, const year_month_day& ymd) NOEXCEPT;
-CONSTCD14 year_month_day operator-(const year_month_day& ymd, const months& dm) NOEXCEPT;
-CONSTCD11 year_month_day operator+(const year_month_day& ymd, const years& dy)  NOEXCEPT;
-CONSTCD11 year_month_day operator+(const years& dy, const year_month_day& ymd)  NOEXCEPT;
-CONSTCD11 year_month_day operator-(const year_month_day& ymd, const years& dy)  NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day& ymd);
-
-// year_month_day_last
-
-class year_month_day_last
-{
-    islamic::year           y_;
-    islamic::month_day_last mdl_;
-
-public:
-    CONSTCD11 year_month_day_last(const islamic::year& y,
-                                  const islamic::month_day_last& mdl) NOEXCEPT;
-
-    CONSTCD14 year_month_day_last& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day_last& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day_last& operator+=(const years& y)  NOEXCEPT;
-    CONSTCD14 year_month_day_last& operator-=(const years& y)  NOEXCEPT;
-
-    CONSTCD11 islamic::year           year()           const NOEXCEPT;
-    CONSTCD11 islamic::month          month()          const NOEXCEPT;
-    CONSTCD11 islamic::month_day_last month_day_last() const NOEXCEPT;
-    CONSTCD14 islamic::day            day()            const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11
-    bool operator==(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator!=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator< (const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator> (const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator<=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator>=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-
-CONSTCD14
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const months& dm) NOEXCEPT;
-
-CONSTCD14
-year_month_day_last
-operator+(const months& dm, const year_month_day_last& ymdl) NOEXCEPT;
-
-CONSTCD11
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const years& dy) NOEXCEPT;
-
-CONSTCD11
-year_month_day_last
-operator+(const years& dy, const year_month_day_last& ymdl) NOEXCEPT;
-
-CONSTCD14
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const months& dm) NOEXCEPT;
-
-CONSTCD11
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day_last& ymdl);
-
-// year_month_weekday
-
-class year_month_weekday
-{
-    islamic::year            y_;
-    islamic::month           m_;
-    islamic::weekday_indexed wdi_;
-
-public:
-    CONSTCD11 year_month_weekday(const islamic::year& y, const islamic::month& m,
-                                   const islamic::weekday_indexed& wdi) NOEXCEPT;
-    CONSTCD14 year_month_weekday(const sys_days& dp) NOEXCEPT;
-    CONSTCD14 explicit year_month_weekday(const local_days& dp) NOEXCEPT;
-
-    CONSTCD14 year_month_weekday& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday& operator+=(const years& y)  NOEXCEPT;
-    CONSTCD14 year_month_weekday& operator-=(const years& y)  NOEXCEPT;
-
-    CONSTCD11 islamic::year year() const NOEXCEPT;
-    CONSTCD11 islamic::month month() const NOEXCEPT;
-    CONSTCD11 islamic::weekday weekday() const NOEXCEPT;
-    CONSTCD11 unsigned index() const NOEXCEPT;
-    CONSTCD11 islamic::weekday_indexed weekday_indexed() const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD14 bool ok() const NOEXCEPT;
-
-private:
-    static CONSTCD14 year_month_weekday from_days(days dp) NOEXCEPT;
-    CONSTCD14 days to_days() const NOEXCEPT;
-};
-
-CONSTCD11
-    bool operator==(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT;
-CONSTCD11
-    bool operator!=(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const months& dm) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday
-operator+(const months& dm, const year_month_weekday& ymwd) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const years& dy) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator+(const years& dy, const year_month_weekday& ymwd) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const months& dm) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday& ymwdi);
-
-// year_month_weekday_last
-
-class year_month_weekday_last
-{
-    islamic::year y_;
-    islamic::month m_;
-    islamic::weekday_last wdl_;
-
-public:
-    CONSTCD11 year_month_weekday_last(const islamic::year& y, const islamic::month& m,
-                                      const islamic::weekday_last& wdl) NOEXCEPT;
-
-    CONSTCD14 year_month_weekday_last& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday_last& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday_last& operator+=(const years& y) NOEXCEPT;
-    CONSTCD14 year_month_weekday_last& operator-=(const years& y) NOEXCEPT;
-
-    CONSTCD11 islamic::year year() const NOEXCEPT;
-    CONSTCD11 islamic::month month() const NOEXCEPT;
-    CONSTCD11 islamic::weekday weekday() const NOEXCEPT;
-    CONSTCD11 islamic::weekday_last weekday_last() const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-private:
-    CONSTCD14 days to_days() const NOEXCEPT;
-};
-
-CONSTCD11
-bool
-operator==(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT;
-
-CONSTCD11
-bool
-operator!=(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday_last
-operator+(const months& dm, const year_month_weekday_last& ymwdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator+(const years& dy, const year_month_weekday_last& ymwdl) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday_last& ymwdl);
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-inline namespace literals
-{
-
-CONSTCD11 islamic::day  operator "" _d(unsigned long long d) NOEXCEPT;
-CONSTCD11 islamic::year operator "" _y(unsigned long long y) NOEXCEPT;
-
-}  // inline namespace literals
-#endif // !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-//----------------+
-// Implementation |
-//----------------+
-
-// day
-
-CONSTCD11 inline day::day(unsigned d) NOEXCEPT : d_(static_cast<unsigned char>(d)) {}
-CONSTCD14 inline day& day::operator++() NOEXCEPT {++d_; return *this;}
-CONSTCD14 inline day day::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline day& day::operator--() NOEXCEPT {--d_; return *this;}
-CONSTCD14 inline day day::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-CONSTCD14 inline day& day::operator+=(const days& d) NOEXCEPT {*this = *this + d; return *this;}
-CONSTCD14 inline day& day::operator-=(const days& d) NOEXCEPT {*this = *this - d; return *this;}
-CONSTCD11 inline day::operator unsigned() const NOEXCEPT {return d_;}
-CONSTCD11 inline bool day::ok() const NOEXCEPT {return 1 <= d_ && d_ <= 30;}
-
-CONSTCD11
-inline
-bool
-operator==(const day& x, const day& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const day& x, const day& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const day& x, const day& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) < static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const day& x, const day& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const day& x, const day& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const day& x, const day& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-days
-operator-(const day& x, const day& y) NOEXCEPT
-{
-    return days{static_cast<days::rep>(static_cast<unsigned>(x)
-                                     - static_cast<unsigned>(y))};
-}
-
-CONSTCD11
-inline
-day
-operator+(const day& x, const days& y) NOEXCEPT
-{
-    return day{static_cast<unsigned>(x) + static_cast<unsigned>(y.count())};
-}
-
-CONSTCD11
-inline
-day
-operator+(const days& x, const day& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD11
-inline
-day
-operator-(const day& x, const days& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const day& d)
-{
-    date::detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::right);
-    os.width(2);
-    os << static_cast<unsigned>(d);
-    return os;
-}
-
-// month
-
-CONSTCD11 inline month::month(unsigned m) NOEXCEPT : m_(static_cast<decltype(m_)>(m)) {}
-CONSTCD14 inline month& month::operator++() NOEXCEPT {if (++m_ == 13) m_ = 1; return *this;}
-CONSTCD14 inline month month::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline month& month::operator--() NOEXCEPT {if (--m_ == 0) m_ = 12; return *this;}
-CONSTCD14 inline month month::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-
-CONSTCD14
-inline
-month&
-month::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-month&
-month::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD11 inline month::operator unsigned() const NOEXCEPT {return m_;}
-CONSTCD11 inline bool month::ok() const NOEXCEPT {return 1 <= m_ && m_ <= 12;}
-
-CONSTCD11
-inline
-bool
-operator==(const month& x, const month& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month& x, const month& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const month& x, const month& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) < static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const month& x, const month& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const month& x, const month& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const month& x, const month& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD14
-inline
-months
-operator-(const month& x, const month& y) NOEXCEPT
-{
-    auto const d = static_cast<unsigned>(x) - static_cast<unsigned>(y);
-    return months(d <= 11 ? d : d + 12);
-}
-
-CONSTCD14
-inline
-month
-operator+(const month& x, const months& y) NOEXCEPT
-{
-    auto const mu = static_cast<long long>(static_cast<unsigned>(x)) - 1 + y.count();
-    auto const yr = (mu >= 0 ? mu : mu-11) / 12;
-    return month{static_cast<unsigned>(mu - yr * 12 + 1)};
-}
-
-CONSTCD14
-inline
-month
-operator+(const months& x, const month& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD14
-inline
-month
-operator-(const month& x, const months& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month& m)
-{
-    switch (static_cast<unsigned>(m))
-    {
-    case 1:
-        os << "Muharram";
-        break;
-    case 2:
-        os << "Safar";
-        break;
-    case 3:
-        os << "Rabi' al-awwal";
-        break;
-    case 4:
-        os << "Rabi' al-thani";
-        break;
-    case 5:
-        os << "Jumada al-awwal";
-        break;
-    case 6:
-        os << "Jumada al-Thani";
-        break;
-    case 7:
-        os << "Rajab";
-        break;
-    case 8:
-        os << "Sha'ban";
-        break;
-    case 9:
-        os << "Ramadan";
-        break;
-    case 10:
-        os << "Shawwal";
-        break;
-    case 11:
-        os << "Dhu al-Qi'dah";
-        break;
-    case 12:
-        os << "Dhu al-Hijjah";
-        break;
-    default:
-        os << static_cast<unsigned>(m) << " is not a valid month";
-        break;
-    }
-    return os;
-}
-
-// year
-
-CONSTCD11 inline year::year(int y) NOEXCEPT : y_(static_cast<decltype(y_)>(y)) {}
-CONSTCD14 inline year& year::operator++() NOEXCEPT {++y_; return *this;}
-CONSTCD14 inline year year::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline year& year::operator--() NOEXCEPT {--y_; return *this;}
-CONSTCD14 inline year year::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-CONSTCD14 inline year& year::operator+=(const years& y) NOEXCEPT {*this = *this + y; return *this;}
-CONSTCD14 inline year& year::operator-=(const years& y) NOEXCEPT {*this = *this - y; return *this;}
-
-CONSTCD11
-inline
-bool
-year::is_leap() const NOEXCEPT
-{
-    int y = y_ - 1;
-    const int era = (y >= 0 ? y : y-29) / 30;
-    const unsigned yoe = static_cast<unsigned>(y - era * 30);
-    switch (yoe)
-    {
-    case 1:
-    case 4:
-    case 6:
-    case 9:
-    case 12:
-    case 15:
-    case 17:
-    case 20:
-    case 23:
-    case 25:
-    case 28:
-        return true;
-    default:
-        return false;
-    }
-}
-
-CONSTCD11 inline year::operator int() const NOEXCEPT {return y_;}
-CONSTCD11 inline bool year::ok() const NOEXCEPT {return true;}
-
-CONSTCD11
-inline
-year
-year::min() NOEXCEPT
-{
-    return year{std::numeric_limits<short>::min()};
-}
-
-CONSTCD11
-inline
-year
-year::max() NOEXCEPT
-{
-    return year{std::numeric_limits<short>::max()};
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year& x, const year& y) NOEXCEPT
-{
-    return static_cast<int>(x) == static_cast<int>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year& x, const year& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year& x, const year& y) NOEXCEPT
-{
-    return static_cast<int>(x) < static_cast<int>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year& x, const year& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year& x, const year& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year& x, const year& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-years
-operator-(const year& x, const year& y) NOEXCEPT
-{
-    return years{static_cast<int>(x) - static_cast<int>(y)};
-}
-
-CONSTCD11
-inline
-year
-operator+(const year& x, const years& y) NOEXCEPT
-{
-    return year{static_cast<int>(x) + y.count()};
-}
-
-CONSTCD11
-inline
-year
-operator+(const years& x, const year& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD11
-inline
-year
-operator-(const year& x, const years& y) NOEXCEPT
-{
-    return year{static_cast<int>(x) - y.count()};
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year& y)
-{
-    date::detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::internal);
-    os.width(4 + (y < year{0}));
-    os << static_cast<int>(y);
-    return os;
-}
-
-// weekday
-
-CONSTCD11
-inline
-unsigned char
-weekday::weekday_from_days(int z) NOEXCEPT
-{
-    return static_cast<unsigned char>(static_cast<unsigned>(
-        z >= -4 ? (z+4) % 7 : (z+5) % 7 + 6));
-}
-
-CONSTCD11
-inline
-weekday::weekday(unsigned wd) NOEXCEPT
-    : wd_(static_cast<decltype(wd_)>(wd))
-    {}
-
-CONSTCD11
-inline
-weekday::weekday(const sys_days& dp) NOEXCEPT
-    : wd_(weekday_from_days(dp.time_since_epoch().count()))
-    {}
-
-CONSTCD11
-inline
-weekday::weekday(const local_days& dp) NOEXCEPT
-    : wd_(weekday_from_days(dp.time_since_epoch().count()))
-    {}
-
-CONSTCD14 inline weekday& weekday::operator++() NOEXCEPT {if (++wd_ == 7) wd_ = 0; return *this;}
-CONSTCD14 inline weekday weekday::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline weekday& weekday::operator--() NOEXCEPT {if (wd_-- == 0) wd_ = 6; return *this;}
-CONSTCD14 inline weekday weekday::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-
-CONSTCD14
-inline
-weekday&
-weekday::operator+=(const days& d) NOEXCEPT
-{
-    *this = *this + d;
-    return *this;
-}
-
-CONSTCD14
-inline
-weekday&
-weekday::operator-=(const days& d) NOEXCEPT
-{
-    *this = *this - d;
-    return *this;
-}
-
-CONSTCD11
-inline
-weekday::operator unsigned() const NOEXCEPT
-{
-    return static_cast<unsigned>(wd_);
-}
-
-CONSTCD11 inline bool weekday::ok() const NOEXCEPT {return wd_ <= 6;}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday& x, const weekday& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday& x, const weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD14
-inline
-days
-operator-(const weekday& x, const weekday& y) NOEXCEPT
-{
-    auto const diff = static_cast<unsigned>(x) - static_cast<unsigned>(y);
-    return days{diff <= 6 ? diff : diff + 7};
-}
-
-CONSTCD14
-inline
-weekday
-operator+(const weekday& x, const days& y) NOEXCEPT
-{
-    auto const wdu = static_cast<long long>(static_cast<unsigned>(x)) + y.count();
-    auto const wk = (wdu >= 0 ? wdu : wdu-6) / 7;
-    return weekday{static_cast<unsigned>(wdu - wk * 7)};
-}
-
-CONSTCD14
-inline
-weekday
-operator+(const days& x, const weekday& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD14
-inline
-weekday
-operator-(const weekday& x, const days& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday& wd)
-{
-    switch (static_cast<unsigned>(wd))
-    {
-    case 0:
-        os << "al-Aḥad";
-        break;
-    case 1:
-        os << "al-Ithnayn";
-        break;
-    case 2:
-        os << "ath-Thulāthā’";
-        break;
-    case 3:
-        os << "al-Arba‘ā’";
-        break;
-    case 4:
-        os << "al-Khamīs";
-        break;
-    case 5:
-        os << "al-Jum‘ah";
-        break;
-    case 6:
-        os << "as-Sabt";
-        break;
-    default:
-        os << static_cast<unsigned>(wd) << " is not a valid weekday";
-        break;
-    }
-    return os;
-}
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-inline namespace literals
-{
-
-CONSTCD11
-inline
-islamic::day
-operator "" _d(unsigned long long d) NOEXCEPT
-{
-    return islamic::day{static_cast<unsigned>(d)};
-}
-
-CONSTCD11
-inline
-islamic::year
-operator "" _y(unsigned long long y) NOEXCEPT
-{
-    return islamic::year(static_cast<int>(y));
-}
-#endif  // !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-CONSTDATA islamic::last_spec last{};
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-}  // inline namespace literals
-#endif
-
-// weekday_indexed
-
-CONSTCD11
-inline
-weekday
-weekday_indexed::weekday() const NOEXCEPT
-{
-    return islamic::weekday{static_cast<unsigned>(wd_)};
-}
-
-CONSTCD11 inline unsigned weekday_indexed::index() const NOEXCEPT {return index_;}
-
-CONSTCD11
-inline
-bool
-weekday_indexed::ok() const NOEXCEPT
-{
-    return weekday().ok() && 1 <= index_ && index_ <= 5;
-}
-
-CONSTCD11
-inline
-weekday_indexed::weekday_indexed(const islamic::weekday& wd, unsigned index) NOEXCEPT
-    : wd_(static_cast<decltype(wd_)>(static_cast<unsigned>(wd)))
-    , index_(static_cast<decltype(index_)>(index))
-    {}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_indexed& wdi)
-{
-    return os << wdi.weekday() << '[' << wdi.index() << ']';
-}
-
-CONSTCD11
-inline
-weekday_indexed
-weekday::operator[](unsigned index) const NOEXCEPT
-{
-    return {*this, index};
-}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT
-{
-    return x.weekday() == y.weekday() && x.index() == y.index();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-// weekday_last
-
-CONSTCD11 inline islamic::weekday weekday_last::weekday() const NOEXCEPT {return wd_;}
-CONSTCD11 inline bool weekday_last::ok() const NOEXCEPT {return wd_.ok();}
-CONSTCD11 inline weekday_last::weekday_last(const islamic::weekday& wd) NOEXCEPT : wd_(wd) {}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday_last& x, const weekday_last& y) NOEXCEPT
-{
-    return x.weekday() == y.weekday();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday_last& x, const weekday_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_last& wdl)
-{
-    return os << wdl.weekday() << "[last]";
-}
-
-CONSTCD11
-inline
-weekday_last
-weekday::operator[](last_spec) const NOEXCEPT
-{
-    return weekday_last{*this};
-}
-
-// year_month
-
-CONSTCD11
-inline
-year_month::year_month(const islamic::year& y, const islamic::month& m) NOEXCEPT
-    : y_(y)
-    , m_(m)
-    {}
-
-CONSTCD11 inline year year_month::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline bool year_month::ok() const NOEXCEPT {return y_.ok() && m_.ok();}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator+=(const months& dm) NOEXCEPT
-{
-    *this = *this + dm;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator-=(const months& dm) NOEXCEPT
-{
-    *this = *this - dm;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator+=(const years& dy) NOEXCEPT
-{
-    *this = *this + dy;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator-=(const years& dy) NOEXCEPT
-{
-    *this = *this - dy;
-    return *this;
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.month() < y.month()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD14
-inline
-year_month
-operator+(const year_month& ym, const months& dm) NOEXCEPT
-{
-    auto dmi = static_cast<int>(static_cast<unsigned>(ym.month())) - 1 + dm.count();
-    auto dy = (dmi >= 0 ? dmi : dmi-11) / 12;
-    dmi = dmi - dy * 12 + 1;
-    return (ym.year() + years(dy)) / month(static_cast<unsigned>(dmi));
-}
-
-CONSTCD14
-inline
-year_month
-operator+(const months& dm, const year_month& ym) NOEXCEPT
-{
-    return ym + dm;
-}
-
-CONSTCD14
-inline
-year_month
-operator-(const year_month& ym, const months& dm) NOEXCEPT
-{
-    return ym + -dm;
-}
-
-CONSTCD11
-inline
-months
-operator-(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return (x.year() - y.year()) +
-            months(static_cast<unsigned>(x.month()) - static_cast<unsigned>(y.month()));
-}
-
-CONSTCD11
-inline
-year_month
-operator+(const year_month& ym, const years& dy) NOEXCEPT
-{
-    return (ym.year() + dy) / ym.month();
-}
-
-CONSTCD11
-inline
-year_month
-operator+(const years& dy, const year_month& ym) NOEXCEPT
-{
-    return ym + dy;
-}
-
-CONSTCD11
-inline
-year_month
-operator-(const year_month& ym, const years& dy) NOEXCEPT
-{
-    return ym + -dy;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month& ym)
-{
-    return os << ym.year() << '/' << ym.month();
-}
-
-// month_day
-
-CONSTCD11
-inline
-month_day::month_day(const islamic::month& m, const islamic::day& d) NOEXCEPT
-    : m_(m)
-    , d_(d)
-    {}
-
-CONSTCD11 inline islamic::month month_day::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline islamic::day month_day::day() const NOEXCEPT {return d_;}
-
-CONSTCD14
-inline
-bool
-month_day::ok() const NOEXCEPT
-{
-    CONSTDATA islamic::day d[] =
-        {30_d, 29_d, 30_d, 29_d, 30_d, 29_d, 30_d, 29_d, 30_d, 29_d, 30_d, 30_d};
-    return m_.ok() && 1_d <= d_ && d_ <= d[static_cast<unsigned>(m_)-1];
-}
-
-CONSTCD11
-inline
-bool
-operator==(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return x.month() == y.month() && x.day() == y.day();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return x.month() < y.month() ? true
-        : (x.month() > y.month() ? false
-        : (x.day() < y.day()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day& md)
-{
-    return os << md.month() << '/' << md.day();
-}
-
-// month_day_last
-
-CONSTCD11 inline month month_day_last::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline bool month_day_last::ok() const NOEXCEPT {return m_.ok();}
-CONSTCD11 inline month_day_last::month_day_last(const islamic::month& m) NOEXCEPT : m_(m) {}
-
-CONSTCD11
-inline
-bool
-operator==(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return x.month() == y.month();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return x.month() < y.month();
-}
-
-CONSTCD11
-inline
-bool
-operator>(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day_last& mdl)
-{
-    return os << mdl.month() << "/last";
-}
-
-// month_weekday
-
-CONSTCD11
-inline
-month_weekday::month_weekday(const islamic::month& m,
-                             const islamic::weekday_indexed& wdi) NOEXCEPT
-    : m_(m)
-    , wdi_(wdi)
-    {}
-
-CONSTCD11 inline month month_weekday::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday_indexed
-month_weekday::weekday_indexed() const NOEXCEPT
-{
-    return wdi_;
-}
-
-CONSTCD11
-inline
-bool
-month_weekday::ok() const NOEXCEPT
-{
-    return m_.ok() && wdi_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const month_weekday& x, const month_weekday& y) NOEXCEPT
-{
-    return x.month() == y.month() && x.weekday_indexed() == y.weekday_indexed();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_weekday& x, const month_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday& mwd)
-{
-    return os << mwd.month() << '/' << mwd.weekday_indexed();
-}
-
-// month_weekday_last
-
-CONSTCD11
-inline
-month_weekday_last::month_weekday_last(const islamic::month& m,
-                                       const islamic::weekday_last& wdl) NOEXCEPT
-    : m_(m)
-    , wdl_(wdl)
-    {}
-
-CONSTCD11 inline month month_weekday_last::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday_last
-month_weekday_last::weekday_last() const NOEXCEPT
-{
-    return wdl_;
-}
-
-CONSTCD11
-inline
-bool
-month_weekday_last::ok() const NOEXCEPT
-{
-    return m_.ok() && wdl_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT
-{
-    return x.month() == y.month() && x.weekday_last() == y.weekday_last();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday_last& mwdl)
-{
-    return os << mwdl.month() << '/' << mwdl.weekday_last();
-}
-
-// year_month_day_last
-
-CONSTCD11
-inline
-year_month_day_last::year_month_day_last(const islamic::year& y,
-                                         const islamic::month_day_last& mdl) NOEXCEPT
-    : y_(y)
-    , mdl_(mdl)
-    {}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_month_day_last::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_day_last::month() const NOEXCEPT {return mdl_.month();}
-
-CONSTCD11
-inline
-month_day_last
-year_month_day_last::month_day_last() const NOEXCEPT
-{
-    return mdl_;
-}
-
-CONSTCD14
-inline
-day
-year_month_day_last::day() const NOEXCEPT
-{
-    CONSTDATA islamic::day d[] =
-        {30_d, 29_d, 30_d, 29_d, 30_d, 29_d, 30_d, 29_d, 30_d, 29_d, 30_d, 29_d};
-    return month() != islamic::month(12) || !y_.is_leap() ?
-               d[static_cast<unsigned>(month())-1] : 30_d;
-}
-
-CONSTCD14
-inline
-year_month_day_last::operator sys_days() const NOEXCEPT
-{
-    return sys_days(year()/month()/day());
-}
-
-CONSTCD14
-inline
-year_month_day_last::operator local_days() const NOEXCEPT
-{
-    return local_days(year()/month()/day());
-}
-
-CONSTCD11
-inline
-bool
-year_month_day_last::ok() const NOEXCEPT
-{
-    return y_.ok() && mdl_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month_day_last() == y.month_day_last();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.month_day_last() < y.month_day_last()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day_last& ymdl)
-{
-    return os << ymdl.year() << '/' << ymdl.month_day_last();
-}
-
-CONSTCD14
-inline
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const months& dm) NOEXCEPT
-{
-    return (ymdl.year() / ymdl.month() + dm) / last;
-}
-
-CONSTCD14
-inline
-year_month_day_last
-operator+(const months& dm, const year_month_day_last& ymdl) NOEXCEPT
-{
-    return ymdl + dm;
-}
-
-CONSTCD14
-inline
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const months& dm) NOEXCEPT
-{
-    return ymdl + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const years& dy) NOEXCEPT
-{
-    return {ymdl.year()+dy, ymdl.month_day_last()};
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator+(const years& dy, const year_month_day_last& ymdl) NOEXCEPT
-{
-    return ymdl + dy;
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const years& dy) NOEXCEPT
-{
-    return ymdl + (-dy);
-}
-
-// year_month_day
-
-CONSTCD11
-inline
-year_month_day::year_month_day(const islamic::year& y, const islamic::month& m,
-                               const islamic::day& d) NOEXCEPT
-    : y_(y)
-    , m_(m)
-    , d_(d)
-    {}
-
-CONSTCD14
-inline
-year_month_day::year_month_day(const year_month_day_last& ymdl) NOEXCEPT
-    : y_(ymdl.year())
-    , m_(ymdl.month())
-    , d_(ymdl.day())
-    {}
-
-CONSTCD14
-inline
-year_month_day::year_month_day(sys_days dp) NOEXCEPT
-    : year_month_day(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_month_day::year_month_day(local_days dp) NOEXCEPT
-    : year_month_day(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD11 inline year year_month_day::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_day::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline day year_month_day::day() const NOEXCEPT {return d_;}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD14
-inline
-days
-year_month_day::to_days() const NOEXCEPT
-{
-    static_assert(std::numeric_limits<unsigned>::digits >= 18,
-             "This algorithm has not been ported to a 16 bit unsigned integer");
-    static_assert(std::numeric_limits<int>::digits >= 20,
-             "This algorithm has not been ported to a 16 bit signed integer");
-    auto const y = static_cast<int>(y_) - 1;
-    auto const m = static_cast<unsigned>(m_);
-    auto const d = static_cast<unsigned>(d_);
-    auto const era = (y >= 0 ? y : y-29) / 30;
-    auto const yoe = static_cast<unsigned>(y - era * 30);      // [0, 29]
-    auto const doy = 29*(m-1) + m/2 + d-1;                     // [0, 354]
-    auto const doe = yoe * 354 + (11*(yoe+1)+3)/30 + doy;      // [0, 10630]
-    return days{era * 10631 + static_cast<int>(doe) - 492148};
-}
-
-CONSTCD14
-inline
-year_month_day::operator sys_days() const NOEXCEPT
-{
-    return sys_days{to_days()};
-}
-
-CONSTCD14
-inline
-year_month_day::operator local_days() const NOEXCEPT
-{
-    return local_days{to_days()};
-}
-
-CONSTCD14
-inline
-bool
-year_month_day::ok() const NOEXCEPT
-{
-    if (!(y_.ok() && m_.ok()))
-        return false;
-    return 1_d <= d_ && d_ <= (y_/m_/last).day();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month() && x.day() == y.day();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.month() < y.month() ? true
-        : (x.month() > y.month() ? false
-        : (x.day() < y.day()))));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day& ymd)
-{
-    date::detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::right);
-    os << ymd.year() << '-';
-    os.width(2);
-    os << static_cast<unsigned>(ymd.month()) << '-';
-    os << ymd.day();
-    return os;
-}
-
-CONSTCD14
-inline
-year_month_day
-year_month_day::from_days(days dp) NOEXCEPT
-{
-    static_assert(std::numeric_limits<unsigned>::digits >= 18,
-             "This algorithm has not been ported to a 16 bit unsigned integer");
-    static_assert(std::numeric_limits<int>::digits >= 20,
-             "This algorithm has not been ported to a 16 bit signed integer");
-    auto const z = dp.count() + 492148;
-    auto const era = (z >= 0 ? z : z - 10630) / 10631;
-    auto const doe = static_cast<unsigned>(z - era * 10631);         // [0, 10630]
-    auto const yoe = (30*doe + 10646)/10631 - 1;                     // [0, 29]
-    auto const y = static_cast<sys_days::rep>(yoe) + era * 30 + 1;
-    auto const doy = doe - (yoe * 354 + (11*(yoe+1)+3)/30);          // [0, 354]
-    auto const m = (11*doy + 330) / 325;                             // [1, 12]
-    auto const d = doy - (29*(m-1) + m/2) + 1;                       // [1, 30]
-    return year_month_day{islamic::year{y}, islamic::month(m), islamic::day(d)};
-}
-
-CONSTCD14
-inline
-year_month_day
-operator+(const year_month_day& ymd, const months& dm) NOEXCEPT
-{
-    return (ymd.year() / ymd.month() + dm) / ymd.day();
-}
-
-CONSTCD14
-inline
-year_month_day
-operator+(const months& dm, const year_month_day& ymd) NOEXCEPT
-{
-    return ymd + dm;
-}
-
-CONSTCD14
-inline
-year_month_day
-operator-(const year_month_day& ymd, const months& dm) NOEXCEPT
-{
-    return ymd + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_day
-operator+(const year_month_day& ymd, const years& dy) NOEXCEPT
-{
-    return (ymd.year() + dy) / ymd.month() / ymd.day();
-}
-
-CONSTCD11
-inline
-year_month_day
-operator+(const years& dy, const year_month_day& ymd) NOEXCEPT
-{
-    return ymd + dy;
-}
-
-CONSTCD11
-inline
-year_month_day
-operator-(const year_month_day& ymd, const years& dy) NOEXCEPT
-{
-    return ymd + (-dy);
-}
-
-// year_month_weekday
-
-CONSTCD11
-inline
-year_month_weekday::year_month_weekday(const islamic::year& y, const islamic::month& m,
-                                       const islamic::weekday_indexed& wdi)
-        NOEXCEPT
-    : y_(y)
-    , m_(m)
-    , wdi_(wdi)
-    {}
-
-CONSTCD14
-inline
-year_month_weekday::year_month_weekday(const sys_days& dp) NOEXCEPT
-    : year_month_weekday(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_month_weekday::year_month_weekday(const local_days& dp) NOEXCEPT
-    : year_month_weekday(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_month_weekday::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_weekday::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday
-year_month_weekday::weekday() const NOEXCEPT
-{
-    return wdi_.weekday();
-}
-
-CONSTCD11
-inline
-unsigned
-year_month_weekday::index() const NOEXCEPT
-{
-    return wdi_.index();
-}
-
-CONSTCD11
-inline
-weekday_indexed
-year_month_weekday::weekday_indexed() const NOEXCEPT
-{
-    return wdi_;
-}
-
-CONSTCD14
-inline
-year_month_weekday::operator sys_days() const NOEXCEPT
-{
-    return sys_days{to_days()};
-}
-
-CONSTCD14
-inline
-year_month_weekday::operator local_days() const NOEXCEPT
-{
-    return local_days{to_days()};
-}
-
-CONSTCD14
-inline
-bool
-year_month_weekday::ok() const NOEXCEPT
-{
-    if (!y_.ok() || !m_.ok() || !wdi_.weekday().ok() || wdi_.index() < 1)
-        return false;
-    if (wdi_.index() <= 4)
-        return true;
-    auto d2 = wdi_.weekday() - islamic::weekday(y_/m_/1) + days((wdi_.index()-1)*7 + 1);
-    return static_cast<unsigned>(d2.count()) <= static_cast<unsigned>((y_/m_/last).day());
-}
-
-CONSTCD14
-inline
-year_month_weekday
-year_month_weekday::from_days(days d) NOEXCEPT
-{
-    sys_days dp{d};
-    auto const wd = islamic::weekday(dp);
-    auto const ymd = year_month_day(dp);
-    return {ymd.year(), ymd.month(), wd[(static_cast<unsigned>(ymd.day())-1)/7+1]};
-}
-
-CONSTCD14
-inline
-days
-year_month_weekday::to_days() const NOEXCEPT
-{
-    auto d = sys_days(y_/m_/1);
-    return (d + (wdi_.weekday() - islamic::weekday(d) + days{(wdi_.index()-1)*7})
-           ).time_since_epoch();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month() &&
-           x.weekday_indexed() == y.weekday_indexed();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday& ymwdi)
-{
-    return os << ymwdi.year() << '/' << ymwdi.month()
-              << '/' << ymwdi.weekday_indexed();
-}
-
-CONSTCD14
-inline
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const months& dm) NOEXCEPT
-{
-    return (ymwd.year() / ymwd.month() + dm) / ymwd.weekday_indexed();
-}
-
-CONSTCD14
-inline
-year_month_weekday
-operator+(const months& dm, const year_month_weekday& ymwd) NOEXCEPT
-{
-    return ymwd + dm;
-}
-
-CONSTCD14
-inline
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const months& dm) NOEXCEPT
-{
-    return ymwd + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const years& dy) NOEXCEPT
-{
-    return {ymwd.year()+dy, ymwd.month(), ymwd.weekday_indexed()};
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator+(const years& dy, const year_month_weekday& ymwd) NOEXCEPT
-{
-    return ymwd + dy;
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const years& dy) NOEXCEPT
-{
-    return ymwd + (-dy);
-}
-
-// year_month_weekday_last
-
-CONSTCD11
-inline
-year_month_weekday_last::year_month_weekday_last(const islamic::year& y,
-                                                 const islamic::month& m,
-                                                 const islamic::weekday_last& wdl) NOEXCEPT
-    : y_(y)
-    , m_(m)
-    , wdl_(wdl)
-    {}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_month_weekday_last::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_weekday_last::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday
-year_month_weekday_last::weekday() const NOEXCEPT
-{
-    return wdl_.weekday();
-}
-
-CONSTCD11
-inline
-weekday_last
-year_month_weekday_last::weekday_last() const NOEXCEPT
-{
-    return wdl_;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last::operator sys_days() const NOEXCEPT
-{
-    return sys_days{to_days()};
-}
-
-CONSTCD14
-inline
-year_month_weekday_last::operator local_days() const NOEXCEPT
-{
-    return local_days{to_days()};
-}
-
-CONSTCD11
-inline
-bool
-year_month_weekday_last::ok() const NOEXCEPT
-{
-    return y_.ok() && m_.ok() && wdl_.ok();
-}
-
-CONSTCD14
-inline
-days
-year_month_weekday_last::to_days() const NOEXCEPT
-{
-    auto const d = sys_days(y_/m_/last);
-    return (d - (islamic::weekday{d} - wdl_.weekday())).time_since_epoch();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month() &&
-           x.weekday_last() == y.weekday_last();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday_last& ymwdl)
-{
-    return os << ymwdl.year() << '/' << ymwdl.month() << '/' << ymwdl.weekday_last();
-}
-
-CONSTCD14
-inline
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT
-{
-    return (ymwdl.year() / ymwdl.month() + dm) / ymwdl.weekday_last();
-}
-
-CONSTCD14
-inline
-year_month_weekday_last
-operator+(const months& dm, const year_month_weekday_last& ymwdl) NOEXCEPT
-{
-    return ymwdl + dm;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT
-{
-    return ymwdl + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT
-{
-    return {ymwdl.year()+dy, ymwdl.month(), ymwdl.weekday_last()};
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator+(const years& dy, const year_month_weekday_last& ymwdl) NOEXCEPT
-{
-    return ymwdl + dy;
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT
-{
-    return ymwdl + (-dy);
-}
-
-// year_month from operator/()
-
-CONSTCD11
-inline
-year_month
-operator/(const year& y, const month& m) NOEXCEPT
-{
-    return {y, m};
-}
-
-CONSTCD11
-inline
-year_month
-operator/(const year& y, int   m) NOEXCEPT
-{
-    return y / month(static_cast<unsigned>(m));
-}
-
-// month_day from operator/()
-
-CONSTCD11
-inline
-month_day
-operator/(const month& m, const day& d) NOEXCEPT
-{
-    return {m, d};
-}
-
-CONSTCD11
-inline
-month_day
-operator/(const day& d, const month& m) NOEXCEPT
-{
-    return m / d;
-}
-
-CONSTCD11
-inline
-month_day
-operator/(const month& m, int d) NOEXCEPT
-{
-    return m / day(static_cast<unsigned>(d));
-}
-
-CONSTCD11
-inline
-month_day
-operator/(int m, const day& d) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m)) / d;
-}
-
-CONSTCD11 inline month_day operator/(const day& d, int m) NOEXCEPT {return m / d;}
-
-// month_day_last from operator/()
-
-CONSTCD11
-inline
-month_day_last
-operator/(const month& m, last_spec) NOEXCEPT
-{
-    return month_day_last{m};
-}
-
-CONSTCD11
-inline
-month_day_last
-operator/(last_spec, const month& m) NOEXCEPT
-{
-    return m/last;
-}
-
-CONSTCD11
-inline
-month_day_last
-operator/(int m, last_spec) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m))/last;
-}
-
-CONSTCD11
-inline
-month_day_last
-operator/(last_spec, int m) NOEXCEPT
-{
-    return m/last;
-}
-
-// month_weekday from operator/()
-
-CONSTCD11
-inline
-month_weekday
-operator/(const month& m, const weekday_indexed& wdi) NOEXCEPT
-{
-    return {m, wdi};
-}
-
-CONSTCD11
-inline
-month_weekday
-operator/(const weekday_indexed& wdi, const month& m) NOEXCEPT
-{
-    return m / wdi;
-}
-
-CONSTCD11
-inline
-month_weekday
-operator/(int m, const weekday_indexed& wdi) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m)) / wdi;
-}
-
-CONSTCD11
-inline
-month_weekday
-operator/(const weekday_indexed& wdi, int m) NOEXCEPT
-{
-    return m / wdi;
-}
-
-// month_weekday_last from operator/()
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(const month& m, const weekday_last& wdl) NOEXCEPT
-{
-    return {m, wdl};
-}
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(const weekday_last& wdl, const month& m) NOEXCEPT
-{
-    return m / wdl;
-}
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(int m, const weekday_last& wdl) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m)) / wdl;
-}
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(const weekday_last& wdl, int m) NOEXCEPT
-{
-    return m / wdl;
-}
-
-// year_month_day from operator/()
-
-CONSTCD11
-inline
-year_month_day
-operator/(const year_month& ym, const day& d) NOEXCEPT
-{
-    return {ym.year(), ym.month(), d};
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const year_month& ym, int d)  NOEXCEPT
-{
-    return ym / day(static_cast<unsigned>(d));
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const year& y, const month_day& md) NOEXCEPT
-{
-    return y / md.month() / md.day();
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(int y, const month_day& md) NOEXCEPT
-{
-    return year(y) / md;
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const month_day& md, const year& y)  NOEXCEPT
-{
-    return y / md;
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const month_day& md, int y) NOEXCEPT
-{
-    return year(y) / md;
-}
-
-// year_month_day_last from operator/()
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const year_month& ym, last_spec) NOEXCEPT
-{
-    return {ym.year(), month_day_last{ym.month()}};
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const year& y, const month_day_last& mdl) NOEXCEPT
-{
-    return {y, mdl};
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(int y, const month_day_last& mdl) NOEXCEPT
-{
-    return year(y) / mdl;
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const month_day_last& mdl, const year& y) NOEXCEPT
-{
-    return y / mdl;
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const month_day_last& mdl, int y) NOEXCEPT
-{
-    return year(y) / mdl;
-}
-
-// year_month_weekday from operator/()
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const year_month& ym, const weekday_indexed& wdi) NOEXCEPT
-{
-    return {ym.year(), ym.month(), wdi};
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const year& y, const month_weekday& mwd) NOEXCEPT
-{
-    return {y, mwd.month(), mwd.weekday_indexed()};
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(int y, const month_weekday& mwd) NOEXCEPT
-{
-    return year(y) / mwd;
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const month_weekday& mwd, const year& y) NOEXCEPT
-{
-    return y / mwd;
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const month_weekday& mwd, int y) NOEXCEPT
-{
-    return year(y) / mwd;
-}
-
-// year_month_weekday_last from operator/()
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const year_month& ym, const weekday_last& wdl) NOEXCEPT
-{
-    return {ym.year(), ym.month(), wdl};
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const year& y, const month_weekday_last& mwdl) NOEXCEPT
-{
-    return {y, mwdl.month(), mwdl.weekday_last()};
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(int y, const month_weekday_last& mwdl) NOEXCEPT
-{
-    return year(y) / mwdl;
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, const year& y) NOEXCEPT
-{
-    return y / mwdl;
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, int y) NOEXCEPT
-{
-    return year(y) / mwdl;
-}
-
-}  // namespace islamic
-
-#endif  // ISLAMIC_H
diff --git a/thirdparty/date/include/date/iso_week.h b/thirdparty/date/include/date/iso_week.h
deleted file mode 100644
index 5bbeb0c..0000000
--- a/thirdparty/date/include/date/iso_week.h
+++ /dev/null
@@ -1,1745 +0,0 @@
-#ifndef ISO_WEEK_H
-#define ISO_WEEK_H
-
-// The MIT License (MIT)
-//
-// Copyright (c) 2015, 2016, 2017 Howard Hinnant
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-
-#include "date.h"
-
-#include <climits>
-
-namespace iso_week
-{
-
-// y/wn/wd
-// wn/wd/y
-// wd/wn/y
-
-using days = date::days;
-using weeks = date::weeks;
-using years = date::years;
-
-// time_point
-
-using sys_days = date::sys_days;
-using local_days = date::local_days;
-
-// types
-
-struct last_week
-{
-    explicit last_week() = default;
-};
-
-class weekday;
-class weeknum;
-class year;
-
-class year_weeknum;
-class year_lastweek;
-class weeknum_weekday;
-class lastweek_weekday;
-
-class year_weeknum_weekday;
-class year_lastweek_weekday;
-
-// date composition operators
-
-CONSTCD11 year_weeknum operator/(const year& y, const weeknum& wn) NOEXCEPT;
-CONSTCD11 year_weeknum operator/(const year& y, int            wn) NOEXCEPT;
-
-CONSTCD11 year_lastweek operator/(const year& y, last_week      wn) NOEXCEPT;
-
-CONSTCD11 weeknum_weekday operator/(const weeknum& wn, const weekday& wd) NOEXCEPT;
-CONSTCD11 weeknum_weekday operator/(const weeknum& wn, int            wd) NOEXCEPT;
-CONSTCD11 weeknum_weekday operator/(const weekday& wd, const weeknum& wn) NOEXCEPT;
-CONSTCD11 weeknum_weekday operator/(const weekday& wd, int            wn) NOEXCEPT;
-
-CONSTCD11 lastweek_weekday operator/(const last_week& wn, const weekday& wd) NOEXCEPT;
-CONSTCD11 lastweek_weekday operator/(const last_week& wn, int            wd) NOEXCEPT;
-CONSTCD11 lastweek_weekday operator/(const weekday& wd, const last_week& wn) NOEXCEPT;
-
-CONSTCD11 year_weeknum_weekday operator/(const year_weeknum& ywn, const weekday& wd) NOEXCEPT;
-CONSTCD11 year_weeknum_weekday operator/(const year_weeknum& ywn, int            wd) NOEXCEPT;
-CONSTCD11 year_weeknum_weekday operator/(const weeknum_weekday& wnwd, const year& y) NOEXCEPT;
-CONSTCD11 year_weeknum_weekday operator/(const weeknum_weekday& wnwd, int         y) NOEXCEPT;
-
-CONSTCD11 year_lastweek_weekday operator/(const year_lastweek& ylw, const weekday& wd) NOEXCEPT;
-CONSTCD11 year_lastweek_weekday operator/(const year_lastweek& ylw, int            wd) NOEXCEPT;
-
-CONSTCD11 year_lastweek_weekday operator/(const lastweek_weekday& lwwd, const year& y) NOEXCEPT;
-CONSTCD11 year_lastweek_weekday operator/(const lastweek_weekday& lwwd, int         y) NOEXCEPT;
-
-// weekday
-
-class weekday
-{
-    unsigned char wd_;
-public:
-    explicit CONSTCD11 weekday(unsigned wd) NOEXCEPT;
-    CONSTCD11 weekday(date::weekday wd) NOEXCEPT;
-    explicit weekday(int) = delete;
-    CONSTCD11 weekday(const sys_days& dp) NOEXCEPT;
-    CONSTCD11 explicit weekday(const local_days& dp) NOEXCEPT;
-
-    weekday& operator++()    NOEXCEPT;
-    weekday  operator++(int) NOEXCEPT;
-    weekday& operator--()    NOEXCEPT;
-    weekday  operator--(int) NOEXCEPT;
-
-    weekday& operator+=(const days& d) NOEXCEPT;
-    weekday& operator-=(const days& d) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 operator date::weekday() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-private:
-    static CONSTCD11 unsigned char weekday_from_days(int z) NOEXCEPT;
-    static CONSTCD11 unsigned char to_iso_encoding(unsigned char) NOEXCEPT;
-    static CONSTCD11 unsigned from_iso_encoding(unsigned) NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday& x, const weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday& x, const weekday& y) NOEXCEPT;
-
-CONSTCD14 weekday operator+(const weekday& x, const days&    y) NOEXCEPT;
-CONSTCD14 weekday operator+(const days&    x, const weekday& y) NOEXCEPT;
-CONSTCD14 weekday operator-(const weekday& x, const days&    y) NOEXCEPT;
-CONSTCD14 days    operator-(const weekday& x, const weekday& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday& wd);
-
-// year
-
-class year
-{
-    short y_;
-
-public:
-    explicit CONSTCD11 year(int y) NOEXCEPT;
-
-    year& operator++()    NOEXCEPT;
-    year  operator++(int) NOEXCEPT;
-    year& operator--()    NOEXCEPT;
-    year  operator--(int) NOEXCEPT;
-
-    year& operator+=(const years& y) NOEXCEPT;
-    year& operator-=(const years& y) NOEXCEPT;
-
-    CONSTCD11 explicit operator int() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-    static CONSTCD11 year min() NOEXCEPT;
-    static CONSTCD11 year max() NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year& x, const year& y) NOEXCEPT;
-
-CONSTCD11 year  operator+(const year&  x, const years& y) NOEXCEPT;
-CONSTCD11 year  operator+(const years& x, const year&  y) NOEXCEPT;
-CONSTCD11 year  operator-(const year&  x, const years& y) NOEXCEPT;
-CONSTCD11 years operator-(const year&  x, const year&  y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year& y);
-
-// weeknum
-
-class weeknum
-{
-    unsigned char wn_;
-
-public:
-    explicit CONSTCD11 weeknum(unsigned wn) NOEXCEPT;
-
-    weeknum& operator++()    NOEXCEPT;
-    weeknum  operator++(int) NOEXCEPT;
-    weeknum& operator--()    NOEXCEPT;
-    weeknum  operator--(int) NOEXCEPT;
-
-    weeknum& operator+=(const weeks& y) NOEXCEPT;
-    weeknum& operator-=(const weeks& y) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weeknum& x, const weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weeknum& x, const weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator< (const weeknum& x, const weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator> (const weeknum& x, const weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const weeknum& x, const weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const weeknum& x, const weeknum& y) NOEXCEPT;
-
-CONSTCD11 weeknum  operator+(const weeknum& x, const weeks&   y) NOEXCEPT;
-CONSTCD11 weeknum  operator+(const weeks&   x, const weeknum& y) NOEXCEPT;
-CONSTCD11 weeknum  operator-(const weeknum& x, const weeks&   y) NOEXCEPT;
-CONSTCD11 weeks    operator-(const weeknum& x, const weeknum& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weeknum& wn);
-
-// year_weeknum
-
-class year_weeknum
-{
-    iso_week::year    y_;
-    iso_week::weeknum wn_;
-
-public:
-    CONSTCD11 year_weeknum(const iso_week::year& y, const iso_week::weeknum& wn) NOEXCEPT;
-
-    CONSTCD11 iso_week::year    year()    const NOEXCEPT;
-    CONSTCD11 iso_week::weeknum weeknum() const NOEXCEPT;
-
-    year_weeknum& operator+=(const years& dy) NOEXCEPT;
-    year_weeknum& operator-=(const years& dy) NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_weeknum& x, const year_weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_weeknum& x, const year_weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_weeknum& x, const year_weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_weeknum& x, const year_weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_weeknum& x, const year_weeknum& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_weeknum& x, const year_weeknum& y) NOEXCEPT;
-
-CONSTCD11 year_weeknum operator+(const year_weeknum& ym, const years& dy) NOEXCEPT;
-CONSTCD11 year_weeknum operator+(const years& dy, const year_weeknum& ym) NOEXCEPT;
-CONSTCD11 year_weeknum operator-(const year_weeknum& ym, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_weeknum& ym);
-
-// year_lastweek
-
-class year_lastweek
-{
-    iso_week::year    y_;
-
-public:
-    CONSTCD11 explicit year_lastweek(const iso_week::year& y) NOEXCEPT;
-
-    CONSTCD11 iso_week::year    year()    const NOEXCEPT;
-    CONSTCD14 iso_week::weeknum weeknum() const NOEXCEPT;
-
-    year_lastweek& operator+=(const years& dy) NOEXCEPT;
-    year_lastweek& operator-=(const years& dy) NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_lastweek& x, const year_lastweek& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_lastweek& x, const year_lastweek& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_lastweek& x, const year_lastweek& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_lastweek& x, const year_lastweek& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_lastweek& x, const year_lastweek& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_lastweek& x, const year_lastweek& y) NOEXCEPT;
-
-CONSTCD11 year_lastweek operator+(const year_lastweek& ym, const years& dy) NOEXCEPT;
-CONSTCD11 year_lastweek operator+(const years& dy, const year_lastweek& ym) NOEXCEPT;
-CONSTCD11 year_lastweek operator-(const year_lastweek& ym, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_lastweek& ym);
-
-// weeknum_weekday
-
-class weeknum_weekday
-{
-    iso_week::weeknum wn_;
-    iso_week::weekday wd_;
-
-public:
-    CONSTCD11 weeknum_weekday(const iso_week::weeknum& wn,
-                              const iso_week::weekday& wd) NOEXCEPT;
-
-    CONSTCD11 iso_week::weeknum weeknum() const NOEXCEPT;
-    CONSTCD11 iso_week::weekday weekday() const NOEXCEPT;
-
-    CONSTCD14 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator< (const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator> (const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weeknum_weekday& md);
-
-// lastweek_weekday
-
-class lastweek_weekday
-{
-    iso_week::weekday wd_;
-
-public:
-    CONSTCD11 explicit lastweek_weekday(const iso_week::weekday& wd) NOEXCEPT;
-
-    CONSTCD11 iso_week::weekday weekday() const NOEXCEPT;
-
-    CONSTCD14 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator< (const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator> (const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const lastweek_weekday& md);
-
-// year_lastweek_weekday
-
-class year_lastweek_weekday
-{
-    iso_week::year    y_;
-    iso_week::weekday wd_;
-
-public:
-    CONSTCD11 year_lastweek_weekday(const iso_week::year& y,
-                                    const iso_week::weekday& wd) NOEXCEPT;
-
-    year_lastweek_weekday& operator+=(const years& y) NOEXCEPT;
-    year_lastweek_weekday& operator-=(const years& y) NOEXCEPT;
-
-    CONSTCD11 iso_week::year    year()    const NOEXCEPT;
-    CONSTCD14 iso_week::weeknum weeknum() const NOEXCEPT;
-    CONSTCD11 iso_week::weekday weekday() const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT;
-
-CONSTCD11 year_lastweek_weekday operator+(const year_lastweek_weekday& ywnwd, const years& y) NOEXCEPT;
-CONSTCD11 year_lastweek_weekday operator+(const years& y, const year_lastweek_weekday& ywnwd) NOEXCEPT;
-CONSTCD11 year_lastweek_weekday operator-(const year_lastweek_weekday& ywnwd, const years& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_lastweek_weekday& ywnwd);
-
-// class year_weeknum_weekday
-
-class year_weeknum_weekday
-{
-    iso_week::year    y_;
-    iso_week::weeknum wn_;
-    iso_week::weekday wd_;
-
-public:
-    CONSTCD11 year_weeknum_weekday(const iso_week::year& y, const iso_week::weeknum& wn,
-                                   const iso_week::weekday& wd) NOEXCEPT;
-    CONSTCD14 year_weeknum_weekday(const year_lastweek_weekday& ylwwd) NOEXCEPT;
-    CONSTCD14 year_weeknum_weekday(const sys_days& dp) NOEXCEPT;
-    CONSTCD14 explicit year_weeknum_weekday(const local_days& dp) NOEXCEPT;
-
-    year_weeknum_weekday& operator+=(const years& y) NOEXCEPT;
-    year_weeknum_weekday& operator-=(const years& y) NOEXCEPT;
-
-    CONSTCD11 iso_week::year    year()    const NOEXCEPT;
-    CONSTCD11 iso_week::weeknum weeknum() const NOEXCEPT;
-    CONSTCD11 iso_week::weekday weekday() const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD14 bool ok() const NOEXCEPT;
-
-private:
-    static CONSTCD14 year_weeknum_weekday from_days(days dp) NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT;
-
-CONSTCD11 year_weeknum_weekday operator+(const year_weeknum_weekday& ywnwd, const years& y) NOEXCEPT;
-CONSTCD11 year_weeknum_weekday operator+(const years& y, const year_weeknum_weekday& ywnwd) NOEXCEPT;
-CONSTCD11 year_weeknum_weekday operator-(const year_weeknum_weekday& ywnwd, const years& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_weeknum_weekday& ywnwd);
-
-//----------------+
-// Implementation |
-//----------------+
-
-// weekday
-
-CONSTCD11
-inline
-unsigned char
-weekday::to_iso_encoding(unsigned char z) NOEXCEPT
-{
-    return z != 0 ? z : (unsigned char)7;
-}
-
-CONSTCD11
-inline
-unsigned
-weekday::from_iso_encoding(unsigned z) NOEXCEPT
-{
-    return z != 7 ? z : 0u;
-}
-
-CONSTCD11
-inline
-unsigned char
-weekday::weekday_from_days(int z) NOEXCEPT
-{
-    return to_iso_encoding(static_cast<unsigned char>(static_cast<unsigned>(
-        z >= -4 ? (z+4) % 7 : (z+5) % 7 + 6)));
-}
-
-CONSTCD11
-inline
-weekday::weekday(unsigned wd) NOEXCEPT
-    : wd_(static_cast<decltype(wd_)>(wd))
-    {}
-
-CONSTCD11
-inline
-weekday::weekday(date::weekday wd) NOEXCEPT
-    : wd_(to_iso_encoding(static_cast<unsigned>(wd)))
-    {}
-
-CONSTCD11
-inline
-weekday::weekday(const sys_days& dp) NOEXCEPT
-    : wd_(weekday_from_days(dp.time_since_epoch().count()))
-    {}
-
-CONSTCD11
-inline
-weekday::weekday(const local_days& dp) NOEXCEPT
-    : wd_(weekday_from_days(dp.time_since_epoch().count()))
-    {}
-
-inline weekday& weekday::operator++() NOEXCEPT {if (++wd_ == 8) wd_ = 1; return *this;}
-inline weekday weekday::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-inline weekday& weekday::operator--() NOEXCEPT {if (wd_-- == 1) wd_ = 7; return *this;}
-inline weekday weekday::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-
-inline
-weekday&
-weekday::operator+=(const days& d) NOEXCEPT
-{
-    *this = *this + d;
-    return *this;
-}
-
-inline
-weekday&
-weekday::operator-=(const days& d) NOEXCEPT
-{
-    *this = *this - d;
-    return *this;
-}
-
-CONSTCD11
-inline
-weekday::operator unsigned() const NOEXCEPT
-{
-    return wd_;
-}
-
-CONSTCD11
-inline
-weekday::operator date::weekday() const NOEXCEPT
-{
-    return date::weekday{from_iso_encoding(unsigned{wd_})};
-}
-
-CONSTCD11 inline bool weekday::ok() const NOEXCEPT {return 1 <= wd_ && wd_ <= 7;}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday& x, const weekday& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday& x, const weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD14
-inline
-days
-operator-(const weekday& x, const weekday& y) NOEXCEPT
-{
-    auto const diff = static_cast<unsigned>(x) - static_cast<unsigned>(y);
-    return days{diff <= 6 ? diff : diff + 7};
-}
-
-CONSTCD14
-inline
-weekday
-operator+(const weekday& x, const days& y) NOEXCEPT
-{
-    auto const wdu = static_cast<long long>(static_cast<unsigned>(x) - 1u) + y.count();
-    auto const wk = (wdu >= 0 ? wdu : wdu-6) / 7;
-    return weekday{static_cast<unsigned>(wdu - wk * 7) + 1u};
-}
-
-CONSTCD14
-inline
-weekday
-operator+(const days& x, const weekday& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD14
-inline
-weekday
-operator-(const weekday& x, const days& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday& wd)
-{
-    switch (static_cast<unsigned>(wd))
-    {
-    case 7:
-        os << "Sun";
-        break;
-    case 1:
-        os << "Mon";
-        break;
-    case 2:
-        os << "Tue";
-        break;
-    case 3:
-        os << "Wed";
-        break;
-    case 4:
-        os << "Thu";
-        break;
-    case 5:
-        os << "Fri";
-        break;
-    case 6:
-        os << "Sat";
-        break;
-    default:
-        os << static_cast<unsigned>(wd) << " is not a valid weekday";
-        break;
-    }
-    return os;
-}
-
-// year
-
-CONSTCD11 inline year::year(int y) NOEXCEPT : y_(static_cast<decltype(y_)>(y)) {}
-inline year& year::operator++() NOEXCEPT {++y_; return *this;}
-inline year year::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-inline year& year::operator--() NOEXCEPT {--y_; return *this;}
-inline year year::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-inline year& year::operator+=(const years& y) NOEXCEPT {*this = *this + y; return *this;}
-inline year& year::operator-=(const years& y) NOEXCEPT {*this = *this - y; return *this;}
-
-CONSTCD11 inline year::operator int() const NOEXCEPT {return y_;}
-CONSTCD11 inline bool year::ok() const NOEXCEPT {return min() <= *this && *this <= max();}
-
-CONSTCD11
-inline
-year
-year::min() NOEXCEPT
-{
-    using namespace std::chrono;
-    static_assert(sizeof(seconds)*CHAR_BIT >= 41, "seconds may overflow");
-    static_assert(sizeof(hours)*CHAR_BIT >= 30, "hours may overflow");
-    return sizeof(minutes)*CHAR_BIT < 34 ?
