[Release] Update versions for 1.0.0
diff --git a/c_glib/configure.ac b/c_glib/configure.ac
index 27aed3c..93bd935 100644
--- a/c_glib/configure.ac
+++ b/c_glib/configure.ac
@@ -17,7 +17,7 @@
 
 AC_PREREQ(2.65)
 
-m4_define([arrow_glib_version], 1.0.0-SNAPSHOT)
+m4_define([arrow_glib_version], 1.0.0)
 AC_INIT([arrow-glib],
         arrow_glib_version,
         [https://issues.apache.org/jira/browse/ARROW],
diff --git a/c_glib/meson.build b/c_glib/meson.build
index f6caa3f..46f7f92 100644
--- a/c_glib/meson.build
+++ b/c_glib/meson.build
@@ -23,7 +23,7 @@
           'cpp_std=c++11',
         ])
 
-version = '1.0.0-SNAPSHOT'
+version = '1.0.0'
 if version.endswith('-SNAPSHOT')
   version_numbers = version.split('-')[0].split('.')
   version_tag = version.split('-')[1]
diff --git a/ci/scripts/PKGBUILD b/ci/scripts/PKGBUILD
index 4bf08b7..40747cc 100644
--- a/ci/scripts/PKGBUILD
+++ b/ci/scripts/PKGBUILD
@@ -18,7 +18,7 @@
 _realname=arrow
 pkgbase=mingw-w64-${_realname}
 pkgname="${MINGW_PACKAGE_PREFIX}-${_realname}"
-pkgver=0.17.1.9000
+pkgver=1.0.0
 pkgrel=8000
 pkgdesc="Apache Arrow is a cross-language development platform for in-memory data (mingw-w64)"
 arch=("any")
diff --git a/cpp/CMakeLists.txt b/cpp/CMakeLists.txt
index 3629e57..300f043 100644
--- a/cpp/CMakeLists.txt
+++ b/cpp/CMakeLists.txt
@@ -54,7 +54,7 @@
   cmake_policy(SET CMP0063 NEW)
 endif()
 
-set(ARROW_VERSION "1.0.0-SNAPSHOT")
+set(ARROW_VERSION "1.0.0")
 
 string(REGEX MATCH "^[0-9]+\\.[0-9]+\\.[0-9]+" ARROW_BASE_VERSION "${ARROW_VERSION}")
 
diff --git a/csharp/Directory.Build.props b/csharp/Directory.Build.props
index bdfe2ae..6c2e37a 100644
--- a/csharp/Directory.Build.props
+++ b/csharp/Directory.Build.props
@@ -29,7 +29,7 @@
     <Product>Apache Arrow library</Product>
     <Copyright>Copyright 2016-2019 The Apache Software Foundation</Copyright>
     <Company>The Apache Software Foundation</Company>
-    <Version>1.0.0-SNAPSHOT</Version>
+    <Version>1.0.0</Version>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/dev/tasks/homebrew-formulae/apache-arrow.rb b/dev/tasks/homebrew-formulae/apache-arrow.rb
index 4c7efbd..bfdc212 100644
--- a/dev/tasks/homebrew-formulae/apache-arrow.rb
+++ b/dev/tasks/homebrew-formulae/apache-arrow.rb
@@ -1,7 +1,7 @@
 class ApacheArrow < Formula
   desc "Columnar in-memory analytics layer designed to accelerate big data"
   homepage "https://arrow.apache.org/"
-  url "https://www.apache.org/dyn/closer.lua?path=arrow/arrow-1.0.0-SNAPSHOT/apache-arrow-1.0.0-SNAPSHOT.tar.gz"
+  url "https://www.apache.org/dyn/closer.lua?path=arrow/arrow-1.0.0/apache-arrow-1.0.0.tar.gz"
   sha256 "9948ddb6d4798b51552d0dca3252dd6e3a7d0f9702714fc6f5a1b59397ce1d28"
   license "Apache-2.0"
   head "https://github.com/apache/arrow.git"
diff --git a/dev/tasks/homebrew-formulae/autobrew/apache-arrow.rb b/dev/tasks/homebrew-formulae/autobrew/apache-arrow.rb
index 755c01c..9008884 100644
--- a/dev/tasks/homebrew-formulae/autobrew/apache-arrow.rb
+++ b/dev/tasks/homebrew-formulae/autobrew/apache-arrow.rb
@@ -19,7 +19,7 @@
 class ApacheArrow < Formula
   desc "Columnar in-memory analytics layer designed to accelerate big data"
   homepage "https://arrow.apache.org/"
-  url "https://www.apache.org/dyn/closer.lua?path=arrow/arrow-0.17.1.9000/apache-arrow-0.17.1.9000.tar.gz"
+  url "https://www.apache.org/dyn/closer.lua?path=arrow/arrow-1.0.0/apache-arrow-1.0.0.tar.gz"
   sha256 "9948ddb6d4798b51552d0dca3252dd6e3a7d0f9702714fc6f5a1b59397ce1d28"
   head "https://github.com/apache/arrow.git"
 
