# <pre> | |
# This file is in the public domain, so clarified as of | |
# 2009-05-17 by Arthur David Olson. | |
# also includes Central America and the Caribbean | |
# This data is by no means authoritative; if you think you know better, | |
# go ahead and edit the file (and please send any changes to | |
# tz@iana.org for general use in the future). | |
# From Paul Eggert (1999-03-22): | |
# A reliable and entertaining source about time zones is | |
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). | |
############################################################################### | |
# United States | |
# From Paul Eggert (1999-03-31): | |
# Howse writes (pp 121-125) that time zones were invented by | |
# Professor Charles Ferdinand Dowd (1825-1904), | |
# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). | |
# His pamphlet ``A System of National Time for Railroads'' (1870) | |
# was the result of his proposals at the Convention of Railroad Trunk Lines | |
# in New York City (1869-10). His 1870 proposal was based on Washington, DC, | |
# but in 1872-05 he moved the proposed origin to Greenwich. | |
# His proposal was adopted by the railroads on 1883-11-18 at 12:00, | |
# and the most of the country soon followed suit. | |
# From Paul Eggert (2005-04-16): | |
# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. | |
# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). | |
# From Paul Eggert (2006-03-22): | |
# A good source for time zone historical data in the US is | |
# Thomas G. Shanks, The American Atlas (5th edition), | |
# San Diego: ACS Publications, Inc. (1991). | |
# Make sure you have the errata sheet; the book is somewhat useless without it. | |
# It is the source for most of the pre-1991 US entries below. | |
# From Paul Eggert (2001-03-06): | |
# Daylight Saving Time was first suggested as a joke by Benjamin Franklin | |
# in his whimsical essay ``An Economical Project for Diminishing the Cost | |
# of Light'' published in the Journal de Paris (1784-04-26). | |
# Not everyone is happy with the results: | |
# | |
# I don't really care how time is reckoned so long as there is some | |
# agreement about it, but I object to being told that I am saving | |
# daylight when my reason tells me that I am doing nothing of the kind. | |
# I even object to the implication that I am wasting something | |
# valuable if I stay in bed after the sun has risen. As an admirer | |
# of moonlight I resent the bossy insistence of those who want to | |
# reduce my time for enjoying it. At the back of the Daylight Saving | |
# scheme I detect the bony, blue-fingered hand of Puritanism, eager | |
# to push people into bed earlier, and get them up earlier, to make | |
# them healthy, wealthy and wise in spite of themselves. | |
# | |
# -- Robertson Davies, The diary of Samuel Marchbanks, | |
# Clarke, Irwin (1947), XIX, Sunday | |
# | |
# For more about the first ten years of DST in the United States, see | |
# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> | |
# Ten years of daylight saving from the Pittsburgh standpoint | |
# (Carnegie Library of Pittsburgh, 1927)</a>. | |
# | |
# Shanks says that DST was called "War Time" in the US in 1918 and 1919. | |
# However, DST was imposed by the Standard Time Act of 1918, which | |
# was the first nationwide legal time standard, and apparently | |
# time was just called "Standard Time" or "Daylight Saving Time". | |
# From Arthur David Olson: | |
# US Daylight Saving Time ended on the last Sunday of *October* in 1974. | |
# See, for example, the front page of the Saturday, 1974-10-26 | |
# and Sunday, 1974-10-27 editions of the Washington Post. | |
# From Arthur David Olson: | |
# Before the Uniform Time Act of 1966 took effect in 1967, observance of | |
# Daylight Saving Time in the US was by local option, except during wartime. | |
# From Arthur David Olson (2000-09-25): | |
# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. | |
# In the introduction, Oboler spoke of "Eastern Peace Time." | |
# An AltaVista search turned up | |
# <a href="http://rowayton.org/rhs/hstaug45.html">: | |
# "When the time is announced over the radio now, it is 'Eastern Peace | |
# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." | |
# </a> (August 1945) by way of confirmation. | |
# From Joseph Gallant citing | |
# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): | |
# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set | |
# to switch to London for Attlee's address, but the American people | |
# never got to hear his speech live. According to one press account, | |
# CBS' Bob Trout was first to announce the word of Japan's surrender, | |
# but a few seconds later, NBC, ABC and Mutual also flashed the word | |
# of surrender, all of whom interrupting the bells of Big Ben in | |
# London which were to precede Mr. Attlee's speech. | |
# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From | |
# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: | |
# | |
# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. | |
# Any announcement from Asia would reach St. John's New York newsroom on a | |
# wire service teletype machine, which had prescribed signals for major news. | |
# Associated Press, for example, would ring five bells before spewing out | |
# typed copy of an important story, and 10 bells for news "of transcendental | |
# importance." | |
# | |
# On Aug. 14, stalling while talking steadily into the NBC networks' open | |
# microphone, St. John heard five bells and waited only to hear a sixth bell, | |
# before announcing confidently: "Ladies and gentlemen, World War II is over. | |
# The Japanese have agreed to our surrender terms." | |
# | |
# He had scored a 20-second scoop on other broadcasters. | |
# From Arthur David Olson (2005-08-22): | |
# Paul has been careful to use the "US" rules only in those locations | |
# that are part of the United States; this reflects the real scope of | |
# U.S. government action. So even though the "US" rules have changed | |
# in the latest release, other countries won't be affected. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule US 1918 1919 - Mar lastSun 2:00 1:00 D | |
Rule US 1918 1919 - Oct lastSun 2:00 0 S | |
Rule US 1942 only - Feb 9 2:00 1:00 W # War | |
Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace | |
Rule US 1945 only - Sep 30 2:00 0 S | |
Rule US 1967 2006 - Oct lastSun 2:00 0 S | |
Rule US 1967 1973 - Apr lastSun 2:00 1:00 D | |
Rule US 1974 only - Jan 6 2:00 1:00 D | |
Rule US 1975 only - Feb 23 2:00 1:00 D | |
Rule US 1976 1986 - Apr lastSun 2:00 1:00 D | |
Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D | |
Rule US 2007 max - Mar Sun>=8 2:00 1:00 D | |
Rule US 2007 max - Nov Sun>=1 2:00 0 S | |
# From Arthur David Olson, 2005-12-19 | |
# We generate the files specified below to guard against old files with | |
# obsolete information being left in the time zone binary directory. | |
# We limit the list to names that have appeared in previous versions of | |
# this time zone package. | |
# We do these as separate Zones rather than as Links to avoid problems if | |
# a particular place changes whether it observes DST. | |
# We put these specifications here in the northamerica file both to | |
# increase the chances that they'll actually get compiled and to | |
# avoid the need to duplicate the US rules in another file. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone EST -5:00 - EST | |
Zone MST -7:00 - MST | |
Zone HST -10:00 - HST | |
Zone EST5EDT -5:00 US E%sT | |
Zone CST6CDT -6:00 US C%sT | |
Zone MST7MDT -7:00 US M%sT | |
Zone PST8PDT -8:00 US P%sT | |
# From Bob Devine (1988-01-28): | |
# ...Alaska (and Hawaii) had the timezone names changed in 1967. | |
# old new | |
# Pacific Standard Time(PST) -same- | |
# Yukon Standard Time(YST) -same- | |
# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) | |
# Nome Standard Time (NT) Bering Standard Time (BST) | |
# | |
# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. | |
# The YST zone now covers nearly all of the state, AHST just part | |
# of the Aleutian islands. No DST. | |
# From Paul Eggert (1995-12-19): | |
# The tables below use `NST', not `NT', for Nome Standard Time. | |
# I invented `CAWT' for Central Alaska War Time. | |
# From U. S. Naval Observatory (1989-01-19): | |
# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON | |
# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 | |
# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON | |
# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 | |
# USA MOUNTAIN 7 H BEHIND UTC DENVER | |
# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 | |
# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO | |
# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 | |
# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) | |
# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) | |
# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W | |
# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 | |
# USA HAWAII 10 H BEHIND UTC | |
# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY | |
# From Arthur David Olson (1989-01-21): | |
# The above dates are for 1988. | |
# Note the "AKST" and "AKDT" abbreviations, the claim that there's | |
# no DST in Samoa, and the claim that there is DST in Alaska and the | |
# Aleutians. | |
# From Arthur David Olson (1988-02-13): | |
# Legal standard time zone names, from United States Code (1982 Edition and | |
# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names | |
# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 | |
# took effect), as explained in sections 263 and 261: | |
# (none) | |
# United States standard eastern time | |
# United States standard mountain time | |
# United States standard central time | |
# United States standard Pacific time | |
# (none) | |
# United States standard Alaska time | |
# (none) | |
# Next, names from 1967-04-01 until 1983-11-30 (the date for | |
# public law 98-181): | |
# Atlantic standard time | |
# eastern standard time | |
# central standard time | |
# mountain standard time | |
# Pacific standard time | |
# Yukon standard time | |
# Alaska-Hawaii standard time | |
# Bering standard time | |
# And after 1983-11-30: | |
# Atlantic standard time | |
# eastern standard time | |
# central standard time | |
# mountain standard time | |
# Pacific standard time | |
# Alaska standard time | |
# Hawaii-Aleutian standard time | |
# Samoa standard time | |
# The law doesn't give abbreviations. | |
# | |
# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: | |
# Public law 106-564 (2000-12-23) introduced the abbreviation | |
# "Chamorro Standard Time" for time in Guam and the Northern Marianas. | |
# See the file "australasia". | |
# From Arthur David Olson, 2005-08-09 | |
# The following was signed into law on 2005-08-08. | |
# | |
# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. | |