-        year{1970} + duration_cast<years>(minutes::min()) :
-        year{std::numeric_limits<short>::min()};
-}
-
-CONSTCD11
-inline
-year
-year::max() NOEXCEPT
-{
-    using namespace std::chrono;
-    static_assert(sizeof(seconds)*CHAR_BIT >= 41, "seconds may overflow");
-    static_assert(sizeof(hours)*CHAR_BIT >= 30, "hours may overflow");
-    return sizeof(minutes)*CHAR_BIT < 34 ?
-        year{1969} + duration_cast<years>(minutes::max()) :
-        year{std::numeric_limits<short>::max()};
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year& x, const year& y) NOEXCEPT
-{
-    return static_cast<int>(x) == static_cast<int>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year& x, const year& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year& x, const year& y) NOEXCEPT
-{
-    return static_cast<int>(x) < static_cast<int>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year& x, const year& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year& x, const year& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year& x, const year& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-years
-operator-(const year& x, const year& y) NOEXCEPT
-{
-    return years{static_cast<int>(x) - static_cast<int>(y)};
-}
-
-CONSTCD11
-inline
-year
-operator+(const year& x, const years& y) NOEXCEPT
-{
-    return year{static_cast<int>(x) + y.count()};
-}
-
-CONSTCD11
-inline
-year
-operator+(const years& x, const year& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD11
-inline
-year
-operator-(const year& x, const years& y) NOEXCEPT
-{
-    return year{static_cast<int>(x) - y.count()};
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year& y)
-{
-    date::detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::internal);
-    os.width(4 + (y < year{0}));
-    os << static_cast<int>(y);
-    return os;
-}
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-inline namespace literals
-{
-
-CONSTCD11
-inline
-iso_week::year
-operator "" _y(unsigned long long y) NOEXCEPT
-{
-    return iso_week::year(static_cast<int>(y));
-}
-
-CONSTCD11
-inline
-iso_week::weeknum
-operator "" _w(unsigned long long wn) NOEXCEPT
-{
-    return iso_week::weeknum(static_cast<unsigned>(wn));
-}
-
-#endif  // !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-CONSTDATA iso_week::last_week last{};
-
-CONSTDATA iso_week::weekday sun{7u};
-CONSTDATA iso_week::weekday mon{1u};
-CONSTDATA iso_week::weekday tue{2u};
-CONSTDATA iso_week::weekday wed{3u};
-CONSTDATA iso_week::weekday thu{4u};
-CONSTDATA iso_week::weekday fri{5u};
-CONSTDATA iso_week::weekday sat{6u};
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-}  // inline namespace literals
-#endif
-
-// weeknum
-
-CONSTCD11
-inline
-weeknum::weeknum(unsigned wn) NOEXCEPT
-    : wn_(static_cast<decltype(wn_)>(wn))
-    {}
-
-inline weeknum& weeknum::operator++() NOEXCEPT {++wn_; return *this;}
-inline weeknum weeknum::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-inline weeknum& weeknum::operator--() NOEXCEPT {--wn_; return *this;}
-inline weeknum weeknum::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-
-inline
-weeknum&
-weeknum::operator+=(const weeks& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-inline
-weeknum&
-weeknum::operator-=(const weeks& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline weeknum::operator unsigned() const NOEXCEPT {return wn_;}
-CONSTCD11 inline bool weeknum::ok() const NOEXCEPT {return 1 <= wn_ && wn_ <= 53;}
-
-CONSTCD11
-inline
-bool
-operator==(const weeknum& x, const weeknum& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weeknum& x, const weeknum& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const weeknum& x, const weeknum& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) < static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const weeknum& x, const weeknum& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const weeknum& x, const weeknum& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const weeknum& x, const weeknum& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-weeks
-operator-(const weeknum& x, const weeknum& y) NOEXCEPT
-{
-    return weeks{static_cast<weeks::rep>(static_cast<unsigned>(x)) -
-                 static_cast<weeks::rep>(static_cast<unsigned>(y))};
-}
-
-CONSTCD11
-inline
-weeknum
-operator+(const weeknum& x, const weeks& y) NOEXCEPT
-{
-    return weeknum{static_cast<unsigned>(x) + static_cast<unsigned>(y.count())};
-}
-
-CONSTCD11
-inline
-weeknum
-operator+(const weeks& x, const weeknum& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD11
-inline
-weeknum
-operator-(const weeknum& x, const weeks& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weeknum& wn)
-{
-    date::detail::save_stream<CharT, Traits> _(os);
-    os << 'W';
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::right);
-    os.width(2);
-    os << static_cast<unsigned>(wn);
-    return os;
-}
-
-// year_weeknum
-
-CONSTCD11
-inline
-year_weeknum::year_weeknum(const iso_week::year& y, const iso_week::weeknum& wn) NOEXCEPT
-    : y_(y)
-    , wn_(wn)
-    {}
-
-CONSTCD11 inline year year_weeknum::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline weeknum year_weeknum::weeknum() const NOEXCEPT {return wn_;}
-CONSTCD11 inline bool year_weeknum::ok() const NOEXCEPT
-{
-    return y_.ok() && 1u <= static_cast<unsigned>(wn_) && wn_ <= (y_/last).weeknum();
-}
-
-inline
-year_weeknum&
-year_weeknum::operator+=(const years& dy) NOEXCEPT
-{
-    *this = *this + dy;
-    return *this;
-}
-
-inline
-year_weeknum&
-year_weeknum::operator-=(const years& dy) NOEXCEPT
-{
-    *this = *this - dy;
-    return *this;
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_weeknum& x, const year_weeknum& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.weeknum() == y.weeknum();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_weeknum& x, const year_weeknum& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_weeknum& x, const year_weeknum& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.weeknum() < y.weeknum()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_weeknum& x, const year_weeknum& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_weeknum& x, const year_weeknum& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_weeknum& x, const year_weeknum& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-year_weeknum
-operator+(const year_weeknum& ym, const years& dy) NOEXCEPT
-{
-    return (ym.year() + dy) / ym.weeknum();
-}
-
-CONSTCD11
-inline
-year_weeknum
-operator+(const years& dy, const year_weeknum& ym) NOEXCEPT
-{
-    return ym + dy;
-}
-
-CONSTCD11
-inline
-year_weeknum
-operator-(const year_weeknum& ym, const years& dy) NOEXCEPT
-{
-    return ym + -dy;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_weeknum& ywn)
-{
-    return os << ywn.year() << '-' << ywn.weeknum();
-}
-
-
-// year_lastweek
-
-CONSTCD11
-inline
-year_lastweek::year_lastweek(const iso_week::year& y) NOEXCEPT
-    : y_(y)
-    {}
-
-CONSTCD11 inline year year_lastweek::year() const NOEXCEPT {return y_;}
-
-CONSTCD14
-inline
-weeknum
-year_lastweek::weeknum() const NOEXCEPT
-{
-    const auto y = date::year{static_cast<int>(y_)};
-    const auto s0 = sys_days((y-years{1})/12/date::thu[date::last]);
-    const auto s1 = sys_days(y/12/date::thu[date::last]);
-    return iso_week::weeknum(static_cast<unsigned>(date::trunc<weeks>(s1-s0).count()));
-}
-
-CONSTCD11 inline bool year_lastweek::ok() const NOEXCEPT {return y_.ok();}
-
-inline
-year_lastweek&
-year_lastweek::operator+=(const years& dy) NOEXCEPT
-{
-    *this = *this + dy;
-    return *this;
-}
-
-inline
-year_lastweek&
-year_lastweek::operator-=(const years& dy) NOEXCEPT
-{
-    *this = *this - dy;
-    return *this;
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_lastweek& x, const year_lastweek& y) NOEXCEPT
-{
-    return x.year() == y.year();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_lastweek& x, const year_lastweek& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_lastweek& x, const year_lastweek& y) NOEXCEPT
-{
-    return x.year() < y.year();
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_lastweek& x, const year_lastweek& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_lastweek& x, const year_lastweek& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_lastweek& x, const year_lastweek& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-year_lastweek
-operator+(const year_lastweek& ym, const years& dy) NOEXCEPT
-{
-    return year_lastweek{ym.year() + dy};
-}
-
-CONSTCD11
-inline
-year_lastweek
-operator+(const years& dy, const year_lastweek& ym) NOEXCEPT
-{
-    return ym + dy;
-}
-
-CONSTCD11
-inline
-year_lastweek
-operator-(const year_lastweek& ym, const years& dy) NOEXCEPT
-{
-    return ym + -dy;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_lastweek& ywn)
-{
-    return os << ywn.year() << "-W last";
-}
-
-// weeknum_weekday
-
-CONSTCD11
-inline
-weeknum_weekday::weeknum_weekday(const iso_week::weeknum& wn,
-                                 const iso_week::weekday& wd) NOEXCEPT
-    : wn_(wn)
-    , wd_(wd)
-    {}
-
-CONSTCD11 inline weeknum weeknum_weekday::weeknum() const NOEXCEPT {return wn_;}
-CONSTCD11 inline weekday weeknum_weekday::weekday() const NOEXCEPT {return wd_;}
-
-CONSTCD14
-inline
-bool
-weeknum_weekday::ok() const NOEXCEPT
-{
-    return wn_.ok() && wd_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT
-{
-    return x.weeknum() == y.weeknum() && x.weekday() == y.weekday();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT
-{
-    return x.weeknum() < y.weeknum() ? true
-        : (x.weeknum() > y.weeknum() ? false
-        : (static_cast<unsigned>(x.weekday()) < static_cast<unsigned>(y.weekday())));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const weeknum_weekday& x, const weeknum_weekday& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weeknum_weekday& md)
-{
-    return os << md.weeknum() << '-' << md.weekday();
-}
-
-// lastweek_weekday
-
-CONSTCD11
-inline
-lastweek_weekday::lastweek_weekday(const iso_week::weekday& wd) NOEXCEPT
-    : wd_(wd)
-    {}
-
-CONSTCD11 inline weekday lastweek_weekday::weekday() const NOEXCEPT {return wd_;}
-
-CONSTCD14
-inline
-bool
-lastweek_weekday::ok() const NOEXCEPT
-{
-    return wd_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT
-{
-    return x.weekday() == y.weekday();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x.weekday()) < static_cast<unsigned>(y.weekday());
-}
-
-CONSTCD11
-inline
-bool
-operator>(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const lastweek_weekday& x, const lastweek_weekday& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const lastweek_weekday& md)
-{
-    return os << "W last-" << md.weekday();
-}
-
-// year_lastweek_weekday
-
-CONSTCD11
-inline
-year_lastweek_weekday::year_lastweek_weekday(const iso_week::year& y,
-                                             const iso_week::weekday& wd) NOEXCEPT
-    : y_(y)
-    , wd_(wd)
-    {}
-
-inline
-year_lastweek_weekday&
-year_lastweek_weekday::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-inline
-year_lastweek_weekday&
-year_lastweek_weekday::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_lastweek_weekday::year() const NOEXCEPT {return y_;}
-
-CONSTCD14
-inline
-weeknum
-year_lastweek_weekday::weeknum() const NOEXCEPT
-{
-    return (y_ / last).weeknum();
-}
-
-CONSTCD11 inline weekday year_lastweek_weekday::weekday() const NOEXCEPT {return wd_;}
-
-CONSTCD14
-inline
-year_lastweek_weekday::operator sys_days() const NOEXCEPT
-{
-    return sys_days(date::year{static_cast<int>(y_)}/date::dec/date::thu[date::last])
-         + (sun - thu) - (sun - wd_);
-}
-
-CONSTCD14
-inline
-year_lastweek_weekday::operator local_days() const NOEXCEPT
-{
-    return local_days(date::year{static_cast<int>(y_)}/date::dec/date::thu[date::last])
-         + (sun - thu) - (sun - wd_);
-}
-
-CONSTCD11
-inline
-bool
-year_lastweek_weekday::ok() const NOEXCEPT
-{
-    return y_.ok() && wd_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.weekday() == y.weekday();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (static_cast<unsigned>(x.weekday()) < static_cast<unsigned>(y.weekday())));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_lastweek_weekday& x, const year_lastweek_weekday& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-year_lastweek_weekday
-operator+(const year_lastweek_weekday& ywnwd, const years& y)  NOEXCEPT
-{
-    return (ywnwd.year() + y) / last / ywnwd.weekday();
-}
-
-CONSTCD11
-inline
-year_lastweek_weekday
-operator+(const years& y, const year_lastweek_weekday& ywnwd)  NOEXCEPT
-{
-    return ywnwd + y;
-}
-
-CONSTCD11
-inline
-year_lastweek_weekday
-operator-(const year_lastweek_weekday& ywnwd, const years& y)  NOEXCEPT
-{
-    return ywnwd + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_lastweek_weekday& ywnwd)
-{
-    return os << ywnwd.year() << "-W last-" << ywnwd.weekday();
-}
-
-// year_weeknum_weekday
-
-CONSTCD11
-inline
-year_weeknum_weekday::year_weeknum_weekday(const iso_week::year& y,
-                                           const iso_week::weeknum& wn,
-                                           const iso_week::weekday& wd) NOEXCEPT
-    : y_(y)
-    , wn_(wn)
-    , wd_(wd)
-    {}
-
-CONSTCD14
-inline
-year_weeknum_weekday::year_weeknum_weekday(const year_lastweek_weekday& ylwwd) NOEXCEPT
-    : y_(ylwwd.year())
-    , wn_(ylwwd.weeknum())
-    , wd_(ylwwd.weekday())
-    {}
-
-CONSTCD14
-inline
-year_weeknum_weekday::year_weeknum_weekday(const sys_days& dp) NOEXCEPT
-    : year_weeknum_weekday(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_weeknum_weekday::year_weeknum_weekday(const local_days& dp) NOEXCEPT
-    : year_weeknum_weekday(from_days(dp.time_since_epoch()))
-    {}
-
-inline
-year_weeknum_weekday&
-year_weeknum_weekday::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-inline
-year_weeknum_weekday&
-year_weeknum_weekday::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_weeknum_weekday::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline weeknum year_weeknum_weekday::weeknum() const NOEXCEPT {return wn_;}
-CONSTCD11 inline weekday year_weeknum_weekday::weekday() const NOEXCEPT {return wd_;}
-
-CONSTCD14
-inline
-year_weeknum_weekday::operator sys_days() const NOEXCEPT
-{
-    return sys_days(date::year{static_cast<int>(y_)-1}/date::dec/date::thu[date::last])
-         + (date::mon - date::thu) + weeks{static_cast<unsigned>(wn_)-1} + (wd_ - mon);
-}
-
-CONSTCD14
-inline
-year_weeknum_weekday::operator local_days() const NOEXCEPT
-{
-    return local_days(date::year{static_cast<int>(y_)-1}/date::dec/date::thu[date::last])
-         + (date::mon - date::thu) + weeks{static_cast<unsigned>(wn_)-1} + (wd_ - mon);
-}
-
-CONSTCD14
-inline
-bool
-year_weeknum_weekday::ok() const NOEXCEPT
-{
-    return y_.ok() && wd_.ok() && iso_week::weeknum{1u} <= wn_ && wn_ <= year_lastweek{y_}.weeknum();
-}
-
-CONSTCD14
-inline
-year_weeknum_weekday
-year_weeknum_weekday::from_days(days d) NOEXCEPT
-{
-    const auto dp = sys_days{d};
-    const auto wd = iso_week::weekday{dp};
-    auto y = date::year_month_day{dp + days{3}}.year();
-    auto start = sys_days((y - date::years{1})/date::dec/date::thu[date::last]) + (mon-thu);
-    if (dp < start)
-    {
-        --y;
-        start = sys_days((y - date::years{1})/date::dec/date::thu[date::last]) + (mon-thu);
-    }
-    const auto wn = iso_week::weeknum(
-                       static_cast<unsigned>(date::trunc<weeks>(dp - start).count() + 1));
-    return {iso_week::year(static_cast<int>(y)), wn, wd};
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.weeknum() == y.weeknum() && x.weekday() == y.weekday();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.weeknum() < y.weeknum() ? true
-        : (x.weeknum() > y.weeknum() ? false
-        : (static_cast<unsigned>(x.weekday()) < static_cast<unsigned>(y.weekday())))));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_weeknum_weekday& x, const year_weeknum_weekday& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-year_weeknum_weekday
-operator+(const year_weeknum_weekday& ywnwd, const years& y)  NOEXCEPT
-{
-    return (ywnwd.year() + y) / ywnwd.weeknum() / ywnwd.weekday();
-}
-
-CONSTCD11
-inline
-year_weeknum_weekday
-operator+(const years& y, const year_weeknum_weekday& ywnwd)  NOEXCEPT
-{
-    return ywnwd + y;
-}
-
-CONSTCD11
-inline
-year_weeknum_weekday
-operator-(const year_weeknum_weekday& ywnwd, const years& y)  NOEXCEPT
-{
-    return ywnwd + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_weeknum_weekday& ywnwd)
-{
-    return os << ywnwd.year() << '-' << ywnwd.weeknum() << '-' << ywnwd.weekday();
-}
-
-// date composition operators
-
-CONSTCD11
-inline
-year_weeknum
-operator/(const year& y, const weeknum& wn) NOEXCEPT
-{
-    return {y, wn};
-}
-
-CONSTCD11
-inline
-year_weeknum
-operator/(const year& y, int wn) NOEXCEPT
-{
-    return y/weeknum(static_cast<unsigned>(wn));
-}
-
-CONSTCD11
-inline
-year_lastweek
-operator/(const year& y, last_week) NOEXCEPT
-{
-    return year_lastweek{y};
-}
-
-CONSTCD11
-inline
-weeknum_weekday
-operator/(const weeknum& wn, const weekday& wd) NOEXCEPT
-{
-    return {wn, wd};
-}
-
-CONSTCD11
-inline
-weeknum_weekday
-operator/(const weeknum& wn, int wd) NOEXCEPT
-{
-    return wn/weekday{static_cast<unsigned>(wd)};
-}
-
-CONSTCD11
-inline
-weeknum_weekday
-operator/(const weekday& wd, const weeknum& wn) NOEXCEPT
-{
-    return wn/wd;
-}
-
-CONSTCD11
-inline
-weeknum_weekday
-operator/(const weekday& wd, int wn) NOEXCEPT
-{
-    return weeknum{static_cast<unsigned>(wn)}/wd;
-}
-
-CONSTCD11
-inline
-lastweek_weekday
-operator/(const last_week&, const weekday& wd) NOEXCEPT
-{
-    return lastweek_weekday{wd};
-}
-
-CONSTCD11
-inline
-lastweek_weekday
-operator/(const last_week& wn, int wd) NOEXCEPT
-{
-    return wn / weekday{static_cast<unsigned>(wd)};
-}
-
-CONSTCD11
-inline
-lastweek_weekday
-operator/(const weekday& wd, const last_week& wn) NOEXCEPT
-{
-    return wn / wd;
-}
-
-CONSTCD11
-inline
-year_weeknum_weekday
-operator/(const year_weeknum& ywn, const weekday& wd) NOEXCEPT
-{
-    return {ywn.year(), ywn.weeknum(), wd};
-}
-
-CONSTCD11
-inline
-year_weeknum_weekday
-operator/(const year_weeknum& ywn, int wd) NOEXCEPT
-{
-    return ywn / weekday(static_cast<unsigned>(wd));
-}
-
-CONSTCD11
-inline
-year_weeknum_weekday
-operator/(const weeknum_weekday& wnwd, const year& y) NOEXCEPT
-{
-    return {y, wnwd.weeknum(), wnwd.weekday()};
-}
-
-CONSTCD11
-inline
-year_weeknum_weekday
-operator/(const weeknum_weekday& wnwd, int y) NOEXCEPT
-{
-    return wnwd / year{y};
-}
-
-CONSTCD11
-inline
-year_lastweek_weekday
-operator/(const year_lastweek& ylw, const weekday& wd) NOEXCEPT
-{
-    return {ylw.year(), wd};
-}
-
-CONSTCD11
-inline
-year_lastweek_weekday
-operator/(const year_lastweek& ylw, int wd) NOEXCEPT
-{
-    return ylw / weekday(static_cast<unsigned>(wd));
-}
-
-CONSTCD11
-inline
-year_lastweek_weekday
-operator/(const lastweek_weekday& lwwd, const year& y) NOEXCEPT
-{
-    return {y, lwwd.weekday()};
-}
-
-CONSTCD11
-inline
-year_lastweek_weekday
-operator/(const lastweek_weekday& lwwd, int y) NOEXCEPT
-{
-    return lwwd / year{y};
-}
-
-}  // namespace iso_week
-
-#endif  // ISO_WEEK_H
diff --git a/thirdparty/date/include/date/julian.h b/thirdparty/date/include/date/julian.h
deleted file mode 100644
index 4aac963..0000000
--- a/thirdparty/date/include/date/julian.h
+++ /dev/null
@@ -1,3046 +0,0 @@
-#ifndef JULIAN_H
-#define JULIAN_H
-
-// The MIT License (MIT)
-//
-// Copyright (c) 2016 Howard Hinnant
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-// Our apologies.  When the previous paragraph was written, lowercase had not yet
-// been invented (that would involve another several millennia of evolution).
-// We did not mean to shout.