diff --git a/js/package.json b/js/package.json
index 24eee1a..ef433d8 100644
--- a/js/package.json
+++ b/js/package.json
@@ -113,5 +113,5 @@
   "engines": {
     "node": ">=11.12"
   },
-  "version": "1.0.0-SNAPSHOT"
+  "version": "1.0.0"
 }
diff --git a/matlab/CMakeLists.txt b/matlab/CMakeLists.txt
index 2800beb..5ebaa91 100755
--- a/matlab/CMakeLists.txt
+++ b/matlab/CMakeLists.txt
@@ -18,7 +18,7 @@
 cmake_minimum_required(VERSION 3.2)
 set(CMAKE_CXX_STANDARD 11)
 
-set(MLARROW_VERSION "1.0.0-SNAPSHOT")
+set(MLARROW_VERSION "1.0.0")
 string(REGEX MATCH
   "^[0-9]+\\.[0-9]+\\.[0-9]+" MLARROW_BASE_VERSION "${MLARROW_VERSION}")
 
diff --git a/python/setup.py b/python/setup.py
index bc3efee..da9f3bd 100755
--- a/python/setup.py
+++ b/python/setup.py
@@ -519,7 +519,7 @@
 
 # If the event of not running from a git clone (e.g. from a git archive
 # or a Python sdist), see if we can set the version number ourselves
-default_version = '1.0.0-SNAPSHOT'
+default_version = '1.0.0'
 if (not os.path.exists('../.git') and
         not os.environ.get('SETUPTOOLS_SCM_PRETEND_VERSION')):
     if os.path.exists('PKG-INFO'):
diff --git a/r/DESCRIPTION b/r/DESCRIPTION
index 34afe4f..192f1df 100644
--- a/r/DESCRIPTION
+++ b/r/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: arrow
 Title: Integration to 'Apache' 'Arrow'
-Version: 0.17.1.9000
+Version: 1.0.0
 Authors@R: c(
     person("Romain", "Fran\u00e7ois", email = "romain@rstudio.com", role = c("aut"), comment = c(ORCID = "0000-0002-2444-4226")),
     person("Jeroen", "Ooms", email = "jeroen@berkeley.edu", role = c("aut")),
diff --git a/r/NEWS.md b/r/NEWS.md
index c810487..e9b546b 100644
--- a/r/NEWS.md
+++ b/r/NEWS.md
@@ -17,7 +17,7 @@
   under the License.
 -->
 
-# arrow 0.17.1.9000
+# arrow 1.0.0
 
 ## Arrow format conversion
 
diff --git a/ruby/red-arrow-cuda/lib/arrow-cuda/version.rb b/ruby/red-arrow-cuda/lib/arrow-cuda/version.rb
index 47b8f4f..3a57ca8 100644
--- a/ruby/red-arrow-cuda/lib/arrow-cuda/version.rb
+++ b/ruby/red-arrow-cuda/lib/arrow-cuda/version.rb
@@ -16,7 +16,7 @@
 # under the License.
 
 module ArrowCUDA
-  VERSION = "1.0.0-SNAPSHOT"
+  VERSION = "1.0.0"
 
   module Version
     numbers, TAG = VERSION.split("-")
diff --git a/ruby/red-arrow-dataset/lib/arrow-dataset/version.rb b/ruby/red-arrow-dataset/lib/arrow-dataset/version.rb
index d085ccc..52ddfee 100644
--- a/ruby/red-arrow-dataset/lib/arrow-dataset/version.rb
+++ b/ruby/red-arrow-dataset/lib/arrow-dataset/version.rb
@@ -16,7 +16,7 @@
 # under the License.
 