# (a) Amendment- Section 3(a) of the Uniform Time Act of 1966 (15 | |
# U.S.C. 260a(a)) is amended-- | |
# (1) by striking `first Sunday of April' and inserting `second | |
# Sunday of March'; and | |
# (2) by striking `last Sunday of October' and inserting `first | |
# Sunday of November'. | |
# (b) Effective Date- Subsection (a) shall take effect 1 year after the | |
# date of enactment of this Act or March 1, 2007, whichever is later. | |
# (c) Report to Congress- Not later than 9 months after the effective | |
# date stated in subsection (b), the Secretary shall report to Congress | |
# on the impact of this section on energy consumption in the United | |
# States. | |
# (d) Right to Revert- Congress retains the right to revert the | |
# Daylight Saving Time back to the 2005 time schedules once the | |
# Department study is complete. | |
# US eastern time, represented by New York | |
# Connecticut, Delaware, District of Columbia, most of Florida, | |
# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky | |
# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, | |
# New Hampshire, New Jersey, New York, North Carolina, Ohio, | |
# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, | |
# Vermont, Virginia, West Virginia | |
# From Dave Cantor (2004-11-02): | |
# Early this summer I had the occasion to visit the Mount Washington | |
# Observatory weather station atop (of course!) Mount Washington [, NH].... | |
# One of the staff members said that the station was on Eastern Standard Time | |
# and didn't change their clocks for Daylight Saving ... so that their | |
# reports will always have times which are 5 hours behind UTC. | |
# From Paul Eggert (2005-08-26): | |
# According to today's Huntsville Times | |
# <http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1> | |
# a few towns on Alabama's "eastern border with Georgia, such as Phenix City | |
# in Russell County, Lanett in Chambers County and some towns in Lee County, | |
# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" | |
# Roberts, city administrator in Phenix City. as saying "We are in the Central | |
# time zone, but we do go by the Eastern time zone because so many people work | |
# in Columbus." | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule NYC 1920 only - Mar lastSun 2:00 1:00 D | |
Rule NYC 1920 only - Oct lastSun 2:00 0 S | |
Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D | |
Rule NYC 1921 1954 - Sep lastSun 2:00 0 S | |
Rule NYC 1955 1966 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 | |
-5:00 US E%sT 1920 | |
-5:00 NYC E%sT 1942 | |
-5:00 US E%sT 1946 | |
-5:00 NYC E%sT 1967 | |
-5:00 US E%sT | |
# US central time, represented by Chicago | |
# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, | |
# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and | |
# Washington counties), Illinois, western Indiana | |
# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, | |
# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western | |
# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern | |
# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, | |
# western Tennessee, most of Texas, Wisconsin | |
# From Larry M. Smith (2006-04-26) re Wisconsin: | |
# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... | |
# is currently enforced at the 01:00 time of change. Because the local | |
# "bar time" in the state corresponds to 02:00, a number of citations | |
# are issued for the "sale of class 'B' alcohol after prohibited | |
# hours" within the deviated hour of this change every year.... | |
# | |
# From Douglas R. Bomberg (2007-03-12): | |
# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI | |
# Statue 175 closer in synch with the US Congress' intent.... | |
# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Chicago 1920 only - Jun 13 2:00 1:00 D | |
Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S | |
Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D | |
Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D | |
Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S | |
Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 | |
-6:00 US C%sT 1920 | |
-6:00 Chicago C%sT 1936 Mar 1 2:00 | |
-5:00 - EST 1936 Nov 15 2:00 | |
-6:00 Chicago C%sT 1942 | |
-6:00 US C%sT 1946 | |
-6:00 Chicago C%sT 1967 | |
-6:00 US C%sT | |
# Oliver County, ND switched from mountain to central time on 1992-10-25. | |
Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 | |
-7:00 US M%sT 1992 Oct 25 02:00 | |
-6:00 US C%sT | |
# Morton County, ND, switched from mountain to central time on | |
# 2003-10-26, except for the area around Mandan which was already central time. | |
# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. | |
# Officially this switch also included part of Sioux County, and | |
# Jones, Mellette, and Todd Counties in South Dakota; | |
# but in practice these other counties were already observing central time. | |
# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. | |
Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 | |
-7:00 US M%sT 2003 Oct 26 02:00 | |
-6:00 US C%sT | |
# From Josh Findley (2011-01-21): | |
# ...it appears that Mercer County, North Dakota, changed from the | |
# mountain time zone to the central time zone at the last transition from | |
# daylight-saving to standard time (on Nov. 7, 2010): | |
# <a href="http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm"> | |
# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm | |
# </a> | |
# <a href="http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html"> | |
# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html | |
# </a> | |
# From Andy Lipscomb (2011-01-24): | |
# ...according to the Census Bureau, the largest city is Beulah (although | |
# it's commonly referred to as Beulah-Hazen, with Hazen being the next | |
# largest city in Mercer County). Google Maps places Beulah's city hall | |
# at 4715'51" north, 10146'40" west, which yields an offset of 6h47'07". | |
Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 | |
-7:00 US M%sT 2010 Nov 7 2:00 | |
-6:00 US C%sT | |
# US mountain time, represented by Denver | |
# | |
# Colorado, far western Kansas, Montana, western | |
# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), | |
# New Mexico, southwestern North Dakota, | |
# western South Dakota, far western Texas (El Paso County, Hudspeth County, | |
# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming | |
# | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D | |
Rule Denver 1920 only - Oct lastSun 2:00 0 S | |
Rule Denver 1921 only - May 22 2:00 0 S | |
Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D | |
Rule Denver 1965 1966 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 | |
-7:00 US M%sT 1920 | |
-7:00 Denver M%sT 1942 | |
-7:00 US M%sT 1946 | |
-7:00 Denver M%sT 1967 | |
-7:00 US M%sT | |
# US Pacific time, represented by Los Angeles | |
# | |
# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, | |
# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, | |
# and the northern three-quarters of Idaho county), | |
# most of Nevada, most of Oregon, and Washington | |
# | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule CA 1948 only - Mar 14 2:00 1:00 D | |
Rule CA 1949 only - Jan 1 2:00 0 S | |
Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D | |
Rule CA 1950 1961 - Sep lastSun 2:00 0 S | |
Rule CA 1962 1966 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 | |
-8:00 US P%sT 1946 | |
-8:00 CA P%sT 1967 | |
-8:00 US P%sT | |
# Alaska | |
# AK%sT is the modern abbreviation for -9:00 per USNO. | |
# | |
# From Paul Eggert (2001-05-30): | |
# Howse writes that Alaska switched from the Julian to the Gregorian calendar, | |
# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. | |
# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, | |
# also a Friday. Include only the time zone part of this transition, | |
# ignoring the switch from Julian to Gregorian, since we can't represent | |
# the Julian calendar. | |
# | |
# As far as we know, none of the exact locations mentioned below were | |
# permanently inhabited in 1867 by anyone using either calendar. | |
# (Yakutat was colonized by the Russians in 1799, but the settlement | |
# was destroyed in 1805 by a Yakutat-kon war party.) However, there | |
# were nearby inhabitants in some cases and for our purposes perhaps | |
# it's best to simply use the official transition. | |
# | |
# From Steve Ferguson (2011-01-31): | |
# The author lives in Alaska and many of the references listed are only | |
# available to Alaskan residents. | |
# | |
# <a href="http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98"> | |
# http://www.alaskahistoricalsociety.org/index.cfm?section=discover%20alaska&page=Glimpses%20of%20the%20Past&viewpost=2&ContentId=98 | |
# </a> | |
# From Arthur David Olson (2011-02-01): | |
# Here's database-relevant material from the 2001 "Alaska History" article: | |
# | |
# On September 20 [1979]...DOT...officials decreed that on April 27, | |
# 1980, Juneau and other nearby communities would move to Yukon Time. | |
# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on | |
# Pacific Time. | |
# | |
# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the | |
# Department's September 1979 decision. Juneau and other communities in | |
# northern Southeast reverted to Pacific Time on October 26. | |
# | |
# On October 28 [1983]...the Metlakatla Indian Community Council voted | |
# unanimously to keep the reservation on Pacific Time. | |
# | |
# According to DOT official Joanne Petrie, Indian reservations are not | |
# bound to follow time zones imposed by neighboring jurisdictions. | |
# | |
# (The last is consistent with how the database now handles the Navajo | |
# Nation.) | |
# From Arthur David Olson (2011-02-09): | |
# I just spoke by phone with a staff member at the Metlakatla Indian | |
# Community office (using contact information available at | |
# <a href="http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla"> | |
# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla | |
# </a>). | |
# It's shortly after 1:00 here on the east coast of the United States; | |
# the staffer said it was shortly after 10:00 there. When I asked whether | |
# that meant they were on Pacific time, they said no--they were on their | |
# own time. I asked about daylight saving; they said it wasn't used. I | |
# did not inquire about practices in the past. | |
# From Arthur David Olson (2011-08-17): | |
# For lack of better information, assume that Metlakatla's | |
# abandonment of use of daylight saving resulted from the 1983 vote. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 | |
-8:57:41 - LMT 1900 Aug 20 12:00 | |
-8:00 - PST 1942 | |
-8:00 US P%sT 1946 | |
-8:00 - PST 1969 | |
-8:00 US P%sT 1980 Apr 27 2:00 | |
-9:00 US Y%sT 1980 Oct 26 2:00 | |
-8:00 US P%sT 1983 Oct 30 2:00 | |
-9:00 US Y%sT 1983 Nov 30 | |
-9:00 US AK%sT | |
Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 | |
-9:01:13 - LMT 1900 Aug 20 12:00 | |
-8:00 - PST 1942 | |
-8:00 US P%sT 1946 | |
-8:00 - PST 1969 | |
-8:00 US P%sT 1983 Oct 30 2:00 | |
-9:00 US Y%sT 1983 Nov 30 | |
-9:00 US AK%sT | |
Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 | |
-8:46:18 - LMT 1900 Aug 20 12:00 | |
-8:00 - PST 1942 | |
-8:00 US P%sT 1946 | |
-8:00 - PST 1969 | |
-8:00 US P%sT 1983 Oct 30 2:00 | |
-8:00 - MeST | |
Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 | |
-9:18:55 - LMT 1900 Aug 20 12:00 | |
-9:00 - YST 1942 | |
-9:00 US Y%sT 1946 | |
-9:00 - YST 1969 | |
-9:00 US Y%sT 1983 Nov 30 | |
-9:00 US AK%sT | |
Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 | |
-9:59:36 - LMT 1900 Aug 20 12:00 | |
-10:00 - CAT 1942 | |
-10:00 US CAT/CAWT 1945 Aug 14 23:00u | |
-10:00 US CAT/CAPT 1946 # Peace | |
-10:00 - CAT 1967 Apr | |
-10:00 - AHST 1969 | |
-10:00 US AH%sT 1983 Oct 30 2:00 | |
-9:00 US Y%sT 1983 Nov 30 | |
-9:00 US AK%sT | |