-
-#include "date.h"
-
-namespace julian
-{
-
-// durations
-
-using days = date::days;
-
-using weeks = date::weeks;
-
-using years = std::chrono::duration
-    <int, std::ratio_multiply<std::ratio<1461, 4>, days::period>>;
-
-using months = std::chrono::duration
-    <int, std::ratio_divide<years::period, std::ratio<12>>>;
-
-// time_point
-
-using sys_days   = date::sys_days;
-using local_days = date::local_days;
-
-// types
-
-struct last_spec
-{
-    explicit last_spec() = default;
-};
-
-class day;
-class month;
-class year;
-
-class weekday;
-class weekday_indexed;
-class weekday_last;
-
-class month_day;
-class month_day_last;
-class month_weekday;
-class month_weekday_last;
-
-class year_month;
-
-class year_month_day;
-class year_month_day_last;
-class year_month_weekday;
-class year_month_weekday_last;
-
-// date composition operators
-
-CONSTCD11 year_month operator/(const year& y, const month& m) NOEXCEPT;
-CONSTCD11 year_month operator/(const year& y, int          m) NOEXCEPT;
-
-CONSTCD11 month_day operator/(const day& d, const month& m) NOEXCEPT;
-CONSTCD11 month_day operator/(const day& d, int          m) NOEXCEPT;
-CONSTCD11 month_day operator/(const month& m, const day& d) NOEXCEPT;
-CONSTCD11 month_day operator/(const month& m, int        d) NOEXCEPT;
-CONSTCD11 month_day operator/(int          m, const day& d) NOEXCEPT;
-
-CONSTCD11 month_day_last operator/(const month& m, last_spec) NOEXCEPT;
-CONSTCD11 month_day_last operator/(int          m, last_spec) NOEXCEPT;
-CONSTCD11 month_day_last operator/(last_spec, const month& m) NOEXCEPT;
-CONSTCD11 month_day_last operator/(last_spec, int          m) NOEXCEPT;
-
-CONSTCD11 month_weekday operator/(const month& m, const weekday_indexed& wdi) NOEXCEPT;
-CONSTCD11 month_weekday operator/(int          m, const weekday_indexed& wdi) NOEXCEPT;
-CONSTCD11 month_weekday operator/(const weekday_indexed& wdi, const month& m) NOEXCEPT;
-CONSTCD11 month_weekday operator/(const weekday_indexed& wdi, int          m) NOEXCEPT;
-
-CONSTCD11 month_weekday_last operator/(const month& m, const weekday_last& wdl) NOEXCEPT;
-CONSTCD11 month_weekday_last operator/(int          m, const weekday_last& wdl) NOEXCEPT;
-CONSTCD11 month_weekday_last operator/(const weekday_last& wdl, const month& m) NOEXCEPT;
-CONSTCD11 month_weekday_last operator/(const weekday_last& wdl, int          m) NOEXCEPT;
-
-CONSTCD11 year_month_day operator/(const year_month& ym, const day& d) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const year_month& ym, int        d) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const year& y, const month_day& md) NOEXCEPT;
-CONSTCD11 year_month_day operator/(int         y, const month_day& md) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const month_day& md, const year& y) NOEXCEPT;
-CONSTCD11 year_month_day operator/(const month_day& md, int         y) NOEXCEPT;
-
-CONSTCD11
-    year_month_day_last operator/(const year_month& ym,   last_spec) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(const year& y, const month_day_last& mdl) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(int         y, const month_day_last& mdl) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(const month_day_last& mdl, const year& y) NOEXCEPT;
-CONSTCD11
-    year_month_day_last operator/(const month_day_last& mdl, int         y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const year_month& ym, const weekday_indexed& wdi) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const year&        y, const month_weekday&   mwd) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(int                y, const month_weekday&   mwd) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const month_weekday& mwd, const year&          y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator/(const month_weekday& mwd, int                  y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const year_month& ym, const weekday_last& wdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const year& y, const month_weekday_last& mwdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(int         y, const month_weekday_last& mwdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, const year& y) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, int         y) NOEXCEPT;
-
-// Detailed interface
-
-// day
-
-class day
-{
-    unsigned char d_;
-
-public:
-    explicit CONSTCD11 day(unsigned d) NOEXCEPT;
-
-    CONSTCD14 day& operator++()    NOEXCEPT;
-    CONSTCD14 day  operator++(int) NOEXCEPT;
-    CONSTCD14 day& operator--()    NOEXCEPT;
-    CONSTCD14 day  operator--(int) NOEXCEPT;
-
-    CONSTCD14 day& operator+=(const days& d) NOEXCEPT;
-    CONSTCD14 day& operator-=(const days& d) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator< (const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator> (const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const day& x, const day& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const day& x, const day& y) NOEXCEPT;
-
-CONSTCD11 day  operator+(const day&  x, const days& y) NOEXCEPT;
-CONSTCD11 day  operator+(const days& x, const day&  y) NOEXCEPT;
-CONSTCD11 day  operator-(const day&  x, const days& y) NOEXCEPT;
-CONSTCD11 days operator-(const day&  x, const day&  y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const day& d);
-
-// month
-
-class month
-{
-    unsigned char m_;
-
-public:
-    explicit CONSTCD11 month(unsigned m) NOEXCEPT;
-
-    CONSTCD14 month& operator++()    NOEXCEPT;
-    CONSTCD14 month  operator++(int) NOEXCEPT;
-    CONSTCD14 month& operator--()    NOEXCEPT;
-    CONSTCD14 month  operator--(int) NOEXCEPT;
-
-    CONSTCD14 month& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 month& operator-=(const months& m) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator< (const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator> (const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const month& x, const month& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const month& x, const month& y) NOEXCEPT;
-
-CONSTCD14 month  operator+(const month&  x, const months& y) NOEXCEPT;
-CONSTCD14 month  operator+(const months& x,  const month& y) NOEXCEPT;
-CONSTCD14 month  operator-(const month&  x, const months& y) NOEXCEPT;
-CONSTCD14 months operator-(const month&  x,  const month& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month& m);
-
-// year
-
-class year
-{
-    short y_;
-
-public:
-    explicit CONSTCD11 year(int y) NOEXCEPT;
-
-    CONSTCD14 year& operator++()    NOEXCEPT;
-    CONSTCD14 year  operator++(int) NOEXCEPT;
-    CONSTCD14 year& operator--()    NOEXCEPT;
-    CONSTCD14 year  operator--(int) NOEXCEPT;
-
-    CONSTCD14 year& operator+=(const years& y) NOEXCEPT;
-    CONSTCD14 year& operator-=(const years& y) NOEXCEPT;
-
-    CONSTCD11 bool is_leap() const NOEXCEPT;
-
-    CONSTCD11 explicit operator int() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-    static CONSTCD11 year min() NOEXCEPT;
-    static CONSTCD11 year max() NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year& x, const year& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year& x, const year& y) NOEXCEPT;
-
-CONSTCD11 year  operator+(const year&  x, const years& y) NOEXCEPT;
-CONSTCD11 year  operator+(const years& x, const year&  y) NOEXCEPT;
-CONSTCD11 year  operator-(const year&  x, const years& y) NOEXCEPT;
-CONSTCD11 years operator-(const year&  x, const year&  y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year& y);
-
-// weekday
-
-class weekday
-{
-    unsigned char wd_;
-public:
-    explicit CONSTCD11 weekday(unsigned wd) NOEXCEPT;
-    explicit weekday(int) = delete;
-    CONSTCD11 weekday(const sys_days& dp) NOEXCEPT;
-    CONSTCD11 explicit weekday(const local_days& dp) NOEXCEPT;
-
-    CONSTCD14 weekday& operator++()    NOEXCEPT;
-    CONSTCD14 weekday  operator++(int) NOEXCEPT;
-    CONSTCD14 weekday& operator--()    NOEXCEPT;
-    CONSTCD14 weekday  operator--(int) NOEXCEPT;
-
-    CONSTCD14 weekday& operator+=(const days& d) NOEXCEPT;
-    CONSTCD14 weekday& operator-=(const days& d) NOEXCEPT;
-
-    CONSTCD11 explicit operator unsigned() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-    CONSTCD11 weekday_indexed operator[](unsigned index) const NOEXCEPT;
-    CONSTCD11 weekday_last    operator[](last_spec)      const NOEXCEPT;
-
-private:
-    static CONSTCD11 unsigned char weekday_from_days(int z) NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday& x, const weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday& x, const weekday& y) NOEXCEPT;
-
-CONSTCD14 weekday operator+(const weekday& x, const days&    y) NOEXCEPT;
-CONSTCD14 weekday operator+(const days&    x, const weekday& y) NOEXCEPT;
-CONSTCD14 weekday operator-(const weekday& x, const days&    y) NOEXCEPT;
-CONSTCD14 days    operator-(const weekday& x, const weekday& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday& wd);
-
-// weekday_indexed
-
-class weekday_indexed
-{
-    unsigned char wd_    : 4;
-    unsigned char index_ : 4;
-
-public:
-    CONSTCD11 weekday_indexed(const julian::weekday& wd, unsigned index) NOEXCEPT;
-
-    CONSTCD11 julian::weekday weekday() const NOEXCEPT;
-    CONSTCD11 unsigned index() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_indexed& wdi);
-
-// weekday_last
-
-class weekday_last
-{
-    julian::weekday wd_;
-
-public:
-    explicit CONSTCD11 weekday_last(const julian::weekday& wd) NOEXCEPT;
-
-    CONSTCD11 julian::weekday weekday() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const weekday_last& x, const weekday_last& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const weekday_last& x, const weekday_last& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_last& wdl);
-
-// year_month
-
-class year_month
-{
-    julian::year  y_;
-    julian::month m_;
-
-public:
-    CONSTCD11 year_month(const julian::year& y, const julian::month& m) NOEXCEPT;
-
-    CONSTCD11 julian::year  year()  const NOEXCEPT;
-    CONSTCD11 julian::month month() const NOEXCEPT;
-
-    CONSTCD14 year_month& operator+=(const months& dm) NOEXCEPT;
-    CONSTCD14 year_month& operator-=(const months& dm) NOEXCEPT;
-    CONSTCD14 year_month& operator+=(const years& dy) NOEXCEPT;
-    CONSTCD14 year_month& operator-=(const years& dy) NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_month& x, const year_month& y) NOEXCEPT;
-
-CONSTCD14 year_month operator+(const year_month& ym, const months& dm) NOEXCEPT;
-CONSTCD14 year_month operator+(const months& dm, const year_month& ym) NOEXCEPT;
-CONSTCD14 year_month operator-(const year_month& ym, const months& dm) NOEXCEPT;
-
-CONSTCD11 months operator-(const year_month& x, const year_month& y) NOEXCEPT;
-CONSTCD11 year_month operator+(const year_month& ym, const years& dy) NOEXCEPT;
-CONSTCD11 year_month operator+(const years& dy, const year_month& ym) NOEXCEPT;
-CONSTCD11 year_month operator-(const year_month& ym, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month& ym);
-
-// month_day
-
-class month_day
-{
-    julian::month m_;
-    julian::day   d_;
-
-public:
-    CONSTCD11 month_day(const julian::month& m, const julian::day& d) NOEXCEPT;
-
-    CONSTCD11 julian::month month() const NOEXCEPT;
-    CONSTCD11 julian::day   day() const NOEXCEPT;
-
-    CONSTCD14 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator< (const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator> (const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const month_day& x, const month_day& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const month_day& x, const month_day& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day& md);
-
-// month_day_last
-
-class month_day_last
-{
-    julian::month m_;
-
-public:
-    CONSTCD11 explicit month_day_last(const julian::month& m) NOEXCEPT;
-
-    CONSTCD11 julian::month month() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator< (const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator> (const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const month_day_last& x, const month_day_last& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day_last& mdl);
-
-// month_weekday
-
-class month_weekday
-{
-    julian::month           m_;
-    julian::weekday_indexed wdi_;
-public:
-    CONSTCD11 month_weekday(const julian::month& m,
-                            const julian::weekday_indexed& wdi) NOEXCEPT;
-
-    CONSTCD11 julian::month           month()           const NOEXCEPT;
-    CONSTCD11 julian::weekday_indexed weekday_indexed() const NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const month_weekday& x, const month_weekday& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const month_weekday& x, const month_weekday& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday& mwd);
-
-// month_weekday_last
-
-class month_weekday_last
-{
-    julian::month        m_;
-    julian::weekday_last wdl_;
-
-public:
-    CONSTCD11 month_weekday_last(const julian::month& m,
-                                 const julian::weekday_last& wd) NOEXCEPT;
-
-    CONSTCD11 julian::month        month()        const NOEXCEPT;
-    CONSTCD11 julian::weekday_last weekday_last() const NOEXCEPT;
-
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11
-    bool operator==(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator!=(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday_last& mwdl);
-
-// class year_month_day
-
-class year_month_day
-{
-    julian::year  y_;
-    julian::month m_;
-    julian::day   d_;
-
-public:
-    CONSTCD11 year_month_day(const julian::year& y, const julian::month& m,
-                             const julian::day& d) NOEXCEPT;
-    CONSTCD14 year_month_day(const year_month_day_last& ymdl) NOEXCEPT;
-
-    CONSTCD14 year_month_day(sys_days dp) NOEXCEPT;
-    CONSTCD14 explicit year_month_day(local_days dp) NOEXCEPT;
-
-    CONSTCD14 year_month_day& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day& operator+=(const years& y)  NOEXCEPT;
-    CONSTCD14 year_month_day& operator-=(const years& y)  NOEXCEPT;
-
-    CONSTCD11 julian::year  year()  const NOEXCEPT;
-    CONSTCD11 julian::month month() const NOEXCEPT;
-    CONSTCD11 julian::day   day()   const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD14 bool ok() const NOEXCEPT;
-
-private:
-    static CONSTCD14 year_month_day from_days(days dp) NOEXCEPT;
-    CONSTCD14 days to_days() const NOEXCEPT;
-};
-
-CONSTCD11 bool operator==(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator!=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator< (const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator> (const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator<=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-CONSTCD11 bool operator>=(const year_month_day& x, const year_month_day& y) NOEXCEPT;
-
-CONSTCD14 year_month_day operator+(const year_month_day& ymd, const months& dm) NOEXCEPT;
-CONSTCD14 year_month_day operator+(const months& dm, const year_month_day& ymd) NOEXCEPT;
-CONSTCD14 year_month_day operator-(const year_month_day& ymd, const months& dm) NOEXCEPT;
-CONSTCD11 year_month_day operator+(const year_month_day& ymd, const years& dy)  NOEXCEPT;
-CONSTCD11 year_month_day operator+(const years& dy, const year_month_day& ymd)  NOEXCEPT;
-CONSTCD11 year_month_day operator-(const year_month_day& ymd, const years& dy)  NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day& ymd);
-
-// year_month_day_last
-
-class year_month_day_last
-{
-    julian::year           y_;
-    julian::month_day_last mdl_;
-
-public:
-    CONSTCD11 year_month_day_last(const julian::year& y,
-                                  const julian::month_day_last& mdl) NOEXCEPT;
-
-    CONSTCD14 year_month_day_last& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day_last& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_day_last& operator+=(const years& y)  NOEXCEPT;
-    CONSTCD14 year_month_day_last& operator-=(const years& y)  NOEXCEPT;
-
-    CONSTCD11 julian::year           year()           const NOEXCEPT;
-    CONSTCD11 julian::month          month()          const NOEXCEPT;
-    CONSTCD11 julian::month_day_last month_day_last() const NOEXCEPT;
-    CONSTCD14 julian::day            day()            const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-};
-
-CONSTCD11
-    bool operator==(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator!=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator< (const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator> (const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator<=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-CONSTCD11
-    bool operator>=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT;
-
-CONSTCD14
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const months& dm) NOEXCEPT;
-
-CONSTCD14
-year_month_day_last
-operator+(const months& dm, const year_month_day_last& ymdl) NOEXCEPT;
-
-CONSTCD11
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const years& dy) NOEXCEPT;
-
-CONSTCD11
-year_month_day_last
-operator+(const years& dy, const year_month_day_last& ymdl) NOEXCEPT;
-
-CONSTCD14
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const months& dm) NOEXCEPT;
-
-CONSTCD11
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day_last& ymdl);
-
-// year_month_weekday
-
-class year_month_weekday
-{
-    julian::year            y_;
-    julian::month           m_;
-    julian::weekday_indexed wdi_;
-
-public:
-    CONSTCD11 year_month_weekday(const julian::year& y, const julian::month& m,
-                                   const julian::weekday_indexed& wdi) NOEXCEPT;
-    CONSTCD14 year_month_weekday(const sys_days& dp) NOEXCEPT;
-    CONSTCD14 explicit year_month_weekday(const local_days& dp) NOEXCEPT;
-
-    CONSTCD14 year_month_weekday& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday& operator+=(const years& y)  NOEXCEPT;
-    CONSTCD14 year_month_weekday& operator-=(const years& y)  NOEXCEPT;
-
-    CONSTCD11 julian::year year() const NOEXCEPT;
-    CONSTCD11 julian::month month() const NOEXCEPT;
-    CONSTCD11 julian::weekday weekday() const NOEXCEPT;
-    CONSTCD11 unsigned index() const NOEXCEPT;
-    CONSTCD11 julian::weekday_indexed weekday_indexed() const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD14 bool ok() const NOEXCEPT;
-
-private:
-    static CONSTCD14 year_month_weekday from_days(days dp) NOEXCEPT;
-    CONSTCD14 days to_days() const NOEXCEPT;
-};
-
-CONSTCD11
-    bool operator==(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT;
-CONSTCD11
-    bool operator!=(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const months& dm) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday
-operator+(const months& dm, const year_month_weekday& ymwd) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const years& dy) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator+(const years& dy, const year_month_weekday& ymwd) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const months& dm) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday& ymwdi);
-
-// year_month_weekday_last
-
-class year_month_weekday_last
-{
-    julian::year y_;
-    julian::month m_;
-    julian::weekday_last wdl_;
-
-public:
-    CONSTCD11 year_month_weekday_last(const julian::year& y, const julian::month& m,
-                                      const julian::weekday_last& wdl) NOEXCEPT;
-
-    CONSTCD14 year_month_weekday_last& operator+=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday_last& operator-=(const months& m) NOEXCEPT;
-    CONSTCD14 year_month_weekday_last& operator+=(const years& y) NOEXCEPT;
-    CONSTCD14 year_month_weekday_last& operator-=(const years& y) NOEXCEPT;
-
-    CONSTCD11 julian::year year() const NOEXCEPT;
-    CONSTCD11 julian::month month() const NOEXCEPT;
-    CONSTCD11 julian::weekday weekday() const NOEXCEPT;
-    CONSTCD11 julian::weekday_last weekday_last() const NOEXCEPT;
-
-    CONSTCD14 operator sys_days() const NOEXCEPT;
-    CONSTCD14 explicit operator local_days() const NOEXCEPT;
-    CONSTCD11 bool ok() const NOEXCEPT;
-
-private:
-    CONSTCD14 days to_days() const NOEXCEPT;
-};
-
-CONSTCD11
-bool
-operator==(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT;
-
-CONSTCD11
-bool
-operator!=(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday_last
-operator+(const months& dm, const year_month_weekday_last& ymwdl) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator+(const years& dy, const year_month_weekday_last& ymwdl) NOEXCEPT;
-
-CONSTCD14
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT;
-
-CONSTCD11
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT;
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday_last& ymwdl);
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-inline namespace literals
-{
-
-CONSTCD11 julian::day  operator "" _d(unsigned long long d) NOEXCEPT;
-CONSTCD11 julian::year operator "" _y(unsigned long long y) NOEXCEPT;
-
-// CONSTDATA julian::month jan{1};
-// CONSTDATA julian::month feb{2};
-// CONSTDATA julian::month mar{3};
-// CONSTDATA julian::month apr{4};
-// CONSTDATA julian::month may{5};
-// CONSTDATA julian::month jun{6};
-// CONSTDATA julian::month jul{7};
-// CONSTDATA julian::month aug{8};
-// CONSTDATA julian::month sep{9};
-// CONSTDATA julian::month oct{10};
-// CONSTDATA julian::month nov{11};
-// CONSTDATA julian::month dec{12};
-
-}  // inline namespace literals
-#endif // !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-//----------------+
-// Implementation |
-//----------------+
-
-// day
-
-CONSTCD11 inline day::day(unsigned d) NOEXCEPT : d_(static_cast<unsigned char>(d)) {}
-CONSTCD14 inline day& day::operator++() NOEXCEPT {++d_; return *this;}
-CONSTCD14 inline day day::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline day& day::operator--() NOEXCEPT {--d_; return *this;}
-CONSTCD14 inline day day::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-CONSTCD14 inline day& day::operator+=(const days& d) NOEXCEPT {*this = *this + d; return *this;}
-CONSTCD14 inline day& day::operator-=(const days& d) NOEXCEPT {*this = *this - d; return *this;}
-CONSTCD11 inline day::operator unsigned() const NOEXCEPT {return d_;}
-CONSTCD11 inline bool day::ok() const NOEXCEPT {return 1 <= d_ && d_ <= 31;}
-
-CONSTCD11
-inline
-bool
-operator==(const day& x, const day& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const day& x, const day& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const day& x, const day& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) < static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const day& x, const day& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const day& x, const day& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const day& x, const day& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-days
-operator-(const day& x, const day& y) NOEXCEPT
-{
-    return days{static_cast<days::rep>(static_cast<unsigned>(x)
-                                     - static_cast<unsigned>(y))};
-}
-
-CONSTCD11
-inline
-day
-operator+(const day& x, const days& y) NOEXCEPT
-{
-    return day{static_cast<unsigned>(x) + static_cast<unsigned>(y.count())};
-}
-
-CONSTCD11
-inline
-day
-operator+(const days& x, const day& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD11
-inline
-day
-operator-(const day& x, const days& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const day& d)
-{
-    date::detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::right);
-    os.width(2);
-    os << static_cast<unsigned>(d);
-    return os;
-}
-
-// month
-
-CONSTCD11 inline month::month(unsigned m) NOEXCEPT : m_(static_cast<decltype(m_)>(m)) {}
-CONSTCD14 inline month& month::operator++() NOEXCEPT {if (++m_ == 13) m_ = 1; return *this;}
-CONSTCD14 inline month month::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline month& month::operator--() NOEXCEPT {if (--m_ == 0) m_ = 12; return *this;}
-CONSTCD14 inline month month::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-
-CONSTCD14
-inline
-month&
-month::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-month&
-month::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD11 inline month::operator unsigned() const NOEXCEPT {return m_;}
-CONSTCD11 inline bool month::ok() const NOEXCEPT {return 1 <= m_ && m_ <= 12;}
-
-CONSTCD11
-inline
-bool
-operator==(const month& x, const month& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month& x, const month& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const month& x, const month& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) < static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const month& x, const month& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const month& x, const month& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const month& x, const month& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD14
-inline
-months
-operator-(const month& x, const month& y) NOEXCEPT
-{
-    auto const d = static_cast<unsigned>(x) - static_cast<unsigned>(y);
-    return months(d <= 11 ? d : d + 12);
-}
-
-CONSTCD14
-inline
-month
-operator+(const month& x, const months& y) NOEXCEPT
-{
-    auto const mu = static_cast<long long>(static_cast<unsigned>(x)) - 1 + y.count();
-    auto const yr = (mu >= 0 ? mu : mu-11) / 12;
-    return month{static_cast<unsigned>(mu - yr * 12 + 1)};
-}
-
-CONSTCD14
-inline
-month
-operator+(const months& x, const month& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD14
-inline
-month
-operator-(const month& x, const months& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month& m)
-{
-    switch (static_cast<unsigned>(m))
-    {
-    case 1:
-        os << "Jan";
-        break;
-    case 2:
-        os << "Feb";
-        break;
-    case 3:
-        os << "Mar";
-        break;
-    case 4:
-        os << "Apr";
-        break;
-    case 5:
-        os << "May";
-        break;
-    case 6:
-        os << "Jun";
-        break;
-    case 7:
-        os << "Jul";
-        break;
-    case 8:
-        os << "Aug";
-        break;
-    case 9:
-        os << "Sep";
-        break;
-    case 10:
-        os << "Oct";
-        break;
-    case 11:
-        os << "Nov";
-        break;
-    case 12:
-        os << "Dec";
-        break;
-    default:
-        os << static_cast<unsigned>(m) << " is not a valid month";
-        break;
-    }
-    return os;
-}
-
-// year
-
-CONSTCD11 inline year::year(int y) NOEXCEPT : y_(static_cast<decltype(y_)>(y)) {}
-CONSTCD14 inline year& year::operator++() NOEXCEPT {++y_; return *this;}
-CONSTCD14 inline year year::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline year& year::operator--() NOEXCEPT {--y_; return *this;}
-CONSTCD14 inline year year::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-CONSTCD14 inline year& year::operator+=(const years& y) NOEXCEPT {*this = *this + y; return *this;}
-CONSTCD14 inline year& year::operator-=(const years& y) NOEXCEPT {*this = *this - y; return *this;}
-
-CONSTCD11
-inline
-bool
-year::is_leap() const NOEXCEPT
-{
-    return y_ % 4 == 0;
-}
-
-CONSTCD11 inline year::operator int() const NOEXCEPT {return y_;}
-CONSTCD11 inline bool year::ok() const NOEXCEPT {return true;}
-
-CONSTCD11
-inline
-year
-year::min() NOEXCEPT
-{
-    return year{std::numeric_limits<short>::min()};
-}
-
-CONSTCD11
-inline
-year
-year::max() NOEXCEPT
-{
-    return year{std::numeric_limits<short>::max()};
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year& x, const year& y) NOEXCEPT
-{
-    return static_cast<int>(x) == static_cast<int>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year& x, const year& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year& x, const year& y) NOEXCEPT
-{
-    return static_cast<int>(x) < static_cast<int>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year& x, const year& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year& x, const year& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year& x, const year& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD11
-inline
-years
-operator-(const year& x, const year& y) NOEXCEPT
-{
-    return years{static_cast<int>(x) - static_cast<int>(y)};
-}
-
-CONSTCD11
-inline
-year
-operator+(const year& x, const years& y) NOEXCEPT
-{
-    return year{static_cast<int>(x) + y.count()};
-}
-
-CONSTCD11
-inline
-year
-operator+(const years& x, const year& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD11
-inline
-year
-operator-(const year& x, const years& y) NOEXCEPT
-{
-    return year{static_cast<int>(x) - y.count()};
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year& y)
-{
-    date::detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::internal);
-    os.width(4 + (y < year{0}));
-    os << static_cast<int>(y);
-    return os;
-}
-
-// weekday
-
-CONSTCD11
-inline
-unsigned char
-weekday::weekday_from_days(int z) NOEXCEPT
-{
-    return static_cast<unsigned char>(static_cast<unsigned>(
-        z >= -4 ? (z+4) % 7 : (z+5) % 7 + 6));
-}
-
-CONSTCD11
-inline
-weekday::weekday(unsigned wd) NOEXCEPT
-    : wd_(static_cast<decltype(wd_)>(wd))
-    {}
-
-CONSTCD11
-inline
-weekday::weekday(const sys_days& dp) NOEXCEPT
-    : wd_(weekday_from_days(dp.time_since_epoch().count()))
-    {}
-
-CONSTCD11
-inline
-weekday::weekday(const local_days& dp) NOEXCEPT
-    : wd_(weekday_from_days(dp.time_since_epoch().count()))
-    {}
-
-CONSTCD14 inline weekday& weekday::operator++() NOEXCEPT {if (++wd_ == 7) wd_ = 0; return *this;}
-CONSTCD14 inline weekday weekday::operator++(int) NOEXCEPT {auto tmp(*this); ++(*this); return tmp;}
-CONSTCD14 inline weekday& weekday::operator--() NOEXCEPT {if (wd_-- == 0) wd_ = 6; return *this;}
-CONSTCD14 inline weekday weekday::operator--(int) NOEXCEPT {auto tmp(*this); --(*this); return tmp;}
-
-CONSTCD14
-inline
-weekday&
-weekday::operator+=(const days& d) NOEXCEPT
-{
-    *this = *this + d;
-    return *this;
-}
-
-CONSTCD14
-inline
-weekday&
-weekday::operator-=(const days& d) NOEXCEPT
-{
-    *this = *this - d;
-    return *this;
-}
-
-CONSTCD11
-inline
-weekday::operator unsigned() const NOEXCEPT
-{
-    return static_cast<unsigned>(wd_);
-}
-
-CONSTCD11 inline bool weekday::ok() const NOEXCEPT {return wd_ <= 6;}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday& x, const weekday& y) NOEXCEPT
-{
-    return static_cast<unsigned>(x) == static_cast<unsigned>(y);
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday& x, const weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD14
-inline
-days
-operator-(const weekday& x, const weekday& y) NOEXCEPT
-{
-    auto const diff = static_cast<unsigned>(x) - static_cast<unsigned>(y);
-    return days{diff <= 6 ? diff : diff + 7};
-}
-
-CONSTCD14
-inline
-weekday
-operator+(const weekday& x, const days& y) NOEXCEPT
-{
-    auto const wdu = static_cast<long long>(static_cast<unsigned>(x)) + y.count();
-    auto const wk = (wdu >= 0 ? wdu : wdu-6) / 7;
-    return weekday{static_cast<unsigned>(wdu - wk * 7)};
-}
-
-CONSTCD14
-inline
-weekday
-operator+(const days& x, const weekday& y) NOEXCEPT
-{
-    return y + x;
-}
-
-CONSTCD14
-inline
-weekday
-operator-(const weekday& x, const days& y) NOEXCEPT
-{
-    return x + -y;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday& wd)
-{
-    switch (static_cast<unsigned>(wd))
-    {
-    case 0:
-        os << "Sun";
-        break;
-    case 1:
-        os << "Mon";
-        break;
-    case 2:
-        os << "Tue";
-        break;
-    case 3:
-        os << "Wed";
-        break;
-    case 4:
-        os << "Thu";
-        break;
-    case 5:
-        os << "Fri";
-        break;
-    case 6:
-        os << "Sat";
-        break;
-    default:
-        os << static_cast<unsigned>(wd) << " is not a valid weekday";
-        break;
-    }
-    return os;
-}
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-inline namespace literals
-{
-
-CONSTCD11
-inline
-julian::day
-operator "" _d(unsigned long long d) NOEXCEPT
-{
-    return julian::day{static_cast<unsigned>(d)};
-}
-
-CONSTCD11
-inline
-julian::year
-operator "" _y(unsigned long long y) NOEXCEPT
-{
-    return julian::year(static_cast<int>(y));
-}
-#endif  // !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-CONSTDATA julian::last_spec last{};
-
-CONSTDATA julian::month jan{1};
-CONSTDATA julian::month feb{2};
-CONSTDATA julian::month mar{3};
-CONSTDATA julian::month apr{4};
-CONSTDATA julian::month may{5};
-CONSTDATA julian::month jun{6};
-CONSTDATA julian::month jul{7};
-CONSTDATA julian::month aug{8};
-CONSTDATA julian::month sep{9};
-CONSTDATA julian::month oct{10};
-CONSTDATA julian::month nov{11};
-CONSTDATA julian::month dec{12};
-
-CONSTDATA julian::weekday sun{0u};
-CONSTDATA julian::weekday mon{1u};
-CONSTDATA julian::weekday tue{2u};
-CONSTDATA julian::weekday wed{3u};
-CONSTDATA julian::weekday thu{4u};
-CONSTDATA julian::weekday fri{5u};
-CONSTDATA julian::weekday sat{6u};
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-}  // inline namespace literals
-#endif
-
-// weekday_indexed
-
-CONSTCD11
-inline
-weekday
-weekday_indexed::weekday() const NOEXCEPT
-{
-    return julian::weekday{static_cast<unsigned>(wd_)};
-}
-
-CONSTCD11 inline unsigned weekday_indexed::index() const NOEXCEPT {return index_;}
-
-CONSTCD11
-inline
-bool
-weekday_indexed::ok() const NOEXCEPT
-{
-    return weekday().ok() && 1 <= index_ && index_ <= 5;
-}
-
-CONSTCD11
-inline
-weekday_indexed::weekday_indexed(const julian::weekday& wd, unsigned index) NOEXCEPT
-    : wd_(static_cast<decltype(wd_)>(static_cast<unsigned>(wd)))
-    , index_(static_cast<decltype(index_)>(index))
-    {}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_indexed& wdi)
-{
-    return os << wdi.weekday() << '[' << wdi.index() << ']';
-}
-
-CONSTCD11
-inline
-weekday_indexed
-weekday::operator[](unsigned index) const NOEXCEPT
-{
-    return {*this, index};
-}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT
-{
-    return x.weekday() == y.weekday() && x.index() == y.index();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday_indexed& x, const weekday_indexed& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-// weekday_last
-
-CONSTCD11 inline julian::weekday weekday_last::weekday() const NOEXCEPT {return wd_;}
-CONSTCD11 inline bool weekday_last::ok() const NOEXCEPT {return wd_.ok();}
-CONSTCD11 inline weekday_last::weekday_last(const julian::weekday& wd) NOEXCEPT : wd_(wd) {}
-
-CONSTCD11
-inline
-bool
-operator==(const weekday_last& x, const weekday_last& y) NOEXCEPT
-{
-    return x.weekday() == y.weekday();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const weekday_last& x, const weekday_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const weekday_last& wdl)
-{
-    return os << wdl.weekday() << "[last]";
-}
-
-CONSTCD11
-inline
-weekday_last
-weekday::operator[](last_spec) const NOEXCEPT
-{
-    return weekday_last{*this};
-}
-
-// year_month
-
-CONSTCD11
-inline
-year_month::year_month(const julian::year& y, const julian::month& m) NOEXCEPT
-    : y_(y)
-    , m_(m)
-    {}
-
-CONSTCD11 inline year year_month::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline bool year_month::ok() const NOEXCEPT {return y_.ok() && m_.ok();}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator+=(const months& dm) NOEXCEPT
-{
-    *this = *this + dm;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator-=(const months& dm) NOEXCEPT
-{
-    *this = *this - dm;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator+=(const years& dy) NOEXCEPT
-{
-    *this = *this + dy;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month&
-year_month::operator-=(const years& dy) NOEXCEPT
-{
-    *this = *this - dy;
-    return *this;
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.month() < y.month()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-CONSTCD14
-inline
-year_month
-operator+(const year_month& ym, const months& dm) NOEXCEPT
-{
-    auto dmi = static_cast<int>(static_cast<unsigned>(ym.month())) - 1 + dm.count();
-    auto dy = (dmi >= 0 ? dmi : dmi-11) / 12;
-    dmi = dmi - dy * 12 + 1;
-    return (ym.year() + years(dy)) / month(static_cast<unsigned>(dmi));
-}
-
-CONSTCD14
-inline
-year_month
-operator+(const months& dm, const year_month& ym) NOEXCEPT
-{
-    return ym + dm;
-}
-
-CONSTCD14
-inline
-year_month
-operator-(const year_month& ym, const months& dm) NOEXCEPT
-{
-    return ym + -dm;
-}
-
-CONSTCD11
-inline
-months
-operator-(const year_month& x, const year_month& y) NOEXCEPT
-{
-    return (x.year() - y.year()) +
-            months(static_cast<unsigned>(x.month()) - static_cast<unsigned>(y.month()));
-}
-
-CONSTCD11
-inline
-year_month
-operator+(const year_month& ym, const years& dy) NOEXCEPT
-{
-    return (ym.year() + dy) / ym.month();
-}
-
-CONSTCD11
-inline
-year_month
-operator+(const years& dy, const year_month& ym) NOEXCEPT
-{
-    return ym + dy;
-}
-
-CONSTCD11
-inline
-year_month
-operator-(const year_month& ym, const years& dy) NOEXCEPT
-{
-    return ym + -dy;
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month& ym)
-{
-    return os << ym.year() << '/' << ym.month();
-}
-
-// month_day
-
-CONSTCD11
-inline
-month_day::month_day(const julian::month& m, const julian::day& d) NOEXCEPT
-    : m_(m)
-    , d_(d)
-    {}
-
-CONSTCD11 inline julian::month month_day::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline julian::day month_day::day() const NOEXCEPT {return d_;}
-
-CONSTCD14
-inline
-bool
-month_day::ok() const NOEXCEPT
-{
-    CONSTDATA julian::day d[] =
-        {31_d, 29_d, 31_d, 30_d, 31_d, 30_d, 31_d, 31_d, 30_d, 31_d, 30_d, 31_d};
-    return m_.ok() && 1_d <= d_ && d_ <= d[static_cast<unsigned>(m_)-1];
-}
-
-CONSTCD11
-inline
-bool
-operator==(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return x.month() == y.month() && x.day() == y.day();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return x.month() < y.month() ? true
-        : (x.month() > y.month() ? false
-        : (x.day() < y.day()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const month_day& x, const month_day& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day& md)
-{
-    return os << md.month() << '/' << md.day();
-}
-
-// month_day_last
-
-CONSTCD11 inline month month_day_last::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline bool month_day_last::ok() const NOEXCEPT {return m_.ok();}
-CONSTCD11 inline month_day_last::month_day_last(const julian::month& m) NOEXCEPT : m_(m) {}
-
-CONSTCD11
-inline
-bool
-operator==(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return x.month() == y.month();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return x.month() < y.month();
-}
-
-CONSTCD11
-inline
-bool
-operator>(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const month_day_last& x, const month_day_last& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_day_last& mdl)
-{
-    return os << mdl.month() << "/last";
-}
-
-// month_weekday
-
-CONSTCD11
-inline
-month_weekday::month_weekday(const julian::month& m,
-                             const julian::weekday_indexed& wdi) NOEXCEPT
-    : m_(m)
-    , wdi_(wdi)
-    {}
-
-CONSTCD11 inline month month_weekday::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday_indexed
-month_weekday::weekday_indexed() const NOEXCEPT
-{
-    return wdi_;
-}
-
-CONSTCD11
-inline
-bool
-month_weekday::ok() const NOEXCEPT
-{
-    return m_.ok() && wdi_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const month_weekday& x, const month_weekday& y) NOEXCEPT
-{
-    return x.month() == y.month() && x.weekday_indexed() == y.weekday_indexed();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_weekday& x, const month_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday& mwd)
-{
-    return os << mwd.month() << '/' << mwd.weekday_indexed();
-}
-
-// month_weekday_last
-
-CONSTCD11
-inline
-month_weekday_last::month_weekday_last(const julian::month& m,
-                                       const julian::weekday_last& wdl) NOEXCEPT
-    : m_(m)
-    , wdl_(wdl)
-    {}
-
-CONSTCD11 inline month month_weekday_last::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday_last
-month_weekday_last::weekday_last() const NOEXCEPT
-{
-    return wdl_;
-}
-
-CONSTCD11
-inline
-bool
-month_weekday_last::ok() const NOEXCEPT
-{
-    return m_.ok() && wdl_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT
-{
-    return x.month() == y.month() && x.weekday_last() == y.weekday_last();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const month_weekday_last& x, const month_weekday_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const month_weekday_last& mwdl)
-{
-    return os << mwdl.month() << '/' << mwdl.weekday_last();
-}
-
-// year_month_day_last
-
-CONSTCD11
-inline
-year_month_day_last::year_month_day_last(const julian::year& y,
-                                         const julian::month_day_last& mdl) NOEXCEPT
-    : y_(y)
-    , mdl_(mdl)
-    {}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day_last&
-year_month_day_last::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_month_day_last::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_day_last::month() const NOEXCEPT {return mdl_.month();}
-
-CONSTCD11
-inline
-month_day_last
-year_month_day_last::month_day_last() const NOEXCEPT
-{
-    return mdl_;
-}
-
-CONSTCD14
-inline
-day
-year_month_day_last::day() const NOEXCEPT
-{
-    CONSTDATA julian::day d[] =
-        {31_d, 28_d, 31_d, 30_d, 31_d, 30_d, 31_d, 31_d, 30_d, 31_d, 30_d, 31_d};
-    return month() != feb || !y_.is_leap() ? d[static_cast<unsigned>(month())-1] : 29_d;
-}
-
-CONSTCD14
-inline
-year_month_day_last::operator sys_days() const NOEXCEPT
-{
-    return sys_days(year()/month()/day());
-}
-
-CONSTCD14
-inline
-year_month_day_last::operator local_days() const NOEXCEPT
-{
-    return local_days(year()/month()/day());
-}
-
-CONSTCD11
-inline
-bool
-year_month_day_last::ok() const NOEXCEPT
-{
-    return y_.ok() && mdl_.ok();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month_day_last() == y.month_day_last();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.month_day_last() < y.month_day_last()));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_month_day_last& x, const year_month_day_last& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day_last& ymdl)
-{
-    return os << ymdl.year() << '/' << ymdl.month_day_last();
-}
-
-CONSTCD14
-inline
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const months& dm) NOEXCEPT
-{
-    return (ymdl.year() / ymdl.month() + dm) / last;
-}
-
-CONSTCD14
-inline
-year_month_day_last
-operator+(const months& dm, const year_month_day_last& ymdl) NOEXCEPT
-{
-    return ymdl + dm;
-}
-
-CONSTCD14
-inline
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const months& dm) NOEXCEPT
-{
-    return ymdl + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator+(const year_month_day_last& ymdl, const years& dy) NOEXCEPT
-{
-    return {ymdl.year()+dy, ymdl.month_day_last()};
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator+(const years& dy, const year_month_day_last& ymdl) NOEXCEPT
-{
-    return ymdl + dy;
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator-(const year_month_day_last& ymdl, const years& dy) NOEXCEPT
-{
-    return ymdl + (-dy);
-}
-
-// year_month_day
-
-CONSTCD11
-inline
-year_month_day::year_month_day(const julian::year& y, const julian::month& m,
-                               const julian::day& d) NOEXCEPT
-    : y_(y)
-    , m_(m)
-    , d_(d)
-    {}
-
-CONSTCD14
-inline
-year_month_day::year_month_day(const year_month_day_last& ymdl) NOEXCEPT
-    : y_(ymdl.year())
-    , m_(ymdl.month())
-    , d_(ymdl.day())
-    {}
-
-CONSTCD14
-inline
-year_month_day::year_month_day(sys_days dp) NOEXCEPT
-    : year_month_day(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_month_day::year_month_day(local_days dp) NOEXCEPT
-    : year_month_day(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD11 inline year year_month_day::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_day::month() const NOEXCEPT {return m_;}
-CONSTCD11 inline day year_month_day::day() const NOEXCEPT {return d_;}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_day&
-year_month_day::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD14
-inline
-days
-year_month_day::to_days() const NOEXCEPT
-{
-    static_assert(std::numeric_limits<unsigned>::digits >= 18,
-             "This algorithm has not been ported to a 16 bit unsigned integer");
-    static_assert(std::numeric_limits<int>::digits >= 20,
-             "This algorithm has not been ported to a 16 bit signed integer");
-    auto const y = static_cast<int>(y_) - (m_ <= feb);
-    auto const m = static_cast<unsigned>(m_);
-    auto const d = static_cast<unsigned>(d_);
-    auto const era = (y >= 0 ? y : y-3) / 4;
-    auto const yoe = static_cast<unsigned>(y - era * 4);       // [0, 3]
-    auto const doy = (153*(m > 2 ? m-3 : m+9) + 2)/5 + d-1;    // [0, 365]
-    auto const doe = yoe * 365 + doy;                          // [0, 1460]
-    return days{era * 1461 + static_cast<int>(doe) - 719470};
-}
-
-CONSTCD14
-inline
-year_month_day::operator sys_days() const NOEXCEPT
-{
-    return sys_days{to_days()};
-}
-
-CONSTCD14
-inline
-year_month_day::operator local_days() const NOEXCEPT
-{
-    return local_days{to_days()};
-}
-
-CONSTCD14
-inline
-bool
-year_month_day::ok() const NOEXCEPT
-{
-    if (!(y_.ok() && m_.ok()))
-        return false;
-    return 1_d <= d_ && d_ <= (y_/m_/last).day();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month() && x.day() == y.day();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-CONSTCD11
-inline
-bool
-operator<(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return x.year() < y.year() ? true
-        : (x.year() > y.year() ? false
-        : (x.month() < y.month() ? true
-        : (x.month() > y.month() ? false
-        : (x.day() < y.day()))));
-}
-
-CONSTCD11
-inline
-bool
-operator>(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return y < x;
-}
-
-CONSTCD11
-inline
-bool
-operator<=(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return !(y < x);
-}
-
-CONSTCD11
-inline
-bool
-operator>=(const year_month_day& x, const year_month_day& y) NOEXCEPT
-{
-    return !(x < y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_day& ymd)
-{
-    date::detail::save_stream<CharT, Traits> _(os);
-    os.fill('0');
-    os.flags(std::ios::dec | std::ios::right);
-    os << ymd.year() << '-';
-    os.width(2);
-    os << static_cast<unsigned>(ymd.month()) << '-';
-    os << ymd.day();
-    return os;
-}
-
-CONSTCD14
-inline
-year_month_day
-year_month_day::from_days(days dp) NOEXCEPT
-{
-    static_assert(std::numeric_limits<unsigned>::digits >= 18,
-             "This algorithm has not been ported to a 16 bit unsigned integer");
-    static_assert(std::numeric_limits<int>::digits >= 20,
-             "This algorithm has not been ported to a 16 bit signed integer");
-    auto const z = dp.count() + 719470;
-    auto const era = (z >= 0 ? z : z - 1460) / 1461;
-    auto const doe = static_cast<unsigned>(z - era * 1461);          // [0, 1460]
-    auto const yoe = (doe - doe/1460) / 365;                         // [0, 3]
-    auto const y = static_cast<sys_days::rep>(yoe) + era * 4;
-    auto const doy = doe - 365*yoe;                                  // [0, 365]
-    auto const mp = (5*doy + 2)/153;                                 // [0, 11]
-    auto const d = doy - (153*mp+2)/5 + 1;                           // [1, 31]
-    auto const m = mp < 10 ? mp+3 : mp-9;                            // [1, 12]
-    return year_month_day{julian::year{y + (m <= 2)}, julian::month(m), julian::day(d)};
-}
-
-CONSTCD14
-inline
-year_month_day
-operator+(const year_month_day& ymd, const months& dm) NOEXCEPT
-{
-    return (ymd.year() / ymd.month() + dm) / ymd.day();
-}
-
-CONSTCD14
-inline
-year_month_day
-operator+(const months& dm, const year_month_day& ymd) NOEXCEPT
-{
-    return ymd + dm;
-}
-
-CONSTCD14
-inline
-year_month_day
-operator-(const year_month_day& ymd, const months& dm) NOEXCEPT
-{
-    return ymd + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_day
-operator+(const year_month_day& ymd, const years& dy) NOEXCEPT
-{
-    return (ymd.year() + dy) / ymd.month() / ymd.day();
-}
-
-CONSTCD11
-inline
-year_month_day
-operator+(const years& dy, const year_month_day& ymd) NOEXCEPT
-{
-    return ymd + dy;
-}
-
-CONSTCD11
-inline
-year_month_day
-operator-(const year_month_day& ymd, const years& dy) NOEXCEPT
-{
-    return ymd + (-dy);
-}
-
-// year_month_weekday
-
-CONSTCD11
-inline
-year_month_weekday::year_month_weekday(const julian::year& y, const julian::month& m,
-                                       const julian::weekday_indexed& wdi)
-        NOEXCEPT
-    : y_(y)
-    , m_(m)
-    , wdi_(wdi)
-    {}
-
-CONSTCD14
-inline
-year_month_weekday::year_month_weekday(const sys_days& dp) NOEXCEPT
-    : year_month_weekday(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_month_weekday::year_month_weekday(const local_days& dp) NOEXCEPT
-    : year_month_weekday(from_days(dp.time_since_epoch()))
-    {}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday&
-year_month_weekday::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_month_weekday::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_weekday::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday
-year_month_weekday::weekday() const NOEXCEPT
-{
-    return wdi_.weekday();
-}
-
-CONSTCD11
-inline
-unsigned
-year_month_weekday::index() const NOEXCEPT
-{
-    return wdi_.index();
-}
-
-CONSTCD11
-inline
-weekday_indexed
-year_month_weekday::weekday_indexed() const NOEXCEPT
-{
-    return wdi_;
-}
-
-CONSTCD14
-inline
-year_month_weekday::operator sys_days() const NOEXCEPT
-{
-    return sys_days{to_days()};
-}
-
-CONSTCD14
-inline
-year_month_weekday::operator local_days() const NOEXCEPT
-{
-    return local_days{to_days()};
-}
-
-CONSTCD14
-inline
-bool
-year_month_weekday::ok() const NOEXCEPT
-{
-    if (!y_.ok() || !m_.ok() || !wdi_.weekday().ok() || wdi_.index() < 1)
-        return false;
-    if (wdi_.index() <= 4)
-        return true;
-    auto d2 = wdi_.weekday() - julian::weekday(y_/m_/1) + days((wdi_.index()-1)*7 + 1);
-    return static_cast<unsigned>(d2.count()) <= static_cast<unsigned>((y_/m_/last).day());
-}
-
-CONSTCD14
-inline
-year_month_weekday
-year_month_weekday::from_days(days d) NOEXCEPT
-{
-    sys_days dp{d};
-    auto const wd = julian::weekday(dp);
-    auto const ymd = year_month_day(dp);
-    return {ymd.year(), ymd.month(), wd[(static_cast<unsigned>(ymd.day())-1)/7+1]};
-}
-
-CONSTCD14
-inline
-days
-year_month_weekday::to_days() const NOEXCEPT
-{
-    auto d = sys_days(y_/m_/1);
-    return (d + (wdi_.weekday() - julian::weekday(d) + days{(wdi_.index()-1)*7})
-           ).time_since_epoch();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month() &&
-           x.weekday_indexed() == y.weekday_indexed();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_weekday& x, const year_month_weekday& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday& ymwdi)
-{
-    return os << ymwdi.year() << '/' << ymwdi.month()
-              << '/' << ymwdi.weekday_indexed();
-}
-
-CONSTCD14
-inline
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const months& dm) NOEXCEPT
-{
-    return (ymwd.year() / ymwd.month() + dm) / ymwd.weekday_indexed();
-}
-
-CONSTCD14
-inline
-year_month_weekday
-operator+(const months& dm, const year_month_weekday& ymwd) NOEXCEPT
-{
-    return ymwd + dm;
-}
-
-CONSTCD14
-inline
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const months& dm) NOEXCEPT
-{
-    return ymwd + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator+(const year_month_weekday& ymwd, const years& dy) NOEXCEPT
-{
-    return {ymwd.year()+dy, ymwd.month(), ymwd.weekday_indexed()};
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator+(const years& dy, const year_month_weekday& ymwd) NOEXCEPT
-{
-    return ymwd + dy;
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator-(const year_month_weekday& ymwd, const years& dy) NOEXCEPT
-{
-    return ymwd + (-dy);
-}
-
-// year_month_weekday_last
-
-CONSTCD11
-inline
-year_month_weekday_last::year_month_weekday_last(const julian::year& y,
-                                                 const julian::month& m,
-                                                 const julian::weekday_last& wdl) NOEXCEPT
-    : y_(y)
-    , m_(m)
-    , wdl_(wdl)
-    {}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator+=(const months& m) NOEXCEPT
-{
-    *this = *this + m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator-=(const months& m) NOEXCEPT
-{
-    *this = *this - m;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator+=(const years& y) NOEXCEPT
-{
-    *this = *this + y;
-    return *this;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last&
-year_month_weekday_last::operator-=(const years& y) NOEXCEPT
-{
-    *this = *this - y;
-    return *this;
-}
-
-CONSTCD11 inline year year_month_weekday_last::year() const NOEXCEPT {return y_;}
-CONSTCD11 inline month year_month_weekday_last::month() const NOEXCEPT {return m_;}
-
-CONSTCD11
-inline
-weekday
-year_month_weekday_last::weekday() const NOEXCEPT
-{
-    return wdl_.weekday();
-}
-
-CONSTCD11
-inline
-weekday_last
-year_month_weekday_last::weekday_last() const NOEXCEPT
-{
-    return wdl_;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last::operator sys_days() const NOEXCEPT
-{
-    return sys_days{to_days()};
-}
-
-CONSTCD14
-inline
-year_month_weekday_last::operator local_days() const NOEXCEPT
-{
-    return local_days{to_days()};
-}
-
-CONSTCD11
-inline
-bool
-year_month_weekday_last::ok() const NOEXCEPT
-{
-    return y_.ok() && m_.ok() && wdl_.ok();
-}
-
-CONSTCD14
-inline
-days
-year_month_weekday_last::to_days() const NOEXCEPT
-{
-    auto const d = sys_days(y_/m_/last);
-    return (d - (julian::weekday{d} - wdl_.weekday())).time_since_epoch();
-}
-
-CONSTCD11
-inline
-bool
-operator==(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT
-{
-    return x.year() == y.year() && x.month() == y.month() &&
-           x.weekday_last() == y.weekday_last();
-}
-
-CONSTCD11
-inline
-bool
-operator!=(const year_month_weekday_last& x, const year_month_weekday_last& y) NOEXCEPT
-{
-    return !(x == y);
-}
-
-template<class CharT, class Traits>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const year_month_weekday_last& ymwdl)
-{
-    return os << ymwdl.year() << '/' << ymwdl.month() << '/' << ymwdl.weekday_last();
-}
-
-CONSTCD14
-inline
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT
-{
-    return (ymwdl.year() / ymwdl.month() + dm) / ymwdl.weekday_last();
-}
-
-CONSTCD14
-inline
-year_month_weekday_last
-operator+(const months& dm, const year_month_weekday_last& ymwdl) NOEXCEPT
-{
-    return ymwdl + dm;
-}
-
-CONSTCD14
-inline
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const months& dm) NOEXCEPT
-{
-    return ymwdl + (-dm);
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator+(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT
-{
-    return {ymwdl.year()+dy, ymwdl.month(), ymwdl.weekday_last()};
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator+(const years& dy, const year_month_weekday_last& ymwdl) NOEXCEPT
-{
-    return ymwdl + dy;
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator-(const year_month_weekday_last& ymwdl, const years& dy) NOEXCEPT
-{
-    return ymwdl + (-dy);
-}
-
-// year_month from operator/()
-
-CONSTCD11
-inline
-year_month
-operator/(const year& y, const month& m) NOEXCEPT
-{
-    return {y, m};
-}
-
-CONSTCD11
-inline
-year_month
-operator/(const year& y, int   m) NOEXCEPT
-{
-    return y / month(static_cast<unsigned>(m));
-}
-
-// month_day from operator/()
-
-CONSTCD11
-inline
-month_day
-operator/(const month& m, const day& d) NOEXCEPT
-{
-    return {m, d};
-}
-
-CONSTCD11
-inline
-month_day
-operator/(const day& d, const month& m) NOEXCEPT
-{
-    return m / d;
-}
-
-CONSTCD11
-inline
-month_day
-operator/(const month& m, int d) NOEXCEPT
-{
-    return m / day(static_cast<unsigned>(d));
-}
-
-CONSTCD11
-inline
-month_day
-operator/(int m, const day& d) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m)) / d;
-}
-
-CONSTCD11 inline month_day operator/(const day& d, int m) NOEXCEPT {return m / d;}
-
-// month_day_last from operator/()
-
-CONSTCD11
-inline
-month_day_last
-operator/(const month& m, last_spec) NOEXCEPT
-{
-    return month_day_last{m};
-}
-
-CONSTCD11
-inline
-month_day_last
-operator/(last_spec, const month& m) NOEXCEPT
-{
-    return m/last;
-}
-
-CONSTCD11
-inline
-month_day_last
-operator/(int m, last_spec) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m))/last;
-}
-
-CONSTCD11
-inline
-month_day_last
-operator/(last_spec, int m) NOEXCEPT
-{
-    return m/last;
-}
-
-// month_weekday from operator/()
-
-CONSTCD11
-inline
-month_weekday
-operator/(const month& m, const weekday_indexed& wdi) NOEXCEPT
-{
-    return {m, wdi};
-}
-
-CONSTCD11
-inline
-month_weekday
-operator/(const weekday_indexed& wdi, const month& m) NOEXCEPT
-{
-    return m / wdi;
-}
-
-CONSTCD11
-inline
-month_weekday
-operator/(int m, const weekday_indexed& wdi) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m)) / wdi;
-}
-
-CONSTCD11
-inline
-month_weekday
-operator/(const weekday_indexed& wdi, int m) NOEXCEPT
-{
-    return m / wdi;
-}
-
-// month_weekday_last from operator/()
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(const month& m, const weekday_last& wdl) NOEXCEPT
-{
-    return {m, wdl};
-}
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(const weekday_last& wdl, const month& m) NOEXCEPT
-{
-    return m / wdl;
-}
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(int m, const weekday_last& wdl) NOEXCEPT
-{
-    return month(static_cast<unsigned>(m)) / wdl;
-}
-
-CONSTCD11
-inline
-month_weekday_last
-operator/(const weekday_last& wdl, int m) NOEXCEPT
-{
-    return m / wdl;
-}
-
-// year_month_day from operator/()
-
-CONSTCD11
-inline
-year_month_day
-operator/(const year_month& ym, const day& d) NOEXCEPT
-{
-    return {ym.year(), ym.month(), d};
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const year_month& ym, int d)  NOEXCEPT
-{
-    return ym / day(static_cast<unsigned>(d));
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const year& y, const month_day& md) NOEXCEPT
-{
-    return y / md.month() / md.day();
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(int y, const month_day& md) NOEXCEPT
-{
-    return year(y) / md;
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const month_day& md, const year& y)  NOEXCEPT
-{
-    return y / md;
-}
-
-CONSTCD11
-inline
-year_month_day
-operator/(const month_day& md, int y) NOEXCEPT
-{
-    return year(y) / md;
-}
-
-// year_month_day_last from operator/()
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const year_month& ym, last_spec) NOEXCEPT
-{
-    return {ym.year(), month_day_last{ym.month()}};
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const year& y, const month_day_last& mdl) NOEXCEPT
-{
-    return {y, mdl};
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(int y, const month_day_last& mdl) NOEXCEPT
-{
-    return year(y) / mdl;
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const month_day_last& mdl, const year& y) NOEXCEPT
-{
-    return y / mdl;
-}
-
-CONSTCD11
-inline
-year_month_day_last
-operator/(const month_day_last& mdl, int y) NOEXCEPT
-{
-    return year(y) / mdl;
-}
-
-// year_month_weekday from operator/()
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const year_month& ym, const weekday_indexed& wdi) NOEXCEPT
-{
-    return {ym.year(), ym.month(), wdi};
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const year& y, const month_weekday& mwd) NOEXCEPT
-{
-    return {y, mwd.month(), mwd.weekday_indexed()};
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(int y, const month_weekday& mwd) NOEXCEPT
-{
-    return year(y) / mwd;
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const month_weekday& mwd, const year& y) NOEXCEPT
-{
-    return y / mwd;
-}
-
-CONSTCD11
-inline
-year_month_weekday
-operator/(const month_weekday& mwd, int y) NOEXCEPT
-{
-    return year(y) / mwd;
-}
-
-// year_month_weekday_last from operator/()
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const year_month& ym, const weekday_last& wdl) NOEXCEPT
-{
-    return {ym.year(), ym.month(), wdl};
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const year& y, const month_weekday_last& mwdl) NOEXCEPT
-{
-    return {y, mwdl.month(), mwdl.weekday_last()};
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(int y, const month_weekday_last& mwdl) NOEXCEPT
-{
-    return year(y) / mwdl;
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, const year& y) NOEXCEPT
-{
-    return y / mwdl;
-}
-
-CONSTCD11
-inline
-year_month_weekday_last
-operator/(const month_weekday_last& mwdl, int y) NOEXCEPT
-{
-    return year(y) / mwdl;
-}
-
-}  // namespace julian
-
-#endif  // JULIAN_H
diff --git a/thirdparty/date/include/date/ptz.h b/thirdparty/date/include/date/ptz.h
deleted file mode 100644
index 78be1d2..0000000
--- a/thirdparty/date/include/date/ptz.h
+++ /dev/null
@@ -1,592 +0,0 @@
-#ifndef PTZ_H
-#define PTZ_H
-
-// The MIT License (MIT)
-//
-// Copyright (c) 2017 Howard Hinnant
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-
-// This header allows Posix-style time zones as specified for TZ here:
-// http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap08.html#tag_08_03
-//
-// Posix::time_zone can be constructed with a posix-style string and then used in
-// a zoned_time like so:
-//
-// zoned_time<system_clock::duration, Posix::time_zone> zt{"EST5EDT,M3.2.0,M11.1.0",
-//                                                         system_clock::now()};
-// or:
-//
-// Posix::time_zone tz{"EST5EDT,M3.2.0,M11.1.0"};
-// zoned_time<system_clock::duration, Posix::time_zone> zt{tz, system_clock::now()};
-//
-// Note, Posix-style time zones are not recommended for all of the reasons described here:
-// https://stackoverflow.com/tags/timezone/info
-//
-// They are provided here as a non-trivial custom time zone example, and if you really
-// have to have Posix time zones, you're welcome to use this one.