 module ArrowDataset
-  VERSION = "1.0.0-SNAPSHOT"
+  VERSION = "1.0.0"
 
   module Version
     numbers, TAG = VERSION.split("-")
diff --git a/ruby/red-arrow/lib/arrow/version.rb b/ruby/red-arrow/lib/arrow/version.rb
index 7b50309..80cb147 100644
--- a/ruby/red-arrow/lib/arrow/version.rb
+++ b/ruby/red-arrow/lib/arrow/version.rb
@@ -16,7 +16,7 @@
 # under the License.
 
 module Arrow
-  VERSION = "1.0.0-SNAPSHOT"
+  VERSION = "1.0.0"
 
   module Version
     numbers, TAG = VERSION.split("-")
diff --git a/ruby/red-gandiva/lib/gandiva/version.rb b/ruby/red-gandiva/lib/gandiva/version.rb
index 5eee369..9c21ca0 100644
--- a/ruby/red-gandiva/lib/gandiva/version.rb
+++ b/ruby/red-gandiva/lib/gandiva/version.rb
@@ -16,7 +16,7 @@
 # under the License.
 
 module Gandiva
-  VERSION = "1.0.0-SNAPSHOT"
+  VERSION = "1.0.0"
 
   module Version
     numbers, TAG = VERSION.split("-")
diff --git a/ruby/red-parquet/lib/parquet/version.rb b/ruby/red-parquet/lib/parquet/version.rb
index cc3b9ed..45194f2 100644
--- a/ruby/red-parquet/lib/parquet/version.rb
+++ b/ruby/red-parquet/lib/parquet/version.rb
@@ -16,7 +16,7 @@
 # under the License.
 
 module Parquet
-  VERSION = "1.0.0-SNAPSHOT"
+  VERSION = "1.0.0"
 
   module Version
     numbers, TAG = VERSION.split("-")
diff --git a/ruby/red-plasma/lib/plasma/version.rb b/ruby/red-plasma/lib/plasma/version.rb
index 6aa8fc5..f05bbe2 100644
--- a/ruby/red-plasma/lib/plasma/version.rb
+++ b/ruby/red-plasma/lib/plasma/version.rb
@@ -16,7 +16,7 @@
 # under the License.
 
 module Plasma
-  VERSION = "1.0.0-SNAPSHOT"
+  VERSION = "1.0.0"
 
   module Version
     numbers, TAG = VERSION.split("-")
diff --git a/rust/arrow-flight/Cargo.toml b/rust/arrow-flight/Cargo.toml
index 1593a27..5d36c47 100644
--- a/rust/arrow-flight/Cargo.toml
+++ b/rust/arrow-flight/Cargo.toml
@@ -18,7 +18,7 @@
 [package]
 name = "arrow-flight"
 description = "Apache Arrow Flight"
-version = "1.0.0-SNAPSHOT"
+version = "1.0.0"
 edition = "2018"
 authors = ["Apache Arrow <dev@arrow.apache.org>"]
 homepage = "https://github.com/apache/arrow"
diff --git a/rust/arrow/Cargo.toml b/rust/arrow/Cargo.toml
index e5210aa..a4bdabd 100644
--- a/rust/arrow/Cargo.toml
+++ b/rust/arrow/Cargo.toml
@@ -17,7 +17,7 @@
 
 [package]
 name = "arrow"
-version = "1.0.0-SNAPSHOT"
+version = "1.0.0"
 description = "Rust implementation of Apache Arrow"
 homepage = "https://github.com/apache/arrow"
 repository = "https://github.com/apache/arrow"
@@ -49,7 +49,7 @@
 chrono = "0.4"
 flatbuffers = "0.6"
 hex = "0.4"
-arrow-flight = { path = "../arrow-flight", optional = true, version = "1.0.0-SNAPSHOT" }
+arrow-flight = { path = "../arrow-flight", optional = true, version = "1.0.0" }
 prettytable-rs = { version = "0.8.0", optional = true }
 