Zone America/Nome 12:58:21 - LMT 1867 Oct 18 | |
-11:01:38 - LMT 1900 Aug 20 12:00 | |
-11:00 - NST 1942 | |
-11:00 US N%sT 1946 | |
-11:00 - NST 1967 Apr | |
-11:00 - BST 1969 | |
-11:00 US B%sT 1983 Oct 30 2:00 | |
-9:00 US Y%sT 1983 Nov 30 | |
-9:00 US AK%sT | |
Zone America/Adak 12:13:21 - LMT 1867 Oct 18 | |
-11:46:38 - LMT 1900 Aug 20 12:00 | |
-11:00 - NST 1942 | |
-11:00 US N%sT 1946 | |
-11:00 - NST 1967 Apr | |
-11:00 - BST 1969 | |
-11:00 US B%sT 1983 Oct 30 2:00 | |
-10:00 US AH%sT 1983 Nov 30 | |
-10:00 US HA%sT | |
# The following switches don't quite make our 1970 cutoff. | |
# | |
# Shanks writes that part of southwest Alaska (e.g. Aniak) | |
# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, | |
# and another part (e.g. Akiak) made the same switch five weeks later. | |
# | |
# From David Flater (2004-11-09): | |
# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska | |
# Historic Preservation Commission, provided this information, which | |
# suggests that Unalaska deviated from statutory time from early 1967 | |
# possibly until 1983: | |
# | |
# Minutes of the Unalaska City Council Meeting, January 10, 1967: | |
# "Except for St. Paul and Akutan, Unalaska is the only important | |
# location not on Alaska Standard Time. The following resolution was | |
# made by William Robinson and seconded by Henry Swanson: Be it | |
# resolved that the City of Unalaska hereby goes to Alaska Standard | |
# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, | |
# January 14, Alaska Standard Time.) This resolution was passed with | |
# three votes for and one against." | |
# Hawaii | |
# From Arthur David Olson (2010-12-09): | |
# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 | |
# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, | |
# the article is available at | |
# <a href="http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf"> | |
# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf | |
# </a> | |
# and indicates that standard time was adopted effective noon, January | |
# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight | |
# saving for the period between the last Sunday of each April and the | |
# last Sunday of each September, but less than a month later repealed the | |
# act," (page 220), that year-round daylight saving time was in effect | |
# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for | |
# when clocks changed) and that clocks were changed by 30 minutes | |
# effective the second Sunday of June, 1947 (page 219, with no time of | |
# day given for when clocks changed). A footnote for the 1933 changes | |
# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) | |
# and Act 163 (approved 21 May 1933)." | |
# From Arthur David Olson (2011-01-19): | |
# The following is from "Laws of the Territory of Hawaii Passed by the | |
# Seventeenth Legislature: Regular Session 1933," available (as of | |
# 2011-01-19) at American University's Pence Law Library. Page 85: "Act | |
# 90...At 2 o'clock ante meridian of the last Sunday in April of each | |
# year, the standard time of this Territory shall be advanced one | |
# hour...This Act shall take effect upon its approval. Approved this 26th | |
# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of | |
# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is | |
# hereby repealed...This Act shall take effect upon its approval, upon | |
# which date the standard time of this Territory shall be restored to | |
# that existing immediately prior to the taking effect of said Act 90. | |
# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor | |
# of the Territory of Hawaii." | |
# | |
# Note that 1933-05-21 was a Sunday. | |
# We're left to guess the time of day when Act 163 was approved; guess noon. | |
Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 #Schmitt&Cox | |
-10:30 - HST 1933 Apr 30 2:00 #Laws 1933 | |
-10:30 1:00 HDT 1933 May 21 12:00 #Laws 1933+12 | |
-10:30 - HST 1942 Feb 09 2:00 #Schmitt&Cox+2 | |
-10:30 1:00 HDT 1945 Sep 30 2:00 #Schmitt&Cox+2 | |
-10:30 - HST 1947 Jun 8 2:00 #Schmitt&Cox+2 | |
-10:00 - HST | |
# Now we turn to US areas that have diverged from the consensus since 1970. | |
# Arizona mostly uses MST. | |
# From Paul Eggert (2002-10-20): | |
# | |
# The information in the rest of this paragraph is derived from the | |
# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> | |
# Daylight Saving Time web page (2002-01-23)</a> maintained by the | |
# Arizona State Library, Archives and Public Records. | |
# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard | |
# time, but by federal law railroads, airlines, bus lines, military | |
# personnel, and some engaged in interstate commerce continued to | |
# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix | |
# Gazette says that was the date the law changed, and that 04-01 was | |
# the date the state's clocks would change. In 1945 the State of | |
# Arizona used standard time all year, again with exceptions only as | |
# mandated by federal law. Arizona observed DST in 1967, but Arizona | |
# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. | |
# | |
# Shanks says the 1944 experiment came to an end on 1944-03-17. | |
# Go with the Arizona State Library instead. | |
Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 | |
-7:00 US M%sT 1944 Jan 1 00:01 | |
-7:00 - MST 1944 Apr 1 00:01 | |
-7:00 US M%sT 1944 Oct 1 00:01 | |
-7:00 - MST 1967 | |
-7:00 US M%sT 1968 Mar 21 | |
-7:00 - MST | |
# From Arthur David Olson (1988-02-13): | |
# A writer from the Inter Tribal Council of Arizona, Inc., | |
# notes in private correspondence dated 1987-12-28 that "Presently, only the | |
# Navajo Nation participates in the Daylight Saving Time policy, due to its | |
# large size and location in three states." (The "only" means that other | |
# tribal nations don't use DST.) | |
Link America/Denver America/Shiprock | |
# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, | |
# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, | |
# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, | |
# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, | |
# Teton, Twin Falls, Valley, Washington counties, and the southern | |
# quarter of Idaho county) and eastern Oregon (most of Malheur County) | |
# switched four weeks late in 1974. | |
# | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 | |
-8:00 US P%sT 1923 May 13 2:00 | |
-7:00 US M%sT 1974 | |
-7:00 - MST 1974 Feb 3 2:00 | |
-7:00 US M%sT | |
# Indiana | |
# | |
# For a map of Indiana's time zone regions, see: | |
# <a href="http://www.mccsc.edu/time.html"> | |
# What time is it in Indiana? | |
# </a> (2006-03-01) | |
# | |
# From Paul Eggert (2007-08-17): | |
# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, | |
# with the following exceptions: | |
# | |
# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, | |
# Vandenburgh, and Warrick counties have been like America/Chicago. | |
# | |
# - Dearborn and Ohio counties have been like America/New_York. | |
# | |
# - Clark, Floyd, and Harrison counties have been like | |
# America/Kentucky/Louisville. | |
# | |
# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, | |
# and Switzerland counties have their own time zone histories as noted below. | |
# | |
# Shanks partitioned Indiana into 345 regions, each with its own time history, | |
# and wrote ``Even newspaper reports present contradictory information.'' | |
# Those Hoosiers! Such a flighty and changeable people! | |
# Fortunately, most of the complexity occurred before our cutoff date of 1970. | |
# | |
# Other than Indianapolis, the Indiana place names are so nondescript | |
# that they would be ambiguous if we left them at the `America' level. | |
# So we reluctantly put them all in a subdirectory `America/Indiana'. | |
# From Paul Eggert (2005-08-16): | |
# http://www.mccsc.edu/time.html says that Indiana will use DST starting 2006. | |
# From Nathan Stratton Treadway (2006-03-30): | |
# http://www.dot.gov/affairs/dot0406.htm [3705 B] | |
# From Deborah Goldsmith (2006-01-18): | |
# http://dmses.dot.gov/docimages/pdf95/382329_web.pdf [2.9 MB] | |
# From Paul Eggert (2006-01-20): | |
# It says "DOT is relocating the time zone boundary in Indiana to move Starke, | |
# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the | |
# Eastern Time Zone to the Central Time Zone.... The effective date of | |
# this rule is 2:OO a.m. EST Sunday, April 2, 2006, which is the | |
# changeover date from standard time to Daylight Saving Time." | |
# Strictly speaking, this means the affected counties will change their | |
# clocks twice that night, but this obviously is in error. The intent | |
# is that 01:59:59 EST be followed by 02:00:00 CDT. | |
# From Gwillim Law (2007-02-10): | |
# The Associated Press has been reporting that Pulaski County, Indiana is | |
# going to switch from Central to Eastern Time on March 11, 2007.... | |
# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D | |
Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S | |
Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 | |
-6:00 US C%sT 1920 | |
-6:00 Indianapolis C%sT 1942 | |
-6:00 US C%sT 1946 | |
-6:00 Indianapolis C%sT 1955 Apr 24 2:00 | |
-5:00 - EST 1957 Sep 29 2:00 | |
-6:00 - CST 1958 Apr 27 2:00 | |
-5:00 - EST 1969 | |
-5:00 US E%sT 1971 | |
-5:00 - EST 2006 | |
-5:00 US E%sT | |
# | |
# Eastern Crawford County, Indiana, left its clocks alone in 1974, | |
# as well as from 1976 through 2005. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D | |
Rule Marengo 1951 only - Sep lastSun 2:00 0 S | |
Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D | |
Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 | |
-6:00 US C%sT 1951 | |
-6:00 Marengo C%sT 1961 Apr 30 2:00 | |
-5:00 - EST 1969 | |
-5:00 US E%sT 1974 Jan 6 2:00 | |
-6:00 1:00 CDT 1974 Oct 27 2:00 | |
-5:00 US E%sT 1976 | |
-5:00 - EST 2006 | |
-5:00 US E%sT | |
# | |
# Daviess, Dubois, Knox, and Martin Counties, Indiana, | |
# switched from eastern to central time in April 2006, then switched back | |
# in November 2007. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D | |
Rule Vincennes 1946 only - Sep lastSun 2:00 0 S | |
Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D | |
Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S | |
Rule Vincennes 1955 only - May 1 0:00 1:00 D | |
Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D | |
Rule Vincennes 1960 only - Oct lastSun 2:00 0 S | |
Rule Vincennes 1961 only - Sep lastSun 2:00 0 S | |
Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 | |
-6:00 US C%sT 1946 | |
-6:00 Vincennes C%sT 1964 Apr 26 2:00 | |
-5:00 - EST 1969 | |
-5:00 US E%sT 1971 | |
-5:00 - EST 2006 Apr 2 2:00 | |
-6:00 US C%sT 2007 Nov 4 2:00 | |
-5:00 US E%sT | |
# | |
# Perry County, Indiana, switched from eastern to central time in April 2006. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Perry 1946 only - Apr lastSun 2:00 1:00 D | |
Rule Perry 1946 only - Sep lastSun 2:00 0 S | |
Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D | |
Rule Perry 1953 1959 - Sep lastSun 2:00 0 S | |
Rule Perry 1955 only - May 1 0:00 1:00 D | |
Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D | |
Rule Perry 1960 only - Oct lastSun 2:00 0 S | |
Rule Perry 1961 only - Sep lastSun 2:00 0 S | |
Rule Perry 1962 1963 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 | |
-6:00 US C%sT 1946 | |
-6:00 Perry C%sT 1964 Apr 26 2:00 | |