-
-#include "date/tz.h"
-#include <cctype>
-#include <ostream>
-#include <string>
-
-namespace Posix
-{
-
-namespace detail
-{
-
-#if HAS_STRING_VIEW
-
-using string_t = std::string_view;
-
-#else  // !HAS_STRING_VIEW
-
-using string_t = std::string;
-
-#endif  // !HAS_STRING_VIEW
-
-class rule;
-
-void throw_invalid(const string_t& s, unsigned i, const string_t& message);
-unsigned read_date(const string_t& s, unsigned i, rule& r);
-unsigned read_name(const string_t& s, unsigned i, std::string& name);
-unsigned read_signed_time(const string_t& s, unsigned i, std::chrono::seconds& t);
-unsigned read_unsigned_time(const string_t& s, unsigned i, std::chrono::seconds& t);
-unsigned read_unsigned(const string_t& s, unsigned i,  unsigned limit, unsigned& u);
-
-class rule
-{
-    enum {off, J, M, N};
-
-    date::month m_;
-    date::weekday wd_;
-    unsigned short n_    : 14;
-    unsigned short mode_ : 2;
-    std::chrono::duration<std::int32_t> time_ = std::chrono::hours{2};
-
-public:
-    rule() : mode_(off) {}
-
-    bool ok() const {return mode_ != off;}
-    date::local_seconds operator()(date::year y) const;
-
-    friend std::ostream& operator<<(std::ostream& os, const rule& r);
-    friend unsigned read_date(const string_t& s, unsigned i, rule& r);
-};
-
-inline
-date::local_seconds
-rule::operator()(date::year y) const
-{
-    using namespace date;
-    using sec = std::chrono::seconds;
-    date::local_seconds t;
-    switch (mode_)
-    {
-    case J:
-        t = local_days{y/jan/0} + days{n_ + (y.is_leap() && n_ > 59)} + sec{time_};
-        break;
-    case M:
-        t = (n_ == 5 ? local_days{y/m_/wd_[last]} : local_days{y/m_/wd_[n_]}) + sec{time_};
-        break;
-    case N:
-        t = local_days{y/jan/1} + days{n_} + sec{time_};
-        break;
-    default:
-        assert(!"rule called with bad mode");
-    }
-    return t;
-}
-
-inline
-std::ostream&
-operator<<(std::ostream& os, const rule& r)
-{
-    switch (r.mode_)
-    {
-    case rule::J:
-        os << 'J' << r.n_ << date::format(" %T", r.time_);
-        break;
-    case rule::M:
-        if (r.n_ == 5)
-            os << r.m_/r.wd_[date::last];
-        else
-            os << r.m_/r.wd_[r.n_];
-        os <<  date::format(" %T", r.time_);
-        break;
-    case rule::N:
-        os << r.n_ << date::format(" %T", r.time_);
-        break;
-    default:
-        break;
-    }
-    return os;
-}
-
-}  // namespace detail
-
-class time_zone
-{
-    std::string          std_abbrev_;
-    std::string          dst_abbrev_ = {};
-    std::chrono::seconds offset_;
-    std::chrono::seconds save_ = std::chrono::hours{1};
-    detail::rule         start_rule_;
-    detail::rule         end_rule_;
-
-public:
-    explicit time_zone(const detail::string_t& name);
-
-    template <class Duration>
-        date::sys_info   get_info(date::sys_time<Duration> st) const;
-    template <class Duration>
-        date::local_info get_info(date::local_time<Duration> tp) const;
-
-    template <class Duration>
-        date::sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-        to_sys(date::local_time<Duration> tp) const;
-
-    template <class Duration>
-        date::sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-        to_sys(date::local_time<Duration> tp, date::choose z) const;
-
-    template <class Duration>
-        date::local_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-        to_local(date::sys_time<Duration> tp) const;
-
-    friend std::ostream& operator<<(std::ostream& os, const time_zone& z);
-
-    const time_zone* operator->() const {return this;}
-};
-
-inline
-time_zone::time_zone(const detail::string_t& s)
-{
-    using namespace detail;
-    auto i = read_name(s, 0, std_abbrev_);
-    i = read_signed_time(s, i, offset_);
-    offset_ = -offset_;
-    if (i != s.size())
-    {
-        i = read_name(s, i, dst_abbrev_);
-        if (i != s.size())
-        {
-            if (s[i] != ',')
-                i = read_signed_time(s, i, save_);
-            if (i != s.size())
-            {
-                if (s[i] != ',')
-                    throw_invalid(s, i, "Expecting end of string or ',' to start rule");
-                ++i;
-                i = read_date(s, i, start_rule_);
-                if (i == s.size() || s[i] != ',')
-                    throw_invalid(s, i, "Expecting ',' and then the ending rule");
-                ++i;
-                i = read_date(s, i, end_rule_);
-                if (i != s.size())
-                    throw_invalid(s, i, "Found unexpected trailing characters");
-            }
-        }
-    }
-}
-
-template <class Duration>
-date::sys_info
-time_zone::get_info(date::sys_time<Duration> st) const
-{
-    using namespace date;
-    using namespace std::chrono;
-    sys_info r{};
-    r.offset = offset_;
-    if (start_rule_.ok())
-    {
-        auto y = year_month_day{floor<days>(st)}.year();
-        auto start = sys_seconds{(start_rule_(y) - offset_).time_since_epoch()};
-        auto end   = sys_seconds{(end_rule_(y) - (offset_ + save_)).time_since_epoch()};
-        if (start <= st && st < end)
-        {
-            r.begin = start;
-            r.end = end;
-            r.offset += save_;
-            r.save = ceil<minutes>(save_);
-            r.abbrev = dst_abbrev_;
-        }
-        else if (st < start)
-        {
-            r.begin = sys_seconds{(end_rule_(y-years{1}) -
-                                   (offset_ + save_)).time_since_epoch()};
-            r.end = start;
-            r.abbrev = std_abbrev_;
-        }
-        else  // st >= end
-        {
-            r.begin = end;
-            r.end = sys_seconds{(start_rule_(y+years{1}) - offset_).time_since_epoch()};
-            r.abbrev = std_abbrev_;
-        }
-    }
-    else  //  constant offset
-    {
-        r.begin = sys_days{year::min()/jan/1};
-        r.end   = sys_days{year::max()/dec/last};
-        r.abbrev = std_abbrev_;
-    }
-    return r;
-}
-
-template <class Duration>
-date::local_info
-time_zone::get_info(date::local_time<Duration> tp) const
-{
-    using namespace date;
-    using namespace std::chrono;
-    local_info r{};
-    if (start_rule_.ok())
-    {
-        auto y = year_month_day{floor<days>(tp)}.year();
-        auto start = sys_seconds{(start_rule_(y) - offset_).time_since_epoch()};
-        auto end   = sys_seconds{(end_rule_(y) - (offset_ + save_)).time_since_epoch()};
-        auto utcs = sys_seconds{floor<seconds>(tp - offset_).time_since_epoch()};
-        auto utcd = sys_seconds{floor<seconds>(tp - (offset_ + save_)).time_since_epoch()};
-        if ((utcs < start) != (utcd < start))
-        {
-            r.first.begin = sys_seconds{(end_rule_(y-years{1}) -
-                                         (offset_ + save_)).time_since_epoch()};
-            r.first.end = start;
-            r.first.offset = offset_;
-            r.first.abbrev = std_abbrev_;
-            r.second.begin = start;
-            r.second.end = end;
-            r.second.abbrev = dst_abbrev_;
-            r.second.offset = offset_ + save_;
-            r.second.save = ceil<minutes>(save_);
-            r.result = save_ > seconds{0} ? local_info::nonexistent
-                                          : local_info::ambiguous;
-        }
-        else if ((utcs < end) != (utcd < end))
-        {
-            r.first.begin = start;
-            r.first.end = end;
-            r.first.offset = offset_ + save_;
-            r.first.save = ceil<minutes>(save_);
-            r.first.abbrev = dst_abbrev_;
-            r.second.begin = end;
-            r.second.end = sys_seconds{(start_rule_(y+years{1}) -
-                                        offset_).time_since_epoch()};
-            r.second.abbrev = std_abbrev_;
-            r.second.offset = offset_;
-            r.result = save_ > seconds{0} ? local_info::ambiguous
-                                          : local_info::nonexistent;
-        }
-        else if (utcs < start)
-        {
-            r.first.begin = sys_seconds{(end_rule_(y-years{1}) -
-                                   (offset_ + save_)).time_since_epoch()};
-            r.first.end = start;
-            r.first.offset = offset_;
-            r.first.abbrev = std_abbrev_;
-        }
-        else if (utcs < end)
-        {
-            r.first.begin = start;
-            r.first.end = end;
-            r.first.offset = offset_ + save_;
-            r.first.save = ceil<minutes>(save_);
-            r.first.abbrev = dst_abbrev_;
-        }
-        else
-        {
-            r.first.begin = end;
-            r.first.end = sys_seconds{(start_rule_(y+years{1}) -
-                                       offset_).time_since_epoch()};
-            r.first.abbrev = std_abbrev_;
-            r.first.offset = offset_;
-        }
-    }
-    else  //  constant offset
-    {
-        r.first.begin = sys_days{year::min()/jan/1};
-        r.first.end   = sys_days{year::max()/dec/last};
-        r.first.abbrev = std_abbrev_;
-        r.first.offset = offset_;
-    }
-    return r;
-}
-
-template <class Duration>
-date::sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-time_zone::to_sys(date::local_time<Duration> tp) const
-{
-    using namespace date;
-    auto i = get_info(tp);
-    if (i.result == local_info::nonexistent)
-        throw nonexistent_local_time(tp, i);
-    else if (i.result == local_info::ambiguous)
-        throw ambiguous_local_time(tp, i);
-    return sys_time<Duration>{tp.time_since_epoch()} - i.first.offset;
-}
-
-template <class Duration>
-date::sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-time_zone::to_sys(date::local_time<Duration> tp, date::choose z) const
-{
-    using namespace date;
-    auto i = get_info(tp);
-    if (i.result == local_info::nonexistent)
-    {
-        return i.first.end;
-    }
-    else if (i.result == local_info::ambiguous)
-    {
-        if (z == choose::latest)
-            return sys_time<Duration>{tp.time_since_epoch()} - i.second.offset;
-    }
-    return sys_time<Duration>{tp.time_since_epoch()} - i.first.offset;
-}
-
-template <class Duration>
-date::local_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-time_zone::to_local(date::sys_time<Duration> tp) const
-{
-    using namespace date;
-    using namespace std::chrono;
-    using LT = local_time<typename std::common_type<Duration, seconds>::type>;
-    auto i = get_info(tp);
-    return LT{(tp + i.offset).time_since_epoch()};
-}
-
-inline
-std::ostream&
-operator<<(std::ostream& os, const time_zone& z)
-{
-    using date::operator<<;
-    os << '{';
-    os << z.std_abbrev_ << ", " << z.dst_abbrev_ << date::format(", %T, ", z.offset_)
-       << date::format("%T, [", z.save_) << z.start_rule_ << ", " << z.end_rule_ << ")}";
-    return os;
-}
-
-namespace detail
-{
-
-inline
-void
-throw_invalid(const string_t& s, unsigned i, const string_t& message)
-{
-    throw std::runtime_error(std::string("Invalid time_zone initializer.\n") +
-                             std::string(message) + ":\n" +
-                             s + '\n' +
-                             "\x1b[1;32m" +
-                             std::string(i, '~') + '^' +
-                             std::string(s.size()-i-1, '~') +
-                             "\x1b[0m");
-}
-
-inline
-unsigned
-read_date(const string_t& s, unsigned i, rule& r)
-{
-    using namespace date;
-    if (i == s.size())
-        throw_invalid(s, i, "Expected rule but found end of string");
-    if (s[i] == 'J')
-    {
-        ++i;
-        unsigned n;
-        i = read_unsigned(s, i, 3, n);
-        r.mode_ = rule::J;
-        r.n_ = n;
-    }
-    else if (s[i] == 'M')
-    {
-        ++i;
-        unsigned m;
-        i = read_unsigned(s, i, 2, m);
-        if (i == s.size() || s[i] != '.')
-            throw_invalid(s, i, "Expected '.' after month");
-        ++i;
-        unsigned n;
-        i = read_unsigned(s, i, 1, n);
-        if (i == s.size() || s[i] != '.')
-            throw_invalid(s, i, "Expected '.' after weekday index");
-        ++i;
-        unsigned wd;
-        i = read_unsigned(s, i, 1, wd);
-        r.mode_ = rule::M;
-        r.m_ = month{m};
-        r.wd_ = weekday{wd};
-        r.n_ = n;
-    }
-    else if (std::isdigit(s[i]))
-    {
-        unsigned n;
-        i = read_unsigned(s, i, 3, n);
-        r.mode_ = rule::N;
-        r.n_ = n;
-    }
-    else
-        throw_invalid(s, i, "Expected 'J', 'M', or a digit to start rule");
-    if (i != s.size() && s[i] == '/')
-    {
-        ++i;
-        std::chrono::seconds t;
-        i = read_unsigned_time(s, i, t);
-        r.time_ = t;
-    }
-    return i;
-}
-
-inline
-unsigned
-read_name(const string_t& s, unsigned i, std::string& name)
-{
-    if (i == s.size())
-        throw_invalid(s, i, "Expected a name but found end of string");
-    if (s[i] == '<')
-    {
-        ++i;
-        while (true)
-        {
-            if (i == s.size())
-                throw_invalid(s, i,
-                              "Expected to find closing '>', but found end of string");
-            if (s[i] == '>')
-                break;
-            name.push_back(s[i]);
-            ++i;
-        }
-        ++i;
-    }
-    else
-    {
-        while (i != s.size() && std::isalpha(s[i]))
-        {
-            name.push_back(s[i]);
-            ++i;
-        }
-    }
-    if (name.size() < 3)
-        throw_invalid(s, i, "Found name to be shorter than 3 characters");
-    return i;
-}
-
-inline
-unsigned
-read_signed_time(const string_t& s, unsigned i,
-                                  std::chrono::seconds& t)
-{
-    if (i == s.size())
-        throw_invalid(s, i, "Expected to read signed time, but found end of string");
-    bool negative = false;
-    if (s[i] == '-')
-    {
-        negative = true;
-        ++i;
-    }
-    else if (s[i] == '+')
-        ++i;
-    i = read_unsigned_time(s, i, t);
-    if (negative)
-        t = -t;
-    return i;
-}
-
-inline
-unsigned
-read_unsigned_time(const string_t& s, unsigned i, std::chrono::seconds& t)
-{
-    using namespace std::chrono;
-    if (i == s.size())
-        throw_invalid(s, i, "Expected to read unsigned time, but found end of string");
-    unsigned x;
-    i = read_unsigned(s, i, 2, x);
-    t = hours{x};
-    if (i != s.size() && s[i] == ':')
-    {
-        ++i;
-        i = read_unsigned(s, i, 2, x);
-        t += minutes{x};
-        if (i != s.size() && s[i] == ':')
-        {
-            ++i;
-            i = read_unsigned(s, i, 2, x);
-            t += seconds{x};
-        }
-    }
-    return i;
-}
-
-inline
-unsigned
-read_unsigned(const string_t& s, unsigned i, unsigned limit, unsigned& u)
-{
-    if (i == s.size() || !std::isdigit(s[i]))
-        throw_invalid(s, i, "Expected to find a decimal digit");
-    u = static_cast<unsigned>(s[i] - '0');
-    unsigned count = 1;
-    for (++i; count < limit && i != s.size() && std::isdigit(s[i]); ++i, ++count)
-        u = u * 10 + static_cast<unsigned>(s[i] - '0');
-    return i;
-}
-
-}  // namespace detail
-
-}  // namespace Posix
-
-namespace date
-{
-
-template <>
-struct zoned_traits<Posix::time_zone>
-{
-
-#if HAS_STRING_VIEW
-
-    static
-    Posix::time_zone
-    locate_zone(std::string_view name)
-    {
-        return Posix::time_zone{name};
-    }
-
-#else  // !HAS_STRING_VIEW
-
-    static
-    Posix::time_zone
-    locate_zone(const std::string& name)
-    {
-        return Posix::time_zone{name};
-    }
-
-    static
-    Posix::time_zone
-    locate_zone(const char* name)
-    {
-        return Posix::time_zone{name};
-    }
-
-#endif  // !HAS_STRING_VIEW
-
-};
-
-}  // namespace date
-
-#endif  // PTZ_H
diff --git a/thirdparty/date/include/date/tz.h b/thirdparty/date/include/date/tz.h
deleted file mode 100644
index 9840e7b..0000000
--- a/thirdparty/date/include/date/tz.h
+++ /dev/null
@@ -1,2575 +0,0 @@
-#ifndef TZ_H
-#define TZ_H
-
-// The MIT License (MIT)
-//
-// Copyright (c) 2015, 2016, 2017 Howard Hinnant
-// Copyright (c) 2017 Jiangang Zhuang
-// Copyright (c) 2017 Aaron Bishop
-// Copyright (c) 2017 Tomasz Kamiński
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-// Our apologies.  When the previous paragraph was written, lowercase had not yet
-// been invented (that would involve another several millennia of evolution).
-// We did not mean to shout.
-
-// Get more recent database at http://www.iana.org/time-zones
-
-// The notion of "current timezone" is something the operating system is expected to "just
-// know". How it knows this is system specific. It's often a value set by the user at OS
-// installation time and recorded by the OS somewhere. On Linux and Mac systems the current
-// timezone name is obtained by looking at the name or contents of a particular file on
-// disk. On Windows the current timezone name comes from the registry. In either method,
-// there is no guarantee that the "native" current timezone name obtained will match any
-// of the "Standard" names in this library's "database". On Linux, the names usually do
-// seem to match so mapping functions to map from native to "Standard" are typically not
-// required. On Windows, the names are never "Standard" so mapping is always required.
-// Technically any OS may use the mapping process but currently only Windows does use it.
-
-#ifndef USE_OS_TZDB
-#  define USE_OS_TZDB 0
-#endif
-
-#ifndef HAS_REMOTE_API
-#  if USE_OS_TZDB == 0
-#    ifdef _WIN32
-#      define HAS_REMOTE_API 0
-#    else
-#      define HAS_REMOTE_API 1
-#    endif
-#  else  // HAS_REMOTE_API makes no since when using the OS timezone database
-#    define HAS_REMOTE_API 0
-#  endif
-#endif
-
-#ifdef __clang__
-# pragma clang diagnostic push
-# pragma clang diagnostic ignored "-Wconstant-logical-operand"
-#endif
-
-static_assert(!(USE_OS_TZDB && HAS_REMOTE_API),
-              "USE_OS_TZDB and HAS_REMOTE_API can not be used together");
-
-#ifdef __clang__
-# pragma clang diagnostic pop
-#endif
-
-#ifndef AUTO_DOWNLOAD
-#  define AUTO_DOWNLOAD HAS_REMOTE_API
-#endif
-
-static_assert(HAS_REMOTE_API == 0 ? AUTO_DOWNLOAD == 0 : true,
-              "AUTO_DOWNLOAD can not be turned on without HAS_REMOTE_API");
-
-#ifndef USE_SHELL_API
-#  define USE_SHELL_API 1
-#endif
-
-#if USE_OS_TZDB
-#  ifdef _WIN32
-#    error "USE_OS_TZDB can not be used on Windows"
-#  endif
-#  ifndef MISSING_LEAP_SECONDS
-#    ifdef __APPLE__
-#      define MISSING_LEAP_SECONDS 1
-#    else
-#      define MISSING_LEAP_SECONDS 0
-#    endif
-#  endif
-#else
-#  define MISSING_LEAP_SECONDS 0
-#endif
-
-#ifndef HAS_DEDUCTION_GUIDES
-#  if __cplusplus >= 201703
-#    define HAS_DEDUCTION_GUIDES 1
-#  else
-#    define HAS_DEDUCTION_GUIDES 0
-#  endif
-#endif  // HAS_DEDUCTION_GUIDES
-
-#include "date.h"
-
-#if defined(_MSC_VER) && (_MSC_VER < 1900)
-#include "tz_private.h"
-#endif
-
-#include <algorithm>
-#include <atomic>
-#include <cassert>
-#include <chrono>
-#include <istream>
-#include <locale>
-#include <memory>
-#include <mutex>
-#include <ostream>
-#include <sstream>
-#include <stdexcept>
-#include <string>
-#include <type_traits>
-#include <utility>
-#include <vector>
-
-#ifdef _WIN32
-#  ifdef DATE_BUILD_DLL
-#    define DATE_API __declspec(dllexport)
-#  elif defined(DATE_USE_DLL)
-#    define DATE_API __declspec(dllimport)
-#  else
-#    define DATE_API
-#  endif
-#else
-#  ifdef DATE_BUILD_DLL
-#    define DATE_API __attribute__ ((visibility ("default")))
-#  else
-#    define DATE_API
-#  endif
-#endif
-
-namespace date
-{
-
-enum class choose {earliest, latest};
-
-namespace detail
-{
-    struct undocumented;
-}
-
-struct sys_info
-{
-    sys_seconds          begin;
-    sys_seconds          end;
-    std::chrono::seconds offset;
-    std::chrono::minutes save;
-    std::string          abbrev;
-};
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const sys_info& r)
-{
-    os << r.begin << '\n';
-    os << r.end << '\n';
-    os << make_time(r.offset) << "\n";
-    os << make_time(r.save) << "\n";
-    os << r.abbrev << '\n';
-    return os;
-}
-
-struct local_info
-{
-    enum {unique, nonexistent, ambiguous} result;
-    sys_info first;
-    sys_info second;
-};
-
-template<class CharT, class Traits>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const local_info& r)
-{
-    if (r.result == local_info::nonexistent)
-        os << "nonexistent between\n";
-    else if (r.result == local_info::ambiguous)
-        os << "ambiguous between\n";
-    os << r.first;
-    if (r.result != local_info::unique)
-    {
-        os << "and\n";
-        os << r.second;
-    }
-    return os;
-}
-
-class nonexistent_local_time
-    : public std::runtime_error
-{
-public:
-    template <class Duration>
-        nonexistent_local_time(local_time<Duration> tp, const local_info& i);
-
-private:
-    template <class Duration>
-    static
-    std::string
-    make_msg(local_time<Duration> tp, const local_info& i);
-};
-
-template <class Duration>
-inline
-nonexistent_local_time::nonexistent_local_time(local_time<Duration> tp,
-                                               const local_info& i)
-    : std::runtime_error(make_msg(tp, i))
-{
-}
-
-template <class Duration>
-std::string
-nonexistent_local_time::make_msg(local_time<Duration> tp, const local_info& i)
-{
-    assert(i.result == local_info::nonexistent);
-    std::ostringstream os;
-    os << tp << " is in a gap between\n"
-       << local_seconds{i.first.end.time_since_epoch()} + i.first.offset << ' '
-       << i.first.abbrev << " and\n"
-       << local_seconds{i.second.begin.time_since_epoch()} + i.second.offset << ' '
-       << i.second.abbrev
-       << " which are both equivalent to\n"
-       << i.first.end << " UTC";
-    return os.str();
-}
-
-class ambiguous_local_time
-    : public std::runtime_error
-{
-public:
-    template <class Duration>
-        ambiguous_local_time(local_time<Duration> tp, const local_info& i);
-
-private:
-    template <class Duration>
-    static
-    std::string
-    make_msg(local_time<Duration> tp, const local_info& i);
-};
-
-template <class Duration>
-inline
-ambiguous_local_time::ambiguous_local_time(local_time<Duration> tp, const local_info& i)
-    : std::runtime_error(make_msg(tp, i))
-{
-}
-
-template <class Duration>
-std::string
-ambiguous_local_time::make_msg(local_time<Duration> tp, const local_info& i)
-{
-    assert(i.result == local_info::ambiguous);
-    std::ostringstream os;
-    os << tp << " is ambiguous.  It could be\n"
-       << tp << ' ' << i.first.abbrev << " == "
-       << tp - i.first.offset << " UTC or\n"
-       << tp << ' ' << i.second.abbrev  << " == "
-       << tp - i.second.offset  << " UTC";
-    return os.str();
-}
-
-class time_zone;
-
-#if HAS_STRING_VIEW
-DATE_API const time_zone* locate_zone(std::string_view tz_name);
-#else
-DATE_API const time_zone* locate_zone(const std::string& tz_name);
-#endif
-
-DATE_API const time_zone* current_zone();
-
-template <class T>
-struct zoned_traits
-{
-};
-
-template <>
-struct zoned_traits<const time_zone*>
-{
-    static
-    const time_zone*
-    default_zone()
-    {
-        return date::locate_zone("Etc/UTC");
-    }
-
-#if HAS_STRING_VIEW
-
-    static
-    const time_zone*
-    locate_zone(std::string_view name)
-    {
-        return date::locate_zone(name);
-    }
-
-#else  // !HAS_STRING_VIEW
-
-    static
-    const time_zone*
-    locate_zone(const std::string& name)
-    {
-        return date::locate_zone(name);
-    }
-
-    static
-    const time_zone*
-    locate_zone(const char* name)
-    {
-        return date::locate_zone(name);
-    }
-
-#endif  // !HAS_STRING_VIEW
-};
-
-template <class Duration, class TimeZonePtr>
-class zoned_time;
-
-template <class Duration1, class Duration2, class TimeZonePtr>
-bool
-operator==(const zoned_time<Duration1, TimeZonePtr>& x,
-           const zoned_time<Duration2, TimeZonePtr>& y);
-
-template <class Duration, class TimeZonePtr = const time_zone*>
-class zoned_time
-{
-public:
-    using duration = typename std::common_type<Duration, std::chrono::seconds>::type;
-
-private:
-    TimeZonePtr        zone_;
-    sys_time<duration> tp_;
-
-public:
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = decltype(zoned_traits<T>::default_zone())>
-#endif
-        zoned_time();
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = decltype(zoned_traits<T>::default_zone())>
-#endif
-        zoned_time(const sys_time<Duration>& st);
-    explicit zoned_time(TimeZonePtr z);
-
-#if HAS_STRING_VIEW
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string_view()))
-                  >::value
-              >::type>
-        explicit zoned_time(std::string_view name);
-#else
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string()))
-                  >::value
-              >::type>
-#endif
-        explicit zoned_time(const std::string& name);
-#endif
-
-    template <class Duration2,
-              class = typename std::enable_if
-                      <
-                          std::is_convertible<sys_time<Duration2>,
-                                              sys_time<Duration>>::value
-                      >::type>
-        zoned_time(const zoned_time<Duration2, TimeZonePtr>& zt) NOEXCEPT;
-
-    zoned_time(TimeZonePtr z, const sys_time<Duration>& st);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_convertible
-                  <
-                      decltype(std::declval<T&>()->to_sys(local_time<Duration>{})),
-                      sys_time<duration>
-                  >::value
-              >::type>
-#endif
-        zoned_time(TimeZonePtr z, const local_time<Duration>& tp);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_convertible
-                  <
-                      decltype(std::declval<T&>()->to_sys(local_time<Duration>{},
-                                                          choose::earliest)),
-                      sys_time<duration>
-                  >::value
-              >::type>
-#endif
-        zoned_time(TimeZonePtr z, const local_time<Duration>& tp, choose c);
-
-    template <class Duration2, class TimeZonePtr2,
-              class = typename std::enable_if
-                      <
-                          std::is_convertible<sys_time<Duration2>,
-                                              sys_time<Duration>>::value
-                      >::type>
-        zoned_time(TimeZonePtr z, const zoned_time<Duration2, TimeZonePtr2>& zt);
-
-    template <class Duration2, class TimeZonePtr2,
-              class = typename std::enable_if
-                      <
-                          std::is_convertible<sys_time<Duration2>,
-                                              sys_time<Duration>>::value
-                      >::type>
-        zoned_time(TimeZonePtr z, const zoned_time<Duration2, TimeZonePtr2>& zt, choose);
-
-#if HAS_STRING_VIEW
-
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string_view())),
-                      sys_time<Duration>
-                  >::value
-              >::type>
-        zoned_time(std::string_view name, const sys_time<Duration>& st);
-
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string_view())),
-                      local_time<Duration>
-                  >::value
-              >::type>
-        zoned_time(std::string_view name, const local_time<Duration>& tp);
-
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string_view())),
-                      local_time<Duration>,
-                      choose
-                  >::value
-              >::type>
-        zoned_time(std::string_view name,   const local_time<Duration>& tp, choose c);
-
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string_view())),
-                      zoned_time
-                  >::value
-              >::type>
-        zoned_time(std::string_view name, const zoned_time& zt);
-
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string_view())),
-                      zoned_time,
-                      choose
-                  >::value
-              >::type>
-        zoned_time(std::string_view name, const zoned_time& zt, choose);
-
-#else  // !HAS_STRING_VIEW
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      sys_time<Duration>
-                  >::value
-              >::type>
-#endif
-        zoned_time(const std::string& name, const sys_time<Duration>& st);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      sys_time<Duration>
-                  >::value
-              >::type>
-#endif
-        zoned_time(const char* name, const sys_time<Duration>& st);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      local_time<Duration>
-                  >::value
-              >::type>
-#endif
-        zoned_time(const std::string& name, const local_time<Duration>& tp);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      local_time<Duration>
-                  >::value
-              >::type>
-#endif
-        zoned_time(const char* name, const local_time<Duration>& tp);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      local_time<Duration>,
-                      choose
-                  >::value
-              >::type>
-#endif
-        zoned_time(const std::string& name, const local_time<Duration>& tp, choose c);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      local_time<Duration>,
-                      choose
-                  >::value
-              >::type>
-#endif
-        zoned_time(const char* name, const local_time<Duration>& tp, choose c);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      zoned_time
-                  >::value
-              >::type>
-#endif
-        zoned_time(const std::string& name, const zoned_time& zt);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      zoned_time
-                  >::value
-              >::type>
-#endif
-        zoned_time(const char* name, const zoned_time& zt);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      zoned_time,
-                      choose
-                  >::value
-              >::type>
-#endif
-        zoned_time(const std::string& name, const zoned_time& zt, choose);
-
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-    template <class T = TimeZonePtr,
-              class = typename std::enable_if
-              <
-                  std::is_constructible
-                  <
-                      zoned_time,
-                      decltype(zoned_traits<T>::locate_zone(std::string())),
-                      zoned_time,
-                      choose
-                  >::value
-              >::type>
-#endif
-        zoned_time(const char* name, const zoned_time& zt, choose);
-
-#endif  // !HAS_STRING_VIEW
-
-    zoned_time& operator=(const sys_time<Duration>& st);
-    zoned_time& operator=(const local_time<Duration>& ut);
-
-    explicit operator sys_time<duration>() const;
-    explicit operator local_time<duration>() const;
-
-    TimeZonePtr          get_time_zone() const;
-    local_time<duration> get_local_time() const;
-    sys_time<duration>   get_sys_time() const;
-    sys_info             get_info() const;
-
-    template <class Duration1, class Duration2, class TimeZonePtr1>
-    friend
-    bool
-    operator==(const zoned_time<Duration1, TimeZonePtr1>& x,
-               const zoned_time<Duration2, TimeZonePtr1>& y);
-
-    template <class CharT, class Traits, class Duration1, class TimeZonePtr1>
-    friend
-    std::basic_ostream<CharT, Traits>&
-    operator<<(std::basic_ostream<CharT, Traits>& os,
-               const zoned_time<Duration1, TimeZonePtr1>& t);
-
-private:
-    template <class D, class T> friend class zoned_time;
-};
-
-using zoned_seconds = zoned_time<std::chrono::seconds>;
-
-#if HAS_DEDUCTION_GUIDES
-
-zoned_time()
-    -> zoned_time<std::chrono::seconds>;
-
-template <class Duration>
-zoned_time(sys_time<Duration>)
-    -> zoned_time<std::common_type_t<Duration, std::chrono::seconds>>;
-
-template <class TimeZonePtr>
-zoned_time(TimeZonePtr)
-    -> zoned_time<std::chrono::seconds, TimeZonePtr>;
-
-template <class TimeZonePtr, class Duration>
-zoned_time(TimeZonePtr, sys_time<Duration>)
-    -> zoned_time<std::common_type_t<Duration, std::chrono::seconds>, TimeZonePtr>;
-
-template <class TimeZonePtr, class Duration>
-zoned_time(TimeZonePtr, local_time<Duration>, choose = choose::earliest)
-    -> zoned_time<std::common_type_t<Duration, std::chrono::seconds>, TimeZonePtr>;
-
-#if HAS_STRING_VIEW
-
-zoned_time(std::string_view)
-    -> zoned_time<std::chrono::seconds>;
-
-template <class Duration>
-zoned_time(std::string_view, sys_time<Duration>)
-    -> zoned_time<std::common_type_t<Duration, std::chrono::seconds>>;
-
-template <class Duration>
-zoned_time(std::string_view, local_time<Duration>, choose = choose::earliest)
-    -> zoned_time<std::common_type_t<Duration, std::chrono::seconds>>;
-
-#else  // !HAS_STRING_VIEW
-
-zoned_time(std::string)
-    -> zoned_time<std::chrono::seconds>;
-
-template <class Duration>
-zoned_time(std::string, sys_time<Duration>)
-    -> zoned_time<std::common_type_t<Duration, std::chrono::seconds>>;
-
-template <class Duration>
-zoned_time(std::string, local_time<Duration>, choose = choose::earliest)
-    -> zoned_time<std::common_type_t<Duration, std::chrono::seconds>>;
-
-#endif  // !HAS_STRING_VIEW
-
-template <class Duration>
-zoned_time(const char*, sys_time<Duration>)
-    -> zoned_time<std::common_type_t<Duration, std::chrono::seconds>>;
-
-template <class Duration>
-zoned_time(const char*, local_time<Duration>, choose = choose::earliest)
-    -> zoned_time<std::common_type_t<Duration, std::chrono::seconds>>;
-
-template <class Duration, class TimeZonePtr, class TimeZonePtr2>
-zoned_time(TimeZonePtr, zoned_time<Duration, TimeZonePtr2>, choose = choose::earliest)
-    -> zoned_time<Duration, TimeZonePtr>;
-
-#endif  // HAS_DEDUCTION_GUIDES
-
-template <class Duration1, class Duration2, class TimeZonePtr>
-inline
-bool
-operator==(const zoned_time<Duration1, TimeZonePtr>& x,
-           const zoned_time<Duration2, TimeZonePtr>& y)
-{
-    return x.zone_ == y.zone_ && x.tp_ == y.tp_;
-}
-
-template <class Duration1, class Duration2, class TimeZonePtr>
-inline
-bool
-operator!=(const zoned_time<Duration1, TimeZonePtr>& x,
-           const zoned_time<Duration2, TimeZonePtr>& y)
-{
-    return !(x == y);
-}
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-namespace detail
-{
-#  if USE_OS_TZDB
-    struct transition;
-    struct expanded_ttinfo;
-#  else  // !USE_OS_TZDB
-    struct zonelet;
-    class Rule;
-#  endif  // !USE_OS_TZDB
-}
-
-#endif  // !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-class time_zone
-{
-private:
-    std::string                          name_;
-#if USE_OS_TZDB
-    std::vector<detail::transition>      transitions_;
-    std::vector<detail::expanded_ttinfo> ttinfos_;
-#else  // !USE_OS_TZDB
-    std::vector<detail::zonelet>         zonelets_;
-#endif  // !USE_OS_TZDB
-    std::unique_ptr<std::once_flag>      adjusted_;
-
-public:
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-    time_zone(time_zone&&) = default;
-    time_zone& operator=(time_zone&&) = default;
-#else   // defined(_MSC_VER) && (_MSC_VER < 1900)
-    time_zone(time_zone&& src);
-    time_zone& operator=(time_zone&& src);
-#endif  // defined(_MSC_VER) && (_MSC_VER < 1900)
-
-    DATE_API explicit time_zone(const std::string& s, detail::undocumented);
-
-    const std::string& name() const NOEXCEPT;
-
-    template <class Duration> sys_info   get_info(sys_time<Duration> st) const;
-    template <class Duration> local_info get_info(local_time<Duration> tp) const;
-
-    template <class Duration>
-        sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-        to_sys(local_time<Duration> tp) const;
-
-    template <class Duration>
-        sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-        to_sys(local_time<Duration> tp, choose z) const;
-
-    template <class Duration>
-        local_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-        to_local(sys_time<Duration> tp) const;
-
-    friend bool operator==(const time_zone& x, const time_zone& y) NOEXCEPT;
-    friend bool operator< (const time_zone& x, const time_zone& y) NOEXCEPT;
-    friend DATE_API std::ostream& operator<<(std::ostream& os, const time_zone& z);
-
-#if !USE_OS_TZDB
-    DATE_API void add(const std::string& s);
-#endif  // !USE_OS_TZDB
-
-private:
-    DATE_API sys_info   get_info_impl(sys_seconds tp) const;
-    DATE_API local_info get_info_impl(local_seconds tp) const;
-
-    template <class Duration>
-        sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-        to_sys_impl(local_time<Duration> tp, choose z, std::false_type) const;
-    template <class Duration>
-        sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-        to_sys_impl(local_time<Duration> tp, choose, std::true_type) const;
-
-#if USE_OS_TZDB
-    DATE_API void init() const;
-    DATE_API void init_impl();
-    DATE_API sys_info
-        load_sys_info(std::vector<detail::transition>::const_iterator i) const;
-
-    template <class TimeType>
-    DATE_API void
-    load_data(std::istream& inf, std::int32_t tzh_leapcnt, std::int32_t tzh_timecnt,
-                                 std::int32_t tzh_typecnt, std::int32_t tzh_charcnt);
-#else  // !USE_OS_TZDB
-    DATE_API sys_info   get_info_impl(sys_seconds tp, int timezone) const;
-    DATE_API void adjust_infos(const std::vector<detail::Rule>& rules);
-    DATE_API void parse_info(std::istream& in);
-#endif  // !USE_OS_TZDB
-};
-
-#if defined(_MSC_VER) && (_MSC_VER < 1900)
-
-inline
-time_zone::time_zone(time_zone&& src)
-    : name_(std::move(src.name_))
-    , zonelets_(std::move(src.zonelets_))
-    , adjusted_(std::move(src.adjusted_))
-    {}
-
-inline
-time_zone&
-time_zone::operator=(time_zone&& src)
-{
-    name_ = std::move(src.name_);
-    zonelets_ = std::move(src.zonelets_);
-    adjusted_ = std::move(src.adjusted_);
-    return *this;
-}
-
-#endif  // defined(_MSC_VER) && (_MSC_VER < 1900)
-
-inline
-const std::string&
-time_zone::name() const NOEXCEPT
-{
-    return name_;
-}
-
-template <class Duration>
-inline
-sys_info
-time_zone::get_info(sys_time<Duration> st) const
-{
-    using namespace std::chrono;
-    return get_info_impl(date::floor<seconds>(st));
-}
-
-template <class Duration>
-inline
-local_info
-time_zone::get_info(local_time<Duration> tp) const
-{
-    using namespace std::chrono;
-    return get_info_impl(date::floor<seconds>(tp));
-}
-
-template <class Duration>
-inline
-sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-time_zone::to_sys(local_time<Duration> tp) const
-{
-    return to_sys_impl(tp, choose{}, std::true_type{});
-}
-
-template <class Duration>
-inline
-sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-time_zone::to_sys(local_time<Duration> tp, choose z) const
-{
-    return to_sys_impl(tp, z, std::false_type{});
-}
-
-template <class Duration>
-inline
-local_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-time_zone::to_local(sys_time<Duration> tp) const
-{
-    using LT = local_time<typename std::common_type<Duration, std::chrono::seconds>::type>;
-    auto i = get_info(tp);
-    return LT{(tp + i.offset).time_since_epoch()};
-}
-
-inline bool operator==(const time_zone& x, const time_zone& y) NOEXCEPT {return x.name_ == y.name_;}
-inline bool operator< (const time_zone& x, const time_zone& y) NOEXCEPT {return x.name_ < y.name_;}
-
-inline bool operator!=(const time_zone& x, const time_zone& y) NOEXCEPT {return !(x == y);}
-inline bool operator> (const time_zone& x, const time_zone& y) NOEXCEPT {return   y < x;}
-inline bool operator<=(const time_zone& x, const time_zone& y) NOEXCEPT {return !(y < x);}
-inline bool operator>=(const time_zone& x, const time_zone& y) NOEXCEPT {return !(x < y);}
-
-template <class Duration>
-sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-time_zone::to_sys_impl(local_time<Duration> tp, choose z, std::false_type) const
-{
-    using namespace date;
-    using namespace std::chrono;
-    auto i = get_info(tp);
-    if (i.result == local_info::nonexistent)
-    {
-        return i.first.end;
-    }
-    else if (i.result == local_info::ambiguous)
-    {
-        if (z == choose::latest)
-            return sys_time<Duration>{tp.time_since_epoch()} - i.second.offset;
-    }
-    return sys_time<Duration>{tp.time_since_epoch()} - i.first.offset;
-}
-
-template <class Duration>
-sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-time_zone::to_sys_impl(local_time<Duration> tp, choose, std::true_type) const
-{
-    using namespace date;
-    using namespace std::chrono;
-    auto i = get_info(tp);
-    if (i.result == local_info::nonexistent)
-        throw nonexistent_local_time(tp, i);
-    else if (i.result == local_info::ambiguous)
-        throw ambiguous_local_time(tp, i);
-    return sys_time<Duration>{tp.time_since_epoch()} - i.first.offset;
-}
-
-#if !USE_OS_TZDB
-
-class link
-{
-private:
-    std::string name_;
-    std::string target_;
-public:
-    DATE_API explicit link(const std::string& s);
-
-    const std::string& name() const {return name_;}
-    const std::string& target() const {return target_;}
-
-    friend bool operator==(const link& x, const link& y) {return x.name_ == y.name_;}
-    friend bool operator< (const link& x, const link& y) {return x.name_ < y.name_;}
-
-    friend DATE_API std::ostream& operator<<(std::ostream& os, const link& x);
-};
-
-inline bool operator!=(const link& x, const link& y) {return !(x == y);}
-inline bool operator> (const link& x, const link& y) {return   y < x;}
-inline bool operator<=(const link& x, const link& y) {return !(y < x);}
-inline bool operator>=(const link& x, const link& y) {return !(x < y);}
-
-#endif  // !USE_OS_TZDB
-
-#if !MISSING_LEAP_SECONDS
-
-class leap
-{
-private:
-    sys_seconds date_;
-
-public:
-#if USE_OS_TZDB
-    DATE_API explicit leap(const sys_seconds& s, detail::undocumented);
-#else
-    DATE_API explicit leap(const std::string& s, detail::undocumented);
-#endif
-
-    sys_seconds date() const {return date_;}
-
-    friend bool operator==(const leap& x, const leap& y) {return x.date_ == y.date_;}
-    friend bool operator< (const leap& x, const leap& y) {return x.date_ < y.date_;}
-
-    template <class Duration>
-    friend
-    bool
-    operator==(const leap& x, const sys_time<Duration>& y)
-    {
-        return x.date_ == y;
-    }
-
-    template <class Duration>
-    friend
-    bool
-    operator< (const leap& x, const sys_time<Duration>& y)
-    {
-        return x.date_ < y;
-    }
-
-    template <class Duration>
-    friend
-    bool
-    operator< (const sys_time<Duration>& x, const leap& y)
-    {
-        return x < y.date_;
-    }
-
-    friend DATE_API std::ostream& operator<<(std::ostream& os, const leap& x);
-};
-
-inline bool operator!=(const leap& x, const leap& y) {return !(x == y);}
-inline bool operator> (const leap& x, const leap& y) {return   y < x;}
-inline bool operator<=(const leap& x, const leap& y) {return !(y < x);}
-inline bool operator>=(const leap& x, const leap& y) {return !(x < y);}
-
-template <class Duration>
-inline
-bool
-operator==(const sys_time<Duration>& x, const leap& y)
-{
-    return y == x;
-}
-
-template <class Duration>
-inline
-bool
-operator!=(const leap& x, const sys_time<Duration>& y)
-{
-    return !(x == y);
-}
-
-template <class Duration>
-inline
-bool
-operator!=(const sys_time<Duration>& x, const leap& y)
-{
-    return !(x == y);
-}
-
-template <class Duration>
-inline
-bool
-operator> (const leap& x, const sys_time<Duration>& y)
-{
-    return y < x;
-}
-
-template <class Duration>
-inline
-bool
-operator> (const sys_time<Duration>& x, const leap& y)
-{
-    return y < x;
-}
-
-template <class Duration>
-inline
-bool
-operator<=(const leap& x, const sys_time<Duration>& y)
-{
-    return !(y < x);
-}
-
-template <class Duration>
-inline
-bool
-operator<=(const sys_time<Duration>& x, const leap& y)
-{
-    return !(y < x);
-}
-
-template <class Duration>
-inline
-bool
-operator>=(const leap& x, const sys_time<Duration>& y)
-{
-    return !(x < y);
-}
-
-template <class Duration>
-inline
-bool
-operator>=(const sys_time<Duration>& x, const leap& y)
-{
-    return !(x < y);
-}
-
-#endif  // !MISSING_LEAP_SECONDS
-
-#ifdef _WIN32
-
-namespace detail
-{
-
-// The time zone mapping is modelled after this data file:
-// http://unicode.org/repos/cldr/trunk/common/supplemental/windowsZones.xml
-// and the field names match the element names from the mapZone element
-// of windowsZones.xml.