 [features]
diff --git a/rust/benchmarks/Cargo.toml b/rust/benchmarks/Cargo.toml
index 0e540c0..a926799 100644
--- a/rust/benchmarks/Cargo.toml
+++ b/rust/benchmarks/Cargo.toml
@@ -18,7 +18,7 @@
 [package]
 name = "arrow-benchmarks"
 description = "Apache Arrow Benchmarks"
-version = "1.0.0-SNAPSHOT"
+version = "1.0.0"
 edition = "2018"
 authors = ["Apache Arrow <dev@arrow.apache.org>"]
 homepage = "https://github.com/apache/arrow"
diff --git a/rust/datafusion/Cargo.toml b/rust/datafusion/Cargo.toml
index a65dd11..28aa699 100644
--- a/rust/datafusion/Cargo.toml
+++ b/rust/datafusion/Cargo.toml
@@ -18,7 +18,7 @@
 [package]
 name = "datafusion"
 description = "DataFusion is an in-memory query engine that uses Apache Arrow as the memory model"
-version = "1.0.0-SNAPSHOT"
+version = "1.0.0"
 homepage = "https://github.com/apache/arrow"
 repository = "https://github.com/apache/arrow"
 authors = ["Apache Arrow <dev@arrow.apache.org>"]
@@ -45,8 +45,8 @@
 
 [dependencies]
 fnv = "1.0"
-arrow = { path = "../arrow", version = "1.0.0-SNAPSHOT" }
-parquet = { path = "../parquet", version = "1.0.0-SNAPSHOT" }
+arrow = { path = "../arrow", version = "1.0.0" }
+parquet = { path = "../parquet", version = "1.0.0" }
 sqlparser = "0.2.6"
 clap = "2.33"
 prettytable-rs = "0.8.0"
@@ -61,7 +61,7 @@
 prost = "0.6"
 tokio = { version = "0.2", features = ["macros"] }
 tonic = "0.2"
-arrow-flight = { path = "../arrow-flight", version = "1.0.0-SNAPSHOT" }
+arrow-flight = { path = "../arrow-flight", version = "1.0.0" }
 
 [[bench]]
 name = "aggregate_query_sql"
diff --git a/rust/datafusion/README.md b/rust/datafusion/README.md
index 0be9a8f..5f8e3f8 100644
--- a/rust/datafusion/README.md
+++ b/rust/datafusion/README.md
@@ -27,7 +27,7 @@
 
 ```toml
 [dependencies]
-datafusion = "1.0.0-SNAPSHOT"
+datafusion = "1.0.0"
 ```
 
 ## Using DataFusion as a binary
diff --git a/rust/integration-testing/Cargo.toml b/rust/integration-testing/Cargo.toml
index 4841848..0e1604d 100644
--- a/rust/integration-testing/Cargo.toml
+++ b/rust/integration-testing/Cargo.toml
@@ -18,7 +18,7 @@
 [package]
 name = "arrow-integration-testing"
 description = "Binaries used in the Arrow integration tests"
-version = "1.0.0-SNAPSHOT"
+version = "1.0.0"
 homepage = "https://github.com/apache/arrow"
 repository = "https://github.com/apache/arrow"
 authors = ["Apache Arrow <dev@arrow.apache.org>"]
diff --git a/rust/parquet/Cargo.toml b/rust/parquet/Cargo.toml
index 20be383..65de44c 100644
--- a/rust/parquet/Cargo.toml
+++ b/rust/parquet/Cargo.toml
@@ -17,7 +17,7 @@
 
 [package]
 name = "parquet"
-version = "1.0.0-SNAPSHOT"
+version = "1.0.0"
 license = "Apache-2.0"
 description = "Apache Parquet implementation in Rust"
 homepage = "https://github.com/apache/arrow"
@@ -49,7 +49,7 @@
 flate2 = "1.0"
 lz4 = "1.23"
 zstd = "0.5"
-arrow = { path = "../arrow", version = "1.0.0-SNAPSHOT" }
+arrow = { path = "../arrow", version = "1.0.0" }
 
 [features]
 default = ["arrow", "snap", "brotli", "flate2", "lz4", "zstd"]
diff --git a/rust/parquet/README.md b/rust/parquet/README.md
index 7f0eb3f..5a62e3f 100644
--- a/rust/parquet/README.md
+++ b/rust/parquet/README.md
@@ -23,7 +23,7 @@
 Add this to your Cargo.toml:
 ```toml
 [dependencies]
-parquet = "1.0.0-SNAPSHOT"
+parquet = "1.0.0"
 ```
 
 and this to your crate root:
@@ -44,7 +44,7 @@
     println!("{}", record);
 }
 ```
-See [crate documentation](https://docs.rs/crate/parquet/1.0.0-SNAPSHOT) on available API.
+See [crate documentation](https://docs.rs/crate/parquet/1.0.0) on available API.
 
 ## Supported Parquet Version
 - Parquet-format 2.4.0