-5:00 - EST 1969 | |
-5:00 US E%sT 1971 | |
-5:00 - EST 2006 Apr 2 2:00 | |
-6:00 US C%sT | |
# | |
# Pike County, Indiana moved from central to eastern time in 1977, | |
# then switched back in 2006, then switched back again in 2007. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Pike 1955 only - May 1 0:00 1:00 D | |
Rule Pike 1955 1960 - Sep lastSun 2:00 0 S | |
Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D | |
Rule Pike 1961 1964 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 | |
-6:00 US C%sT 1955 | |
-6:00 Pike C%sT 1965 Apr 25 2:00 | |
-5:00 - EST 1966 Oct 30 2:00 | |
-6:00 US C%sT 1977 Oct 30 2:00 | |
-5:00 - EST 2006 Apr 2 2:00 | |
-6:00 US C%sT 2007 Nov 4 2:00 | |
-5:00 US E%sT | |
# | |
# Starke County, Indiana moved from central to eastern time in 1991, | |
# then switched back in 2006. | |
# From Arthur David Olson (1991-10-28): | |
# An article on page A3 of the Sunday, 1991-10-27 Washington Post | |
# notes that Starke County switched from Central time to Eastern time as of | |
# 1991-10-27. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D | |
Rule Starke 1947 1954 - Sep lastSun 2:00 0 S | |
Rule Starke 1955 1956 - Oct lastSun 2:00 0 S | |
Rule Starke 1957 1958 - Sep lastSun 2:00 0 S | |
Rule Starke 1959 1961 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 | |
-6:00 US C%sT 1947 | |
-6:00 Starke C%sT 1962 Apr 29 2:00 | |
-5:00 - EST 1963 Oct 27 2:00 | |
-6:00 US C%sT 1991 Oct 27 2:00 | |
-5:00 - EST 2006 Apr 2 2:00 | |
-6:00 US C%sT | |
# | |
# Pulaski County, Indiana, switched from eastern to central time in | |
# April 2006 and then switched back in March 2007. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D | |
Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S | |
Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S | |
Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 | |
-6:00 US C%sT 1946 | |
-6:00 Pulaski C%sT 1961 Apr 30 2:00 | |
-5:00 - EST 1969 | |
-5:00 US E%sT 1971 | |
-5:00 - EST 2006 Apr 2 2:00 | |
-6:00 US C%sT 2007 Mar 11 2:00 | |
-5:00 US E%sT | |
# | |
# Switzerland County, Indiana, did not observe DST from 1973 through 2005. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 | |
-6:00 US C%sT 1954 Apr 25 2:00 | |
-5:00 - EST 1969 | |
-5:00 US E%sT 1973 | |
-5:00 - EST 2006 | |
-5:00 US E%sT | |
# Part of Kentucky left its clocks alone in 1974. | |
# This also includes Clark, Floyd, and Harrison counties in Indiana. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Louisville 1921 only - May 1 2:00 1:00 D | |
Rule Louisville 1921 only - Sep 1 2:00 0 S | |
Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D | |
Rule Louisville 1941 only - Sep lastSun 2:00 0 S | |
Rule Louisville 1946 only - Jun 2 2:00 0 S | |
Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S | |
Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 | |
-6:00 US C%sT 1921 | |
-6:00 Louisville C%sT 1942 | |
-6:00 US C%sT 1946 | |
-6:00 Louisville C%sT 1961 Jul 23 2:00 | |
-5:00 - EST 1968 | |
-5:00 US E%sT 1974 Jan 6 2:00 | |
-6:00 1:00 CDT 1974 Oct 27 2:00 | |
-5:00 US E%sT | |
# | |
# Wayne County, Kentucky | |
# | |
# From | |
# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> | |
# Lake Cumberland LIFE | |
# </a> (1999-01-29) via WKYM-101.7: | |
# Clinton County has joined Wayne County in asking the DoT to change from | |
# the Central to the Eastern time zone.... The Wayne County government made | |
# the same request in December. And while Russell County officials have not | |
# taken action, the majority of respondents to a poll conducted there in | |
# August indicated they would like to change to "fast time" also. | |
# The three Lake Cumberland counties are the farthest east of any U.S. | |
# location in the Central time zone. | |
# | |
# From Rich Wales (2000-08-29): | |
# After prolonged debate, and despite continuing deep differences of opinion, | |
# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern | |
# (-0500) time. They won't "fall back" this year. See Sara Shipley, | |
# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). | |
# | |
# From Paul Eggert (2001-07-16): | |
# The final rule was published in the | |
# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> | |
# Federal Register 65, 160 (2000-08-17), page 50154-50158. | |
# </a> | |
# | |
Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 | |
-6:00 US C%sT 1946 | |
-6:00 - CST 1968 | |
-6:00 US C%sT 2000 Oct 29 2:00 | |
-5:00 US E%sT | |
# From Rives McDow (2000-08-30): | |
# Here ... are all the changes in the US since 1985. | |
# Kearny County, KS (put all of county on central; | |
# previously split between MST and CST) ... 1990-10 | |
# Starke County, IN (from CST to EST) ... 1991-10 | |
# Oliver County, ND (from MST to CST) ... 1992-10 | |
# West Wendover, NV (from PST TO MST) ... 1999-10 | |
# Wayne County, KY (from CST to EST) ... 2000-10 | |
# | |
# From Paul Eggert (2001-07-17): | |
# We don't know where the line used to be within Kearny County, KS, | |
# so omit that change for now. | |
# See America/Indiana/Knox for the Starke County, IN change. | |
# See America/North_Dakota/Center for the Oliver County, ND change. | |
# West Wendover, NV officially switched from Pacific to mountain time on | |
# 1999-10-31. See the | |
# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> | |
# Federal Register 64, 203 (1999-10-21), page 56705-56707. | |
# </a> | |
# However, the Federal Register says that West Wendover already operated | |
# on mountain time, and the rule merely made this official; | |
# hence a separate tz entry is not needed. | |
# Michigan | |
# | |
# From Bob Devine (1988-01-28): | |
# Michigan didn't observe DST from 1968 to 1973. | |
# | |
# From Paul Eggert (1999-03-31): | |
# Shanks writes that Michigan started using standard time on 1885-09-18, | |
# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) | |
# that Detroit kept | |
# | |
# local time until 1900 when the City Council decreed that clocks should | |
# be put back twenty-eight minutes to Central Standard Time. Half the | |
# city obeyed, half refused. After considerable debate, the decision | |
# was rescinded and the city reverted to Sun time. A derisive offer to | |
# erect a sundial in front of the city hall was referred to the | |
# Committee on Sewers. Then, in 1905, Central time was adopted | |
# by city vote. | |
# | |
# This story is too entertaining to be false, so go with Howse over Shanks. | |
# | |
# From Paul Eggert (2001-03-06): | |
# Garland (1927) writes ``Cleveland and Detroit advanced their clocks | |
# one hour in 1914.'' This change is not in Shanks. We have no more | |
# info, so omit this for now. | |
# | |
# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D | |
Rule Detroit 1948 only - Sep lastSun 2:00 0 S | |
Rule Detroit 1967 only - Jun 14 2:00 1:00 D | |
Rule Detroit 1967 only - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Detroit -5:32:11 - LMT 1905 | |
-6:00 - CST 1915 May 15 2:00 | |
-5:00 - EST 1942 | |
-5:00 US E%sT 1946 | |
-5:00 Detroit E%sT 1973 | |
-5:00 US E%sT 1975 | |
-5:00 - EST 1975 Apr 27 2:00 | |
-5:00 US E%sT | |
# | |
# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, | |
# switched from EST to CST/CDT in 1973. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER | |
Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D | |
Rule Menominee 1946 only - Sep lastSun 2:00 0 S | |
Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D | |
Rule Menominee 1966 only - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 | |
-6:00 US C%sT 1946 | |
-6:00 Menominee C%sT 1969 Apr 27 2:00 | |
-5:00 - EST 1973 Apr 29 2:00 | |
-6:00 US C%sT | |
# Navassa | |
# administered by the US Fish and Wildlife Service | |
# claimed by US under the provisions of the 1856 Guano Islands Act | |
# also claimed by Haiti | |
# occupied 1857/1900 by the Navassa Phosphate Co | |
# US lighthouse 1917/1996-09 | |
# currently uninhabited | |
# see Mark Fineman, ``An Isle Rich in Guano and Discord'', | |
# _Los Angeles Times_ (1998-11-10), A1, A10; it cites | |
# Jimmy Skaggs, _The Great Guano Rush_ (1994). | |
################################################################################ | |
# From Paul Eggert (2006-03-22): | |
# A good source for time zone historical data outside the U.S. is | |
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), | |
# San Diego: ACS Publications, Inc. (2003). | |
# | |
# Gwillim Law writes that a good source | |
# for recent time zone data is the International Air Transport | |
# Association's Standard Schedules Information Manual (IATA SSIM), | |
# published semiannually. Law sent in several helpful summaries | |
# of the IATA's data after 1990. | |
# | |
# Except where otherwise noted, Shanks & Pottenger is the source for | |
# entries through 1990, and IATA SSIM is the source for entries afterwards. | |
# | |
# Other sources occasionally used include: | |
# | |
# Edward W. Whitman, World Time Differences, | |
# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), | |
# which I found in the UCLA library. | |
# | |
# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> | |
# William Willett, The Waste of Daylight, 19th edition | |
# </a> (1914-03) | |
# | |
# See the `europe' file for Greenland. | |
# Canada | |
# From Alain LaBont<e'> (1994-11-14): | |
# I post here the time zone abbreviations standardized in Canada | |
# for both English and French in the CAN/CSA-Z234.4-89 standard.... | |
# | |
# UTC Standard time Daylight savings time | |
# offset French English French English | |
# -2:30 - - HAT NDT | |
# -3 - - HAA ADT | |
# -3:30 HNT NST - - | |
# -4 HNA AST HAE EDT | |
# -5 HNE EST HAC CDT | |
# -6 HNC CST HAR MDT | |
# -7 HNR MST HAP PDT | |
# -8 HNP PST HAY YDT | |
# -9 HNY YST - - | |
# | |
# HN: Heure Normale ST: Standard Time | |
# HA: Heure Avanc<e'>e DT: Daylight saving Time | |
# | |
# A: de l'Atlantique Atlantic | |
# C: du Centre Central | |
# E: de l'Est Eastern | |
# M: Mountain | |
# N: Newfoundland | |
# P: du Pacifique Pacific | |
# R: des Rocheuses | |
# T: de Terre-Neuve | |
# Y: du Yukon Yukon | |
# | |
# From Paul Eggert (1994-11-22): | |
# Alas, this sort of thing must be handled by localization software. | |
# Unless otherwise specified, the data for Canada are all from Shanks | |
# & Pottenger. | |
# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, | |
# 2007-03-01): | |
# The British Columbia government announced yesterday that it will | |
# adjust daylight savings next year to align with changes in the | |
# U.S. and the rest of Canada.... | |
# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm | |
# ... | |
# Nova Scotia | |
# Daylight saving time will be extended by four weeks starting in 2007.... | |
# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf | |
# | |
# [For New Brunswick] the new legislation dictates that the time change is to | |
# be done at 02:00 instead of 00:01. | |
# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf | |
# ... | |
# Manitoba has traditionally changed the clock every fall at 03:00. | |
# As of 2006, the transition is to take place one hour earlier at 02:00. | |
# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php | |
# ... | |
# [Alberta, Ontario, Quebec] will follow US rules. | |
# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM | |
# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm | |
# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF | |
# ... | |
# P.E.I. will follow US rules.... | |
# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf | |
# ... | |
# Province of Newfoundland and Labrador.... | |
# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm | |
# ... | |
# Yukon | |
# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf | |
# ... | |
# N.W.T. will follow US rules. Whoever maintains the government web site | |
# does not seem to believe in bookmarks. To see the news release, click the | |
# following link and search for "Daylight Savings Time Change". Press the | |
# "Daylight Savings Time Change" link; it will fire off a popup using | |
# JavaScript. | |
# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive | |
# ... | |
# Nunavut | |
# An amendment to the Interpretation Act was registered on February 19/2007.... | |
# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf | |
# From Paul Eggert (2006-04-25): | |
# H. David Matthews and Mary Vincent's map | |
# <a href="http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp"> | |
# "It's about TIME", _Canadian Geographic_ (September-October 1998) | |
# </a> contains detailed boundaries for regions observing nonstandard | |
# time and daylight saving time arrangements in Canada circa 1998. | |
# | |
# INMS, the Institute for National Measurement Standards in Ottawa, has <a | |
# href="http://inms-ienm.nrc-cnrc.gc.ca/en/time_services/daylight_saving_e.php"> | |
# information about standard and daylight saving time zones in Canada. | |
# </a> (updated periodically). | |
# Its unofficial information is often taken from Matthews and Vincent. | |
# From Paul Eggert (2006-06-27): | |
# For now, assume all of DST-observing Canada will fall into line with the | |
# new US DST rules, | |
# From Chris Walton (2011-12-01) | |
# In the first of Tammy Hardwick's articles | |
# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> | |
# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 | |
# </a> | |
# she quotes the Friday November 1/1918 edition of the Creston Review. | |
# The quote includes these two statements: | |
# 'Sunday the CPR went back to the old system of time...' | |
# '... The daylight saving scheme was dropped all over Canada at the same time,' | |
# These statements refer to a transition from daylight time to standard time | |
# that occurred nationally on Sunday October 27/1918. This transition was | |
# also documented in the Saturday October 26/1918 edition of the Toronto Star. | |
# In light of that evidence, we alter the date from the earlier believed | |
# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day | |
# than Thursday) in all Canadian rulesets. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Canada 1918 only - Apr 14 2:00 1:00 D | |
Rule Canada 1918 only - Oct 27 2:00 0 S | |
Rule Canada 1942 only - Feb 9 2:00 1:00 W # War | |
Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace | |
Rule Canada 1945 only - Sep 30 2:00 0 S | |
Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D | |
Rule Canada 1974 2006 - Oct lastSun 2:00 0 S | |
Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D | |
Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D | |
Rule Canada 2007 max - Nov Sun>=1 2:00 0 S | |
# Newfoundland and Labrador | |
# From Paul Eggert (2000-10-02): | |
# Matthews and Vincent (1998) write that Labrador should use NST/NDT, | |
# but the only part of Labrador that follows the rules is the | |
# southeast corner, including Port Hope Simpson and Mary's Harbour, | |
# but excluding, say, Black Tickle. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule StJohns 1917 only - Apr 8 2:00 1:00 D | |
Rule StJohns 1917 only - Sep 17 2:00 0 S | |
# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. | |
Rule StJohns 1919 only - May 5 23:00 1:00 D | |
Rule StJohns 1919 only - Aug 12 23:00 0 S | |
# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. | |
Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D | |
Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S | |
# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & | |
# Pottenger. | |
Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D | |
Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S | |
# Whitman gives the following transitions: | |
# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 | |
# but go with Shanks & Pottenger and assume they used Canadian rules. | |
# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives | |
# Apr 30 - Sep 24; go with Shanks & Pottenger. | |
Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D | |
Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S | |
Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D | |
Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S | |
Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S | |
# From Paul Eggert (2000-10-02): | |
# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches | |
# at 00:01 local time. For now, assume it started in 1987. | |
# From Michael Pelley (2011-09-12): | |
# We received today, Monday, September 12, 2011, notification that the | |
# changes to the Newfoundland Standard Time Act have been proclaimed. | |
# The change in the Act stipulates that the change from Daylight Savings | |
# Time to Standard Time and from Standard Time to Daylight Savings Time | |
# now occurs at 2:00AM. | |
# ... | |
# <a href="http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm"> | |
# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm | |
# </a> | |
# ... | |
# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery | |
# Office of the Chief Information Officer | |
# Executive Council | |
# Government of Newfoundland & Labrador | |
Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D | |
Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S | |
Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD | |
Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D | |
Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D | |
Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S | |
# | |
# St John's has an apostrophe, but Posix file names can't have apostrophes. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/St_Johns -3:30:52 - LMT 1884 | |
-3:30:52 StJohns N%sT 1918 | |
-3:30:52 Canada N%sT 1919 | |
-3:30:52 StJohns N%sT 1935 Mar 30 | |
-3:30 StJohns N%sT 1942 May 11 | |
-3:30 Canada N%sT 1946 | |
-3:30 StJohns N%sT 2011 Nov | |
-3:30 Canada N%sT | |
# most of east Labrador | |
# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay | |
-3:30:52 - NST 1918 | |
-3:30:52 Canada N%sT 1919 | |
-3:30:52 - NST 1935 Mar 30 | |
-3:30 - NST 1936 | |
-3:30 StJohns N%sT 1942 May 11 | |
-3:30 Canada N%sT 1946 | |
-3:30 StJohns N%sT 1966 Mar 15 2:00 | |
-4:00 StJohns A%sT 2011 Nov | |
-4:00 Canada A%sT | |
# west Labrador, Nova Scotia, Prince Edward I | |
# From Paul Eggert (2006-03-22): | |
# Shanks & Pottenger write that since 1970 most of this region has been like | |
# Halifax. Many locales did not observe peacetime DST until 1972; | |
# Glace Bay, NS is the largest that we know of. | |
# Shanks & Pottenger also write that Liverpool, NS was the only town | |
# in Canada to observe DST in 1971 but not 1970; for now we'll assume | |
# this is a typo. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Halifax 1916 only - Apr 1 0:00 1:00 D | |
Rule Halifax 1916 only - Oct 1 0:00 0 S | |
Rule Halifax 1920 only - May 9 0:00 1:00 D | |
Rule Halifax 1920 only - Aug 29 0:00 0 S | |
Rule Halifax 1921 only - May 6 0:00 1:00 D | |
Rule Halifax 1921 1922 - Sep 5 0:00 0 S | |
Rule Halifax 1922 only - Apr 30 0:00 1:00 D | |
Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D | |
Rule Halifax 1923 only - Sep 4 0:00 0 S | |
Rule Halifax 1924 only - Sep 15 0:00 0 S | |
Rule Halifax 1925 only - Sep 28 0:00 0 S | |
Rule Halifax 1926 only - May 16 0:00 1:00 D | |
Rule Halifax 1926 only - Sep 13 0:00 0 S | |
Rule Halifax 1927 only - May 1 0:00 1:00 D | |
Rule Halifax 1927 only - Sep 26 0:00 0 S | |
Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D | |
Rule Halifax 1928 only - Sep 9 0:00 0 S | |
Rule Halifax 1929 only - Sep 3 0:00 0 S | |
Rule Halifax 1930 only - Sep 15 0:00 0 S | |
Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S | |
Rule Halifax 1932 only - May 1 0:00 1:00 D | |
Rule Halifax 1933 only - Apr 30 0:00 1:00 D | |
Rule Halifax 1933 only - Oct 2 0:00 0 S | |
Rule Halifax 1934 only - May 20 0:00 1:00 D | |
Rule Halifax 1934 only - Sep 16 0:00 0 S | |
Rule Halifax 1935 only - Jun 2 0:00 1:00 D | |
Rule Halifax 1935 only - Sep 30 0:00 0 S | |
Rule Halifax 1936 only - Jun 1 0:00 1:00 D | |
Rule Halifax 1936 only - Sep 14 0:00 0 S | |
Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D | |
Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S | |
Rule Halifax 1939 only - May 28 0:00 1:00 D | |
Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D | |
Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D | |
Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S | |
Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D | |
Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S | |
Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D | |
Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S | |
Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D | |
Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 | |
-4:00 Halifax A%sT 1918 | |
-4:00 Canada A%sT 1919 | |
-4:00 Halifax A%sT 1942 Feb 9 2:00s | |
-4:00 Canada A%sT 1946 | |
-4:00 Halifax A%sT 1974 | |
-4:00 Canada A%sT | |
Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 | |
-4:00 Canada A%sT 1953 | |
-4:00 Halifax A%sT 1954 | |
-4:00 - AST 1972 | |
-4:00 Halifax A%sT 1974 | |
-4:00 Canada A%sT | |
# New Brunswick | |
# From Paul Eggert (2007-01-31): | |
# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> | |
# says they changed at 00:01 through 2006, and | |
# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it | |
# clear that this was the case since at least 1993. | |
# For now, assume it started in 1993. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D | |
Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S | |
Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D | |
Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S | |
Rule Moncton 1939 only - May 27 1:00 1:00 D | |
Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S | |
Rule Moncton 1940 only - May 19 1:00 1:00 D | |
Rule Moncton 1941 only - May 4 1:00 1:00 D | |
Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D | |
Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S | |
Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S | |
Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D | |
Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 | |
-5:00 - EST 1902 Jun 15 | |
-4:00 Canada A%sT 1933 | |
-4:00 Moncton A%sT 1942 | |
-4:00 Canada A%sT 1946 | |
-4:00 Moncton A%sT 1973 | |
-4:00 Canada A%sT 1993 | |
-4:00 Moncton A%sT 2007 | |
-4:00 Canada A%sT | |