-// The website displays this file here:
-// http://www.unicode.org/cldr/charts/latest/supplemental/zone_tzid.html
-// The html view is sorted before being displayed but is otherwise the same
-// There is a mapping between the os centric view (in this case windows)
-// the html displays uses and the generic view the xml file.
-// That mapping is this:
-// display column "windows" -> xml field "other".
-// display column "region"  -> xml field "territory".
-// display column "tzid"    -> xml field "type".
-// This structure uses the generic terminology because it could be
-// used to to support other os/native name conversions, not just windows,
-// and using the same generic names helps retain the connection to the
-// origin of the data that we are using.
-struct timezone_mapping
-{
-    timezone_mapping(const char* other, const char* territory, const char* type)
-        : other(other), territory(territory), type(type)
-    {
-    }
-    timezone_mapping() = default;
-    std::string other;
-    std::string territory;
-    std::string type;
-};
-
-}  // detail
-
-#endif  // _WIN32
-
-struct tzdb
-{
-    std::string               version = "unknown";
-    std::vector<time_zone>    zones;
-#if !USE_OS_TZDB
-    std::vector<link>         links;
-#endif
-#if !MISSING_LEAP_SECONDS
-    std::vector<leap>         leaps;
-#endif
-#if !USE_OS_TZDB
-    std::vector<detail::Rule> rules;
-#endif
-#ifdef _WIN32
-    std::vector<detail::timezone_mapping> mappings;
-#endif
-    tzdb* next = nullptr;
-
-    tzdb() = default;
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-    tzdb(tzdb&&) = default;
-    tzdb& operator=(tzdb&&) = default;
-#else  // defined(_MSC_VER) && (_MSC_VER < 1900)
-    tzdb(tzdb&& src)
-        : version(std::move(src.version))
-        , zones(std::move(src.zones))
-        , links(std::move(src.links))
-        , leaps(std::move(src.leaps))
-        , rules(std::move(src.rules))
-        , mappings(std::move(src.mappings))
-    {}
-
-    tzdb& operator=(tzdb&& src)
-    {
-        version = std::move(src.version);
-        zones = std::move(src.zones);
-        links = std::move(src.links);
-        leaps = std::move(src.leaps);
-        rules = std::move(src.rules);
-        mappings = std::move(src.mappings);
-        return *this;
-    }
-#endif  // defined(_MSC_VER) && (_MSC_VER < 1900)
-
-#if HAS_STRING_VIEW
-    const time_zone* locate_zone(std::string_view tz_name) const;
-#else
-    const time_zone* locate_zone(const std::string& tz_name) const;
-#endif
-    const time_zone* current_zone() const;
-};
-
-using TZ_DB = tzdb;
-
-DATE_API std::ostream&
-operator<<(std::ostream& os, const tzdb& db);
-
-DATE_API const tzdb& get_tzdb();
-
-class tzdb_list
-{
-    std::atomic<tzdb*> head_{nullptr};
-
-public:
-    ~tzdb_list();
-    tzdb_list() = default;
-    tzdb_list(tzdb_list&& x) noexcept;
-
-    const tzdb& front() const noexcept {return *head_;}
-          tzdb& front()       noexcept {return *head_;}
-
-    class const_iterator;
-
-    const_iterator begin() const noexcept;
-    const_iterator end() const noexcept;
-
-    const_iterator cbegin() const noexcept;
-    const_iterator cend() const noexcept;
-
-    const_iterator erase_after(const_iterator p) noexcept;
-
-    struct undocumented_helper;
-private:
-    void push_front(tzdb* tzdb) noexcept;
-};
-
-class tzdb_list::const_iterator
-{
-    tzdb* p_ = nullptr;
-
-    explicit const_iterator(tzdb* p) noexcept : p_{p} {}
-public:
-    const_iterator() = default;
-
-    using iterator_category = std::forward_iterator_tag;
-    using value_type        = tzdb;
-    using reference         = const value_type&;
-    using pointer           = const value_type*;
-    using difference_type   = std::ptrdiff_t;
-
-    reference operator*() const noexcept {return *p_;}
-    pointer  operator->() const noexcept {return p_;}
-
-    const_iterator& operator++() noexcept {p_ = p_->next; return *this;}
-    const_iterator  operator++(int) noexcept {auto t = *this; ++(*this); return t;}
-
-    friend
-    bool
-    operator==(const const_iterator& x, const const_iterator& y) noexcept
-        {return x.p_ == y.p_;}
-
-    friend
-    bool
-    operator!=(const const_iterator& x, const const_iterator& y) noexcept
-        {return !(x == y);}
-
-    friend class tzdb_list;
-};
-
-inline
-tzdb_list::const_iterator
-tzdb_list::begin() const noexcept
-{
-    return const_iterator{head_};
-}
-
-inline
-tzdb_list::const_iterator
-tzdb_list::end() const noexcept
-{
-    return const_iterator{nullptr};
-}
-
-inline
-tzdb_list::const_iterator
-tzdb_list::cbegin() const noexcept
-{
-    return begin();
-}
-
-inline
-tzdb_list::const_iterator
-tzdb_list::cend() const noexcept
-{
-    return end();
-}
-
-DATE_API tzdb_list& get_tzdb_list();
-
-#if !USE_OS_TZDB
-
-DATE_API const tzdb& reload_tzdb();
-DATE_API void        set_install(const std::string& install);
-
-#endif  // !USE_OS_TZDB
-
-#if HAS_REMOTE_API
-
-DATE_API std::string remote_version();
-DATE_API bool        remote_download(const std::string& version);
-DATE_API bool        remote_install(const std::string& version);
-
-#endif
-
-// zoned_time
-
-namespace detail
-{
-
-template <class T>
-inline
-T*
-to_raw_pointer(T* p) noexcept
-{
-    return p;
-}
-
-template <class Pointer>
-inline
-auto
-to_raw_pointer(Pointer p) noexcept
-    -> decltype(detail::to_raw_pointer(p.operator->()))
-{
-    return detail::to_raw_pointer(p.operator->());
-}
-
-}  // namespace detail
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time()
-    : zone_(zoned_traits<TimeZonePtr>::default_zone())
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const sys_time<Duration>& st)
-    : zone_(zoned_traits<TimeZonePtr>::default_zone())
-    , tp_(st)
-    {}
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z)
-    : zone_(std::move(z))
-    {assert(detail::to_raw_pointer(zone_) != nullptr);}
-
-#if HAS_STRING_VIEW
-
-template <class Duration, class TimeZonePtr>
-template <class, class>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name))
-    {}
-
-#else  // !HAS_STRING_VIEW
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name))
-    {}
-
-#endif  // !HAS_STRING_VIEW
-
-template <class Duration, class TimeZonePtr>
-template <class Duration2, class>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const zoned_time<Duration2, TimeZonePtr>& zt) NOEXCEPT
-    : zone_(zt.zone_)
-    , tp_(zt.tp_)
-    {}
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z, const sys_time<Duration>& st)
-    : zone_(std::move(z))
-    , tp_(st)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z, const local_time<Duration>& t)
-    : zone_(std::move(z))
-    , tp_(zone_->to_sys(t))
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z, const local_time<Duration>& t,
-                                              choose c)
-    : zone_(std::move(z))
-    , tp_(zone_->to_sys(t, c))
-    {}
-
-template <class Duration, class TimeZonePtr>
-template <class Duration2, class TimeZonePtr2, class>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z,
-                                              const zoned_time<Duration2, TimeZonePtr2>& zt)
-    : zone_(std::move(z))
-    , tp_(zt.tp_)
-    {}
-
-template <class Duration, class TimeZonePtr>
-template <class Duration2, class TimeZonePtr2, class>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(TimeZonePtr z,
-                                      const zoned_time<Duration2, TimeZonePtr2>& zt, choose)
-    : zoned_time(std::move(z), zt)
-    {}
-
-#if HAS_STRING_VIEW
-
-template <class Duration, class TimeZonePtr>
-template <class, class>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name,
-                                              const sys_time<Duration>& st)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), st)
-    {}
-
-template <class Duration, class TimeZonePtr>
-template <class, class>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name,
-                                              const local_time<Duration>& t)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t)
-    {}
-
-template <class Duration, class TimeZonePtr>
-template <class, class>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name,
-                                              const local_time<Duration>& t, choose c)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t, c)
-    {}
-
-template <class Duration, class TimeZonePtr>
-template <class, class>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name, const zoned_time& zt)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt)
-    {}
-
-template <class Duration, class TimeZonePtr>
-template <class, class>
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(std::string_view name,
-                                              const zoned_time& zt, choose c)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt, c)
-    {}
-
-#else  // !HAS_STRING_VIEW
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
-                                              const sys_time<Duration>& st)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), st)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name,
-                                              const sys_time<Duration>& st)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), st)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
-                                              const local_time<Duration>& t)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name,
-                                              const local_time<Duration>& t)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
-                                              const local_time<Duration>& t, choose c)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t, c)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name,
-                                              const local_time<Duration>& t, choose c)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), t, c)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
-                                              const zoned_time& zt)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name, const zoned_time& zt)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const std::string& name,
-                                              const zoned_time& zt, choose c)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt, c)
-    {}
-
-template <class Duration, class TimeZonePtr>
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-template <class T, class>
-#endif
-inline
-zoned_time<Duration, TimeZonePtr>::zoned_time(const char* name,
-                                              const zoned_time& zt, choose c)
-    : zoned_time(zoned_traits<TimeZonePtr>::locate_zone(name), zt, c)
-    {}
-
-#endif  // HAS_STRING_VIEW
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>&
-zoned_time<Duration, TimeZonePtr>::operator=(const sys_time<Duration>& st)
-{
-    tp_ = st;
-    return *this;
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>&
-zoned_time<Duration, TimeZonePtr>::operator=(const local_time<Duration>& ut)
-{
-    tp_ = zone_->to_sys(ut);
-    return *this;
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>::operator local_time<typename zoned_time<Duration, TimeZonePtr>::duration>() const
-{
-    return get_local_time();
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>::operator sys_time<typename zoned_time<Duration, TimeZonePtr>::duration>() const
-{
-    return get_sys_time();
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-TimeZonePtr
-zoned_time<Duration, TimeZonePtr>::get_time_zone() const
-{
-    return zone_;
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-local_time<typename zoned_time<Duration, TimeZonePtr>::duration>
-zoned_time<Duration, TimeZonePtr>::get_local_time() const
-{
-    return zone_->to_local(tp_);
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-sys_time<typename zoned_time<Duration, TimeZonePtr>::duration>
-zoned_time<Duration, TimeZonePtr>::get_sys_time() const
-{
-    return tp_;
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-sys_info
-zoned_time<Duration, TimeZonePtr>::get_info() const
-{
-    return zone_->get_info(tp_);
-}
-
-// make_zoned_time
-
-inline
-zoned_time<std::chrono::seconds>
-make_zoned()
-{
-    return zoned_time<std::chrono::seconds>();
-}
-
-template <class Duration>
-inline
-zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-make_zoned(const sys_time<Duration>& tp)
-{
-    return zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type>(tp);
-}
-
-template <class TimeZonePtr
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-          , class = typename std::enable_if
-          <
-            std::is_class
-            <
-                typename std::decay
-                <
-                    decltype(*detail::to_raw_pointer(std::declval<TimeZonePtr&>()))
-                >::type
-            >{}
-          >::type
-#endif
-         >
-inline
-zoned_time<std::chrono::seconds, TimeZonePtr>
-make_zoned(TimeZonePtr z)
-{
-    return zoned_time<std::chrono::seconds, TimeZonePtr>(std::move(z));
-}
-
-inline
-zoned_seconds
-make_zoned(const std::string& name)
-{
-    return zoned_seconds(name);
-}
-
-template <class Duration, class TimeZonePtr
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-          , class = typename std::enable_if
-          <
-            std::is_class<typename std::decay<decltype(*std::declval<TimeZonePtr&>())>::type>{}
-          >::type
-#endif
-         >
-inline
-zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type, TimeZonePtr>
-make_zoned(TimeZonePtr zone, const local_time<Duration>& tp)
-{
-    return zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type,
-                      TimeZonePtr>(std::move(zone), tp);
-}
-
-template <class Duration, class TimeZonePtr
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-          , class = typename std::enable_if
-          <
-            std::is_class<typename std::decay<decltype(*std::declval<TimeZonePtr&>())>::type>{}
-          >::type
-#endif
-         >
-inline
-zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type, TimeZonePtr>
-make_zoned(TimeZonePtr zone, const local_time<Duration>& tp, choose c)
-{
-    return zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type,
-                      TimeZonePtr>(std::move(zone), tp, c);
-}
-
-template <class Duration>
-inline
-zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-make_zoned(const std::string& name, const local_time<Duration>& tp)
-{
-    return zoned_time<typename std::common_type<Duration,
-                      std::chrono::seconds>::type>(name, tp);
-}
-
-template <class Duration>
-inline
-zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-make_zoned(const std::string& name, const local_time<Duration>& tp, choose c)
-{
-    return zoned_time<typename std::common_type<Duration,
-                      std::chrono::seconds>::type>(name, tp, c);
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>
-make_zoned(TimeZonePtr zone, const zoned_time<Duration, TimeZonePtr>& zt)
-{
-    return zoned_time<Duration, TimeZonePtr>(std::move(zone), zt);
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>
-make_zoned(const std::string& name, const zoned_time<Duration, TimeZonePtr>& zt)
-{
-    return zoned_time<Duration, TimeZonePtr>(name, zt);
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>
-make_zoned(TimeZonePtr zone, const zoned_time<Duration, TimeZonePtr>& zt, choose c)
-{
-    return zoned_time<Duration, TimeZonePtr>(std::move(zone), zt, c);
-}
-
-template <class Duration, class TimeZonePtr>
-inline
-zoned_time<Duration, TimeZonePtr>
-make_zoned(const std::string& name, const zoned_time<Duration, TimeZonePtr>& zt, choose c)
-{
-    return zoned_time<Duration, TimeZonePtr>(name, zt, c);
-}
-
-template <class Duration, class TimeZonePtr
-#if !defined(_MSC_VER) || (_MSC_VER > 1900)
-          , class = typename std::enable_if
-          <
-            std::is_class<typename std::decay<decltype(*std::declval<TimeZonePtr&>())>::type>{}
-          >::type
-#endif
-         >
-inline
-zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type, TimeZonePtr>
-make_zoned(TimeZonePtr zone, const sys_time<Duration>& st)
-{
-    return zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type,
-                      TimeZonePtr>(std::move(zone), st);
-}
-
-template <class Duration>
-inline
-zoned_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-make_zoned(const std::string& name, const sys_time<Duration>& st)
-{
-    return zoned_time<typename std::common_type<Duration,
-                      std::chrono::seconds>::type>(name, st);
-}
-
-template <class CharT, class Traits, class Duration, class TimeZonePtr>
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const zoned_time<Duration, TimeZonePtr>& tp)
-{
-    using duration = typename zoned_time<Duration, TimeZonePtr>::duration;
-    using LT = local_time<duration>;
-    auto const tz = tp.get_time_zone();
-    auto const st = tp.get_sys_time();
-    auto const info = tz->get_info(st);
-    return to_stream(os, fmt, LT{(st+info.offset).time_since_epoch()},
-                     &info.abbrev, &info.offset);
-}
-
-template <class CharT, class Traits, class Duration, class TimeZonePtr>
-inline
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const zoned_time<Duration, TimeZonePtr>& t)
-{
-    const CharT fmt[] = {'%', 'F', ' ', '%', 'T', ' ', '%', 'Z', CharT{}};
-    return to_stream(os, fmt, t);
-}
-
-#if !MISSING_LEAP_SECONDS
-
-class utc_clock
-{
-public:
-    using duration                  = std::chrono::system_clock::duration;
-    using rep                       = duration::rep;
-    using period                    = duration::period;
-    using time_point                = std::chrono::time_point<utc_clock>;
-    static CONSTDATA bool is_steady = false;
-
-    static time_point now();
-
-    template<typename Duration>
-    static
-    std::chrono::time_point<std::chrono::system_clock, typename std::common_type<Duration, std::chrono::seconds>::type>
-    to_sys(const std::chrono::time_point<utc_clock, Duration>&);
-
-    template<typename Duration>
-    static
-    std::chrono::time_point<utc_clock, typename std::common_type<Duration, std::chrono::seconds>::type>
-    from_sys(const std::chrono::time_point<std::chrono::system_clock, Duration>&);
-};
-
-template <class Duration>
-    using utc_time = std::chrono::time_point<utc_clock, Duration>;
-
-using utc_seconds = utc_time<std::chrono::seconds>;
-
-template <class Duration>
-utc_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-utc_clock::from_sys(const sys_time<Duration>& st)
-{
-    using namespace std::chrono;
-    using duration = typename std::common_type<Duration, seconds>::type;
-    auto const& leaps = get_tzdb().leaps;
-    auto const lt = std::upper_bound(leaps.begin(), leaps.end(), st);
-    return utc_time<duration>{st.time_since_epoch() + seconds{lt-leaps.begin()}};
-}
-
-// Return pair<is_leap_second, seconds{number_of_leap_seconds_since_1970}>
-// first is true if ut is during a leap second insertion, otherwise false.
-// If ut is during a leap second insertion, that leap second is included in the count
-template <class Duration>
-std::pair<bool, std::chrono::seconds>
-is_leap_second(date::utc_time<Duration> const& ut)
-{
-    using namespace date;
-    using namespace std::chrono;
-    using duration = typename std::common_type<Duration, seconds>::type;
-    auto const& leaps = get_tzdb().leaps;
-    auto tp = sys_time<duration>{ut.time_since_epoch()};
-    auto const lt = std::upper_bound(leaps.begin(), leaps.end(), tp);
-    auto ds = seconds{lt-leaps.begin()};
-    tp -= ds;
-    auto ls = false;
-    if (lt > leaps.begin())
-    {
-        if (tp < lt[-1])
-        {
-            if (tp >= lt[-1].date() - seconds{1})
-                ls = true;
-            else
-                --ds;
-        }
-    }
-    return {ls, ds};
-}
-
-template <class Duration>
-sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-utc_clock::to_sys(const utc_time<Duration>& ut)
-{
-    using namespace std::chrono;
-    using duration = typename std::common_type<Duration, seconds>::type;
-    auto ls = is_leap_second(ut);
-    auto tp = sys_time<duration>{ut.time_since_epoch() - ls.second};
-    if (ls.first)
-        tp = floor<seconds>(tp) + seconds{1} - duration{1};
-    return tp;
-}
-
-inline
-utc_clock::time_point
-utc_clock::now()
-{
-    using namespace std::chrono;
-    return from_sys(system_clock::now());
-}
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const utc_time<Duration>& t)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = typename common_type<Duration, seconds>::type;
-    const string abbrev("UTC");
-    CONSTDATA seconds offset{0};
-    auto ls = is_leap_second(t);
-    auto tp = sys_time<CT>{t.time_since_epoch() - ls.second};
-    auto const sd = floor<days>(tp);
-    year_month_day ymd = sd;
-    auto time = make_time(tp - sys_seconds{sd});
-    time.seconds() += seconds{ls.first};
-    fields<CT> fds{ymd, time};
-    return to_stream(os, fmt, fds, &abbrev, &offset);
-}
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const utc_time<Duration>& t)
-{
-    const CharT fmt[] = {'%', 'F', ' ', '%', 'T', CharT{}};
-    return to_stream(os, fmt, t);
-}
-
-template <class Duration, class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-            utc_time<Duration>& tp, std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = typename common_type<Duration, seconds>::type;
-    minutes offset_local{};
-    auto offptr = offset ? offset : &offset_local;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offptr);
-    if (!fds.ymd.ok())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-    {
-        bool is_60_sec = fds.tod.seconds() == seconds{60};
-        if (is_60_sec)
-            fds.tod.seconds() -= seconds{1};
-        auto tmp = utc_clock::from_sys(sys_days(fds.ymd) - *offptr + fds.tod.to_duration());
-        if (is_60_sec)
-            tmp += seconds{1};
-        if (is_60_sec != is_leap_second(tmp).first || !fds.tod.in_conventional_range())
-        {
-            is.setstate(ios::failbit);
-            return is;
-        }
-        tp = time_point_cast<Duration>(tmp);
-    }
-    return is;
-}
-
-// tai_clock
-
-class tai_clock
-{
-public:
-    using duration                  = std::chrono::system_clock::duration;
-    using rep                       = duration::rep;
-    using period                    = duration::period;
-    using time_point                = std::chrono::time_point<tai_clock>;
-    static const bool is_steady     = false;
-
-    static time_point now();
-
-    template<typename Duration>
-    static
-    std::chrono::time_point<utc_clock, typename std::common_type<Duration, std::chrono::seconds>::type>
-    to_utc(const std::chrono::time_point<tai_clock, Duration>&) NOEXCEPT;
-
-    template<typename Duration>
-    static
-    std::chrono::time_point<tai_clock, typename std::common_type<Duration, std::chrono::seconds>::type>
-    from_utc(const std::chrono::time_point<utc_clock, Duration>&) NOEXCEPT;
-};
-
-template <class Duration>
-    using tai_time = std::chrono::time_point<tai_clock, Duration>;
-
-using tai_seconds = tai_time<std::chrono::seconds>;
-
-template <class Duration>
-inline
-utc_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-tai_clock::to_utc(const tai_time<Duration>& t) NOEXCEPT
-{
-    using namespace std::chrono;
-    using duration = typename std::common_type<Duration, seconds>::type;
-    return utc_time<duration>{t.time_since_epoch()} -
-            (sys_days(year{1970}/jan/1) - sys_days(year{1958}/jan/1) + seconds{10});
-}
-
-template <class Duration>
-inline
-tai_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-tai_clock::from_utc(const utc_time<Duration>& t) NOEXCEPT
-{
-    using namespace std::chrono;
-    using duration = typename std::common_type<Duration, seconds>::type;
-    return tai_time<duration>{t.time_since_epoch()} +
-            (sys_days(year{1970}/jan/1) - sys_days(year{1958}/jan/1) + seconds{10});
-}
-
-inline
-tai_clock::time_point
-tai_clock::now()
-{
-    using namespace std::chrono;
-    return from_utc(utc_clock::now());
-}
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const tai_time<Duration>& t)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = typename common_type<Duration, seconds>::type;
-    const string abbrev("TAI");
-    CONSTDATA seconds offset{0};
-    auto tp = sys_time<CT>{t.time_since_epoch()} -
-              seconds(sys_days(year{1970}/jan/1) - sys_days(year{1958}/jan/1));
-    auto const sd = floor<days>(tp);
-    year_month_day ymd = sd;
-    auto time = make_time(tp - sys_seconds{sd});
-    fields<CT> fds{ymd, time};
-    return to_stream(os, fmt, fds, &abbrev, &offset);
-}
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const tai_time<Duration>& t)
-{
-    const CharT fmt[] = {'%', 'F', ' ', '%', 'T', CharT{}};
-    return to_stream(os, fmt, t);
-}
-
-template <class Duration, class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-            tai_time<Duration>& tp,
-            std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = typename common_type<Duration, seconds>::type;
-    minutes offset_local{};
-    auto offptr = offset ? offset : &offset_local;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offptr);
-    if (!fds.ymd.ok() || !fds.tod.in_conventional_range())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        tp = tai_time<Duration>{duration_cast<Duration>(
-                (sys_days(fds.ymd) +
-                 (sys_days(year{1970}/jan/1) - sys_days(year{1958}/jan/1)) -
-                 *offptr + fds.tod.to_duration()).time_since_epoch())};
-    return is;
-}
-
-// gps_clock
-
-class gps_clock
-{
-public:
-    using duration                  = std::chrono::system_clock::duration;
-    using rep                       = duration::rep;
-    using period                    = duration::period;
-    using time_point                = std::chrono::time_point<gps_clock>;
-    static const bool is_steady     = false;
-
-    static time_point now();
-
-    template<typename Duration>
-    static
-    std::chrono::time_point<utc_clock, typename std::common_type<Duration, std::chrono::seconds>::type>
-    to_utc(const std::chrono::time_point<gps_clock, Duration>&) NOEXCEPT;
-
-    template<typename Duration>
-    static
-    std::chrono::time_point<gps_clock, typename std::common_type<Duration, std::chrono::seconds>::type>
-    from_utc(const std::chrono::time_point<utc_clock, Duration>&) NOEXCEPT;
-
-};
-
-template <class Duration>
-    using gps_time = std::chrono::time_point<gps_clock, Duration>;
-
-using gps_seconds = gps_time<std::chrono::seconds>;
-
-template <class Duration>
-inline
-utc_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-gps_clock::to_utc(const gps_time<Duration>& t) NOEXCEPT
-{
-    using namespace std::chrono;
-    using duration = typename std::common_type<Duration, seconds>::type;
-    return utc_time<duration>{t.time_since_epoch()} +
-            (sys_days(year{1980}/jan/sun[1]) - sys_days(year{1970}/jan/1) + seconds{9});
-}
-
-template <class Duration>
-inline
-gps_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-gps_clock::from_utc(const utc_time<Duration>& t) NOEXCEPT
-{
-    using namespace std::chrono;
-    using duration = typename std::common_type<Duration, seconds>::type;
-    return gps_time<duration>{t.time_since_epoch()} -
-            (sys_days(year{1980}/jan/sun[1]) - sys_days(year{1970}/jan/1) + seconds{9});
-}
-
-inline
-gps_clock::time_point
-gps_clock::now()
-{
-    using namespace std::chrono;
-    return from_utc(utc_clock::now());
-}
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-to_stream(std::basic_ostream<CharT, Traits>& os, const CharT* fmt,
-          const gps_time<Duration>& t)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = typename common_type<Duration, seconds>::type;
-    const string abbrev("GPS");
-    CONSTDATA seconds offset{0};
-    auto tp = sys_time<CT>{t.time_since_epoch()} +
-              seconds(sys_days(year{1980}/jan/sun[1]) - sys_days(year{1970}/jan/1));
-    auto const sd = floor<days>(tp);
-    year_month_day ymd = sd;
-    auto time = make_time(tp - sys_seconds{sd});
-    fields<CT> fds{ymd, time};
-    return to_stream(os, fmt, fds, &abbrev, &offset);
-}
-
-template <class CharT, class Traits, class Duration>
-std::basic_ostream<CharT, Traits>&
-operator<<(std::basic_ostream<CharT, Traits>& os, const gps_time<Duration>& t)
-{
-    const CharT fmt[] = {'%', 'F', ' ', '%', 'T', CharT{}};
-    return to_stream(os, fmt, t);
-}
-
-template <class Duration, class CharT, class Traits, class Alloc = std::allocator<CharT>>
-std::basic_istream<CharT, Traits>&
-from_stream(std::basic_istream<CharT, Traits>& is, const CharT* fmt,
-            gps_time<Duration>& tp,
-            std::basic_string<CharT, Traits, Alloc>* abbrev = nullptr,
-            std::chrono::minutes* offset = nullptr)
-{
-    using namespace std;
-    using namespace std::chrono;
-    using CT = typename common_type<Duration, seconds>::type;
-    minutes offset_local{};
-    auto offptr = offset ? offset : &offset_local;
-    fields<CT> fds{};
-    from_stream(is, fmt, fds, abbrev, offptr);
-    if (!fds.ymd.ok() || !fds.tod.in_conventional_range())
-        is.setstate(ios::failbit);
-    if (!is.fail())
-        tp = gps_time<Duration>{duration_cast<Duration>(
-                (sys_days(fds.ymd) -
-                 (sys_days(year{1980}/jan/sun[1]) - sys_days(year{1970}/jan/1)) -
-                 *offptr + fds.tod.to_duration()).time_since_epoch())};
-    return is;
-}
-
-// clock_time_conversion
-
-template <class DstClock, class SrcClock>
-struct clock_time_conversion
-{};
-
-template <>
-struct clock_time_conversion<std::chrono::system_clock, std::chrono::system_clock>
-{
-    template <class Duration>
-    sys_time<Duration>
-    operator()(const sys_time<Duration>& st) const
-    {
-        return st;
-    }
-};
-
-template <>
-struct clock_time_conversion<utc_clock, utc_clock>
-{
-    template <class Duration>
-    utc_time<Duration>
-    operator()(const utc_time<Duration>& ut) const
-    {
-        return ut;
-    }
-};
-
-template <>
-struct clock_time_conversion<utc_clock, std::chrono::system_clock>
-{
-    template <class Duration>
-    utc_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-    operator()(const sys_time<Duration>& st) const
-    {
-        return utc_clock::from_sys(st);
-    }
-};
-
-template <>
-struct clock_time_conversion<std::chrono::system_clock, utc_clock>
-{
-    template <class Duration>
-    sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-    operator()(const utc_time<Duration>& ut) const
-    {
-        return utc_clock::to_sys(ut);
-    }
-};
-
-template <class Clock>
-struct clock_time_conversion<Clock, Clock>
-{
-    template <class Duration>
-    std::chrono::time_point<Clock, Duration>
-    operator()(const std::chrono::time_point<Clock, Duration>& tp) const
-    {
-        return tp;
-    }
-};
-
-namespace ctc_detail
-{
-
-template <class Clock, class Duration>
-    using time_point = std::chrono::time_point<Clock, Duration>;
-
-using std::declval;
-using std::chrono::system_clock;
-
-//Check if TimePoint is time for given clock,
-//if not emits hard error
-template <class Clock, class TimePoint>
-struct return_clock_time
-{
-    using clock_time_point = time_point<Clock, typename TimePoint::duration>;
-    using type             = TimePoint;
-
-    static_assert(std::is_same<TimePoint, clock_time_point>::value,
-                  "time point with appropariate clock shall be returned");
-};
-
-// Check if Clock has to_sys method accepting TimePoint with given duration const& and
-// returning sys_time. If so has nested type member equal to return type to_sys.
-template <class Clock, class Duration, class = void>
-struct return_to_sys
-{};
-
-template <class Clock, class Duration>
-struct return_to_sys
-       <
-           Clock, Duration,
-           decltype(Clock::to_sys(declval<time_point<Clock, Duration> const&>()), void())
-       >
-    : return_clock_time
-      <
-          system_clock,
-          decltype(Clock::to_sys(declval<time_point<Clock, Duration> const&>()))
-      >
-{};
-
-// Similiar to above
-template <class Clock, class Duration, class = void>
-struct return_from_sys
-{};
-
-template <class Clock, class Duration>
-struct return_from_sys
-       <
-           Clock, Duration,
-           decltype(Clock::from_sys(declval<time_point<system_clock, Duration> const&>()),
-                    void())
-       >
-    : return_clock_time
-      <
-          Clock,
-          decltype(Clock::from_sys(declval<time_point<system_clock, Duration> const&>()))
-      >
-{};
-
-// Similiar to above
-template <class Clock, class Duration, class = void>
-struct return_to_utc
-{};
-
-template <class Clock, class Duration>
-struct return_to_utc
-       <
-           Clock, Duration,
-           decltype(Clock::to_utc(declval<time_point<Clock, Duration> const&>()), void())
-       >
-    : return_clock_time
-      <
-          utc_clock,
-          decltype(Clock::to_utc(declval<time_point<Clock, Duration> const&>()))>
-{};
-
-// Similiar to above
-template <class Clock, class Duration, class = void>
-struct return_from_utc
-{};
-
-template <class Clock, class Duration>
-struct return_from_utc
-       <
-           Clock, Duration,
-           decltype(Clock::from_utc(declval<time_point<utc_clock, Duration> const&>()),
-                    void())
-       >
-    : return_clock_time
-      <
-          Clock,
-          decltype(Clock::from_utc(declval<time_point<utc_clock, Duration> const&>()))
-      >
-{};
-
-}  // namespace ctc_detail
-
-template <class SrcClock>
-struct clock_time_conversion<std::chrono::system_clock, SrcClock>
-{
-    template <class Duration>
-    typename ctc_detail::return_to_sys<SrcClock, Duration>::type
-    operator()(const std::chrono::time_point<SrcClock, Duration>& tp) const
-    {
-        return SrcClock::to_sys(tp);
-    }
-};
-
-template <class DstClock>
-struct clock_time_conversion<DstClock, std::chrono::system_clock>
-{
-    template <class Duration>
-    typename ctc_detail::return_from_sys<DstClock, Duration>::type
-    operator()(const sys_time<Duration>& st) const
-    {
-        return DstClock::from_sys(st);
-    }
-};
-
-template <class SrcClock>
-struct clock_time_conversion<utc_clock, SrcClock>
-{
-    template <class Duration>
-    typename ctc_detail::return_to_utc<SrcClock, Duration>::type
-    operator()(const std::chrono::time_point<SrcClock, Duration>& tp) const
-    {
-        return SrcClock::to_utc(tp);
-    }
-};
-
-template <class DstClock>
-struct clock_time_conversion<DstClock, utc_clock>
-{
-    template <class Duration>
-    typename ctc_detail::return_from_utc<DstClock, Duration>::type
-    operator()(const utc_time<Duration>& ut) const
-    {
-        return DstClock::from_utc(ut);
-    }
-};
-
-namespace clock_cast_detail
-{
-
-template <class Clock, class Duration>
-    using time_point = std::chrono::time_point<Clock, Duration>;
-using std::chrono::system_clock;
-
-template <class DstClock, class SrcClock, class Duration>
-auto
-conv_clock(const time_point<SrcClock, Duration>& t)
-    -> decltype(std::declval<clock_time_conversion<DstClock, SrcClock>>()(t))
-{
-    return clock_time_conversion<DstClock, SrcClock>{}(t);
-}
-
-//direct trait conversion, 1st candidate
-template <class DstClock, class SrcClock, class Duration>
-auto
-cc_impl(const time_point<SrcClock, Duration>& t, const time_point<SrcClock, Duration>*)
-    -> decltype(conv_clock<DstClock>(t))
-{
-    return conv_clock<DstClock>(t);
-}
-
-//conversion through sys, 2nd candidate
-template <class DstClock, class SrcClock, class Duration>
-auto
-cc_impl(const time_point<SrcClock, Duration>& t, const void*)
-    -> decltype(conv_clock<DstClock>(conv_clock<system_clock>(t)))
-{
-    return conv_clock<DstClock>(conv_clock<system_clock>(t));
-}
-
-//conversion through utc, 2nd candidate
-template <class DstClock, class SrcClock, class Duration>
-auto
-cc_impl(const time_point<SrcClock, Duration>& t, const void*)
-    -> decltype(0,  // MSVC_WORKAROUND
-                conv_clock<DstClock>(conv_clock<utc_clock>(t)))
-{
-    return conv_clock<DstClock>(conv_clock<utc_clock>(t));
-}
-
-//conversion through sys and utc, 3rd candidate
-template <class DstClock, class SrcClock, class Duration>
-auto
-cc_impl(const time_point<SrcClock, Duration>& t, ...)
-    -> decltype(conv_clock<DstClock>(conv_clock<utc_clock>(conv_clock<system_clock>(t))))
-{
-    return conv_clock<DstClock>(conv_clock<utc_clock>(conv_clock<system_clock>(t)));
-}
-
-//conversion through utc and sys, 3rd candidate
-template <class DstClock, class SrcClock, class Duration>
-auto
-cc_impl(const time_point<SrcClock, Duration>& t, ...)
-    -> decltype(0,  // MSVC_WORKAROUND
-                conv_clock<DstClock>(conv_clock<system_clock>(conv_clock<utc_clock>(t))))
-{
-    return conv_clock<DstClock>(conv_clock<system_clock>(conv_clock<utc_clock>(t)));
-}
-
-}  // namespace clock_cast_detail
-
-template <class DstClock, class SrcClock, class Duration>
-auto
-clock_cast(const std::chrono::time_point<SrcClock, Duration>& tp)
-    -> decltype(clock_cast_detail::cc_impl<DstClock>(tp, &tp))
-{
-    return clock_cast_detail::cc_impl<DstClock>(tp, &tp);
-}
-
-// Deprecated API
-
-template <class Duration>
-inline
-sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_sys_time(const utc_time<Duration>& t)
-{
-    return utc_clock::to_sys(t);
-}
-
-template <class Duration>
-inline
-sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_sys_time(const tai_time<Duration>& t)
-{
-    return utc_clock::to_sys(tai_clock::to_utc(t));
-}
-
-template <class Duration>
-inline
-sys_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_sys_time(const gps_time<Duration>& t)
-{
-    return utc_clock::to_sys(gps_clock::to_utc(t));
-}
-
-
-template <class Duration>
-inline
-utc_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_utc_time(const sys_time<Duration>& t)
-{
-    return utc_clock::from_sys(t);
-}
-
-template <class Duration>
-inline
-utc_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_utc_time(const tai_time<Duration>& t)
-{
-    return tai_clock::to_utc(t);
-}
-
-template <class Duration>
-inline
-utc_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_utc_time(const gps_time<Duration>& t)
-{
-    return gps_clock::to_utc(t);
-}
-
-
-template <class Duration>
-inline
-tai_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_tai_time(const sys_time<Duration>& t)
-{
-    return tai_clock::from_utc(utc_clock::from_sys(t));
-}
-
-template <class Duration>
-inline
-tai_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_tai_time(const utc_time<Duration>& t)
-{
-    return tai_clock::from_utc(t);
-}
-
-template <class Duration>
-inline
-tai_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_tai_time(const gps_time<Duration>& t)
-{
-    return tai_clock::from_utc(gps_clock::to_utc(t));
-}
-
-
-template <class Duration>
-inline
-gps_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_gps_time(const sys_time<Duration>& t)
-{
-    return gps_clock::from_utc(utc_clock::from_sys(t));
-}
-
-template <class Duration>
-inline
-gps_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_gps_time(const utc_time<Duration>& t)
-{
-    return gps_clock::from_utc(t);
-}
-
-template <class Duration>
-inline
-gps_time<typename std::common_type<Duration, std::chrono::seconds>::type>
-to_gps_time(const tai_time<Duration>& t)
-{
-    return gps_clock::from_utc(tai_clock::to_utc(t));
-}
-
-#endif  // !MISSING_LEAP_SECONDS
-
-}  // namespace date
-
-#endif  // TZ_H
diff --git a/thirdparty/date/include/date/tz_private.h b/thirdparty/date/include/date/tz_private.h
deleted file mode 100644
index 1aaad8e..0000000
--- a/thirdparty/date/include/date/tz_private.h
+++ /dev/null
@@ -1,318 +0,0 @@
-#ifndef TZ_PRIVATE_H
-#define TZ_PRIVATE_H
-
-// The MIT License (MIT)
-//
-// Copyright (c) 2015, 2016 Howard Hinnant
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-// Our apologies.  When the previous paragraph was written, lowercase had not yet
-// been invented (that would involve another several millennia of evolution).
-// We did not mean to shout.
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-#include "tz.h"
-#else
-#include "date.h"
-#include <vector>
-#endif
-
-namespace date
-{
-
-namespace detail
-{
-
-#if !USE_OS_TZDB
-
-enum class tz {utc, local, standard};
-
-//forward declare to avoid warnings in gcc 6.2
-class MonthDayTime;
-std::istream& operator>>(std::istream& is, MonthDayTime& x);
-std::ostream& operator<<(std::ostream& os, const MonthDayTime& x);
-
-
-class MonthDayTime
-{
-private:
-    struct pair
-    {
-#if defined(_MSC_VER) && (_MSC_VER < 1900)
-        pair() : month_day_(date::jan / 1), weekday_(0U) {}
-
-        pair(const date::month_day& month_day, const date::weekday& weekday)
-            : month_day_(month_day), weekday_(weekday) {}
-#endif
-
-        date::month_day month_day_;
-        date::weekday   weekday_;
-    };
-
-    enum Type {month_day, month_last_dow, lteq, gteq};
-
-    Type                         type_{month_day};
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-    union U
-#else
-    struct U
-#endif
-    {
-        date::month_day          month_day_;
-        date::month_weekday_last month_weekday_last_;
-        pair                     month_day_weekday_;
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-        U() : month_day_{date::jan/1} {}
-#else
-        U() :
-            month_day_(date::jan/1),
-            month_weekday_last_(date::month(0U), date::weekday_last(date::weekday(0U)))
-        {}
-
-#endif // !defined(_MSC_VER) || (_MSC_VER >= 1900)
-
-        U& operator=(const date::month_day& x);
-        U& operator=(const date::month_weekday_last& x);
-        U& operator=(const pair& x);
-    } u;
-
-    std::chrono::hours           h_{0};
-    std::chrono::minutes         m_{0};
-    std::chrono::seconds         s_{0};
-    tz                           zone_{tz::local};
-
-public:
-    MonthDayTime() = default;
-    MonthDayTime(local_seconds tp, tz timezone);
-    MonthDayTime(const date::month_day& md, tz timezone);
-
-    date::day day() const;
-    date::month month() const;
-    tz zone() const {return zone_;}
-
-    void canonicalize(date::year y);
-
-    sys_seconds
-       to_sys(date::year y, std::chrono::seconds offset, std::chrono::seconds save) const;
-    sys_days to_sys_days(date::year y) const;
-
-    sys_seconds to_time_point(date::year y) const;
-    int compare(date::year y, const MonthDayTime& x, date::year yx,
-                std::chrono::seconds offset, std::chrono::minutes prev_save) const;
-
-    friend std::istream& operator>>(std::istream& is, MonthDayTime& x);
-    friend std::ostream& operator<<(std::ostream& os, const MonthDayTime& x);
-};
-
-// A Rule specifies one or more set of datetimes without using an offset.
-// Multiple dates are specified with multiple years.  The years in effect
-// go from starting_year_ to ending_year_, inclusive.  starting_year_ <=
-// ending_year_. save_ is in effect for times from the specified time
-// onward, including the specified time. When the specified time is
-// local, it uses the save_ from the chronologically previous Rule, or if
-// there is none, 0.