# Quebec | |
# From Paul Eggert (2006-07-09): | |
# Shanks & Pottenger write that since 1970 most of Quebec has been | |
# like Montreal. | |
# From Paul Eggert (2006-06-27): | |
# Matthews and Vincent (1998) also write that Quebec east of the -63 | |
# meridian is supposed to observe AST, but residents as far east as | |
# Natashquan use EST/EDT, and residents east of Natashquan use AST. | |
# In "Official time in Quebec" the Quebec department of justice writes in | |
# http://www.justice.gouv.qc.ca/english/publications/generale/temps-regl-1-a.htm | |
# that "The residents of the Municipality of the | |
# Cote-Nord-du-Golfe-Saint-Laurent and the municipalities of Saint-Augustin, | |
# Bonne-Esperance and Blanc-Sablon apply the Official Time Act as it is | |
# written and use Atlantic standard time all year round. The same applies to | |
# the residents of the Native facilities along the lower North Shore." | |
# <http://www.assnat.qc.ca/eng/37legislature2/Projets-loi/Publics/06-a002.htm> | |
# says this common practice was codified into law as of 2007. | |
# For lack of better info, guess this practice began around 1970, contra to | |
# Shanks & Pottenger who have this region observing AST/ADT. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Mont 1917 only - Mar 25 2:00 1:00 D | |
Rule Mont 1917 only - Apr 24 0:00 0 S | |
Rule Mont 1919 only - Mar 31 2:30 1:00 D | |
Rule Mont 1919 only - Oct 25 2:30 0 S | |
Rule Mont 1920 only - May 2 2:30 1:00 D | |
Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S | |
Rule Mont 1921 only - May 1 2:00 1:00 D | |
Rule Mont 1922 only - Apr 30 2:00 1:00 D | |
Rule Mont 1924 only - May 17 2:00 1:00 D | |
Rule Mont 1924 1926 - Sep lastSun 2:30 0 S | |
Rule Mont 1925 1926 - May Sun>=1 2:00 1:00 D | |
# The 1927-to-1937 rules can be expressed more simply as | |
# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D | |
# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S | |
# The rules below avoid use of 24:00 | |
# (which pre-1998 versions of zic cannot handle). | |
Rule Mont 1927 only - May 1 0:00 1:00 D | |
Rule Mont 1927 1932 - Sep lastSun 0:00 0 S | |
Rule Mont 1928 1931 - Apr lastSun 0:00 1:00 D | |
Rule Mont 1932 only - May 1 0:00 1:00 D | |
Rule Mont 1933 1940 - Apr lastSun 0:00 1:00 D | |
Rule Mont 1933 only - Oct 1 0:00 0 S | |
Rule Mont 1934 1939 - Sep lastSun 0:00 0 S | |
Rule Mont 1946 1973 - Apr lastSun 2:00 1:00 D | |
Rule Mont 1945 1948 - Sep lastSun 2:00 0 S | |
Rule Mont 1949 1950 - Oct lastSun 2:00 0 S | |
Rule Mont 1951 1956 - Sep lastSun 2:00 0 S | |
Rule Mont 1957 1973 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Blanc-Sablon -3:48:28 - LMT 1884 | |
-4:00 Canada A%sT 1970 | |
-4:00 - AST | |
Zone America/Montreal -4:54:16 - LMT 1884 | |
-5:00 Mont E%sT 1918 | |
-5:00 Canada E%sT 1919 | |
-5:00 Mont E%sT 1942 Feb 9 2:00s | |
-5:00 Canada E%sT 1946 | |
-5:00 Mont E%sT 1974 | |
-5:00 Canada E%sT | |
# Ontario | |
# From Paul Eggert (2006-07-09): | |
# Shanks & Pottenger write that since 1970 most of Ontario has been like | |
# Toronto. | |
# Thunder Bay skipped DST in 1973. | |
# Many smaller locales did not observe peacetime DST until 1974; | |
# Nipigon (EST) and Rainy River (CST) are the largest that we know of. | |
# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. | |
# From Mark Brader (2003-07-26): | |
# [According to the Toronto Star] Orillia, Ontario, adopted DST | |
# effective Saturday, 1912-06-22, 22:00; the article mentions that | |
# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw | |
# have already done so. In Orillia DST was to run until Saturday, | |
# 1912-08-31 (no time mentioned), but it was met with considerable | |
# hostility from certain segments of the public, and was revoked after | |
# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but | |
# presumably that should be -07-06. (1912-06-19, -07-12; also letters | |
# earlier in June). | |
# | |
# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). | |
# From Paul Eggert (1997-10-17): | |
# Mark Brader writes that an article in the 1997-10-14 Toronto Star | |
# says that Atikokan, Ontario currently does not observe DST, | |
# but will vote on 11-10 whether to use EST/EDT. | |
# He also writes that the | |
# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> | |
# Ontario Time Act (1990, Chapter T.9) | |
# </a> | |
# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. | |
# Officially Atikokan is therefore on CST/CDT, and most likely this report | |
# concerns a non-official time observed as a matter of local practice. | |
# | |
# From Paul Eggert (2000-10-02): | |
# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and | |
# New Osnaburgh observe CST all year, that Big Trout Lake observes | |
# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in | |
# violation of the official Ontario rules. | |
# | |
# From Paul Eggert (2006-07-09): | |
# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the | |
# 2005-07-21 Chronicle-Journal, which said: | |
# | |
# The clocks in Atikokan stay set on standard time year-round. | |
# This means they spend about half the time on central time and | |
# the other half on eastern time. | |
# | |
# For the most part, the system works, Mayor Dennis Brown said. | |
# | |
# "The majority of businesses in Atikokan deal more with Eastern | |
# Canada, but there are some that deal with Western Canada," he | |
# said. "I don't see any changes happening here." | |
# | |
# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang | |
# [New Osnaburgh] follow the same practice." | |
# From Garry McKinnon (2006-07-14) via Chris Walton: | |
# I chatted with a member of my board who has an outstanding memory | |
# and a long history in Atikokan (and in the telecom industry) and he | |
# can say for certain that Atikokan has been practicing the current | |
# time keeping since 1952, at least. | |
# From Paul Eggert (2006-07-17): | |
# Shanks & Pottenger say that Atikokan has agreed with Rainy River | |
# ever since standard time was introduced, but the information from | |
# McKinnon sounds more authoritative. For now, assume that Atikokan | |
# switched to EST immediately after WWII era daylight saving time | |
# ended. This matches the old (less-populous) America/Coral_Harbour | |
# entry since our cutoff date of 1970, so we can move | |
# America/Coral_Harbour to the 'backward' file. | |
# From Mark Brader (2010-03-06): | |
# | |
# Currently the database has: | |
# | |
# # Ontario | |
# | |
# # From Paul Eggert (2006-07-09): | |
# # Shanks & Pottenger write that since 1970 most of Ontario has been like | |
# # Toronto. | |
# # Thunder Bay skipped DST in 1973. | |
# # Many smaller locales did not observe peacetime DST until 1974; | |
# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. | |
# | |
# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom | |
# right corner of page 1, it says that Toronto will return to standard | |
# time at 2 am Sunday morning (which agrees with the database), and that: | |
# | |
# The one-hour setback will go into effect throughout most of Ontario, | |
# except in areas like Windsor which remains on standard time all year. | |
# | |
# Windsor is, of course, a lot larger than Nipigon. | |
# | |
# I only came across this incidentally. I don't know if Windsor began | |
# observing DST when Detroit did, or in 1974, or on some other date. | |
# | |
# By the way, the article continues by noting that: | |
# | |
# Some cities in the United States have pushed the deadline back | |
# three weeks and will change over from daylight saving in October. | |
# From Arthur David Olson (2010-07-17): | |
# | |
# "Standard Time and Time Zones in Canada" appeared in | |
# The Journal of The Royal Astronomical Society of Canada, | |
# volume 26, number 2 (February 1932) and, as of 2010-07-17, | |
# was available at | |
# <a href="http://adsabs.harvard.edu/full/1932JRASC..26...49S"> | |
# http://adsabs.harvard.edu/full/1932JRASC..26...49S | |
# </a> | |
# | |
# It includes the text below (starting on page 57): | |
# | |
# A list of the places in Canada using daylight saving time would | |
# require yearly revision. From information kindly furnished by | |
# the provincial governments and by the postmasters in many cities | |
# and towns, it is found that the following places used daylight sav- | |
# ing in 1930. The information for the province of Quebec is definite, | |
# for the other provinces only approximate: | |
# | |
# Province Daylight saving time used | |
# Prince Edward Island Not used. | |
# Nova Scotia In Halifax only. | |
# New Brunswick In St. John only. | |
# Quebec In the following places: | |
# Montreal Lachine | |
# Quebec Mont-Royal | |
# Levis Iberville | |
# St. Lambert Cap de la Madeleine | |
# Verdun Loretteville | |
# Westmount Richmond | |
# Outremont St. Jerome | |
# Longueuil Greenfield Park | |
# Arvida Waterloo | |
# Chambly-Canton Beaulieu | |
# Melbourne La Tuque | |
# St. Theophile Buckingham | |
# Ontario Used generally in the cities and towns along | |
# the southerly part of the province. Not | |
# used in the northwesterlhy part. | |
# Manitoba Not used. | |
# Saskatchewan In Regina only. | |
# Alberta Not used. | |
# British Columbia Not used. | |
# | |
# With some exceptions, the use of daylight saving may be said to be limited | |
# to those cities and towns lying between Quebec city and Windsor, Ont. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Toronto 1919 only - Mar 30 23:30 1:00 D | |
Rule Toronto 1919 only - Oct 26 0:00 0 S | |
Rule Toronto 1920 only - May 2 2:00 1:00 D | |
Rule Toronto 1920 only - Sep 26 0:00 0 S | |
Rule Toronto 1921 only - May 15 2:00 1:00 D | |
Rule Toronto 1921 only - Sep 15 2:00 0 S | |
Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D | |
# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" | |
# was meant. | |
Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S | |
Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D | |
# The 1927-to-1939 rules can be expressed more simply as | |
# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S | |
# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D | |
# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D | |
# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S | |
# The rules below avoid use of Sun>=25 | |
# (which pre-2004 versions of zic cannot handle). | |
Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S | |
Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D | |
Rule Toronto 1932 only - May 1 2:00 1:00 D | |
Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D | |
Rule Toronto 1933 only - Oct 1 2:00 0 S | |
Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S | |
Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S | |
Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D | |
Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D | |
Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S | |
Rule Toronto 1949 only - Nov lastSun 0:00 0 S | |
Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D | |
Rule Toronto 1950 only - Nov lastSun 2:00 0 S | |
Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S | |
# Shanks & Pottenger say Toronto ended DST a week early in 1971, | |
# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this | |
# is wrong, and that he had confirmed it by checking the 1971-10-30 | |
# Toronto Star, which said that DST was ending 1971-10-31 as usual. | |
Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S | |
# From Paul Eggert (2003-07-27): | |
# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and | |
# Port Arthur, Ontario, the principle of the Bill has been in | |
# operation for the past three years, and in the City of Moose Jaw, | |
# Saskatchewan, for one year." | |
# From David Bryan via Tory Tronrud, Director/Curator, | |
# Thunder Bay Museum (2003-11-12): | |
# There is some suggestion, however, that, by-law or not, daylight | |
# savings time was being practiced in Fort William and Port Arthur | |
# before 1909.... [I]n 1910, the line between the Eastern and Central | |
# Time Zones was permanently moved about two hundred miles west to | |
# include the Thunder Bay area.... When Canada adopted daylight | |
# savings time in 1916, Fort William and Port Arthur, having done so | |
# already, did not change their clocks.... During the Second World | |
# War,... [t]he cities agreed to implement DST during the summer | |
# months for the remainder of the war years. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Toronto -5:17:32 - LMT 1895 | |
-5:00 Canada E%sT 1919 | |
-5:00 Toronto E%sT 1942 Feb 9 2:00s | |
-5:00 Canada E%sT 1946 | |
-5:00 Toronto E%sT 1974 | |
-5:00 Canada E%sT | |
Zone America/Thunder_Bay -5:57:00 - LMT 1895 | |
-6:00 - CST 1910 | |
-5:00 - EST 1942 | |
-5:00 Canada E%sT 1970 | |
-5:00 Mont E%sT 1973 | |
-5:00 - EST 1974 | |
-5:00 Canada E%sT | |
Zone America/Nipigon -5:53:04 - LMT 1895 | |
-5:00 Canada E%sT 1940 Sep 29 | |
-5:00 1:00 EDT 1942 Feb 9 2:00s | |
-5:00 Canada E%sT | |
Zone America/Rainy_River -6:18:16 - LMT 1895 | |
-6:00 Canada C%sT 1940 Sep 29 | |
-6:00 1:00 CDT 1942 Feb 9 2:00s | |
-6:00 Canada C%sT | |
Zone America/Atikokan -6:06:28 - LMT 1895 | |
-6:00 Canada C%sT 1940 Sep 29 | |
-6:00 1:00 CDT 1942 Feb 9 2:00s | |
-6:00 Canada C%sT 1945 Sep 30 2:00 | |
-5:00 - EST | |
# Manitoba | |
# From Rob Douglas (2006-04-06): | |
# the old Manitoba Time Act - as amended by Bill 2, assented to | |
# March 27, 1987 ... said ... | |
# "between two o'clock Central Standard Time in the morning of | |
# the first Sunday of April of each year and two o'clock Central | |
# Standard Time in the morning of the last Sunday of October next | |
# following, one hour in advance of Central Standard Time."... | |
# I believe that the English legislation [of the old time act] had = | |
# been assented to (March 22, 1967).... | |
# Also, as far as I can tell, there was no order-in-council varying | |
# the time of Daylight Saving Time for 2005 and so the provisions of | |
# the 1987 version would apply - the changeover was at 2:00 Central | |
# Standard Time (i.e. not until 3:00 Central Daylight Time). | |
# From Paul Eggert (2006-04-10): | |
# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) | |
# starting 1966. Since 02:00s is clearly correct for 1967 on, assume | |
# it was also 02:00s in 1966. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Winn 1916 only - Apr 23 0:00 1:00 D | |
Rule Winn 1916 only - Sep 17 0:00 0 S | |
Rule Winn 1918 only - Apr 14 2:00 1:00 D | |
Rule Winn 1918 only - Oct 27 2:00 0 S | |
Rule Winn 1937 only - May 16 2:00 1:00 D | |
Rule Winn 1937 only - Sep 26 2:00 0 S | |
Rule Winn 1942 only - Feb 9 2:00 1:00 W # War | |
Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace | |
Rule Winn 1945 only - Sep lastSun 2:00 0 S | |
Rule Winn 1946 only - May 12 2:00 1:00 D | |
Rule Winn 1946 only - Oct 13 2:00 0 S | |
Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D | |
Rule Winn 1947 1949 - Sep lastSun 2:00 0 S | |
Rule Winn 1950 only - May 1 2:00 1:00 D | |
Rule Winn 1950 only - Sep 30 2:00 0 S | |
Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D | |
Rule Winn 1951 1958 - Sep lastSun 2:00 0 S | |
Rule Winn 1959 only - Oct lastSun 2:00 0 S | |
Rule Winn 1960 only - Sep lastSun 2:00 0 S | |
Rule Winn 1963 only - Apr lastSun 2:00 1:00 D | |
Rule Winn 1963 only - Sep 22 2:00 0 S | |
Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D | |
Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S | |
Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 | |
-6:00 Winn C%sT 2006 | |
-6:00 Canada C%sT | |
# Saskatchewan | |
# From Mark Brader (2003-07-26): | |
# The first actual adoption of DST in Canada was at the municipal | |
# level. As the [Toronto] Star put it (1912-06-07), "While people | |
# elsewhere have long been talking of legislation to save daylight, | |
# the city of Moose Jaw [Saskatchewan] has acted on its own hook." | |
# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: | |
# presumably late evening, as below), and would run until "the end of | |
# the summer". The discrepancy between municipal time and railroad | |
# time was noted. | |
# From Paul Eggert (2003-07-27): | |
# Willett (1914-03) notes that DST "has been in operation ... in the | |
# City of Moose Jaw, Saskatchewan, for one year." | |
# From Paul Eggert (2006-03-22): | |
# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. | |
# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. | |
# Other western towns (e.g. Lloydminster) are like Edmonton. | |
# Matthews and Vincent (1998) write that Denare Beach and Creighton | |
# are like Winnipeg, in violation of Saskatchewan law. | |
# From W. Jones (1992-11-06): | |
# The. . .below is based on information I got from our law library, the | |
# provincial archives, and the provincial Community Services department. | |
# A precise history would require digging through newspaper archives, and | |
# since you didn't say what you wanted, I didn't bother. | |
# | |
# Saskatchewan is split by a time zone meridian (105W) and over the years | |
# the boundary became pretty ragged as communities near it reevaluated | |
# their affiliations in one direction or the other. In 1965 a provincial | |
# referendum favoured legislating common time practices. | |
# | |
# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of | |
# Saskatchewan 1978) was proclaimed, and established that the eastern | |
# part of Saskatchewan would use CST year round, that districts in | |
# northwest Saskatchewan would by default follow CST but could opt to | |
# follow Mountain Time rules (thus 1 hour difference in the winter and | |
# zero in the summer), and that districts in southwest Saskatchewan would | |
# by default follow MT but could opt to follow CST. | |
# | |
# It took a few years for the dust to settle (I know one story of a town | |
# on one time zone having its school in another, such that a mom had to | |
# serve her family lunch in two shifts), but presently it seems that only | |
# a few towns on the border with Alberta (e.g. Lloydminster) follow MT | |
# rules any more; all other districts appear to have used CST year round | |
# since sometime in the 1960s. | |
# From Chris Walton (2006-06-26): | |
# The Saskatchewan time act which was last updated in 1996 is about 30 pages | |
# long and rather painful to read. | |
# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Regina 1918 only - Apr 14 2:00 1:00 D | |
Rule Regina 1918 only - Oct 27 2:00 0 S | |
Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D | |
Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S | |
Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D | |
Rule Regina 1937 only - Oct Sun>=8 0:00 0 S | |
Rule Regina 1938 only - Oct Sun>=1 0:00 0 S | |
Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S | |
Rule Regina 1942 only - Feb 9 2:00 1:00 W # War | |
Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace | |
Rule Regina 1945 only - Sep lastSun 2:00 0 S | |
Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D | |
Rule Regina 1946 only - Oct Sun>=8 2:00 0 S | |
Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D | |
Rule Regina 1947 1957 - Sep lastSun 2:00 0 S | |
Rule Regina 1959 only - Apr lastSun 2:00 1:00 D | |
Rule Regina 1959 only - Oct lastSun 2:00 0 S | |
# | |
Rule Swift 1957 only - Apr lastSun 2:00 1:00 D | |
Rule Swift 1957 only - Oct lastSun 2:00 0 S | |
Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D | |
Rule Swift 1959 only - Oct lastSun 2:00 0 S | |
Rule Swift 1960 1961 - Sep lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Regina -6:58:36 - LMT 1905 Sep | |
-7:00 Regina M%sT 1960 Apr lastSun 2:00 | |
-6:00 - CST | |
Zone America/Swift_Current -7:11:20 - LMT 1905 Sep | |
-7:00 Canada M%sT 1946 Apr lastSun 2:00 | |
-7:00 Regina M%sT 1950 | |
-7:00 Swift M%sT 1972 Apr lastSun 2:00 | |
-6:00 - CST | |
# Alberta | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D | |
Rule Edm 1918 only - Oct 27 2:00 0 S | |
Rule Edm 1919 only - May 27 2:00 0 S | |
Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D | |
Rule Edm 1920 only - Oct lastSun 2:00 0 S | |
Rule Edm 1921 1923 - Sep lastSun 2:00 0 S | |
Rule Edm 1942 only - Feb 9 2:00 1:00 W # War | |
Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace | |
Rule Edm 1945 only - Sep lastSun 2:00 0 S | |
Rule Edm 1947 only - Apr lastSun 2:00 1:00 D | |
Rule Edm 1947 only - Sep lastSun 2:00 0 S | |
Rule Edm 1967 only - Apr lastSun 2:00 1:00 D | |
Rule Edm 1967 only - Oct lastSun 2:00 0 S | |
Rule Edm 1969 only - Apr lastSun 2:00 1:00 D | |
Rule Edm 1969 only - Oct lastSun 2:00 0 S | |
Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D | |
Rule Edm 1972 2006 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Edmonton -7:33:52 - LMT 1906 Sep | |
-7:00 Edm M%sT 1987 | |
-7:00 Canada M%sT | |
# British Columbia | |
# From Paul Eggert (2006-03-22): | |
# Shanks & Pottenger write that since 1970 most of this region has | |
# been like Vancouver. | |
# Dawson Creek uses MST. Much of east BC is like Edmonton. | |
# Matthews and Vincent (1998) write that Creston is like Dawson Creek. | |
# It seems though that (re: Creston) is not entirely correct: | |
# From Chris Walton (2011-12-01): | |
# There are two areas within the Canadian province of British Columbia | |
# that do not currently observe daylight saving: | |
# a) The Creston Valley (includes the town of Creston and surrounding area) | |
# b) The eastern half of the Peace River Regional District | |
# (includes the cities of Dawson Creek and Fort St. John) | |
# Earlier this year I stumbled across a detailed article about the time | |
# keeping history of Creston; it was written by Tammy Hardwick who is the | |
# manager of the Creston & District Museum. The article was written in May 2009. | |
# <a href="http://www.ilovecreston.com/?p=articles&t=spec&ar=260"> | |
# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 | |
# </a> | |
# According to the article, Creston has not changed its clocks since June 1918. | |
# i.e. Creston has been stuck on UTC-7 for 93 years. | |
# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. | |
# Unfortunately the exact date for the time change in June 1918 remains | |
# unknown and will be difficult to ascertain. I e-mailed Tammy a few months | |
# ago to ask if Sunday June 2 was a reasonable guess. She said it was just | |
# as plausible as any other date (in June). She also said that after writing the | |
# article she had discovered another time change in 1916; this is the subject | |
# of another article which she wrote in October 2010. | |
# <a href="http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56"> | |
# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 | |
# </a> | |
# Here is a summary of the three clock change events in Creston's history: | |
# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) | |
# Exact date unknown | |
# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) | |
# Exact date in October unknown; Sunday October 1 is a reasonable guess. | |
# 3. June 1918: switch to Pacific Daylight Time (GMT-7) | |
# Exact date in June unknown; Sunday June 2 is a reasonable guess. | |
# note#1: | |
# On Oct 27/1918 when daylight saving ended in the rest of Canada, | |
# Creston did not change its clocks. | |
# note#2: | |
# During WWII when the Federal Government legislated a mandatory clock change, | |
# Creston did not oblige. | |
# note#3: | |
# There is no guarantee that Creston will remain on Mountain Standard Time | |
# (UTC-7) forever. | |
# The subject was debated at least once this year by the town Council. | |
# <a href="http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html"> | |
# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html | |