-
-//forward declare to avoid warnings in gcc 6.2
-class Rule;
-bool operator==(const Rule& x, const Rule& y);
-bool operator<(const Rule& x, const Rule& y);
-bool operator==(const Rule& x, const date::year& y);
-bool operator<(const Rule& x, const date::year& y);
-bool operator==(const date::year& x, const Rule& y);
-bool operator<(const date::year& x, const Rule& y);
-bool operator==(const Rule& x, const std::string& y);
-bool operator<(const Rule& x, const std::string& y);
-bool operator==(const std::string& x, const Rule& y);
-bool operator<(const std::string& x, const Rule& y);
-std::ostream& operator<<(std::ostream& os, const Rule& r);
-
-class Rule
-{
-private:
-    std::string          name_;
-    date::year           starting_year_{0};
-    date::year           ending_year_{0};
-    MonthDayTime         starting_at_;
-    std::chrono::minutes save_{0};
-    std::string          abbrev_;
-
-public:
-    Rule() = default;
-    explicit Rule(const std::string& s);
-    Rule(const Rule& r, date::year starting_year, date::year ending_year);
-
-    const std::string& name() const {return name_;}
-    const std::string& abbrev() const {return abbrev_;}
-
-    const MonthDayTime&         mdt()           const {return starting_at_;}
-    const date::year&           starting_year() const {return starting_year_;}
-    const date::year&           ending_year()   const {return ending_year_;}
-    const std::chrono::minutes& save()          const {return save_;}
-
-    static void split_overlaps(std::vector<Rule>& rules);
-
-    friend bool operator==(const Rule& x, const Rule& y);
-    friend bool operator<(const Rule& x, const Rule& y);
-    friend bool operator==(const Rule& x, const date::year& y);
-    friend bool operator<(const Rule& x, const date::year& y);
-    friend bool operator==(const date::year& x, const Rule& y);
-    friend bool operator<(const date::year& x, const Rule& y);
-    friend bool operator==(const Rule& x, const std::string& y);
-    friend bool operator<(const Rule& x, const std::string& y);
-    friend bool operator==(const std::string& x, const Rule& y);
-    friend bool operator<(const std::string& x, const Rule& y);
-
-    friend std::ostream& operator<<(std::ostream& os, const Rule& r);
-
-private:
-    date::day day() const;
-    date::month month() const;
-    static void split_overlaps(std::vector<Rule>& rules, std::size_t i, std::size_t& e);
-    static bool overlaps(const Rule& x, const Rule& y);
-    static void split(std::vector<Rule>& rules, std::size_t i, std::size_t k,
-                      std::size_t& e);
-};
-
-inline bool operator!=(const Rule& x, const Rule& y) {return !(x == y);}
-inline bool operator> (const Rule& x, const Rule& y) {return   y < x;}
-inline bool operator<=(const Rule& x, const Rule& y) {return !(y < x);}
-inline bool operator>=(const Rule& x, const Rule& y) {return !(x < y);}
-
-inline bool operator!=(const Rule& x, const date::year& y) {return !(x == y);}
-inline bool operator> (const Rule& x, const date::year& y) {return   y < x;}
-inline bool operator<=(const Rule& x, const date::year& y) {return !(y < x);}
-inline bool operator>=(const Rule& x, const date::year& y) {return !(x < y);}
-
-inline bool operator!=(const date::year& x, const Rule& y) {return !(x == y);}
-inline bool operator> (const date::year& x, const Rule& y) {return   y < x;}
-inline bool operator<=(const date::year& x, const Rule& y) {return !(y < x);}
-inline bool operator>=(const date::year& x, const Rule& y) {return !(x < y);}
-
-inline bool operator!=(const Rule& x, const std::string& y) {return !(x == y);}
-inline bool operator> (const Rule& x, const std::string& y) {return   y < x;}
-inline bool operator<=(const Rule& x, const std::string& y) {return !(y < x);}
-inline bool operator>=(const Rule& x, const std::string& y) {return !(x < y);}
-
-inline bool operator!=(const std::string& x, const Rule& y) {return !(x == y);}
-inline bool operator> (const std::string& x, const Rule& y) {return   y < x;}
-inline bool operator<=(const std::string& x, const Rule& y) {return !(y < x);}
-inline bool operator>=(const std::string& x, const Rule& y) {return !(x < y);}
-
-struct zonelet
-{
-    enum tag {has_rule, has_save, is_empty};
-
-    std::chrono::seconds gmtoff_;
-    tag tag_ = has_rule;
-
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-    union U
-#else
-    struct U
-#endif
-    {
-        std::string          rule_;
-        std::chrono::minutes save_;
-
-        ~U() {}
-        U() {}
-        U(const U&) {}
-        U& operator=(const U&) = delete;
-    } u;
-
-    std::string                        format_;
-    date::year                         until_year_{0};
-    MonthDayTime                       until_date_;
-    sys_seconds                        until_utc_;
-    local_seconds                      until_std_;
-    local_seconds                      until_loc_;
-    std::chrono::minutes               initial_save_{};
-    std::string                        initial_abbrev_;
-    std::pair<const Rule*, date::year> first_rule_{nullptr, date::year::min()};
-    std::pair<const Rule*, date::year> last_rule_{nullptr, date::year::max()};
-
-    ~zonelet();
-    zonelet();
-    zonelet(const zonelet& i);
-    zonelet& operator=(const zonelet&) = delete;
-};
-
-#else  // USE_OS_TZDB
-
-struct ttinfo
-{
-    std::int32_t  tt_gmtoff;
-    unsigned char tt_isdst;
-    unsigned char tt_abbrind;
-    unsigned char pad[2];
-};
-
-static_assert(sizeof(ttinfo) == 8, "");
-
-struct expanded_ttinfo
-{
-    std::chrono::seconds offset;
-    std::string          abbrev;
-    bool                 is_dst;
-};
-
-struct transition
-{
-    sys_seconds            timepoint;
-    const expanded_ttinfo* info;
-
-    transition(sys_seconds tp, const expanded_ttinfo* i = nullptr)
-        : timepoint(tp)
-        , info(i)
-        {}
-
-    friend
-    std::ostream&
-    operator<<(std::ostream& os, const transition& t)
-    {
-        using namespace date;
-        using namespace std::chrono;
-        using date::operator<<;
-        os << t.timepoint << "Z ";
-        if (t.info->offset >= seconds{0})
-            os << '+';
-        os << make_time(t.info->offset);
-        if (t.info->is_dst > 0)
-            os << " daylight ";
-        else
-            os << " standard ";
-        os << t.info->abbrev;
-        return os;
-    }
-};
-
-#endif  // USE_OS_TZDB
-
-}  // namespace detail
-
-}  // namespace date
-
-#if defined(_MSC_VER) && (_MSC_VER < 1900)
-#include "tz.h"
-#endif
-
-#endif  // TZ_PRIVATE_H
diff --git a/thirdparty/date/src/ios.mm b/thirdparty/date/src/ios.mm
deleted file mode 100644
index 105e5c0..0000000
--- a/thirdparty/date/src/ios.mm
+++ /dev/null
@@ -1,337 +0,0 @@
-//
-// The MIT License (MIT)
-//
-// Copyright (c) 2016 Alexander Kormanovsky
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-
-#include "ios.h"
-
-#if TARGET_OS_IPHONE
-
-#include <Foundation/Foundation.h>
-
-#include <fstream>
-#include <zlib.h>
-#include <sys/stat.h>
-
-#ifndef TAR_DEBUG
-#  define TAR_DEBUG 0
-#endif
-
-#define INTERNAL_DIR        "Library"
-#define TZDATA_DIR          "tzdata"
-#define TARGZ_EXTENSION     "tar.gz"
-
-#define TAR_BLOCK_SIZE                  512
-#define TAR_TYPE_POSITION               156
-#define TAR_NAME_POSITION               0
-#define TAR_NAME_SIZE                   100
-#define TAR_SIZE_POSITION               124
-#define TAR_SIZE_SIZE                   12
-
-namespace date
-{
-    namespace iOSUtils
-    {
-        
-        struct TarInfo
-        {
-            char objType;
-            std::string objName;
-            size_t realContentSize; // writable size without padding zeroes
-            size_t blocksContentSize; // adjusted size to 512 bytes blocks
-            bool success;
-        };
-        
-        std::string convertCFStringRefPathToCStringPath(CFStringRef ref);
-        bool extractTzdata(CFURLRef homeUrl, CFURLRef archiveUrl, std::string destPath);
-        TarInfo getTarObjectInfo(std::ifstream &readStream);
-        std::string getTarObject(std::ifstream &readStream, int64_t size);
-        bool writeFile(const std::string &tzdataPath, const std::string &fileName,
-                       const std::string &data, size_t realContentSize);
-        
-        std::string
-        get_current_timezone()
-        {
-            CFTimeZoneRef tzRef = CFTimeZoneCopySystem();
-            CFStringRef tzNameRef = CFTimeZoneGetName(tzRef);
-            CFIndex bufferSize = CFStringGetLength(tzNameRef) + 1;
-            char buffer[bufferSize];
-            
-            if (CFStringGetCString(tzNameRef, buffer, bufferSize, kCFStringEncodingUTF8))
-            {
-                CFRelease(tzRef);
-                return std::string(buffer);
-            }
-            
-            CFRelease(tzRef);
-            
-            return "";
-        }
-        
-        std::string
-        get_tzdata_path()
-        {
-            CFURLRef homeUrlRef = CFCopyHomeDirectoryURL();
-            CFStringRef homePath = CFURLCopyPath(homeUrlRef);
-            std::string path(std::string(convertCFStringRefPathToCStringPath(homePath)) +
-                             INTERNAL_DIR + "/" + TZDATA_DIR);
-            std::string result_path(std::string(convertCFStringRefPathToCStringPath(homePath)) +
-                                    INTERNAL_DIR);
-            
-            if (access(path.c_str(), F_OK) == 0)
-            {
-#if TAR_DEBUG
-                printf("tzdata dir exists\n");
-#endif
-                CFRelease(homeUrlRef);
-                CFRelease(homePath);
-                
-                return result_path;
-            }
-            
-            CFBundleRef mainBundle = CFBundleGetMainBundle();
-            CFArrayRef paths = CFBundleCopyResourceURLsOfType(mainBundle, CFSTR(TARGZ_EXTENSION),
-                                                              NULL);
-            
-            if (CFArrayGetCount(paths) != 0)
-            {
-                // get archive path, assume there is no other tar.gz in bundle
-                CFURLRef archiveUrl = static_cast<CFURLRef>(CFArrayGetValueAtIndex(paths, 0));
-                CFStringRef archiveName = CFURLCopyPath(archiveUrl);
-                archiveUrl = CFBundleCopyResourceURL(mainBundle, archiveName, NULL, NULL);
-                
-                extractTzdata(homeUrlRef, archiveUrl, path);
-                
-                CFRelease(archiveUrl);
-                CFRelease(archiveName);
-            }
-            
-            CFRelease(homeUrlRef);
-            CFRelease(homePath);
-            CFRelease(paths);
-            
-            return result_path;
-        }
-        
-        std::string
-        convertCFStringRefPathToCStringPath(CFStringRef ref)
-        {
-            CFIndex bufferSize = CFStringGetMaximumSizeOfFileSystemRepresentation(ref);
-            char *buffer = new char[bufferSize];
-            CFStringGetFileSystemRepresentation(ref, buffer, bufferSize);
-            auto result = std::string(buffer);
-            delete[] buffer;
-            return result;
-        }
-        
-        bool
-        extractTzdata(CFURLRef homeUrl, CFURLRef archiveUrl, std::string destPath)
-        {
-            std::string TAR_TMP_PATH = "/tmp.tar";
-            
-            CFStringRef homeStringRef = CFURLCopyPath(homeUrl);
-            auto homePath = convertCFStringRefPathToCStringPath(homeStringRef);
-            CFRelease(homeStringRef);
-            
-            CFStringRef archiveStringRef = CFURLCopyPath(archiveUrl);
-            auto archivePath = convertCFStringRefPathToCStringPath(archiveStringRef);
-            CFRelease(archiveStringRef);
-            
-            // create Library path
-            auto libraryPath = homePath + INTERNAL_DIR;
-            
-            // create tzdata path
-            auto tzdataPath = libraryPath + "/" + TZDATA_DIR;
-            
-            // -- replace %20 with " "
-            const std::string search = "%20";
-            const std::string replacement = " ";
-            size_t pos = 0;
-            
-            while ((pos = archivePath.find(search, pos)) != std::string::npos) {
-                archivePath.replace(pos, search.length(), replacement);
-                pos += replacement.length();
-            }
-            
-            gzFile tarFile = gzopen(archivePath.c_str(), "rb");
-            
-            // create tar unpacking path
-            auto tarPath = libraryPath + TAR_TMP_PATH;
-            
-            // create tzdata directory
-            mkdir(destPath.c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
-            
-            // ======= extract tar ========
-            
-            std::ofstream os(tarPath.c_str(), std::ofstream::out | std::ofstream::app);
-            unsigned int bufferLength = 1024 * 256;  // 256Kb
-            unsigned char *buffer = (unsigned char *)malloc(bufferLength);
-            bool success = true;
-            
-            while (true)
-            {
-                int readBytes = gzread(tarFile, buffer, bufferLength);
-                
-                if (readBytes > 0)
-                {
-                    os.write((char *) &buffer[0], readBytes);
-                }
-                else
-                    if (readBytes == 0)
-                    {
-                        break;
-                    }
-                    else
-                        if (readBytes == -1)
-                        {
-                            printf("decompression failed\n");
-                            success = false;
-                            break;
-                        }
-                        else
-                        {
-                            printf("unexpected zlib state\n");
-                            success = false;
-                            break;
-                        }
-            }
-            
-            os.close();
-            free(buffer);
-            gzclose(tarFile);
-            
-            if (!success)
-            {
-                remove(tarPath.c_str());
-                return false;
-            }
-            
-            // ======== extract files =========
-            
-            uint64_t location = 0; // Position in the file
-            
-            // get file size
-            struct stat stat_buf;
-            int res = stat(tarPath.c_str(), &stat_buf);
-            if (res != 0)
-            {
-                printf("error file size\n");
-                remove(tarPath.c_str());
-                return false;
-            }
-            int64_t tarSize = stat_buf.st_size;
-            
-            // create read stream
-            std::ifstream is(tarPath.c_str(), std::ifstream::in | std::ifstream::binary);
-            
-            // process files
-            while (location < tarSize)
-            {
-                TarInfo info = getTarObjectInfo(is);
-                
-                if (!info.success || info.realContentSize == 0)
-                {
-                    break; // something wrong or all files are read
-                }
-                
-                switch (info.objType)
-                {
-                    case '0':   // file
-                    case '\0':  //
-                    {
-                        std::string obj = getTarObject(is, info.blocksContentSize);
-#if TAR_DEBUG
-                        size += info.realContentSize;
-                        printf("#%i %s file size %lld written total %ld from %lld\n", ++count,
-                               info.objName.c_str(), info.realContentSize, size, tarSize);
-#endif
-                        writeFile(tzdataPath, info.objName, obj, info.realContentSize);
-                        location += info.blocksContentSize;
-                        
-                        break;
-                    }
-                }
-            }
-            
-            remove(tarPath.c_str());
-            
-            return true;
-        }
-        
-        TarInfo
-        getTarObjectInfo(std::ifstream &readStream)
-        {
-            int64_t length = TAR_BLOCK_SIZE;
-            char buffer[length];
-            char type;
-            char name[TAR_NAME_SIZE + 1];
-            char sizeBuf[TAR_SIZE_SIZE + 1];
-            
-            readStream.read(buffer, length);
-            
-            memcpy(&type, &buffer[TAR_TYPE_POSITION], 1);
-            
-            memset(&name, '\0', TAR_NAME_SIZE + 1);
-            memcpy(&name, &buffer[TAR_NAME_POSITION], TAR_NAME_SIZE);
-            
-            memset(&sizeBuf, '\0', TAR_SIZE_SIZE + 1);
-            memcpy(&sizeBuf, &buffer[TAR_SIZE_POSITION], TAR_SIZE_SIZE);
-            size_t realSize = strtol(sizeBuf, NULL, 8);
-            size_t blocksSize = realSize + (TAR_BLOCK_SIZE - (realSize % TAR_BLOCK_SIZE));
-            
-            return {type, std::string(name), realSize, blocksSize, true};
-        }
-        
-        std::string
-        getTarObject(std::ifstream &readStream, int64_t size)
-        {
-            char buffer[size];
-            readStream.read(buffer, size);
-            return std::string(buffer);
-        }
-        
-        bool
-        writeFile(const std::string &tzdataPath, const std::string &fileName, const std::string &data,
-                  size_t realContentSize)
-        {
-            std::ofstream os(tzdataPath + "/" + fileName, std::ofstream::out | std::ofstream::binary);
-            
-            if (!os) {
-                return false;
-            }
-            
-            // trim empty space
-            char trimmedData[realContentSize + 1];
-            memset(&trimmedData, '\0', realContentSize);
-            memcpy(&trimmedData, data.c_str(), realContentSize);
-            
-            // write
-            os.write(trimmedData, realContentSize);
-            os.close();
-            
-            return true;
-        }
-        
-    }  // namespace iOSUtils
-}  // namespace date
-
-#endif  // TARGET_OS_IPHONE
diff --git a/thirdparty/date/src/tz.cpp b/thirdparty/date/src/tz.cpp
deleted file mode 100644
index f4a819b..0000000
--- a/thirdparty/date/src/tz.cpp
+++ /dev/null
@@ -1,3788 +0,0 @@
-// The MIT License (MIT)
-//
-// Copyright (c) 2015, 2016, 2017 Howard Hinnant
-// Copyright (c) 2015 Ville Voutilainen
-// Copyright (c) 2016 Alexander Kormanovsky
-// Copyright (c) 2016, 2017 Jiangang Zhuang
-// Copyright (c) 2017 Nicolas Veloz Savino
-// Copyright (c) 2017 Florian Dang
-// Copyright (c) 2017 Aaron Bishop
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in all
-// copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-// SOFTWARE.
-//
-// Our apologies.  When the previous paragraph was written, lowercase had not yet
-// been invented (that would involve another several millennia of evolution).
-// We did not mean to shout.
-
-#ifdef _WIN32
-   // windows.h will be included directly and indirectly (e.g. by curl).
-   // We need to define these macros to prevent windows.h bringing in
-   // more than we need and do it early so windows.h doesn't get included
-   // without these macros having been defined.
-   // min/max macros interfere with the C++ versions.
-#  ifndef NOMINMAX
-#    define NOMINMAX
-#  endif
-   // We don't need all that Windows has to offer.
-#  ifndef WIN32_LEAN_AND_MEAN
-#    define WIN32_LEAN_AND_MEAN
-#  endif
-
-   // for wcstombs
-#  ifndef _CRT_SECURE_NO_WARNINGS
-#    define _CRT_SECURE_NO_WARNINGS
-#  endif
-
-   // None of this happens with the MS SDK (at least VS14 which I tested), but:
-   // Compiling with mingw, we get "error: 'KF_FLAG_DEFAULT' was not declared in this scope."
-   // and error: 'SHGetKnownFolderPath' was not declared in this scope.".
-   // It seems when using mingw NTDDI_VERSION is undefined and that
-   // causes KNOWN_FOLDER_FLAG and the KF_ flags to not get defined.
-   // So we must define NTDDI_VERSION to get those flags on mingw.
-   // The docs say though here:
-   // https://msdn.microsoft.com/en-nz/library/windows/desktop/aa383745(v=vs.85).aspx
-   // that "If you define NTDDI_VERSION, you must also define _WIN32_WINNT."
-   // So we declare we require Vista or greater.
-#  ifdef __MINGW32__
-
-#    ifndef NTDDI_VERSION
-#      define NTDDI_VERSION 0x06000000
-#      define _WIN32_WINNT _WIN32_WINNT_VISTA
-#    elif NTDDI_VERSION < 0x06000000
-#      warning "If this fails to compile NTDDI_VERSION may be to low. See comments above."
-#    endif
-     // But once we define the values above we then get this linker error:
-     // "tz.cpp:(.rdata$.refptr.FOLDERID_Downloads[.refptr.FOLDERID_Downloads]+0x0): "
-     //     "undefined reference to `FOLDERID_Downloads'"
-     // which #include <initguid.h> cures see:
-     // https://support.microsoft.com/en-us/kb/130869
-#    include <initguid.h>
-     // But with <initguid.h> included, the error moves on to:
-     // error: 'FOLDERID_Downloads' was not declared in this scope
-     // Which #include <knownfolders.h> cures.
-#    include <knownfolders.h>
-
-#  endif  // __MINGW32__
-
-#  include <windows.h>
-#endif  // _WIN32
-
-#include "date/tz_private.h"
-
-#ifdef __APPLE__
-#  include "date/ios.h"
-#else
-#  define TARGET_OS_IPHONE 0
-#endif
-
-#if USE_OS_TZDB
-#  include <dirent.h>
-#endif
-#include <algorithm>
-#include <cctype>
-#include <cstdlib>
-#include <cstring>
-#include <exception>
-#include <fstream>
-#include <iostream>
-#include <iterator>
-#include <memory>
-#if USE_OS_TZDB
-#  include <queue>
-#endif
-#include <sstream>
-#include <string>
-#include <tuple>
-#include <vector>
-#include <sys/stat.h>
-
-// unistd.h is used on some platforms as part of the the means to get
-// the current time zone. On Win32 windows.h provides a means to do it.
-// gcc/mingw supports unistd.h on Win32 but MSVC does not.
-
-#ifdef _WIN32
-#  include <io.h> // _unlink etc.
-
-#  if defined(__clang__)
-    struct IUnknown;    // fix for issue with static_cast<> in objbase.h
-                        //   (see https://github.com/philsquared/Catch/issues/690)
-#  endif
-
-#  include <shlobj.h> // CoTaskFree, ShGetKnownFolderPath etc.
-#  if HAS_REMOTE_API
-#    include <direct.h> // _mkdir
-#    include <shellapi.h> // ShFileOperation etc.
-#  endif  // HAS_REMOTE_API
-#else   // !_WIN32
-#  include <unistd.h>
-#  if !USE_OS_TZDB
-#    include <wordexp.h>
-#  endif
-#  include <limits.h>
-#  include <string.h>
-#  if !USE_SHELL_API
-#    include <sys/stat.h>
-#    include <sys/fcntl.h>
-#    include <dirent.h>
-#    include <cstring>
-#    include <sys/wait.h>
-#    include <sys/types.h>
-#  endif //!USE_SHELL_API
-#endif  // !_WIN32
-
-
-#if HAS_REMOTE_API
-   // Note curl includes windows.h so we must include curl AFTER definitions of things
-   // that affect windows.h such as NOMINMAX.
-#if defined(_MSC_VER) && defined(SHORTENED_CURL_INCLUDE)
-   // For rmt_curl nuget package
-#  include <curl.h>
-#else
-#  include <curl/curl.h>
-#endif
-#endif
-
-#ifdef _WIN32
-static CONSTDATA char folder_delimiter = '\\';
-#else   // !_WIN32
-static CONSTDATA char folder_delimiter = '/';
-#endif  // !_WIN32
-
-#if defined(__GNUC__) && __GNUC__ < 5
-   // GCC 4.9 Bug 61489 Wrong warning with -Wmissing-field-initializers
-#  pragma GCC diagnostic push
-#  pragma GCC diagnostic ignored "-Wmissing-field-initializers"
-#endif  // defined(__GNUC__) && __GNUC__ < 5
-
-#if !USE_OS_TZDB
-
-#  ifdef _WIN32
-
-namespace
-{
-    struct task_mem_deleter
-    {
-        void operator()(wchar_t buf[])
-        {
-            if (buf != nullptr)
-                CoTaskMemFree(buf);
-        }
-    };
-    using co_task_mem_ptr = std::unique_ptr<wchar_t[], task_mem_deleter>;
-}
-
-// We might need to know certain locations even if not using the remote API,
-// so keep these routines out of that block for now.
-static
-std::string
-get_known_folder(const GUID& folderid)
-{
-    std::string folder;
-    PWSTR pfolder = nullptr;
-    HRESULT hr = SHGetKnownFolderPath(folderid, KF_FLAG_DEFAULT, nullptr, &pfolder);
-    if (SUCCEEDED(hr))
-    {
-        co_task_mem_ptr folder_ptr(pfolder);
-        folder = std::string(folder_ptr.get(), folder_ptr.get() + wcslen(folder_ptr.get()));
-    }
-    return folder;
-}
-
-// Usually something like "c:\Users\username\Downloads".
-static
-std::string
-get_download_folder()
-{
-    return get_known_folder(FOLDERID_Downloads);
-}
-
-#  else // !_WIN32
-
-#    if !defined(INSTALL) || HAS_REMOTE_API
-
-static
-std::string
-expand_path(std::string path)
-{
-#      if TARGET_OS_IPHONE
-    return date::iOSUtils::get_tzdata_path();
-#      else  // !TARGET_OS_IPHONE
-    ::wordexp_t w{};
-    std::unique_ptr<::wordexp_t, void(*)(::wordexp_t*)> hold{&w, ::wordfree};
-    ::wordexp(path.c_str(), &w, 0);
-    if (w.we_wordc != 1)
-        throw std::runtime_error("Cannot expand path: " + path);
-    path = w.we_wordv[0];
-    return path;
-#      endif  // !TARGET_OS_IPHONE
-}
-
-static
-std::string
-get_download_folder()
-{
-    return expand_path("~/Downloads");
-}
-
-#    endif // !defined(INSTALL) || HAS_REMOTE_API
-
-#  endif  // !_WIN32
-
-#endif  // !USE_OS_TZDB
-
-namespace date
-{
-// +---------------------+
-// | Begin Configuration |
-// +---------------------+
-
-using namespace detail;
-
-#if !USE_OS_TZDB
-
-static
-std::string&
-access_install()
-{
-    static std::string install
-#ifndef INSTALL
-
-    = get_download_folder() + folder_delimiter + "tzdata";
-
-#else   // !INSTALL
-
-#  define STRINGIZEIMP(x) #x
-#  define STRINGIZE(x) STRINGIZEIMP(x)
-
-    = STRINGIZE(INSTALL) + std::string(1, folder_delimiter) + "tzdata";
-
-    #undef STRINGIZEIMP
-    #undef STRINGIZE
-#endif  // !INSTALL
-
-    return install;
-}
-
-void
-set_install(const std::string& s)
-{
-    access_install() = s;
-}
-
-static
-const std::string&
-get_install()
-{
-    static const std::string& ref = access_install();
-    return ref;
-}
-
-#if HAS_REMOTE_API
-static
-std::string
-get_download_gz_file(const std::string& version)
-{
-    auto file = get_install() + version + ".tar.gz";
-    return file;
-}
-#endif  // HAS_REMOTE_API
-
-#endif  // !USE_OS_TZDB
-
-// These can be used to reduce the range of the database to save memory
-CONSTDATA auto min_year = date::year::min();
-CONSTDATA auto max_year = date::year::max();
-
-CONSTDATA auto min_day = date::jan/1;
-CONSTDATA auto max_day = date::dec/31;
-
-#if USE_OS_TZDB
-
-CONSTCD14 const sys_seconds min_seconds = sys_days(min_year/min_day);
-
-#endif  // USE_OS_TZDB
-
-#ifndef _WIN32
-
-static
-std::string
-discover_tz_dir()
-{
-    struct stat sb;
-    using namespace std;
-#  ifndef __APPLE__
-    CONSTDATA auto tz_dir_default = "/usr/share/zoneinfo";
-    CONSTDATA auto tz_dir_buildroot = "/usr/share/zoneinfo/uclibc";
-
-    // Check special path which is valid for buildroot with uclibc builds
-    if(stat(tz_dir_buildroot, &sb) == 0 && S_ISDIR(sb.st_mode))
-        return tz_dir_buildroot;
-    else if(stat(tz_dir_default, &sb) == 0 && S_ISDIR(sb.st_mode))
-        return tz_dir_default;
-    else
-        throw runtime_error("discover_tz_dir failed to find zoneinfo\n");
-#  else  // __APPLE__
-#      if TARGET_OS_IPHONE
-    return "/var/db/timezone/zoneinfo";
-#      else
-    CONSTDATA auto timezone = "/etc/localtime";
-    if (!(lstat(timezone, &sb) == 0 && S_ISLNK(sb.st_mode) && sb.st_size > 0))
-        throw runtime_error("discover_tz_dir failed\n");
-    string result;
-    char rp[PATH_MAX+1] = {};
-    if (readlink(timezone, rp, sizeof(rp)-1) > 0)
-        result = string(rp);
-    else
-        throw system_error(errno, system_category(), "readlink() failed");
-    auto i = result.find("zoneinfo");
-    if (i == string::npos)
-        throw runtime_error("discover_tz_dir failed to find zoneinfo\n");
-    i = result.find('/', i);
-    if (i == string::npos)
-        throw runtime_error("discover_tz_dir failed to find '/'\n");
-    return result.substr(0, i);
-#      endif
-#  endif  // __APPLE__
-}
-
-static
-const std::string&
-get_tz_dir()
-{
-    static const std::string tz_dir = discover_tz_dir();
-    return tz_dir;
-}
-
-#endif
-
-// +-------------------+
-// | End Configuration |
-// +-------------------+
-
-namespace detail
-{
-struct undocumented {explicit undocumented() = default;};
-}
-
-#ifndef _MSC_VER
-static_assert(min_year <= max_year, "Configuration error");
-#endif
-
-static std::unique_ptr<tzdb> init_tzdb();
-
-tzdb_list::~tzdb_list()
-{
-    const tzdb* ptr = head_;
-    head_ = nullptr;
-    while (ptr != nullptr)
-    {
-        auto next = ptr->next;
-        delete ptr;
-        ptr = next;
-    }
-}
-
-tzdb_list::tzdb_list(tzdb_list&& x) noexcept
-   : head_{x.head_.exchange(nullptr)}
-{
-}
-
-void
-tzdb_list::push_front(tzdb* tzdb) noexcept
-{
-    tzdb->next = head_;
-    head_ = tzdb;
-}
-
-tzdb_list::const_iterator
-tzdb_list::erase_after(const_iterator p) noexcept
-{
-    auto t = p.p_->next;
-    p.p_->next = p.p_->next->next;
-    delete t;
-    return ++p;
-}
-
-struct tzdb_list::undocumented_helper
-{
-    static void push_front(tzdb_list& db_list, tzdb* tzdb) noexcept
-    {
-        db_list.push_front(tzdb);
-    }
-};
-
-static
-tzdb_list
-create_tzdb()
-{
-    tzdb_list tz_db;
-    tzdb_list::undocumented_helper::push_front(tz_db, init_tzdb().release());
-    return tz_db;
-}
-
-tzdb_list&
-get_tzdb_list()
-{
-    static tzdb_list tz_db = create_tzdb();
-    return tz_db;
-}
-
-#if !USE_OS_TZDB
-
-#ifdef _WIN32
-
-static
-void
-sort_zone_mappings(std::vector<date::detail::timezone_mapping>& mappings)
-{
-    std::sort(mappings.begin(), mappings.end(),
-        [](const date::detail::timezone_mapping& lhs,
-           const date::detail::timezone_mapping& rhs)->bool
-    {
-        auto other_result = lhs.other.compare(rhs.other);
-        if (other_result < 0)
-            return true;
-        else if (other_result == 0)
-        {
-            auto territory_result = lhs.territory.compare(rhs.territory);
-            if (territory_result < 0)
-                return true;
-            else if (territory_result == 0)
-            {
-                if (lhs.type < rhs.type)
-                    return true;
-            }
-        }
-        return false;
-    });
-}
-
-static
-bool
-native_to_standard_timezone_name(const std::string& native_tz_name,
-                                 std::string& standard_tz_name)
-{
-    // TOOD! Need be a case insensitive compare?
-    if (native_tz_name == "UTC")
-    {
-        standard_tz_name = "Etc/UTC";
-        return true;
-    }
-    standard_tz_name.clear();
-    // TODO! we can improve on linear search.
-    const auto& mappings = date::get_tzdb().mappings;
-    for (const auto& tzm : mappings)
-    {
-        if (tzm.other == native_tz_name)
-        {
-            standard_tz_name = tzm.type;
-            return true;
-        }
-    }
-    return false;
-}
-
-// Parse this XML file:
-// http://unicode.org/repos/cldr/trunk/common/supplemental/windowsZones.xml
-// The parsing method is designed to be simple and quick. It is not overly
-// forgiving of change but it should diagnose basic format issues.
-// See timezone_mapping structure for more info.
-static
-std::vector<detail::timezone_mapping>
-load_timezone_mappings_from_xml_file(const std::string& input_path)
-{
-    std::size_t line_num = 0;
-    std::vector<detail::timezone_mapping> mappings;
-    std::string line;
-
-    std::ifstream is(input_path);
-    if (!is.is_open())
-    {
-        // We don't emit file exceptions because that's an implementation detail.
-        std::string msg = "Error opening time zone mapping file \"";
-        msg += input_path;
-        msg += "\".";
-        throw std::runtime_error(msg);
-    }
-
-    auto error = [&input_path, &line_num](const char* info)
-    {
-        std::string msg = "Error loading time zone mapping file \"";
-        msg += input_path;
-        msg += "\" at line ";
-        msg += std::to_string(line_num);
-        msg += ": ";
-        msg += info;
-        throw std::runtime_error(msg);
-    };
-    // [optional space]a="b"
-    auto read_attribute = [&line, &error]
-                          (const char* name, std::string& value, std::size_t startPos)
-                          ->std::size_t
-    {
-        value.clear();
-        // Skip leading space before attribute name.
-        std::size_t spos = line.find_first_not_of(' ', startPos);
-        if (spos == std::string::npos)
-            spos = startPos;
-        // Assume everything up to next = is the attribute name
-        // and that an = will always delimit that.
-        std::size_t epos = line.find('=', spos);
-        if (epos == std::string::npos)
-            error("Expected \'=\' right after attribute name.");
-        std::size_t name_len = epos - spos;
-        // Expect the name we find matches the name we expect.
-        if (line.compare(spos, name_len, name) != 0)
-        {
-            std::string msg;
-            msg = "Expected attribute name \'";
-            msg += name;
-            msg += "\' around position ";
-            msg += std::to_string(spos);
-            msg += " but found something else.";
-            error(msg.c_str());
-        }
-        ++epos; // Skip the '=' that is after the attribute name.
-        spos = epos;
-        if (spos < line.length() && line[spos] == '\"')
-            ++spos; // Skip the quote that is before the attribute value.
-        else
-        {
-            std::string msg = "Expected '\"' to begin value of attribute \'";
-            msg += name;
-            msg += "\'.";
-            error(msg.c_str());
-        }
-        epos = line.find('\"', spos);
-        if (epos == std::string::npos)
-        {
-            std::string msg = "Expected '\"' to end value of attribute \'";
-            msg += name;
-            msg += "\'.";
-            error(msg.c_str());
-        }
-        // Extract everything in between the quotes. Note no escaping is done.
-        std::size_t value_len = epos - spos;
-        value.assign(line, spos, value_len);
-        ++epos; // Skip the quote that is after the attribute value;
-        return epos;
-    };
-
-    // Quick but not overly forgiving XML mapping file processing.
-    bool mapTimezonesOpenTagFound = false;
-    bool mapTimezonesCloseTagFound = false;
-    std::size_t mapZonePos = std::string::npos;
-    std::size_t mapTimezonesPos = std::string::npos;
-    CONSTDATA char mapTimeZonesOpeningTag[] = { "<mapTimezones " };
-    CONSTDATA char mapZoneOpeningTag[] = { "<mapZone " };
-    CONSTDATA std::size_t mapZoneOpeningTagLen = sizeof(mapZoneOpeningTag) /
-                                                 sizeof(mapZoneOpeningTag[0]) - 1;
-    while (!mapTimezonesOpenTagFound)
-    {
-        std::getline(is, line);
-        ++line_num;
-        if (is.eof())
-        {
-            // If there is no mapTimezones tag is it an error?
-            // Perhaps if there are no mapZone mappings it might be ok for
-            // its parent mapTimezones element to be missing?
-            // We treat this as an error though on the assumption that if there
-            // really are no mappings we should still get a mapTimezones parent
-            // element but no mapZone elements inside. Assuming we must
-            // find something will hopefully at least catch more drastic formatting
-            // changes or errors than if we don't do this and assume nothing found.
-            error("Expected a mapTimezones opening tag.");
-        }
-        mapTimezonesPos = line.find(mapTimeZonesOpeningTag);
-        mapTimezonesOpenTagFound = (mapTimezonesPos != std::string::npos);
-    }
-
-    // NOTE: We could extract the version info that follows the opening
-    // mapTimezones tag and compare that to the version of other data we have.
-    // I would have expected them to be kept in synch but testing has shown
-    // it typically does not match anyway. So what's the point?
-    while (!mapTimezonesCloseTagFound)
-    {
-        std::ws(is);
-        std::getline(is, line);
-        ++line_num;
-        if (is.eof())
-            error("Expected a mapTimezones closing tag.");
-        if (line.empty())
-            continue;
-        mapZonePos = line.find(mapZoneOpeningTag);
-        if (mapZonePos != std::string::npos)
-        {
-            mapZonePos += mapZoneOpeningTagLen;
-            detail::timezone_mapping zm{};
-            std::size_t pos = read_attribute("other", zm.other, mapZonePos);
-            pos = read_attribute("territory", zm.territory, pos);
-            read_attribute("type", zm.type, pos);
-            mappings.push_back(std::move(zm));
-
-            continue;
-        }
-        mapTimezonesPos = line.find("</mapTimezones>");
-        mapTimezonesCloseTagFound = (mapTimezonesPos != std::string::npos);
-        if (!mapTimezonesCloseTagFound)
-        {
-            std::size_t commentPos = line.find("<!--");
-            if (commentPos == std::string::npos)
-                error("Unexpected mapping record found. A xml mapZone or comment "
-                      "attribute or mapTimezones closing tag was expected.");
-        }
-    }
-
-    is.close();
-    return mappings;
-}
-
-#endif  // _WIN32
-
-// Parsing helpers
-
-static
-std::string
-parse3(std::istream& in)
-{
-    std::string r(3, ' ');
-    ws(in);
-    r[0] = static_cast<char>(in.get());
-    r[1] = static_cast<char>(in.get());
-    r[2] = static_cast<char>(in.get());
-    return r;
-}
-
-static
-unsigned
-parse_dow(std::istream& in)
-{
-    CONSTDATA char*const dow_names[] =
-        {"Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"};
-    auto s = parse3(in);
-    auto dow = std::find(std::begin(dow_names), std::end(dow_names), s) - dow_names;
-    if (dow >= std::end(dow_names) - std::begin(dow_names))
-        throw std::runtime_error("oops: bad dow name: " + s);
-    return static_cast<unsigned>(dow);
-}
-
-static
-unsigned
-parse_month(std::istream& in)
-{
-    CONSTDATA char*const month_names[] =
-        {"Jan", "Feb", "Mar", "Apr", "May", "Jun",
-         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"};
-    auto s = parse3(in);
-    auto m = std::find(std::begin(month_names), std::end(month_names), s) - month_names;
-    if (m >= std::end(month_names) - std::begin(month_names))
-        throw std::runtime_error("oops: bad month name: " + s);
-    return static_cast<unsigned>(++m);
-}
-
-static
-std::chrono::seconds
-parse_unsigned_time(std::istream& in)
-{
-    using namespace std::chrono;
-    int x;
-    in >> x;
-    auto r = seconds{hours{x}};
-    if (!in.eof() && in.peek() == ':')
-    {
-        in.get();
-        in >> x;
-        r += minutes{x};
-        if (!in.eof() && in.peek() == ':')
-        {
-            in.get();
-            in >> x;
-            r += seconds{x};
-        }
-    }
-    return r;
-}
-
-static
-std::chrono::seconds
-parse_signed_time(std::istream& in)
-{
-    ws(in);
-    auto sign = 1;
-    if (in.peek() == '-')
-    {
-        sign = -1;
-        in.get();
-    }
-    else if (in.peek() == '+')
-        in.get();
-    return sign * parse_unsigned_time(in);
-}
-
-// MonthDayTime
-
-detail::MonthDayTime::MonthDayTime(local_seconds tp, tz timezone)
-    : zone_(timezone)
-{
-    using namespace date;
-    const auto dp = date::floor<days>(tp);
-    const auto hms = make_time(tp - dp);
-    const auto ymd = year_month_day(dp);
-    u = ymd.month() / ymd.day();
-    h_ = hms.hours();
-    m_ = hms.minutes();
-    s_ = hms.seconds();
-}
-
-detail::MonthDayTime::MonthDayTime(const date::month_day& md, tz timezone)
-    : zone_(timezone)
-{
-    u = md;
-}
-
-date::day
-detail::MonthDayTime::day() const
-{
-    switch (type_)
-    {
-    case month_day:
-        return u.month_day_.day();
-    case month_last_dow:
-        return date::day{31};
-    case lteq:
-    case gteq:
-        break;
-    }
-    return u.month_day_weekday_.month_day_.day();
-}
-
-date::month
-detail::MonthDayTime::month() const
-{
-    switch (type_)
-    {
-    case month_day:
-        return u.month_day_.month();
-    case month_last_dow:
-        return u.month_weekday_last_.month();
-    case lteq:
-    case gteq:
-        break;
-    }
-    return u.month_day_weekday_.month_day_.month();
-}
-
-int
-detail::MonthDayTime::compare(date::year y, const MonthDayTime& x, date::year yx,
-                      std::chrono::seconds offset, std::chrono::minutes prev_save) const
-{
-    if (zone_ != x.zone_)
-    {
-        auto dp0 = to_sys_days(y);
-        auto dp1 = x.to_sys_days(yx);
-        if (std::abs((dp0-dp1).count()) > 1)
-            return dp0 < dp1 ? -1 : 1;
-        if (zone_ == tz::local)
-        {
-            auto tp0 = to_time_point(y) - prev_save;
-            if (x.zone_ == tz::utc)
-                tp0 -= offset;
-            auto tp1 = x.to_time_point(yx);
-            return tp0 < tp1 ? -1 : tp0 == tp1 ? 0 : 1;
-        }
-        else if (zone_ == tz::standard)
-        {
-            auto tp0 = to_time_point(y);
-            auto tp1 = x.to_time_point(yx);
-            if (x.zone_ == tz::local)
-                tp1 -= prev_save;
-            else
-                tp0 -= offset;
-            return tp0 < tp1 ? -1 : tp0 == tp1 ? 0 : 1;
-        }
-        // zone_ == tz::utc
-        auto tp0 = to_time_point(y);
-        auto tp1 = x.to_time_point(yx);
-        if (x.zone_ == tz::local)
-            tp1 -= offset + prev_save;
-        else
-            tp1 -= offset;
-        return tp0 < tp1 ? -1 : tp0 == tp1 ? 0 : 1;
-    }
-    auto const t0 = to_time_point(y);
-    auto const t1 = x.to_time_point(yx);
-    return t0 < t1 ? -1 : t0 == t1 ? 0 : 1;
-}
-
-sys_seconds
-detail::MonthDayTime::to_sys(date::year y, std::chrono::seconds offset,
-                     std::chrono::seconds save) const
-{
-    using namespace date;
-    using namespace std::chrono;
-    auto until_utc = to_time_point(y);
-    if (zone_ == tz::standard)
-        until_utc -= offset;
-    else if (zone_ == tz::local)
-        until_utc -= offset + save;
-    return until_utc;
-}
-
-detail::MonthDayTime::U&
-detail::MonthDayTime::U::operator=(const date::month_day& x)
-{
-    month_day_ = x;
-    return *this;
-}
-
-detail::MonthDayTime::U&
-detail::MonthDayTime::U::operator=(const date::month_weekday_last& x)
-{
-    month_weekday_last_ = x;
-    return *this;
-}
-
-detail::MonthDayTime::U&
-detail::MonthDayTime::U::operator=(const pair& x)
-{
-    month_day_weekday_ = x;
-    return *this;
-}
-
-date::sys_days
-detail::MonthDayTime::to_sys_days(date::year y) const
-{
-    using namespace std::chrono;
-    using namespace date;
-    switch (type_)
-    {
-    case month_day:
-        return sys_days(y/u.month_day_);
-    case month_last_dow:
-        return sys_days(y/u.month_weekday_last_);
-    case lteq:
-        {
-            auto const x = y/u.month_day_weekday_.month_day_;
-            auto const wd1 = weekday(static_cast<sys_days>(x));
-            auto const wd0 = u.month_day_weekday_.weekday_;
-            return sys_days(x) - (wd1-wd0);
-        }
-    case gteq:
-        break;
-    }
-    auto const x = y/u.month_day_weekday_.month_day_;
-    auto const wd1 = u.month_day_weekday_.weekday_;
-    auto const wd0 = weekday(static_cast<sys_days>(x));
-    return sys_days(x) + (wd1-wd0);
-}
-
-sys_seconds
-detail::MonthDayTime::to_time_point(date::year y) const
-{
-    // Add seconds first to promote to largest rep early to prevent overflow
-    return to_sys_days(y) + s_ + h_ + m_;
-}
-
-void
-detail::MonthDayTime::canonicalize(date::year y)
-{
-    using namespace std::chrono;
-    using namespace date;
-    switch (type_)
-    {
-    case month_day:
-        return;
-    case month_last_dow:
-        {
-            auto const ymd = year_month_day(sys_days(y/u.month_weekday_last_));
-            u.month_day_ = ymd.month()/ymd.day();
-            type_ = month_day;
-            return;
-        }
-    case lteq:
-        {
-            auto const x = y/u.month_day_weekday_.month_day_;
-            auto const wd1 = weekday(static_cast<sys_days>(x));
-            auto const wd0 = u.month_day_weekday_.weekday_;
-            auto const ymd = year_month_day(sys_days(x) - (wd1-wd0));
-            u.month_day_ = ymd.month()/ymd.day();
-            type_ = month_day;
-            return;
-        }
-    case gteq:
-        {
-            auto const x = y/u.month_day_weekday_.month_day_;
-            auto const wd1 = u.month_day_weekday_.weekday_;
-            auto const wd0 = weekday(static_cast<sys_days>(x));
-            auto const ymd = year_month_day(sys_days(x) + (wd1-wd0));
-            u.month_day_ = ymd.month()/ymd.day();
-            type_ = month_day;
-            return;
-        }
-    }
-}
-
-std::istream&
-detail::operator>>(std::istream& is, MonthDayTime& x)
-{
-    using namespace date;
-    using namespace std::chrono;
-    assert(((std::ios::failbit | std::ios::badbit) & is.exceptions()) ==
-            (std::ios::failbit | std::ios::badbit));
-    x = MonthDayTime{};
-    if (!is.eof() && ws(is) && !is.eof() && is.peek() != '#')
-    {
-        auto m = parse_month(is);
-        if (!is.eof() && ws(is) && !is.eof() && is.peek() != '#')
-        {
-            if (is.peek() == 'l')
-            {
-                for (int i = 0; i < 4; ++i)
-                    is.get();
-                auto dow = parse_dow(is);
-                x.type_ = MonthDayTime::month_last_dow;
-                x.u = date::month(m)/weekday(dow)[last];
-            }
-            else if (std::isalpha(is.peek()))
-            {
-                auto dow = parse_dow(is);
-                char c{};
-                is >> c;
-                if (c == '<' || c == '>')
-                {
-                    char c2{};
-                    is >> c2;
-                    if (c2 != '=')
-                        throw std::runtime_error(std::string("bad operator: ") + c + c2);
-                    int d;
-                    is >> d;
-                    if (d < 1 || d > 31)
-                        throw std::runtime_error(std::string("bad operator: ") + c + c2
-                                 + std::to_string(d));
-                    x.type_ = c == '<' ? MonthDayTime::lteq : MonthDayTime::gteq;
-                    x.u = MonthDayTime::pair{ date::month(m) / d, date::weekday(dow) };
-                }
-                else
-                    throw std::runtime_error(std::string("bad operator: ") + c);
-            }
-            else  // if (std::isdigit(is.peek())
-            {
-                int d;
-                is >> d;
-                if (d < 1 || d > 31)
-                    throw std::runtime_error(std::string("day of month: ")
-                             + std::to_string(d));
-                x.type_ = MonthDayTime::month_day;
-                x.u = date::month(m)/d;
-            }
-            if (!is.eof() && ws(is) && !is.eof() && is.peek() != '#')
-            {
-                int t;
-                is >> t;
-                x.h_ = hours{t};
-                if (!is.eof() && is.peek() == ':')
-                {
-                    is.get();
-                    is >> t;
-                    x.m_ = minutes{t};
-                    if (!is.eof() && is.peek() == ':')
-                    {
-                        is.get();
-                        is >> t;
-                        x.s_ = seconds{t};
-                    }
-                }
-                if (!is.eof() && std::isalpha(is.peek()))
-                {
-                    char c;
-                    is >> c;
-                    switch (c)
-                    {
-                    case 's':
-                        x.zone_ = tz::standard;
-                        break;
-                    case 'u':
-                        x.zone_ = tz::utc;
-                        break;
-                    }
-                }
-            }
-        }
-        else
-        {
-            x.u = month{m}/1;
-        }
-    }
-    return is;
-}
-
-std::ostream&
-detail::operator<<(std::ostream& os, const MonthDayTime& x)
-{
-    switch (x.type_)
-    {
-    case MonthDayTime::month_day:
-        os << x.u.month_day_ << "                  ";
-        break;
-    case MonthDayTime::month_last_dow:
-        os << x.u.month_weekday_last_ << "           ";
-        break;
-    case MonthDayTime::lteq:
-        os << x.u.month_day_weekday_.weekday_ << " on or before "
-           << x.u.month_day_weekday_.month_day_ << "  ";
-        break;
-    case MonthDayTime::gteq:
-        if ((static_cast<unsigned>(x.day()) - 1) % 7 == 0)
-        {
-            os << (x.u.month_day_weekday_.month_day_.month() /
-                   x.u.month_day_weekday_.weekday_[
-                       (static_cast<unsigned>(x.day()) - 1)/7+1]) << "              ";
-        }
-        else
-        {
-            os << x.u.month_day_weekday_.weekday_ << " on or after "
-               << x.u.month_day_weekday_.month_day_ << "  ";
-        }
-        break;
-    }
-    os << date::make_time(x.s_ + x.h_ + x.m_);
-    if (x.zone_ == tz::utc)
-        os << "UTC   ";
-    else if (x.zone_ == tz::standard)
-        os << "STD   ";
-    else
-        os << "      ";
-    return os;
-}
-
-// Rule
-
-detail::Rule::Rule(const std::string& s)
-{
-    try
-    {
-        using namespace date;
-        using namespace std::chrono;
-        std::istringstream in(s);
-        in.exceptions(std::ios::failbit | std::ios::badbit);
-        std::string word;
-        in >> word >> name_;
-        int x;
-        ws(in);
-        if (std::isalpha(in.peek()))
-        {
-            in >> word;
-            if (word == "min")
-            {
-                starting_year_ = year::min();
-            }
-            else
-                throw std::runtime_error("Didn't find expected word: " + word);
-        }
-        else
-        {
-            in >> x;
-            starting_year_ = year{x};
-        }
-        std::ws(in);
-        if (std::isalpha(in.peek()))
-        {
-            in >> word;
-            if (word == "only")
-            {
-                ending_year_ = starting_year_;
-            }
-            else if (word == "max")
-            {
-                ending_year_ = year::max();
-            }
-            else
-                throw std::runtime_error("Didn't find expected word: " + word);
-        }
-        else
-        {
-            in >> x;
-            ending_year_ = year{x};
-        }
-        in >> word;  // TYPE (always "-")
-        assert(word == "-");
-        in >> starting_at_;
-        save_ = duration_cast<minutes>(parse_signed_time(in));
-        in >> abbrev_;
-        if (abbrev_ == "-")
-            abbrev_.clear();
-        assert(hours{-1} <= save_ && save_ <= hours{2});
-    }
-    catch (...)
-    {
-        std::cerr << s << '\n';
-        std::cerr << *this << '\n';
-        throw;
-    }
-}
-
-detail::Rule::Rule(const Rule& r, date::year starting_year, date::year ending_year)
-    : name_(r.name_)
-    , starting_year_(starting_year)
-    , ending_year_(ending_year)
-    , starting_at_(r.starting_at_)
-    , save_(r.save_)
-    , abbrev_(r.abbrev_)
-{
-}
-
-bool
-detail::operator==(const Rule& x, const Rule& y)
-{
-    if (std::tie(x.name_, x.save_, x.starting_year_, x.ending_year_) ==
-        std::tie(y.name_, y.save_, y.starting_year_, y.ending_year_))
-        return x.month() == y.month() && x.day() == y.day();
-    return false;
-}
-
-bool
-detail::operator<(const Rule& x, const Rule& y)
-{
-    using namespace std::chrono;
-    auto const xm = x.month();
-    auto const ym = y.month();
-    if (std::tie(x.name_, x.starting_year_, xm, x.ending_year_) <
-        std::tie(y.name_, y.starting_year_, ym, y.ending_year_))
-        return true;
-    if (std::tie(x.name_, x.starting_year_, xm, x.ending_year_) >
-        std::tie(y.name_, y.starting_year_, ym, y.ending_year_))
-        return false;
-    return x.day() < y.day();
-}
-
-bool
-detail::operator==(const Rule& x, const date::year& y)
-{
-    return x.starting_year_ <= y && y <= x.ending_year_;
-}
-
-bool
-detail::operator<(const Rule& x, const date::year& y)
-{
-    return x.ending_year_ < y;
-}
-
-bool
-detail::operator==(const date::year& x, const Rule& y)
-{
-    return y.starting_year_ <= x && x <= y.ending_year_;
-}
-
-bool
-detail::operator<(const date::year& x, const Rule& y)
-{
-    return x < y.starting_year_;
-}
-
-bool
-detail::operator==(const Rule& x, const std::string& y)
-{
-    return x.name() == y;
-}
-
-bool
-detail::operator<(const Rule& x, const std::string& y)
-{
-    return x.name() < y;
-}
-
-bool
-detail::operator==(const std::string& x, const Rule& y)
-{
-    return y.name() == x;
-}
-
-bool
-detail::operator<(const std::string& x, const Rule& y)
-{
-    return x < y.name();
-}
-
-std::ostream&
-detail::operator<<(std::ostream& os, const Rule& r)
-{
-    using namespace date;
-    using namespace std::chrono;
-    detail::save_stream<char> _(os);
-    os.fill(' ');
-    os.flags(std::ios::dec | std::ios::left);
-    os.width(15);
-    os << r.name_;
-    os << r.starting_year_ << "    " << r.ending_year_ << "    ";
-    os << r.starting_at_;
-    if (r.save_ >= minutes{0})
-        os << ' ';
-    os << date::make_time(r.save_) << "   ";
-    os << r.abbrev_;
-    return os;
-}
-
-date::day
-detail::Rule::day() const
-{
-    return starting_at_.day();
-}
-
-date::month
-detail::Rule::month() const
-{
-    return starting_at_.month();
-}
-
-struct find_rule_by_name
-{
-    bool operator()(const Rule& x, const std::string& nm) const
-    {
-        return x.name() < nm;
-    }
-
-    bool operator()(const std::string& nm, const Rule& x) const
-    {
-        return nm < x.name();
-    }
-};
-
-bool
-detail::Rule::overlaps(const Rule& x, const Rule& y)
-{
-    // assume x.starting_year_ <= y.starting_year_;
-    if (!(x.starting_year_ <= y.starting_year_))
-    {
-        std::cerr << x << '\n';
-        std::cerr << y << '\n';
-        assert(x.starting_year_ <= y.starting_year_);
-    }
-    if (y.starting_year_ > x.ending_year_)
-        return false;
-    return !(x.starting_year_ == y.starting_year_ && x.ending_year_ == y.ending_year_);
-}
-
-void
-detail::Rule::split(std::vector<Rule>& rules, std::size_t i, std::size_t k, std::size_t& e)
-{
-    using namespace date;
-    using difference_type = std::vector<Rule>::iterator::difference_type;
-    // rules[i].starting_year_ <= rules[k].starting_year_ &&
-    //     rules[i].ending_year_ >= rules[k].starting_year_ &&
-    //     (rules[i].starting_year_ != rules[k].starting_year_ ||
-    //      rules[i].ending_year_ != rules[k].ending_year_)
-    assert(rules[i].starting_year_ <= rules[k].starting_year_ &&
-           rules[i].ending_year_ >= rules[k].starting_year_ &&
-           (rules[i].starting_year_ != rules[k].starting_year_ ||
-            rules[i].ending_year_ != rules[k].ending_year_));
-    if (rules[i].starting_year_ == rules[k].starting_year_)
-    {
-        if (rules[k].ending_year_ < rules[i].ending_year_)
-        {
-            rules.insert(rules.begin() + static_cast<difference_type>(k+1),
-                         Rule(rules[i], rules[k].ending_year_ + years{1},
-                              std::move(rules[i].ending_year_)));
-            ++e;
-            rules[i].ending_year_ = rules[k].ending_year_;
-        }
-        else  // rules[k].ending_year_ > rules[i].ending_year_
-        {
-            rules.insert(rules.begin() + static_cast<difference_type>(k+1),
-                         Rule(rules[k], rules[i].ending_year_ + years{1},
-                              std::move(rules[k].ending_year_)));
-            ++e;
-            rules[k].ending_year_ = rules[i].ending_year_;
-        }
-    }
-    else  // rules[i].starting_year_ < rules[k].starting_year_
-    {
-        if (rules[k].ending_year_ < rules[i].ending_year_)
-        {
-            rules.insert(rules.begin() + static_cast<difference_type>(k),
-                         Rule(rules[i], rules[k].starting_year_, rules[k].ending_year_));
-            ++k;
-            rules.insert(rules.begin() + static_cast<difference_type>(k+1),
-                         Rule(rules[i], rules[k].ending_year_ + years{1},
-                              std::move(rules[i].ending_year_)));
-            rules[i].ending_year_ = rules[k].starting_year_ - years{1};
-            e += 2;
-        }
-        else if (rules[k].ending_year_ > rules[i].ending_year_)
-        {
-            rules.insert(rules.begin() + static_cast<difference_type>(k),
-                         Rule(rules[i], rules[k].starting_year_, rules[i].ending_year_));
-            ++k;
-            rules.insert(rules.begin() + static_cast<difference_type>(k+1),
-                         Rule(rules[k], rules[i].ending_year_ + years{1},
-                         std::move(rules[k].ending_year_)));
-            e += 2;
-            rules[k].ending_year_ = std::move(rules[i].ending_year_);
-            rules[i].ending_year_ = rules[k].starting_year_ - years{1};
-        }
-        else  // rules[k].ending_year_ == rules[i].ending_year_
-        {
-            rules.insert(rules.begin() + static_cast<difference_type>(k),
-                         Rule(rules[i], rules[k].starting_year_,
-                         std::move(rules[i].ending_year_)));
-            ++k;
-            ++e;
-            rules[i].ending_year_ = rules[k].starting_year_ - years{1};
-        }
-    }
-}
-
-void
-detail::Rule::split_overlaps(std::vector<Rule>& rules, std::size_t i, std::size_t& e)
-{
-    using difference_type = std::vector<Rule>::iterator::difference_type;
-    auto j = i;
-    for (; i + 1 < e; ++i)
-    {
-        for (auto k = i + 1; k < e; ++k)
-        {
-            if (overlaps(rules[i], rules[k]))
-            {
-                split(rules, i, k, e);
-                std::sort(rules.begin() + static_cast<difference_type>(i),
-                          rules.begin() + static_cast<difference_type>(e));
-            }
-        }
-    }
-    for (; j < e; ++j)
-    {
-        if (rules[j].starting_year() == rules[j].ending_year())
-            rules[j].starting_at_.canonicalize(rules[j].starting_year());
-    }
-}
-
-void
-detail::Rule::split_overlaps(std::vector<Rule>& rules)
-{
-    using difference_type = std::vector<Rule>::iterator::difference_type;
-    for (std::size_t i = 0; i < rules.size();)
-    {
-        auto e = static_cast<std::size_t>(std::upper_bound(
-            rules.cbegin()+static_cast<difference_type>(i), rules.cend(), rules[i].name(),
-            [](const std::string& nm, const Rule& x)
-            {
-                return nm < x.name();
-            }) - rules.cbegin());
-        split_overlaps(rules, i, e);
-        auto first_rule = rules.begin() + static_cast<difference_type>(i);
-        auto last_rule = rules.begin() + static_cast<difference_type>(e);
-        auto t = std::lower_bound(first_rule, last_rule, min_year);
-        if (t > first_rule+1)
-        {
-            if (t == last_rule || t->starting_year() >= min_year)
-                --t;
-            auto d = static_cast<std::size_t>(t - first_rule);
-            rules.erase(first_rule, t);
-            e -= d;
-        }
-        first_rule = rules.begin() + static_cast<difference_type>(i);
-        last_rule = rules.begin() + static_cast<difference_type>(e);
-        t = std::upper_bound(first_rule, last_rule, max_year);
-        if (t != last_rule)
-        {
-            auto d = static_cast<std::size_t>(last_rule - t);
-            rules.erase(t, last_rule);
-            e -= d;
-        }
-        i = e;
-    }
-    rules.shrink_to_fit();
-}
-
-// Find the rule that comes chronologically before Rule r.  For multi-year rules,
-// y specifies which rules in r.  For single year rules, y is assumed to be equal
-// to the year specified by r.
-// Returns a pointer to the chronologically previous rule, and the year within
-// that rule.  If there is no previous rule, returns nullptr and year::min().
-// Preconditions:
-//     r->starting_year() <= y && y <= r->ending_year()
-static
-std::pair<const Rule*, date::year>
-find_previous_rule(const Rule* r, date::year y)
-{
-    using namespace date;
-    auto const& rules = get_tzdb().rules;
-    if (y == r->starting_year())
-    {
-        if (r == &rules.front() || r->name() != r[-1].name())
-            std::terminate();  // never called with first rule
-        --r;
-        if (y == r->starting_year())
-            return {r, y};
-        return {r, r->ending_year()};
-    }
-    if (r == &rules.front() || r->name() != r[-1].name() ||
-        r[-1].starting_year() < r->starting_year())
-    {
-        while (r < &rules.back() && r->name() == r[1].name() &&
-               r->starting_year() == r[1].starting_year())
-            ++r;
-        return {r, --y};
-    }
-    --r;
-    return {r, y};
-}
-
-// Find the rule that comes chronologically after Rule r.  For multi-year rules,
-// y specifies which rules in r.  For single year rules, y is assumed to be equal
-// to the year specified by r.
-// Returns a pointer to the chronologically next rule, and the year within
-// that rule.  If there is no next rule, return a pointer to a defaulted rule
-// and y+1.
-// Preconditions:
-//     first <= r && r < last && r->starting_year() <= y && y <= r->ending_year()
-//     [first, last) all have the same name
-static
-std::pair<const Rule*, date::year>
-find_next_rule(const Rule* first_rule, const Rule* last_rule, const Rule* r, date::year y)
-{
-    using namespace date;
-    if (y == r->ending_year())
-    {
-        if (r == last_rule-1)
-            return {nullptr, year::max()};
-        ++r;
-        if (y == r->ending_year())
-            return {r, y};
-        return {r, r->starting_year()};
-    }
-    if (r == last_rule-1 || r->ending_year() < r[1].ending_year())
-    {
-        while (r > first_rule && r->starting_year() == r[-1].starting_year())
-            --r;
-        return {r, ++y};
-    }
-    ++r;
-    return {r, y};
-}
-
-// Find the rule that comes chronologically after Rule r.  For multi-year rules,
-// y specifies which rules in r.  For single year rules, y is assumed to be equal
-// to the year specified by r.
-// Returns a pointer to the chronologically next rule, and the year within
-// that rule.  If there is no next rule, return nullptr and year::max().
-// Preconditions:
-//     r->starting_year() <= y && y <= r->ending_year()
-static
-std::pair<const Rule*, date::year>
-find_next_rule(const Rule* r, date::year y)
-{
-    using namespace date;
-    auto const& rules = get_tzdb().rules;
-    if (y == r->ending_year())
-    {
-        if (r == &rules.back() || r->name() != r[1].name())
-            return {nullptr, year::max()};
-        ++r;
-        if (y == r->ending_year())
-            return {r, y};
-        return {r, r->starting_year()};
-    }
-    if (r == &rules.back() || r->name() != r[1].name() ||
-        r->ending_year() < r[1].ending_year())
-    {
-        while (r > &rules.front() && r->name() == r[-1].name() &&
-               r->starting_year() == r[-1].starting_year())
-            --r;
-        return {r, ++y};
-    }
-    ++r;
-    return {r, y};
-}
-
-static
-const Rule*
-find_first_std_rule(const std::pair<const Rule*, const Rule*>& eqr)
-{
-    auto r = eqr.first;
-    auto ry = r->starting_year();
-    while (r->save() != std::chrono::minutes{0})
-    {
-        std::tie(r, ry) = find_next_rule(eqr.first, eqr.second, r, ry);
-        if (r == nullptr)
-            throw std::runtime_error("Could not find standard offset in rule "
-                                     + eqr.first->name());
-    }
-    return r;
-}
-
-static
-std::pair<const Rule*, date::year>
-find_rule_for_zone(const std::pair<const Rule*, const Rule*>& eqr,
-                   const date::year& y, const std::chrono::seconds& offset,
-                   const MonthDayTime& mdt)
-{
-    assert(eqr.first != nullptr);
-    assert(eqr.second != nullptr);
-
-    using namespace std::chrono;
-    using namespace date;
-    auto r = eqr.first;
-    auto ry = r->starting_year();
-    auto prev_save = minutes{0};
-    auto prev_year = year::min();
-    const Rule* prev_rule = nullptr;
-    while (r != nullptr)
-    {
-        if (mdt.compare(y, r->mdt(), ry, offset, prev_save) <= 0)
-            break;
-        prev_rule = r;
-        prev_year = ry;
-        prev_save = prev_rule->save();
-        std::tie(r, ry) = find_next_rule(eqr.first, eqr.second, r, ry);
-    }
-    return {prev_rule, prev_year};
-}
-
-static
-std::pair<const Rule*, date::year>
-find_rule_for_zone(const std::pair<const Rule*, const Rule*>& eqr,
-                   const sys_seconds& tp_utc,
-                   const local_seconds& tp_std,
-                   const local_seconds& tp_loc)
-{
-    using namespace std::chrono;
-    using namespace date;
-    auto r = eqr.first;
-    auto ry = r->starting_year();
-    auto prev_save = minutes{0};
-    auto prev_year = year::min();
-    const Rule* prev_rule = nullptr;
-    while (r != nullptr)
-    {
-        bool found = false;
-        switch (r->mdt().zone())
-        {
-        case tz::utc:
-            found = tp_utc < r->mdt().to_time_point(ry);
-            break;
-        case tz::standard:
-            found = sys_seconds{tp_std.time_since_epoch()} < r->mdt().to_time_point(ry);
-            break;
-        case tz::local:
-            found = sys_seconds{tp_loc.time_since_epoch()} < r->mdt().to_time_point(ry);
-            break;
-        }
-        if (found)
-            break;
-        prev_rule = r;
-        prev_year = ry;
-        prev_save = prev_rule->save();
-        std::tie(r, ry) = find_next_rule(eqr.first, eqr.second, r, ry);
-    }
-    return {prev_rule, prev_year};
-}
-
-static
-sys_info
-find_rule(const std::pair<const Rule*, date::year>& first_rule,
-          const std::pair<const Rule*, date::year>& last_rule,
-          const date::year& y, const std::chrono::seconds& offset,
-          const MonthDayTime& mdt, const std::chrono::minutes& initial_save,
-          const std::string& initial_abbrev)
-{
-    using namespace std::chrono;
-    using namespace date;
-    auto r = first_rule.first;
-    auto ry = first_rule.second;
-    sys_info x{sys_days(year::min()/min_day), sys_days(year::max()/max_day),
-               seconds{0}, initial_save, initial_abbrev};
-    while (r != nullptr)
-    {
-        auto tr = r->mdt().to_sys(ry, offset, x.save);
-        auto tx = mdt.to_sys(y, offset, x.save);
-        // Find last rule where tx >= tr
-        if (tx <= tr || (r == last_rule.first && ry == last_rule.second))
-        {
-            if (tx < tr && r == first_rule.first && ry == first_rule.second)
-            {
-                x.end = r->mdt().to_sys(ry, offset, x.save);
-                break;
-            }
-            if (tx < tr)
-            {
-                std::tie(r, ry) = find_previous_rule(r, ry);  // can't return nullptr for r
-                assert(r != nullptr);
-            }
-            // r != nullptr && tx >= tr (if tr were to be recomputed)
-            auto prev_save = initial_save;
-            if (!(r == first_rule.first && ry == first_rule.second))
-                prev_save = find_previous_rule(r, ry).first->save();
-            x.begin = r->mdt().to_sys(ry, offset, prev_save);
-            x.save = r->save();
-            x.abbrev = r->abbrev();
-            if (!(r == last_rule.first && ry == last_rule.second))
-            {
-                std::tie(r, ry) = find_next_rule(r, ry);  // can't return nullptr for r
-                assert(r != nullptr);
-                x.end = r->mdt().to_sys(ry, offset, x.save);
-            }
-            else
-                x.end = sys_days(year::max()/max_day);
-            break;
-        }
-        x.save = r->save();
-        std::tie(r, ry) = find_next_rule(r, ry);  // Can't return nullptr for r
-        assert(r != nullptr);
-    }
-    return x;
-}
-
-// zonelet
-
-detail::zonelet::~zonelet()
-{
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-    using minutes = std::chrono::minutes;
-    using string = std::string;
-    if (tag_ == has_save)
-        u.save_.~minutes();
-    else
-        u.rule_.~string();
-#endif
-}
-
-detail::zonelet::zonelet()
-{
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-    ::new(&u.rule_) std::string();
-#endif
-}
-
-detail::zonelet::zonelet(const zonelet& i)
-    : gmtoff_(i.gmtoff_)
-    , tag_(i.tag_)
-    , format_(i.format_)
-    , until_year_(i.until_year_)
-    , until_date_(i.until_date_)
-    , until_utc_(i.until_utc_)
-    , until_std_(i.until_std_)
-    , until_loc_(i.until_loc_)
-    , initial_save_(i.initial_save_)
-    , initial_abbrev_(i.initial_abbrev_)
-    , first_rule_(i.first_rule_)
-    , last_rule_(i.last_rule_)
-{
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-    if (tag_ == has_save)
-        ::new(&u.save_) std::chrono::minutes(i.u.save_);
-    else
-        ::new(&u.rule_) std::string(i.u.rule_);
-#else
-    if (tag_ == has_save)
-        u.save_ = i.u.save_;
-    else
-        u.rule_ = i.u.rule_;
-#endif
-}
-
-#endif  // !USE_OS_TZDB
-
-// time_zone
-
-#if USE_OS_TZDB
-
-time_zone::time_zone(const std::string& s, detail::undocumented)
-    : name_(s)
-    , adjusted_(new std::once_flag{})
-{
-}
-
-enum class endian
-{
-    native = __BYTE_ORDER__,
-    little = __ORDER_LITTLE_ENDIAN__,
-    big    = __ORDER_BIG_ENDIAN__
-};
-
-static
-inline
-std::uint32_t
-reverse_bytes(std::uint32_t i)
-{
-    return
-        (i & 0xff000000u) >> 24 |
-        (i & 0x00ff0000u) >> 8 |
-        (i & 0x0000ff00u) << 8 |
-        (i & 0x000000ffu) << 24;
-}
-
-static
-inline
-std::uint64_t
-reverse_bytes(std::uint64_t i)
-{
-    return
-        (i & 0xff00000000000000ull) >> 56 |
-        (i & 0x00ff000000000000ull) >> 40 |
-        (i & 0x0000ff0000000000ull) >> 24 |
-        (i & 0x000000ff00000000ull) >> 8 |
-        (i & 0x00000000ff000000ull) << 8 |
-        (i & 0x0000000000ff0000ull) << 24 |
-        (i & 0x000000000000ff00ull) << 40 |
-        (i & 0x00000000000000ffull) << 56;
-}
-
-template <class T>
-static
-inline
-void
-maybe_reverse_bytes(T&, std::false_type)
-{
-}
-
-static
-inline
-void
-maybe_reverse_bytes(std::int32_t& t, std::true_type)
-{
-    t = static_cast<std::int32_t>(reverse_bytes(static_cast<std::uint32_t>(t)));
-}
-
-static
-inline
-void
-maybe_reverse_bytes(std::int64_t& t, std::true_type)
-{
-    t = static_cast<std::int64_t>(reverse_bytes(static_cast<std::uint64_t>(t)));
-}
-
-template <class T>
-static
-inline
-void
-maybe_reverse_bytes(T& t)
-{
-    maybe_reverse_bytes(t, std::integral_constant<bool,
-                                                  endian::native == endian::little>{});
-}
-
-static
-void
-load_header(std::istream& inf)
-{
-    // Read TZif
-    auto t = inf.get();
-    auto z = inf.get();
-    auto i = inf.get();
-    auto f = inf.get();
-#ifndef NDEBUG
-    assert(t == 'T');
-    assert(z == 'Z');
-    assert(i == 'i');
-    assert(f == 'f');
-#else
-    (void)t;
-    (void)z;
-    (void)i;
-    (void)f;
-#endif
-}
-
-static
-unsigned char
-load_version(std::istream& inf)
-{
-    // Read version
-    auto v = inf.get();
-    assert(v != EOF);
-    return static_cast<unsigned char>(v);
-}
-
-static
-void
-skip_reserve(std::istream& inf)
-{
-    inf.ignore(15);
-}
-
-static
-void
-load_counts(std::istream& inf,
-            std::int32_t& tzh_ttisgmtcnt, std::int32_t& tzh_ttisstdcnt,
-            std::int32_t& tzh_leapcnt,    std::int32_t& tzh_timecnt,
-            std::int32_t& tzh_typecnt,    std::int32_t& tzh_charcnt)
-{
-    // Read counts;
-    inf.read(reinterpret_cast<char*>(&tzh_ttisgmtcnt), 4);
-    maybe_reverse_bytes(tzh_ttisgmtcnt);
-    inf.read(reinterpret_cast<char*>(&tzh_ttisstdcnt), 4);
-    maybe_reverse_bytes(tzh_ttisstdcnt);
-    inf.read(reinterpret_cast<char*>(&tzh_leapcnt), 4);
-    maybe_reverse_bytes(tzh_leapcnt);
-    inf.read(reinterpret_cast<char*>(&tzh_timecnt), 4);
-    maybe_reverse_bytes(tzh_timecnt);
-    inf.read(reinterpret_cast<char*>(&tzh_typecnt), 4);
-    maybe_reverse_bytes(tzh_typecnt);
-    inf.read(reinterpret_cast<char*>(&tzh_charcnt), 4);
-    maybe_reverse_bytes(tzh_charcnt);
-}
-
-template <class TimeType>
-static
-std::vector<detail::transition>
-load_transitions(std::istream& inf, std::int32_t tzh_timecnt)
-{
-    // Read transitions
-    using namespace std::chrono;
-    std::vector<detail::transition> transitions;
-    transitions.reserve(static_cast<unsigned>(tzh_timecnt));
-    for (std::int32_t i = 0; i < tzh_timecnt; ++i)
-    {
-        TimeType t;
-        inf.read(reinterpret_cast<char*>(&t), sizeof(t));
-        maybe_reverse_bytes(t);
-        transitions.emplace_back(sys_seconds{seconds{t}});
-        if (transitions.back().timepoint < min_seconds)
-            transitions.back().timepoint = min_seconds;
-    }
-    return transitions;
-}
-
-static
-std::vector<std::uint8_t>
-load_indices(std::istream& inf, std::int32_t tzh_timecnt)
-{
-    // Read indices
-    std::vector<std::uint8_t> indices;
-    indices.reserve(static_cast<unsigned>(tzh_timecnt));
-    for (std::int32_t i = 0; i < tzh_timecnt; ++i)
-    {
-        std::uint8_t t;
-        inf.read(reinterpret_cast<char*>(&t), sizeof(t));
-        indices.emplace_back(t);
-    }
-    return indices;
-}
-
-static
-std::vector<ttinfo>
-load_ttinfo(std::istream& inf, std::int32_t tzh_typecnt)
-{
-    // Read ttinfo
-    std::vector<ttinfo> ttinfos;
-    ttinfos.reserve(static_cast<unsigned>(tzh_typecnt));
-    for (std::int32_t i = 0; i < tzh_typecnt; ++i)
-    {
-        ttinfo t;
-        inf.read(reinterpret_cast<char*>(&t), 6);
-        maybe_reverse_bytes(t.tt_gmtoff);
-        ttinfos.emplace_back(t);
-    }
-    return ttinfos;
-}
-
-static
-std::string
-load_abbreviations(std::istream& inf, std::int32_t tzh_charcnt)
-{
-    // Read abbreviations
-    std::string abbrev;
-    abbrev.resize(static_cast<unsigned>(tzh_charcnt), '\0');
-    inf.read(&abbrev[0], tzh_charcnt);
-    return abbrev;
-}
-
-#if !MISSING_LEAP_SECONDS
-
-template <class TimeType>
-static
-std::vector<leap>
-load_leaps(std::istream& inf, std::int32_t tzh_leapcnt)
-{
-    // Read tzh_leapcnt pairs
-    using namespace std::chrono;
-    std::vector<leap> leap_seconds;
-    leap_seconds.reserve(tzh_leapcnt);
-    for (std::int32_t i = 0; i < tzh_leapcnt; ++i)
-    {
-        TimeType     t0;
-        std::int32_t t1;
-        inf.read(reinterpret_cast<char*>(&t0), sizeof(t0));
-        inf.read(reinterpret_cast<char*>(&t1), sizeof(t1));
-        maybe_reverse_bytes(t0);
-        maybe_reverse_bytes(t1);
-        leap_seconds.emplace_back(sys_seconds{seconds{t0 - (t1-1)}},
-                                  detail::undocumented{});
-    }
-    return leap_seconds;
-}
-
-template <class TimeType>
-static
-std::vector<leap>
-load_leap_data(std::istream& inf,
-               std::int32_t tzh_leapcnt, std::int32_t tzh_timecnt,
-               std::int32_t tzh_typecnt, std::int32_t tzh_charcnt)
-{
-    inf.ignore(tzh_timecnt*sizeof(TimeType) + tzh_timecnt + tzh_typecnt*6 + tzh_charcnt);
-    return load_leaps<TimeType>(inf, tzh_leapcnt);
-}
-
-static
-std::vector<leap>
-load_just_leaps(std::istream& inf)
-{
-    // Read tzh_leapcnt pairs
-    using namespace std::chrono;
-    load_header(inf);
-    auto v = load_version(inf);
-    std::int32_t tzh_ttisgmtcnt, tzh_ttisstdcnt, tzh_leapcnt,
-                 tzh_timecnt,    tzh_typecnt,    tzh_charcnt;
-    skip_reserve(inf);
-    load_counts(inf, tzh_ttisgmtcnt, tzh_ttisstdcnt, tzh_leapcnt,
-                     tzh_timecnt,    tzh_typecnt,    tzh_charcnt);
-    if (v == 0)
-        return load_leap_data<int32_t>(inf, tzh_leapcnt, tzh_timecnt, tzh_typecnt,
-                                       tzh_charcnt);
-#if !defined(NDEBUG)
-    inf.ignore((4+1)*tzh_timecnt + 6*tzh_typecnt + tzh_charcnt + 8*tzh_leapcnt +
-               tzh_ttisstdcnt + tzh_ttisgmtcnt);
-    load_header(inf);
-    auto v2 = load_version(inf);
-    assert(v == v2);
-    skip_reserve(inf);
-#else  // defined(NDEBUG)
-    inf.ignore((4+1)*tzh_timecnt + 6*tzh_typecnt + tzh_charcnt + 8*tzh_leapcnt +
-               tzh_ttisstdcnt + tzh_ttisgmtcnt + (4+1+15));
-#endif  // defined(NDEBUG)
-    load_counts(inf, tzh_ttisgmtcnt, tzh_ttisstdcnt, tzh_leapcnt,
-                     tzh_timecnt,    tzh_typecnt,    tzh_charcnt);
-    return load_leap_data<int64_t>(inf, tzh_leapcnt, tzh_timecnt, tzh_typecnt,
-                                   tzh_charcnt);
-}
-
-#endif  // !MISSING_LEAP_SECONDS
-
-template <class TimeType>
-void
-time_zone::load_data(std::istream& inf,
-                     std::int32_t tzh_leapcnt, std::int32_t tzh_timecnt,
-                     std::int32_t tzh_typecnt, std::int32_t tzh_charcnt)
-{
-    using namespace std::chrono;
-    transitions_ = load_transitions<TimeType>(inf, tzh_timecnt);
-    auto indices = load_indices(inf, tzh_timecnt);
-    auto infos = load_ttinfo(inf, tzh_typecnt);
-    auto abbrev = load_abbreviations(inf, tzh_charcnt);
-#if !MISSING_LEAP_SECONDS
-    auto& leap_seconds = get_tzdb_list().front().leaps;
-    if (leap_seconds.empty() && tzh_leapcnt > 0)
-        leap_seconds = load_leaps<TimeType>(inf, tzh_leapcnt);
-#endif
-    ttinfos_.reserve(infos.size());
-    for (auto& info : infos)
-    {
-        ttinfos_.push_back({seconds{info.tt_gmtoff},
-                            abbrev.c_str() + info.tt_abbrind,
-                            info.tt_isdst != 0});
-    }
-    auto i = 0u;
-    if (transitions_.empty() || transitions_.front().timepoint != min_seconds)
-    {
-        transitions_.emplace(transitions_.begin(), min_seconds);
-        auto tf = std::find_if(ttinfos_.begin(), ttinfos_.end(),
-                               [](const expanded_ttinfo& ti)
-                                   {return ti.is_dst == 0;});
-        if (tf == ttinfos_.end())
-            tf = ttinfos_.begin();
-        transitions_[i].info = &*tf;
-        ++i;
-    }
-    for (auto j = 0u; i < transitions_.size(); ++i, ++j)
-        transitions_[i].info = ttinfos_.data() + indices[j];
-}
-
-void
-time_zone::init_impl()
-{
-    using namespace std;
-    using namespace std::chrono;
-    auto name = get_tz_dir() + ('/' + name_);
-    std::ifstream inf(name);
-    if (!inf.is_open())
-        throw std::runtime_error{"Unable to open " + name};
-    inf.exceptions(std::ios::failbit | std::ios::badbit);
-    load_header(inf);
-    auto v = load_version(inf);
-    std::int32_t tzh_ttisgmtcnt, tzh_ttisstdcnt, tzh_leapcnt,
-                 tzh_timecnt,    tzh_typecnt,    tzh_charcnt;
-    skip_reserve(inf);
-    load_counts(inf, tzh_ttisgmtcnt, tzh_ttisstdcnt, tzh_leapcnt,
-                     tzh_timecnt,    tzh_typecnt,    tzh_charcnt);
-    if (v == 0)
-    {
-        load_data<int32_t>(inf, tzh_leapcnt, tzh_timecnt, tzh_typecnt, tzh_charcnt);
-    }
-    else
-    {
-#if !defined(NDEBUG)
-        inf.ignore((4+1)*tzh_timecnt + 6*tzh_typecnt + tzh_charcnt + 8*tzh_leapcnt +
-                   tzh_ttisstdcnt + tzh_ttisgmtcnt);
-        load_header(inf);
-        auto v2 = load_version(inf);
-        assert(v == v2);
-        skip_reserve(inf);
-#else  // defined(NDEBUG)
-        inf.ignore((4+1)*tzh_timecnt + 6*tzh_typecnt + tzh_charcnt + 8*tzh_leapcnt +
-                   tzh_ttisstdcnt + tzh_ttisgmtcnt + (4+1+15));
-#endif  // defined(NDEBUG)
-        load_counts(inf, tzh_ttisgmtcnt, tzh_ttisstdcnt, tzh_leapcnt,
-                         tzh_timecnt,    tzh_typecnt,    tzh_charcnt);
-        load_data<int64_t>(inf, tzh_leapcnt, tzh_timecnt, tzh_typecnt, tzh_charcnt);
-    }
-#if !MISSING_LEAP_SECONDS
-    if (tzh_leapcnt > 0)
-    {
-        auto& leap_seconds = get_tzdb_list().front().leaps;
-        auto itr = leap_seconds.begin();
-        auto l = itr->date();
-        seconds leap_count{0};
-        for (auto t = std::upper_bound(transitions_.begin(), transitions_.end(), l,
-                                       [](const sys_seconds& x, const transition& ct)
-                                       {
-                                           return x < ct.timepoint;
-                                       });
-                  t != transitions_.end(); ++t)
-        {
-            while (t->timepoint >= l)
-            {
-                ++leap_count;
-                if (++itr == leap_seconds.end())
-                    l = sys_days(max_year/max_day);
-                else
-                    l = itr->date() + leap_count;
-            }
-            t->timepoint -= leap_count;
-        }
-    }
-#endif  // !MISSING_LEAP_SECONDS
-    auto b = transitions_.begin();
-    auto i = transitions_.end();
-    if (i != b)
-    {
-        for (--i; i != b; --i)
-        {
-            if (i->info->offset == i[-1].info->offset &&
-                i->info->abbrev == i[-1].info->abbrev &&
-                i->info->is_dst == i[-1].info->is_dst)
-                i = transitions_.erase(i);
-        }
-    }
-}
-
-void
-time_zone::init() const
-{
-    std::call_once(*adjusted_, [this]() {const_cast<time_zone*>(this)->init_impl();});
-}
-
-sys_info
-time_zone::load_sys_info(std::vector<detail::transition>::const_iterator i) const
-{
-    using namespace std::chrono;
-    assert(!transitions_.empty());
-    assert(i != transitions_.begin());
-    sys_info r;
-    r.begin = i[-1].timepoint;
-    r.end = i != transitions_.end() ? i->timepoint :
-                                      sys_seconds(sys_days(year::max()/max_day));
-    r.offset = i[-1].info->offset;
-    r.save = i[-1].info->is_dst ? minutes{1} : minutes{0};
-    r.abbrev = i[-1].info->abbrev;
-    return r;
-}
-
-sys_info
-time_zone::get_info_impl(sys_seconds tp) const
-{
-    using namespace std;
-    init();
-    return load_sys_info(upper_bound(transitions_.begin(), transitions_.end(), tp,
-                                     [](const sys_seconds& x, const transition& t)
-                                     {
-                                         return x < t.timepoint;
-                                     }));
-}
-
-local_info
-time_zone::get_info_impl(local_seconds tp) const
-{
-    using namespace std::chrono;
-    init();
-    local_info i;
-    i.result = local_info::unique;
-    auto tr = upper_bound(transitions_.begin(), transitions_.end(), tp,
-                          [](const local_seconds& x, const transition& t)
-                          {
-                              return sys_seconds{x.time_since_epoch()} -
-                                                         t.info->offset < t.timepoint;
-                          });
-    i.first = load_sys_info(tr);
-    auto tps = sys_seconds{(tp - i.first.offset).time_since_epoch()};
-    if (tps < i.first.begin + days{1} && tr != transitions_.begin())
-    {
-        i.second = load_sys_info(--tr);
-        tps = sys_seconds{(tp - i.second.offset).time_since_epoch()};
-        if (tps < i.second.end)
-        {
-           i.result = local_info::ambiguous;
-           std::swap(i.first, i.second);
-        }
-        else
-        {
-            i.second = {};
-        }
-    }
-    else if (tps >= i.first.end && tr != transitions_.end())
-    {
-        i.second = load_sys_info(++tr);
-        tps = sys_seconds{(tp - i.second.offset).time_since_epoch()};
-        if (tps < i.second.begin)
-            i.result = local_info::nonexistent;
-        else
-            i.second = {};
-    }
-    return i;
-}
-
-std::ostream&
-operator<<(std::ostream& os, const time_zone& z)
-{
-    using namespace std::chrono;
-    z.init();
-    os << z.name_ << '\n';
-    os << "Initially:           ";
-    auto const& t = z.transitions_.front();
-    if (t.info->offset >= seconds{0})
-        os << '+';
-    os << make_time(t.info->offset);
-    if (t.info->is_dst > 0)
-        os << " daylight ";
-    else
-        os << " standard ";
-    os << t.info->abbrev << '\n';
-    for (auto i = std::next(z.transitions_.cbegin()); i < z.transitions_.cend(); ++i)
-        os << *i << '\n';
-    return os;
-}
-
-#if !MISSING_LEAP_SECONDS
-
-leap::leap(const sys_seconds& s, detail::undocumented)
-    : date_(s)
-{
-}
-
-#endif  // !MISSING_LEAP_SECONDS
-
-#else  // !USE_OS_TZDB
-
-time_zone::time_zone(const std::string& s, detail::undocumented)
-    : adjusted_(new std::once_flag{})
-{
-    try
-    {
-        using namespace date;
-        std::istringstream in(s);
-        in.exceptions(std::ios::failbit | std::ios::badbit);
-        std::string word;
-        in >> word >> name_;
-        parse_info(in);
-    }
-    catch (...)
-    {
-        std::cerr << s << '\n';
-        std::cerr << *this << '\n';
-        zonelets_.pop_back();
-        throw;
-    }
-}
-
-sys_info
-time_zone::get_info_impl(sys_seconds tp) const
-{
-    return get_info_impl(tp, static_cast<int>(tz::utc));
-}
-
-local_info
-time_zone::get_info_impl(local_seconds tp) const
-{
-    using namespace std::chrono;
-    local_info i{};
-    i.first = get_info_impl(sys_seconds{tp.time_since_epoch()}, static_cast<int>(tz::local));
-    auto tps = sys_seconds{(tp - i.first.offset).time_since_epoch()};
-    if (tps < i.first.begin)
-    {
-        i.second = std::move(i.first);
-        i.first = get_info_impl(i.second.begin - seconds{1}, static_cast<int>(tz::utc));
-        i.result = local_info::nonexistent;
-    }
-    else if (i.first.end - tps <= days{1})
-    {
-        i.second = get_info_impl(i.first.end, static_cast<int>(tz::utc));
-        tps = sys_seconds{(tp - i.second.offset).time_since_epoch()};
-        if (tps >= i.second.begin)
-            i.result = local_info::ambiguous;
-        else
-            i.second = {};
-    }
-    return i;
-}
-
-void
-time_zone::add(const std::string& s)
-{
-    try
-    {
-        std::istringstream in(s);
-        in.exceptions(std::ios::failbit | std::ios::badbit);
-        ws(in);
-        if (!in.eof() && in.peek() != '#')
-            parse_info(in);
-    }
-    catch (...)
-    {
-        std::cerr << s << '\n';
-        std::cerr << *this << '\n';
-        zonelets_.pop_back();
-        throw;
-    }
-}
-
-void
-time_zone::parse_info(std::istream& in)
-{
-    using namespace date;
-    using namespace std::chrono;
-    zonelets_.emplace_back();
-    auto& zonelet = zonelets_.back();
-    zonelet.gmtoff_ = parse_signed_time(in);
-    in >> zonelet.u.rule_;
-    if (zonelet.u.rule_ == "-")
-        zonelet.u.rule_.clear();
-    in >> zonelet.format_;
-    if (!in.eof())
-        ws(in);
-    if (in.eof() || in.peek() == '#')
-    {
-        zonelet.until_year_ = year::max();
-        zonelet.until_date_ = MonthDayTime(max_day, tz::utc);
-    }
-    else
-    {
-        int y;
-        in >> y;
-        zonelet.until_year_ = year{y};
-        in >> zonelet.until_date_;
-        zonelet.until_date_.canonicalize(zonelet.until_year_);
-    }
-    if ((zonelet.until_year_ < min_year) ||
-            (zonelets_.size() > 1 && zonelets_.end()[-2].until_year_ > max_year))
-        zonelets_.pop_back();
-}
-
-void
-time_zone::adjust_infos(const std::vector<Rule>& rules)
-{
-    using namespace std::chrono;
-    using namespace date;
-    const zonelet* prev_zonelet = nullptr;
-    for (auto& z : zonelets_)
-    {
-        std::pair<const Rule*, const Rule*> eqr{};
-        std::istringstream in;
-        in.exceptions(std::ios::failbit | std::ios::badbit);
-        // Classify info as rule-based, has save, or neither
-        if (!z.u.rule_.empty())
-        {
-            // Find out if this zonelet has a rule or a save
-            eqr = std::equal_range(rules.data(), rules.data() + rules.size(), z.u.rule_);
-            if (eqr.first == eqr.second)
-            {
-                // The rule doesn't exist.  Assume this is a save
-                try
-                {
-                    using namespace std::chrono;
-                    using string = std::string;
-                    in.str(z.u.rule_);
-                    auto tmp = duration_cast<minutes>(parse_signed_time(in));
-#if !defined(_MSC_VER) || (_MSC_VER >= 1900)
-                    z.u.rule_.~string();
-                    z.tag_ = zonelet::has_save;
-                    ::new(&z.u.save_) minutes(tmp);
-#else
-                    z.u.rule_.clear();
-                    z.tag_ = zonelet::has_save;
-                    z.u.save_ = tmp;
-#endif
-                }
-                catch (...)
-                {
-                    std::cerr << name_ << " : " << z.u.rule_ << '\n';
-                    throw;
-                }
-            }
-        }
-        else
-        {
-            // This zone::zonelet has no rule and no save
-            z.tag_ = zonelet::is_empty;
-        }
-
-        minutes final_save{0};
-        if (z.tag_ == zonelet::has_save)
-        {
-            final_save = z.u.save_;
-        }
-        else if (z.tag_ == zonelet::has_rule)
-        {
-            z.last_rule_ = find_rule_for_zone(eqr, z.until_year_, z.gmtoff_,
-                                              z.until_date_);
-            if (z.last_rule_.first != nullptr)
-                final_save = z.last_rule_.first->save();
-        }
-        z.until_utc_ = z.until_date_.to_sys(z.until_year_, z.gmtoff_, final_save);
-        z.until_std_ = local_seconds{z.until_utc_.time_since_epoch()} + z.gmtoff_;
-        z.until_loc_ = z.until_std_ + final_save;
-
-        if (z.tag_ == zonelet::has_rule)
-        {
-            if (prev_zonelet != nullptr)
-            {
-                z.first_rule_ = find_rule_for_zone(eqr, prev_zonelet->until_utc_,
-                                                        prev_zonelet->until_std_,
-                                                        prev_zonelet->until_loc_);
-                if (z.first_rule_.first != nullptr)
-                {
-                    z.initial_save_ = z.first_rule_.first->save();
-                    z.initial_abbrev_ = z.first_rule_.first->abbrev();
-                    if (z.first_rule_ != z.last_rule_)
-                    {
-                        z.first_rule_ = find_next_rule(eqr.first, eqr.second,
-                                                       z.first_rule_.first,
-                                                       z.first_rule_.second);
-                    }
-                    else
-                    {
-                        z.first_rule_ = std::make_pair(nullptr, year::min());
-                        z.last_rule_ = std::make_pair(nullptr, year::max());
-                    }
-                }
-            }
-            if (z.first_rule_.first == nullptr && z.last_rule_.first != nullptr)
-            {
-                z.first_rule_ = std::make_pair(eqr.first, eqr.first->starting_year());
-                z.initial_abbrev_ = find_first_std_rule(eqr)->abbrev();
-            }
-        }
-
-#ifndef NDEBUG
-        if (z.first_rule_.first == nullptr)
-        {
-            assert(z.first_rule_.second == year::min());
-            assert(z.last_rule_.first == nullptr);
-            assert(z.last_rule_.second == year::max());
-        }
-        else
-        {
-            assert(z.last_rule_.first != nullptr);
-        }
-#endif
-        prev_zonelet = &z;
-    }
-}
-
-static
-std::string
-format_abbrev(std::string format, const std::string& variable, std::chrono::seconds off,
-                                                               std::chrono::minutes save)
-{
-    using namespace std::chrono;
-    auto k = format.find("%s");
-    if (k != std::string::npos)
-    {
-        format.replace(k, 2, variable);
-    }
-    else
-    {
-        k = format.find('/');
-        if (k != std::string::npos)
-        {
-            if (save == minutes{0})
-                format.erase(k);
-            else
-                format.erase(0, k+1);
-        }
-        else
-        {
-            k = format.find("%z");
-            if (k != std::string::npos)
-            {
-                std::string temp;
-                if (off < seconds{0})
-                {
-                    temp = '-';
-                    off = -off;
-                }
-                else
-                    temp = '+';
-                auto h = date::floor<hours>(off);
-                off -= h;
-                if (h < hours{10})
-                    temp += '0';
-                temp += std::to_string(h.count());
-                if (off > seconds{0})
-                {
-                    auto m = date::floor<minutes>(off);
-                    off -= m;
-                    if (m < minutes{10})
-                        temp += '0';
-                    temp += std::to_string(m.count());
-                    if (off > seconds{0})
-                    {
-                        if (off < seconds{10})
-                            temp += '0';
-                        temp += std::to_string(off.count());
-                    }
-                }
-                format.replace(k, 2, temp);
-            }
-        }
-    }
-    return format;
-}
-
-sys_info
-time_zone::get_info_impl(sys_seconds tp, int tz_int) const
-{
-    using namespace std::chrono;
-    using namespace date;
-    tz timezone = static_cast<tz>(tz_int);
-    assert(timezone != tz::standard);
-    auto y = year_month_day(floor<days>(tp)).year();
-    if (y < min_year || y > max_year)
-        throw std::runtime_error("The year " + std::to_string(static_cast<int>(y)) +
-            " is out of range:[" + std::to_string(static_cast<int>(min_year)) + ", "
-                                 + std::to_string(static_cast<int>(max_year)) + "]");
-    std::call_once(*adjusted_,
-                   [this]()
-                   {
-                       const_cast<time_zone*>(this)->adjust_infos(get_tzdb().rules);
-                   });
-    auto i = std::upper_bound(zonelets_.begin(), zonelets_.end(), tp,
-        [timezone](sys_seconds t, const zonelet& zl)
-        {
-            return timezone == tz::utc ? t < zl.until_utc_ :
-                                         t < sys_seconds{zl.until_loc_.time_since_epoch()};
-        });
-
-    sys_info r{};
-    if (i != zonelets_.end())
-    {
-        if (i->tag_ == zonelet::has_save)
-        {
-            if (i != zonelets_.begin())
-                r.begin = i[-1].until_utc_;
-            else
-                r.begin = sys_days(year::min()/min_day);
-            r.end = i->until_utc_;
-            r.offset = i->gmtoff_ + i->u.save_;
-            r.save = i->u.save_;
-        }
-        else if (i->u.rule_.empty())
-        {
-            if (i != zonelets_.begin())
-                r.begin = i[-1].until_utc_;
-            else
-                r.begin = sys_days(year::min()/min_day);
-            r.end = i->until_utc_;
-            r.offset = i->gmtoff_;
-        }
-        else
-        {
-            r = find_rule(i->first_rule_, i->last_rule_, y, i->gmtoff_,
-                          MonthDayTime(local_seconds{tp.time_since_epoch()}, timezone),
-                          i->initial_save_, i->initial_abbrev_);
-            r.offset = i->gmtoff_ + r.save;
-            if (i != zonelets_.begin() && r.begin < i[-1].until_utc_)
-                r.begin = i[-1].until_utc_;
-            if (r.end > i->until_utc_)
-                r.end = i->until_utc_;
-        }
-        r.abbrev = format_abbrev(i->format_, r.abbrev, r.offset, r.save);
-        assert(r.begin < r.end);
-    }
-    return r;
-}
-
-std::ostream&
-operator<<(std::ostream& os, const time_zone& z)
-{
-    using namespace date;
-    using namespace std::chrono;
-    detail::save_stream<char> _(os);
-    os.fill(' ');
-    os.flags(std::ios::dec | std::ios::left);
-    std::call_once(*z.adjusted_,
-                   [&z]()
-                   {
-                       const_cast<time_zone&>(z).adjust_infos(get_tzdb().rules);
-                   });
-    os.width(35);
-    os << z.name_;
-    std::string indent;
-    for (auto const& s : z.zonelets_)
-    {
-        os << indent;
-        if (s.gmtoff_ >= seconds{0})
-            os << ' ';
-        os << make_time(s.gmtoff_) << "   ";
-        os.width(15);
-        if (s.tag_ != zonelet::has_save)
-            os << s.u.rule_;
-        else
-        {
-            std::ostringstream tmp;
-            tmp << make_time(s.u.save_);
-            os <<  tmp.str();
-        }
-        os.width(8);
-        os << s.format_ << "   ";
-        os << s.until_year_ << ' ' << s.until_date_;
-        os << "   " << s.until_utc_ << " UTC";
-        os << "   " << s.until_std_ << " STD";
-        os << "   " << s.until_loc_;
-        os << "   " << make_time(s.initial_save_);
-        os << "   " << s.initial_abbrev_;
-        if (s.first_rule_.first != nullptr)
-            os << "   {" << *s.first_rule_.first << ", " << s.first_rule_.second << '}';
-        else
-            os << "   {" << "nullptr" << ", " << s.first_rule_.second << '}';
-        if (s.last_rule_.first != nullptr)
-            os << "   {" << *s.last_rule_.first << ", " << s.last_rule_.second << '}';
-        else
-            os << "   {" << "nullptr" << ", " << s.last_rule_.second << '}';
-        os << '\n';
-        if (indent.empty())
-            indent = std::string(35, ' ');
-    }
-    return os;
-}
-
-#endif  // !USE_OS_TZDB
-
-#if !MISSING_LEAP_SECONDS
-
-std::ostream&
-operator<<(std::ostream& os, const leap& x)
-{
-    using namespace date;
-    return os << x.date_ << "  +";
-}
-
-#endif  // !MISSING_LEAP_SECONDS
-
-#if USE_OS_TZDB
-
-# ifdef __APPLE__
-static
-std::string
-get_version()
-{
-    using namespace std;
-    auto path = get_tz_dir() + string("/+VERSION");
-    ifstream in{path};
-    string version;
-    in >> version;
-    if (in.fail())
-        throw std::runtime_error("Unable to get Timezone database version from " + path);
-    return version;
-}
-# endif
-
-static
-std::unique_ptr<tzdb>
-init_tzdb()
-{
-    std::unique_ptr<tzdb> db(new tzdb);
-
-    //Iterate through folders
-    std::queue<std::string> subfolders;
-    subfolders.emplace(get_tz_dir());
-    struct dirent* d;
-    struct stat s;
-    while (!subfolders.empty())
-    {
-        auto dirname = std::move(subfolders.front());
-        subfolders.pop();
-        auto dir = opendir(dirname.c_str());
-        if (!dir)
-            continue;
-        while ((d = readdir(dir)) != nullptr)
-        {
-            // Ignore these files:
-            if (d->d_name[0]                      == '.'    || // curdir, prevdir, hidden
-                memcmp(d->d_name, "posix", 5)     == 0      || // starts with posix
-                strcmp(d->d_name, "Factory")      == 0      ||
-                strcmp(d->d_name, "iso3166.tab")  == 0      ||
-                strcmp(d->d_name, "right")        == 0      ||
-                strcmp(d->d_name, "+VERSION")     == 0      ||
-                strcmp(d->d_name, "zone.tab")     == 0      ||
-                strcmp(d->d_name, "zone1970.tab") == 0      ||
-                strcmp(d->d_name, "leap-seconds.list") == 0   )
-                continue;
-            auto subname = dirname + folder_delimiter + d->d_name;
-            if(stat(subname.c_str(), &s) == 0)
-            {
-                if(S_ISDIR(s.st_mode))
-                {
-                    if(!S_ISLNK(s.st_mode))
-                    {
-                        subfolders.push(subname);
-                    }
-                }
-                else
-                {
-                    db->zones.emplace_back(subname.substr(get_tz_dir().size()+1),
-                                           detail::undocumented{});
-                }
-            }
-        }
-        closedir(dir);
-    }
-    db->zones.shrink_to_fit();
-    std::sort(db->zones.begin(), db->zones.end());
-#  if !MISSING_LEAP_SECONDS
-    std::ifstream in(get_tz_dir() + std::string(1, folder_delimiter) + "right/UTC",
-                     std::ios_base::binary);
-    if (in)
-    {
-        in.exceptions(std::ios::failbit | std::ios::badbit);
-        db->leaps = load_just_leaps(in);
-    }
-    else
-    {
-        in.clear();
-        in.open(get_tz_dir() + std::string(1, folder_delimiter) +
-                "UTC", std::ios_base::binary);
-        if (!in)
-            throw std::runtime_error("Unable to extract leap second information");
-        in.exceptions(std::ios::failbit | std::ios::badbit);
-        db->leaps = load_just_leaps(in);
-    }
-#  endif  // !MISSING_LEAP_SECONDS
-#  ifdef __APPLE__
-    db->version = get_version();
-#  endif
-    return db;
-}
-
-#else  // !USE_OS_TZDB
-
-// link
-
-link::link(const std::string& s)
-{
-    using namespace date;
-    std::istringstream in(s);
-    in.exceptions(std::ios::failbit | std::ios::badbit);
-    std::string word;
-    in >> word >> target_ >> name_;
-}
-
-std::ostream&
-operator<<(std::ostream& os, const link& x)
-{
-    using namespace date;
-    detail::save_stream<char> _(os);
-    os.fill(' ');
-    os.flags(std::ios::dec | std::ios::left);
-    os.width(35);
-    return os << x.name_ << " --> " << x.target_;
-}
-
-// leap
-
-leap::leap(const std::string& s, detail::undocumented)
-{
-    using namespace date;
-    std::istringstream in(s);
-    in.exceptions(std::ios::failbit | std::ios::badbit);
-    std::string word;
-    int y;
-    MonthDayTime date;
-    in >> word >> y >> date;
-    date_ = date.to_time_point(year(y));
-}
-
-static
-bool
-file_exists(const std::string& filename)
-{
-#ifdef _WIN32
-    return ::_access(filename.c_str(), 0) == 0;
-#else
-    return ::access(filename.c_str(), F_OK) == 0;
-#endif
-}
-
-#if HAS_REMOTE_API
-
-// CURL tools
-
-static
-int
-curl_global()
-{
-    if (::curl_global_init(CURL_GLOBAL_DEFAULT) != 0)
-        throw std::runtime_error("CURL global initialization failed");
-    return 0;
-}
-
-namespace
-{
-
-struct curl_deleter
-{
-    void operator()(CURL* p) const
-    {
-        ::curl_easy_cleanup(p);
-    }
-};
-
-}  // unnamed namespace
-
-static
-std::unique_ptr<CURL, curl_deleter>
-curl_init()
-{
-    static const auto curl_is_now_initiailized = curl_global();
-    (void)curl_is_now_initiailized;
-    return std::unique_ptr<CURL, curl_deleter>{::curl_easy_init()};
-}
-
-static
-bool
-download_to_string(const std::string& url, std::string& str)
-{
-    str.clear();
-    auto curl = curl_init();
-    if (!curl)
-        return false;
-    std::string version;
-    curl_easy_setopt(curl.get(), CURLOPT_URL, url.c_str());
-    curl_write_callback write_cb = [](char* contents, std::size_t size, std::size_t nmemb,
-                                      void* userp) -> std::size_t
-    {
-        auto& userstr = *static_cast<std::string*>(userp);
-        auto realsize = size * nmemb;
-        userstr.append(contents, realsize);
-        return realsize;
-    };
-    curl_easy_setopt(curl.get(), CURLOPT_WRITEFUNCTION, write_cb);
-    curl_easy_setopt(curl.get(), CURLOPT_WRITEDATA, &str);
-    curl_easy_setopt(curl.get(), CURLOPT_SSL_VERIFYPEER, false);
-    auto res = curl_easy_perform(curl.get());
-    return (res == CURLE_OK);
-}
-
-namespace
-{
-    enum class download_file_options { binary, text };
-}
-
-static
-bool
-download_to_file(const std::string& url, const std::string& local_filename,
-                 download_file_options opts)
-{
-    auto curl = curl_init();
-    if (!curl)
-        return false;
-    curl_easy_setopt(curl.get(), CURLOPT_URL, url.c_str());
-    curl_easy_setopt(curl.get(), CURLOPT_SSL_VERIFYPEER, false);
-    curl_write_callback write_cb = [](char* contents, std::size_t size, std::size_t nmemb,
-                                      void* userp) -> std::size_t
-    {
-        auto& of = *static_cast<std::ofstream*>(userp);
-        auto realsize = size * nmemb;
-        of.write(contents, static_cast<std::streamsize>(realsize));
-        return realsize;
-    };
-    curl_easy_setopt(curl.get(), CURLOPT_WRITEFUNCTION, write_cb);
-    decltype(curl_easy_perform(curl.get())) res;
-    {
-        std::ofstream of(local_filename,
-                         opts == download_file_options::binary ?
-                             std::ofstream::out | std::ofstream::binary :
-                             std::ofstream::out);
-        of.exceptions(std::ios::badbit);
-        curl_easy_setopt(curl.get(), CURLOPT_WRITEDATA, &of);
-        res = curl_easy_perform(curl.get());
-    }
-    return res == CURLE_OK;
-}
-
-std::string
-remote_version()
-{
-    std::string version;
-    std::string str;
-    if (download_to_string("https://www.iana.org/time-zones", str))
-    {
-        CONSTDATA char db[] = "/time-zones/releases/tzdata";
-        CONSTDATA auto db_size = sizeof(db) - 1;
-        auto p = str.find(db, 0, db_size);
-        const int ver_str_len = 5;
-        if (p != std::string::npos && p + (db_size + ver_str_len) <= str.size())
-            version = str.substr(p + db_size, ver_str_len);
-    }
-    return version;
-}
-
-
-// TODO! Using system() create a process and a console window.
-// This is useful to see what errors may occur but is slow and distracting.
-// Consider implementing this functionality more directly, such as
-// using _mkdir and CreateProcess etc.
-// But use the current means now as matches Unix implementations and while
-// in proof of concept / testing phase.
-// TODO! Use <filesystem> eventually.
-static
-bool
-remove_folder_and_subfolders(const std::string& folder)
-{
-#  ifdef _WIN32
-#    if USE_SHELL_API
-    // Delete the folder contents by deleting the folder.
-    std::string cmd = "rd /s /q \"";
-    cmd += folder;
-    cmd += '\"';
-    return std::system(cmd.c_str()) == EXIT_SUCCESS;
-#    else  // !USE_SHELL_API
-    // Create a buffer containing the path to delete. It must be terminated
-    // by two nuls. Who designs these API's...
-    std::vector<char> from;
-    from.assign(folder.begin(), folder.end());
-    from.push_back('\0');
-    from.push_back('\0');
-    SHFILEOPSTRUCT fo{}; // Zero initialize.
-    fo.wFunc = FO_DELETE;
-    fo.pFrom = from.data();
-    fo.fFlags = FOF_NO_UI;
-    int ret = SHFileOperation(&fo);
-    if (ret == 0 && !fo.fAnyOperationsAborted)
-        return true;
-    return false;
-#    endif  // !USE_SHELL_API
-#  else   // !_WIN32
-#    if USE_SHELL_API
-    return std::system(("rm -R " + folder).c_str()) == EXIT_SUCCESS;
-#    else // !USE_SHELL_API
-    struct dir_deleter {
-        dir_deleter() {}
-        void operator()(DIR* d) const
-        {
-            if (d != nullptr)
-            {
-                int result = closedir(d);
-                assert(result == 0);
-            }
-        }
-    };
-    using closedir_ptr = std::unique_ptr<DIR, dir_deleter>;
-
-    std::string filename;
-    struct stat statbuf;
-    std::size_t folder_len = folder.length();
-    struct dirent* p = nullptr;
-
-    closedir_ptr d(opendir(folder.c_str()));
-    bool r = d.get() != nullptr;
-    while (r && (p=readdir(d.get())) != nullptr)
-    {
-        if (strcmp(p->d_name, ".") == 0 || strcmp(p->d_name, "..") == 0)
-           continue;
-
-        // + 2 for path delimiter and nul terminator.
-        std::size_t buf_len = folder_len + strlen(p->d_name) + 2;
-        filename.resize(buf_len);
-        std::size_t path_len = static_cast<std::size_t>(
-            snprintf(&filename[0], buf_len, "%s/%s", folder.c_str(), p->d_name));
-        assert(path_len == buf_len - 1);
-        filename.resize(path_len);
-
-        if (stat(filename.c_str(), &statbuf) == 0)
-            r = S_ISDIR(statbuf.st_mode)
-              ? remove_folder_and_subfolders(filename)
-              : unlink(filename.c_str()) == 0;
-    }
-    d.reset();
-
-    if (r)
-        r = rmdir(folder.c_str()) == 0;
-
-    return r;
-#    endif // !USE_SHELL_API
-#  endif  // !_WIN32
-}
-
-static
-bool
-make_directory(const std::string& folder)
-{
-#  ifdef _WIN32
-#    if USE_SHELL_API
-    // Re-create the folder.
-    std::string cmd = "mkdir \"";
-    cmd += folder;
-    cmd += '\"';
-    return std::system(cmd.c_str()) == EXIT_SUCCESS;
-#    else  // !USE_SHELL_API
-    return _mkdir(folder.c_str()) == 0;
-#    endif // !USE_SHELL_API
-#  else  // !_WIN32
-#    if USE_SHELL_API
-    return std::system(("mkdir " + folder).c_str()) == EXIT_SUCCESS;
-#    else  // !USE_SHELL_API
-    return mkdir(folder.c_str(), 0777) == 0;
-#    endif  // !USE_SHELL_API
-#  endif  // !_WIN32
-}
-
-static
-bool
-delete_file(const std::string& file)
-{
-#  ifdef _WIN32
-#    if USE_SHELL_API
-    std::string cmd = "del \"";
-    cmd += file;
-    cmd += '\"';
-    return std::system(cmd.c_str()) == 0;
-#    else  // !USE_SHELL_API
-    return _unlink(file.c_str()) == 0;
-#    endif // !USE_SHELL_API
-#  else  // !_WIN32
-#    if USE_SHELL_API
-    return std::system(("rm " + file).c_str()) == EXIT_SUCCESS;
-#    else // !USE_SHELL_API
-    return unlink(file.c_str()) == 0;
-#    endif // !USE_SHELL_API
-#  endif  // !_WIN32
-}
-
-#  ifdef _WIN32
-
-static
-bool
-move_file(const std::string& from, const std::string& to)
-{
-#    if USE_SHELL_API
-    std::string cmd = "move \"";
-    cmd += from;
-    cmd += "\" \"";
-    cmd += to;
-    cmd += '\"';
-    return std::system(cmd.c_str()) == EXIT_SUCCESS;
-#    else  // !USE_SHELL_API
-    return !!::MoveFile(from.c_str(), to.c_str());
-#    endif // !USE_SHELL_API
-}
-
-// Usually something like "c:\Program Files".
-static
-std::string
-get_program_folder()
-{
-    return get_known_folder(FOLDERID_ProgramFiles);
-}
-
-// Note folder can and usually does contain spaces.
-static
-std::string
-get_unzip_program()
-{
-    std::string path;
-
-    // 7-Zip appears to note its location in the registry.
-    // If that doesn't work, fall through and take a guess, but it will likely be wrong.
-    HKEY hKey = nullptr;
-    if (RegOpenKeyExA(HKEY_LOCAL_MACHINE, "SOFTWARE\\7-Zip", 0, KEY_READ, &hKey) == ERROR_SUCCESS)
-    {
-        char value_buffer[MAX_PATH + 1]; // fyi 260 at time of writing.
-        // in/out parameter. Documentation say that size is a count of bytes not chars.
-        DWORD size = sizeof(value_buffer) - sizeof(value_buffer[0]);
-        DWORD tzi_type = REG_SZ;
-        // Testing shows Path key value is "C:\Program Files\7-Zip\" i.e. always with trailing \.
-        bool got_value = (RegQueryValueExA(hKey, "Path", nullptr, &tzi_type,
-            reinterpret_cast<LPBYTE>(value_buffer), &size) == ERROR_SUCCESS);
-        RegCloseKey(hKey); // Close now incase of throw later.
-        if (got_value)
-        {
-            // Function does not guarantee to null terminate.
-            value_buffer[size / sizeof(value_buffer[0])] = '\0';
-            path = value_buffer;
-            if (!path.empty())
-            {
-                path += "7z.exe";
-                return path;
-            }
-        }
-    }
-    path += get_program_folder();
-    path += folder_delimiter;
-    path += "7-Zip\\7z.exe";
-    return path;
-}
-
-#    if !USE_SHELL_API
-static
-int
-run_program(const std::string& command)
-{
-    STARTUPINFO si{};
-    si.cb = sizeof(si);
-    PROCESS_INFORMATION pi{};
-
-    // Allegedly CreateProcess overwrites the command line. Ugh.
-    std::string mutable_command(command);
-    if (CreateProcess(nullptr, &mutable_command[0],
-        nullptr, nullptr, FALSE, CREATE_NO_WINDOW, nullptr, nullptr, &si, &pi))
-    {
-        WaitForSingleObject(pi.hProcess, INFINITE);
-        DWORD exit_code;
-        bool got_exit_code = !!GetExitCodeProcess(pi.hProcess, &exit_code);
-        CloseHandle(pi.hProcess);
-        CloseHandle(pi.hThread);
-        // Not 100% sure about this still active thing is correct,
-        // but I'm going with it because I *think* WaitForSingleObject might
-        // return in some cases without INFINITE-ly waiting.
-        // But why/wouldn't GetExitCodeProcess return false in that case?
-        if (got_exit_code && exit_code != STILL_ACTIVE)
-            return static_cast<int>(exit_code);
-    }
-    return EXIT_FAILURE;
-}
-#    endif // !USE_SHELL_API
-
-static
-std::string
-get_download_tar_file(const std::string& version)
-{
-    auto file = get_install();
-    file += folder_delimiter;
-    file += "tzdata";
-    file += version;
-    file += ".tar";
-    return file;
-}
-
-static
-bool
-extract_gz_file(const std::string& version, const std::string& gz_file,
-                const std::string& dest_folder)
-{
-    auto unzip_prog = get_unzip_program();
-    bool unzip_result = false;
-    // Use the unzip program to extract the tar file from the archive.
-
-    // Aim to create a string like:
-    // "C:\Program Files\7-Zip\7z.exe" x "C:\Users\SomeUser\Downloads\tzdata2016d.tar.gz"
-    //     -o"C:\Users\SomeUser\Downloads\tzdata"
-    std::string cmd;
-    cmd = '\"';
-    cmd += unzip_prog;
-    cmd += "\" x \"";
-    cmd += gz_file;
-    cmd += "\" -o\"";
-    cmd += dest_folder;
-    cmd += '\"';
-
-#    if USE_SHELL_API
-    // When using shelling out with std::system() extra quotes are required around the
-    // whole command. It's weird but necessary it seems, see:
-    // http://stackoverflow.com/q/27975969/576911
-
-    cmd = "\"" + cmd + "\"";
-    if (std::system(cmd.c_str()) == EXIT_SUCCESS)
-        unzip_result = true;
-#    else  // !USE_SHELL_API
-    if (run_program(cmd) == EXIT_SUCCESS)
-        unzip_result = true;
-#    endif // !USE_SHELL_API
-    if (unzip_result)
-        delete_file(gz_file);
-
-    // Use the unzip program extract the data from the tar file that was
-    // just extracted from the archive.
-    auto tar_file = get_download_tar_file(version);
-    cmd = '\"';
-    cmd += unzip_prog;
-    cmd += "\" x \"";
-    cmd += tar_file;
-    cmd += "\" -o\"";
-    cmd += get_install();
-    cmd += '\"';
-#    if USE_SHELL_API
-    cmd = "\"" + cmd + "\"";
-    if (std::system(cmd.c_str()) == EXIT_SUCCESS)
-        unzip_result = true;
-#    else  // !USE_SHELL_API
-    if (run_program(cmd) == EXIT_SUCCESS)
-        unzip_result = true;
-#    endif // !USE_SHELL_API
-
-    if (unzip_result)
-        delete_file(tar_file);
-
-    return unzip_result;
-}
-
-static
-std::string
-get_download_mapping_file(const std::string& version)
-{
-    auto file = get_install() + version + "windowsZones.xml";
-    return file;
-}
-
-#  else  // !_WIN32
-
-#    if !USE_SHELL_API
-static
-int
-run_program(const char* prog, const char*const args[])
-{
-    pid_t pid = fork();
-    if (pid == -1) // Child failed to start.
-        return EXIT_FAILURE;
-
-    if (pid != 0)
-    {
-        // We are in the parent. Child started. Wait for it.
-        pid_t ret;
-        int status;
-        while ((ret = waitpid(pid, &status, 0)) == -1)
-        {
-            if (errno != EINTR)
-                break;
-        }
-        if (ret != -1)
-        {
-            if (WIFEXITED(status))
-                return WEXITSTATUS(status);
-        }
-        printf("Child issues!\n");
-
-        return EXIT_FAILURE; // Not sure what status of child is.
-    }
-    else // We are in the child process. Start the program the parent wants to run.
-    {
-
-        if (execv(prog, const_cast<char**>(args)) == -1) // Does not return.
-        {
-            perror("unreachable 0\n");
-            _Exit(127);
-        }
-        printf("unreachable 2\n");
-    }
-    printf("unreachable 2\n");
-    // Unreachable.
-    assert(false);
-    exit(EXIT_FAILURE);
-    return EXIT_FAILURE;
-}
-#    endif // !USE_SHELL_API
-
-static
-bool
-extract_gz_file(const std::string&, const std::string& gz_file, const std::string&)
-{
-#    if USE_SHELL_API
-    bool unzipped = std::system(("tar -xzf " + gz_file + " -C " + get_install()).c_str()) == EXIT_SUCCESS;
-#    else  // !USE_SHELL_API
-    const char prog[] = {"/usr/bin/tar"};
-    const char*const args[] =
-    {
-        prog, "-xzf", gz_file.c_str(), "-C", get_install().c_str(), nullptr
-    };
-    bool unzipped = (run_program(prog, args) == EXIT_SUCCESS);
-#    endif // !USE_SHELL_API
-    if (unzipped)
-    {
-        delete_file(gz_file);
-        return true;
-    }
-    return false;
-}
-
-#  endif // !_WIN32
-
-bool
-remote_download(const std::string& version)
-{
-    assert(!version.empty());
-
-#  ifdef _WIN32
-    // Download folder should be always available for Windows
-#  else  // !_WIN32
-    // Create download folder if it does not exist on UNIX system
-    auto download_folder = get_download_folder();
-    if (!file_exists(download_folder))
-    {
-        make_directory(download_folder);
-    }
-#  endif  // _WIN32
-
-    auto url = "https://data.iana.org/time-zones/releases/tzdata" + version +
-               ".tar.gz";
-    bool result = download_to_file(url, get_download_gz_file(version),
-                                   download_file_options::binary);
-#  ifdef _WIN32
-    if (result)
-    {
-        auto mapping_file = get_download_mapping_file(version);
-        result = download_to_file("http://unicode.org/repos/cldr/trunk/common/"
-                                  "supplemental/windowsZones.xml",
-            mapping_file, download_file_options::text);
-    }
-#  endif  // _WIN32
-    return result;
-}
-
-bool
-remote_install(const std::string& version)
-{
-    auto success = false;
-    assert(!version.empty());
-
-    std::string install = get_install();
-    auto gz_file = get_download_gz_file(version);
-    if (file_exists(gz_file))
-    {
-        if (file_exists(install))
-            remove_folder_and_subfolders(install);
-        if (make_directory(install))
-        {
-            if (extract_gz_file(version, gz_file, install))
-                success = true;
-#  ifdef _WIN32
-            auto mapping_file_source = get_download_mapping_file(version);
-            auto mapping_file_dest = get_install();
-            mapping_file_dest += folder_delimiter;
-            mapping_file_dest += "windowsZones.xml";
-            if (!move_file(mapping_file_source, mapping_file_dest))
-                success = false;
-#  endif  // _WIN32
-        }
-    }
-    return success;
-}
-
-#endif  // HAS_REMOTE_API
-
-static
-std::string
-get_version(const std::string& path)
-{
-    std::string version;
-    std::ifstream infile(path + "version");
-    if (infile.is_open())
-    {
-        infile >> version;
-        if (!infile.fail())
-            return version;
-    }
-    else
-    {
-        infile.open(path + "NEWS");
-        while (infile)
-        {
-            infile >> version;
-            if (version == "Release")
-            {
-                infile >> version;
-                return version;
-            }
-        }
-    }
-    throw std::runtime_error("Unable to get Timezone database version from " + path);
-}
-
-static
-std::unique_ptr<tzdb>
-init_tzdb()
-{
-    using namespace date;
-    const std::string install = get_install();
-    const std::string path = install + folder_delimiter;
-    std::string line;
-    bool continue_zone = false;
-    std::unique_ptr<tzdb> db(new tzdb);
-
-#if AUTO_DOWNLOAD
-    if (!file_exists(install))
-    {
-        auto rv = remote_version();
-        if (!rv.empty() && remote_download(rv))
-        {
-            if (!remote_install(rv))
-            {
-                std::string msg = "Timezone database version \"";
-                msg += rv;
-                msg += "\" did not install correctly to \"";
-                msg += install;
-                msg += "\"";
-                throw std::runtime_error(msg);
-            }
-        }
-        if (!file_exists(install))
-        {
-            std::string msg = "Timezone database not found at \"";
-            msg += install;
-            msg += "\"";
-            throw std::runtime_error(msg);
-        }
-        db->version = get_version(path);
-    }
-    else
-    {
-        db->version = get_version(path);
-        auto rv = remote_version();
-        if (!rv.empty() && db->version != rv)
-        {
-            if (remote_download(rv))
-            {
-                remote_install(rv);
-                db->version = get_version(path);
-            }
-        }
-    }
-#else  // !AUTO_DOWNLOAD
-    if (!file_exists(install))
-    {
-        std::string msg = "Timezone database not found at \"";
-        msg += install;
-        msg += "\"";
-        throw std::runtime_error(msg);
-    }
-    db->version = get_version(path);
-#endif  // !AUTO_DOWNLOAD
-
-    CONSTDATA char*const files[] =
-    {
-        "africa", "antarctica", "asia", "australasia", "backward", "etcetera", "europe",
-        "pacificnew", "northamerica", "southamerica", "systemv", "leapseconds"
-    };
-
-    for (const auto& filename : files)
-    {
-        std::ifstream infile(path + filename);
-        while (infile)
-        {
-            std::getline(infile, line);
-            if (!line.empty() && line[0] != '#')
-            {
-                std::istringstream in(line);
-                std::string word;
-                in >> word;
-                if (word == "Rule")
-                {
-                    db->rules.push_back(Rule(line));
-                    continue_zone = false;
-                }
-                else if (word == "Link")
-                {
-                    db->links.push_back(link(line));
-                    continue_zone = false;
-                }
-                else if (word == "Leap")
-                {
-                    db->leaps.push_back(leap(line, detail::undocumented{}));
-                    continue_zone = false;
-                }
-                else if (word == "Zone")
-                {
-                    db->zones.push_back(time_zone(line, detail::undocumented{}));
-                    continue_zone = true;
-                }
-                else if (line[0] == '\t' && continue_zone)
-                {
-                    db->zones.back().add(line);
-                }
-                else
-                {
-                    std::cerr << line << '\n';
-                }
-            }
-        }
-    }
-    std::sort(db->rules.begin(), db->rules.end());
-    Rule::split_overlaps(db->rules);
-    std::sort(db->zones.begin(), db->zones.end());
-    db->zones.shrink_to_fit();
-    std::sort(db->links.begin(), db->links.end());
-    db->links.shrink_to_fit();
-    std::sort(db->leaps.begin(), db->leaps.end());
-    db->leaps.shrink_to_fit();
-
-#ifdef _WIN32
-    std::string mapping_file = get_install() + folder_delimiter + "windowsZones.xml";
-    db->mappings = load_timezone_mappings_from_xml_file(mapping_file);
-    sort_zone_mappings(db->mappings);
-#endif // _WIN32
-
-    return db;
-}
-
-const tzdb&
-reload_tzdb()
-{
-#if AUTO_DOWNLOAD
-    auto const& v = get_tzdb_list().front().version;
-    if (!v.empty() && v == remote_version())
-        return get_tzdb_list().front();
-#endif  // AUTO_DOWNLOAD
-    tzdb_list::undocumented_helper::push_front(get_tzdb_list(), init_tzdb().release());
-    return get_tzdb_list().front();
-}
-
-#endif  // !USE_OS_TZDB
-
-const tzdb&
-get_tzdb()
-{
-    return get_tzdb_list().front();
-}
-
-const time_zone*
-#if HAS_STRING_VIEW
-tzdb::locate_zone(std::string_view tz_name) const
-#else
-tzdb::locate_zone(const std::string& tz_name) const
-#endif
-{
-    auto zi = std::lower_bound(zones.begin(), zones.end(), tz_name,
-#if HAS_STRING_VIEW
-        [](const time_zone& z, const std::string_view& nm)
-#else
-        [](const time_zone& z, const std::string& nm)
-#endif
-        {
-            return z.name() < nm;
-        });
-    if (zi == zones.end() || zi->name() != tz_name)
-    {
-#if !USE_OS_TZDB
-        auto li = std::lower_bound(links.begin(), links.end(), tz_name,
-#if HAS_STRING_VIEW
-        [](const link& z, const std::string_view& nm)
-#else
-        [](const link& z, const std::string& nm)
-#endif
-        {
-            return z.name() < nm;
-        });
-        if (li != links.end() && li->name() == tz_name)
-        {
-            zi = std::lower_bound(zones.begin(), zones.end(), li->target(),
-                [](const time_zone& z, const std::string& nm)
-                {
-                    return z.name() < nm;
-                });
-            if (zi != zones.end() && zi->name() == li->target())
-                return &*zi;
-        }
-#endif  // !USE_OS_TZDB
-        throw std::runtime_error(std::string(tz_name) + " not found in timezone database");
-    }
-    return &*zi;
-}
-
-const time_zone*
-#if HAS_STRING_VIEW
-locate_zone(std::string_view tz_name)
-#else
-locate_zone(const std::string& tz_name)
-#endif
-{
-    return get_tzdb().locate_zone(tz_name);
-}
-
-#if USE_OS_TZDB
-
-std::ostream&
-operator<<(std::ostream& os, const tzdb& db)
-{
-    os << "Version: " << db.version << "\n\n";
-    for (const auto& x : db.zones)
-        os << x << '\n';
-#if !MISSING_LEAP_SECONDS
-    os << '\n';
-    for (const auto& x : db.leaps)
-        os << x << '\n';
-#endif  // !MISSING_LEAP_SECONDS
-    return os;
-}
-
-#else  // !USE_OS_TZDB
-
-std::ostream&
-operator<<(std::ostream& os, const tzdb& db)
-{
-    os << "Version: " << db.version << '\n';
-    std::string title("--------------------------------------------"
-                      "--------------------------------------------\n"
-                      "Name           ""Start Y ""End Y   "
-                      "Beginning                              ""Offset  "
-                      "Designator\n"
-                      "--------------------------------------------"
-                      "--------------------------------------------\n");
-    int count = 0;
-    for (const auto& x : db.rules)
-    {
-        if (count++ % 50 == 0)
-            os << title;
-        os << x << '\n';
-    }
-    os << '\n';
-    title = std::string("---------------------------------------------------------"
-                        "--------------------------------------------------------\n"
-                        "Name                               ""Offset      "
-                        "Rule           ""Abrev      ""Until\n"
-                        "---------------------------------------------------------"
-                        "--------------------------------------------------------\n");
-    count = 0;
-    for (const auto& x : db.zones)
-    {
-        if (count++ % 10 == 0)
-            os << title;
-        os << x << '\n';
-    }
-    os << '\n';
-    title = std::string("---------------------------------------------------------"
-                        "--------------------------------------------------------\n"
-                        "Alias                                   ""To\n"
-                        "---------------------------------------------------------"
-                        "--------------------------------------------------------\n");
-    count = 0;
-    for (const auto& x : db.links)
-    {
-        if (count++ % 45 == 0)
-            os << title;
-        os << x << '\n';
-    }
-    os << '\n';
-    title = std::string("---------------------------------------------------------"
-                        "--------------------------------------------------------\n"
-                        "Leap second on\n"
-                        "---------------------------------------------------------"
-                        "--------------------------------------------------------\n");
-    os << title;
-    for (const auto& x : db.leaps)
-        os << x << '\n';
-    return os;
-}
-
-#endif  // !USE_OS_TZDB
-
-// -----------------------
-
-#ifdef _WIN32
-
-static
-std::string
-getTimeZoneKeyName()
-{
-    DYNAMIC_TIME_ZONE_INFORMATION dtzi{};
-    auto result = GetDynamicTimeZoneInformation(&dtzi);
-    if (result == TIME_ZONE_ID_INVALID)
-        throw std::runtime_error("current_zone(): GetDynamicTimeZoneInformation()"
-                                 " reported TIME_ZONE_ID_INVALID.");
-    auto wlen = wcslen(dtzi.TimeZoneKeyName);
-    char buf[128] = {};
-    assert(sizeof(buf) >= wlen+1);
-    wcstombs(buf, dtzi.TimeZoneKeyName, wlen);
-    if (strcmp(buf, "Coordinated Universal Time") == 0)
-        return "UTC";
-    return buf;
-}
-
-const time_zone*
-tzdb::current_zone() const
-{
-    std::string win_tzid = getTimeZoneKeyName();
-    std::string standard_tzid;
-    if (!native_to_standard_timezone_name(win_tzid, standard_tzid))
-    {
-        std::string msg;
-        msg = "current_zone() failed: A mapping from the Windows Time Zone id \"";
-        msg += win_tzid;
-        msg += "\" was not found in the time zone mapping database.";
-        throw std::runtime_error(msg);
-    }
-    return locate_zone(standard_tzid);
-}
-
-#else  // !_WIN32
-
-const time_zone*
-tzdb::current_zone() const
-{
-    // On some OS's a file called /etc/localtime may
-    // exist and it may be either a real file
-    // containing time zone details or a symlink to such a file.
-    // On MacOS and BSD Unix if this file is a symlink it
-    // might resolve to a path like this:
-    // "/usr/share/zoneinfo/America/Los_Angeles"
-    // If it does, we try to determine the current
-    // timezone from the remainder of the path by removing the prefix
-    // and hoping the rest resolves to a valid timezone.
-    // It may not always work though. If it doesn't then an
-    // exception will be thrown by local_timezone.
-    // The path may also take a relative form:
-    // "../usr/share/zoneinfo/America/Los_Angeles".
-    {
-        struct stat sb;
-        CONSTDATA auto timezone = "/etc/localtime";
-        if (lstat(timezone, &sb) == 0 && S_ISLNK(sb.st_mode) && sb.st_size > 0) {
-            using namespace std;
-            string result;
-            char rp[PATH_MAX+1] = {};
-            if (readlink(timezone, rp, sizeof(rp)-1) > 0)
-                result = string(rp);
-            else
-                throw system_error(errno, system_category(), "readlink() failed");
-
-            const size_t pos = result.find(get_tz_dir());
-            if (pos != result.npos)
-                result.erase(0, get_tz_dir().size() + 1 + pos);
-            return locate_zone(result);
-        }
-    }
-    // On embedded systems e.g. buildroot with uclibc the timezone is linked
-    // into /etc/TZ which is a symlink to path like this:
-    // "/usr/share/zoneinfo/uclibc/America/Los_Angeles"
-    // If it does, we try to determine the current
-    // timezone from the remainder of the path by removing the prefix
-    // and hoping the rest resolves to valid timezone.
-    // It may not always work though. If it doesn't then an
-    // exception will be thrown by local_timezone.
-    // The path may also take a relative form:
-    // "../usr/share/zoneinfo/uclibc/America/Los_Angeles".
-    {
-        struct stat sb;
-        CONSTDATA auto timezone = "/etc/TZ";
-        if (lstat(timezone, &sb) == 0 && S_ISLNK(sb.st_mode) && sb.st_size > 0) {
-            using namespace std;
-            string result;
-            char rp[PATH_MAX+1] = {};
-            if (readlink(timezone, rp, sizeof(rp)-1) > 0)
-                result = string(rp);
-            else
-                throw system_error(errno, system_category(), "readlink() failed");
-
-            const size_t pos = result.find(get_tz_dir());
-            if (pos != result.npos)
-                result.erase(0, get_tz_dir().size() + 1 + pos);
-            return locate_zone(result);
-        }
-    }
-    {
-    // On some versions of some linux distro's (e.g. Ubuntu),
-    // the current timezone might be in the first line of
-    // the /etc/timezone file.
-        std::ifstream timezone_file("/etc/timezone");
-        if (timezone_file.is_open())
-        {
-            std::string result;
-            std::getline(timezone_file, result);
-            if (!result.empty())
-                return locate_zone(result);
-        }
-        // Fall through to try other means.
-    }
-    {
-    // On some versions of some bsd distro's (e.g. FreeBSD),
-    // the current timezone might be in the first line of
-    // the /var/db/zoneinfo file.
-        std::ifstream timezone_file("/var/db/zoneinfo");
-        if (timezone_file.is_open())
-        {
-            std::string result;
-            std::getline(timezone_file, result);
-            if (!result.empty())
-                return locate_zone(result);
-        }
-        // Fall through to try other means.
-    }
-    {
-    // On some versions of some bsd distro's (e.g. iOS),
-    // it is not possible to use file based approach,
-    // we switch to system API, calling functions in
-    // CoreFoundation framework.
-#if TARGET_OS_IPHONE
-        std::string result = date::iOSUtils::get_current_timezone();
-        if (!result.empty())
-            return locate_zone(result);
-#endif
-    // Fall through to try other means.
-    }
-    {
-    // On some versions of some linux distro's (e.g. Red Hat),
-    // the current timezone might be in the first line of
-    // the /etc/sysconfig/clock file as:
-    // ZONE="US/Eastern"
-        std::ifstream timezone_file("/etc/sysconfig/clock");
-        std::string result;
-        while (timezone_file)
-        {
-            std::getline(timezone_file, result);
-            auto p = result.find("ZONE=\"");
-            if (p != std::string::npos)
-            {
-                result.erase(p, p+6);
-                result.erase(result.rfind('"'));
-                return locate_zone(result);
-            }
-        }
-        // Fall through to try other means.
-    }
-    throw std::runtime_error("Could not get current timezone");
-}
-
-#endif  // !_WIN32
-
-const time_zone*
-current_zone()
-{
-    return get_tzdb().current_zone();
-}
-
-}  // namespace date
-
-#if defined(__GNUC__) && __GNUC__ < 5
-# pragma GCC diagnostic pop
-#endif
diff --git a/thirdparty/date/test_fail.sh b/thirdparty/date/test_fail.sh
deleted file mode 100755
index 6562647..0000000
--- a/thirdparty/date/test_fail.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/bin/bash
-
-echo $1
-eval $1
-
-if [ $? -eq 0 ]; then
-	exit 0;
-fi
-exit 1;
-
diff --git a/win_build_vs.bat b/win_build_vs.bat
index 4ebb4dd..9335e08 100755
--- a/win_build_vs.bat
+++ b/win_build_vs.bat
@@ -32,56 +32,32 @@
 set cpack=OFF
 set installer_merge_modules=OFF
 set strict_gsl_checks=
+set redist=
 
 set arg_counter=0
 for %%x in (%*) do (
     set /A arg_counter+=1
     echo %%~x
-    if [%%~x] EQU [/T] (
-        set skiptests=ON
-    )
-    if [%%~x] EQU [/P] (
-        set cpack=ON
-    )
-    if [%%~x] EQU [/K] (
-        set build_kafka=ON
-    )
-    if [%%~x] EQU [/J] (
-        set build_JNI=ON
-    )
-    if [%%~x] EQU [/S] (
-        set build_SQL=ON
-    )
-    if [%%~x] EQU [/M] (
-        set installer_merge_modules=ON
-    )
-    if [%%~x] EQU [/C] (
-        set build_coap=ON
-    )
-    if [%%~x] EQU [/A] (
-        set build_AWS=ON
-    )
-    if [%%~x] EQU [/2019] (
-        set generator="Visual Studio 16 2019"
-    )
-    if [%%~x] EQU [/64] (
-        set build_platform=x64
-    )
-    if [%%~x] EQU [/D] (
-        set cmake_build_type=RelWithDebInfo
-    )
-    if [%%~x] EQU [/DD] (
-        set cmake_build_type=Debug
-    )
-    if [%%~x] EQU [/CI] (
-        set "strict_gsl_checks=-DSTRICT_GSL_CHECKS=AUDIT"
-    )
+    if [%%~x] EQU [/T]           set skiptests=ON
+    if [%%~x] EQU [/P]           set cpack=ON
+    if [%%~x] EQU [/K]           set build_kafka=ON
+    if [%%~x] EQU [/J]           set build_JNI=ON
+    if [%%~x] EQU [/S]           set build_SQL=ON
+    if [%%~x] EQU [/M]           set installer_merge_modules=ON
+    if [%%~x] EQU [/C]           set build_coap=ON
+    if [%%~x] EQU [/A]           set build_AWS=ON
+    if [%%~x] EQU [/2019]        set generator="Visual Studio 16 2019"
+    if [%%~x] EQU [/64]          set build_platform=x64
+    if [%%~x] EQU [/D]           set cmake_build_type=RelWithDebInfo
+    if [%%~x] EQU [/DD]          set cmake_build_type=Debug
+    if [%%~x] EQU [/CI]          set "strict_gsl_checks=-DSTRICT_GSL_CHECKS=AUDIT"
+    if [%%~x] EQU [/NONFREEUCRT] set "redist=-DMSI_REDISTRIBUTE_UCRT_NONASL=ON"
 )
 
 mkdir %builddir%
 pushd %builddir%\
 
-cmake -G %generator% -A %build_platform% -DINSTALLER_MERGE_MODULES=%installer_merge_modules% -DENABLE_SQL=%build_SQL% -DCMAKE_BUILD_TYPE_INIT=%cmake_build_type% -DCMAKE_BUILD_TYPE=%cmake_build_type% -DWIN32=WIN32 -DENABLE_LIBRDKAFKA=%build_kafka% -DENABLE_JNI=%build_jni% -DOPENSSL_OFF=OFF -DENABLE_COAP=%build_coap% -DENABLE_AWS=%build_AWS% -DUSE_SHARED_LIBS=OFF -DDISABLE_CONTROLLER=ON  -DBUILD_ROCKSDB=ON -DFORCE_WINDOWS=ON -DUSE_SYSTEM_UUID=OFF -DDISABLE_LIBARCHIVE=OFF -DDISABLE_SCRIPTING=ON -DEXCLUDE_BOOST=ON -DENABLE_WEL=TRUE -DFAIL_ON_WARNINGS=OFF -DSKIP_TESTS=%skiptests% %strict_gsl_checks% .. && msbuild /m nifi-minifi-cpp.sln /property:Configuration=%cmake_build_type% /property:Platform=%build_platform% && copy main\%cmake_build_type%\minifi.exe main\
+cmake -G %generator% -A %build_platform% -DINSTALLER_MERGE_MODULES=%installer_merge_modules% -DENABLE_SQL=%build_SQL% -DCMAKE_BUILD_TYPE_INIT=%cmake_build_type% -DCMAKE_BUILD_TYPE=%cmake_build_type% -DWIN32=WIN32 -DENABLE_LIBRDKAFKA=%build_kafka% -DENABLE_JNI=%build_jni% -DOPENSSL_OFF=OFF -DENABLE_COAP=%build_coap% -DENABLE_AWS=%build_AWS% -DUSE_SHARED_LIBS=OFF -DDISABLE_CONTROLLER=ON  -DBUILD_ROCKSDB=ON -DFORCE_WINDOWS=ON -DUSE_SYSTEM_UUID=OFF -DDISABLE_LIBARCHIVE=OFF -DDISABLE_SCRIPTING=ON -DEXCLUDE_BOOST=ON -DENABLE_WEL=TRUE -DFAIL_ON_WARNINGS=OFF -DSKIP_TESTS=%skiptests% %strict_gsl_checks% %redist% .. && msbuild /m nifi-minifi-cpp.sln /property:Configuration=%cmake_build_type% /property:Platform=%build_platform% && copy main\%cmake_build_type%\minifi.exe main\
 IF %ERRORLEVEL% NEQ 0 EXIT /b %ERRORLEVEL%
 if [%cpack%] EQU [ON] (
     cpack -C %cmake_build_type%