# </a> | |
# During a period WWII, summer time (Daylight saying) was mandatory in Canada. | |
# In Creston, that was handled by shifting the area to PST (-8:00) then applying | |
# summer time to cause the offset to be -7:00, the same as it had been before | |
# the change. It can be argued that the timezone abbreviation during this | |
# period should be PDT rather than MST, but that doesn't seem important enough | |
# (to anyone) to further complicate the rules. | |
# The transition dates (and times) are guesses. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Vanc 1918 only - Apr 14 2:00 1:00 D | |
Rule Vanc 1918 only - Oct 27 2:00 0 S | |
Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War | |
Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace | |
Rule Vanc 1945 only - Sep 30 2:00 0 S | |
Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D | |
Rule Vanc 1946 only - Oct 13 2:00 0 S | |
Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S | |
Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Vancouver -8:12:28 - LMT 1884 | |
-8:00 Vanc P%sT 1987 | |
-8:00 Canada P%sT | |
Zone America/Dawson_Creek -8:00:56 - LMT 1884 | |
-8:00 Canada P%sT 1947 | |
-8:00 Vanc P%sT 1972 Aug 30 2:00 | |
-7:00 - MST | |
Zone America/Creston -7:46:04 - LMT 1884 | |
-7:00 - MST 1916 Oct 1 | |
-8:00 - PST 1918 Jun 2 | |
-7:00 - MST | |
# Northwest Territories, Nunavut, Yukon | |
# From Paul Eggert (2006-03-22): | |
# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. | |
# Mathew Englander (1996-10-07) gives the following refs: | |
# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, | |
# c. 7 defines Yukon standard time as UTC-9. This is still valid; | |
# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). | |
# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. | |
# * O.I.C. 1980/02 established DST. | |
# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. | |
# Shanks & Pottenger say Yukon's 1973-10-28 switch was at 2:00; go | |
# with Englander. | |
# From Chris Walton (2006-06-26): | |
# Here is a link to the old daylight saving portion of the interpretation | |
# act which was last updated in 1987: | |
# http://www.gov.yk.ca/legislation/regs/oic1987_056.pdf | |
# From Rives McDow (1999-09-04): | |
# Nunavut ... moved ... to incorporate the whole territory into one time zone. | |
# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> | |
# Nunavut moves to single time zone Oct. 31 | |
# </a> | |
# | |
# From Antoine Leca (1999-09-06): | |
# We then need to create a new timezone for the Kitikmeot region of Nunavut | |
# to differentiate it from the Yellowknife region. | |
# From Paul Eggert (1999-09-20): | |
# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> | |
# Basic Facts: The New Territory | |
# </a> (1999) reports that Pangnirtung operates on eastern time, | |
# and that Coral Harbour does not observe DST. We don't know when | |
# Pangnirtung switched to eastern time; we'll guess 1995. | |
# From Rives McDow (1999-11-08): | |
# On October 31, when the rest of Nunavut went to Central time, | |
# Pangnirtung wobbled. Here is the result of their wobble: | |
# | |
# The following businesses and organizations in Pangnirtung use Central Time: | |
# | |
# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, | |
# Eastern Arctic National Parks, A & D Specialist | |
# | |
# The following businesses and organizations in Pangnirtung use Eastern Time: | |
# | |
# Hamlet office, All other businesses, Both schools, Airport operator | |
# | |
# This has made for an interesting situation there, which warranted the news. | |
# No one there that I spoke with seems concerned, or has plans to | |
# change the local methods of keeping time, as it evidently does not | |
# really interfere with any activities or make things difficult locally. | |
# They plan to celebrate New Year's turn-over twice, one hour apart, | |
# so it appears that the situation will last at least that long. | |
# The Nunavut Intergovernmental Affairs hopes that they will "come to | |
# their senses", but the locals evidently don't see any problem with | |
# the current state of affairs. | |
# From Michaela Rodrigue, writing in the | |
# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> | |
# Nunatsiaq News (1999-11-19)</a>: | |
# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, | |
# central - or Nunavut time - for government offices, and eastern time | |
# for municipal offices and schools.... Igloolik [was similar but then] | |
# made the switch to central time on Saturday, Nov. 6. | |
# From Paul Eggert (2000-10-02): | |
# Matthews and Vincent (1998) say the following, but we lack histories | |
# for these potential new Zones. | |
# | |
# The Canadian Forces station at Alert uses Eastern Time while the | |
# handful of residents at the Eureka weather station [in the Central | |
# zone] skip daylight savings. Baffin Island, which is crossed by the | |
# Central, Eastern and Atlantic Time zones only uses Eastern Time. | |
# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of | |
# Central Time and Southampton Island [in the Central zone] is not | |
# required to use daylight savings. | |
# From | |
# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> | |
# Nunavut now has two time zones | |
# </a> (2000-11-10): | |
# The Nunavut government would allow its employees in Kugluktuk and | |
# Cambridge Bay to operate on central time year-round, putting them | |
# one hour behind the rest of Nunavut for six months during the winter. | |
# At the end of October the two communities had rebelled against | |
# Nunavut's unified time zone, refusing to shift to eastern time with | |
# the rest of the territory for the winter. Cambridge Bay remained on | |
# central time, while Kugluktuk, even farther west, reverted to | |
# mountain time, which they had used before the advent of Nunavut's | |
# unified time zone in 1999. | |
# | |
# From Rives McDow (2001-01-20), quoting the Nunavut government: | |
# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. | |
# From Paul Eggert (2000-12-04): | |
# Let's just keep track of the official times for now. | |
# From Rives McDow (2001-03-07): | |
# The premier of Nunavut has issued a ministerial statement advising | |
# that effective 2001-04-01, the territory of Nunavut will revert | |
# back to three time zones (mountain, central, and eastern). Of the | |
# cities in Nunavut, Coral Harbor is the only one that I know of that | |
# has said it will not observe dst, staying on EST year round. I'm | |
# checking for more info, and will get back to you if I come up with | |
# more. | |
# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] | |
# From Gwillim Law (2005-05-21): | |
# According to maps at | |
# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SWE.jpg | |
# http://inms-ienm.nrc-cnrc.gc.ca/images/time_services/TZ01SSE.jpg | |
# (both dated 2003), and | |
# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp | |
# (from a 1998 Canadian Geographic article), the de facto and de jure time | |
# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year | |
# round. Using Google, it's easy to find other websites that confirm this. | |
# I wasn't able to find how far back this time regimen goes, but since it | |
# predates the creation of Nunavut, it probably goes back many years.... | |
# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. | |
# | |
# From Paul Eggert (2005-07-26): | |
# For lack of better information, assume that Southampton Island observed | |
# daylight saving only during wartime. | |
# From Chris Walton (2007-03-01): | |
# ... the community of Resolute (located on Cornwallis Island in | |
# Nunavut) moved from Central Time to Eastern Time last November. | |
# Basically the community did not change its clocks at the end of | |
# daylight saving.... | |
# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html | |
# From Chris Walton (2011-03-21): | |
# Back in 2007 I initiated the creation of a new "zone file" for Resolute | |
# Bay. Resolute Bay is a small community located about 900km north of | |
# the Arctic Circle. The zone file was required because Resolute Bay had | |
# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. | |
# | |
# According to new information which I received last week, Resolute Bay | |
# went back to using UTC-6 in the winter of 2007-2008... | |
# | |
# On March 11/2007 most of Canada went onto daylight saving. On March | |
# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I | |
# talked to somebody that was both knowledgeable and helpful. I was able | |
# to confirm that Resolute Bay was still operating on UTC-5. It was | |
# explained to me that Resolute Bay had been on the Eastern Time zone | |
# (EST) in the winter, and was now back on the Central Time zone (CDT). | |
# i.e. the time zone had changed twice in the last year but the clocks | |
# had not moved. The residents had to know which time zone they were in | |
# so they could follow the correct TV schedule... | |
# | |
# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I | |
# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature | |
# of the phone call, I decided to seek out an alternate source of | |
# information. I found an e-mail address for somebody by the name of | |
# Stephanie Adams whose job was listed as "Inns North Support Officer for | |
# Arctic Co-operatives." I was under the impression that Stephanie lived | |
# and worked in Resolute Bay... | |
# | |
# On March 14/2011 I phoned the hamlet office again. I was told that | |
# Resolute Bay had been using Central Standard Time over the winter of | |
# 2010-2011 and that the clocks had therefore been moved one hour ahead | |
# on March 13/2011. The person I talked to was aware that Resolute Bay | |
# had previously experimented with Eastern Standard Time but he could not | |
# tell me when the practice had stopped. | |
# | |
# On March 17/2011 I searched the Web to find an e-mail address of | |
# somebody that might be able to tell me exactly when Resolute Bay went | |
# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz | |
# used to be the mayor of Resolute Bay and he apparently owns half the | |
# businesses including "South Camp Inn." This website has some info on | |
# Aziz: | |
# <a href="http://www.uphere.ca/node/493"> | |
# http://www.uphere.ca/node/493 | |
# </a> | |
# | |
# I sent Aziz an e-mail asking when Resolute Bay had stopped using | |
# Eastern Standard Time. | |
# | |
# Aziz responded quickly with this: "hi, The time was not changed for the | |
# 1 year only, the following year, the community went back to the old way | |
# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in | |
# the winter Zulu plus 6 hrs" | |
# | |
# This of course conflicted with everything I had ascertained in November 2008. | |
# | |
# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz | |
# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You | |
# may want to check with the weather office in Resolute Bay or do a | |
# search on the weather through Env. Canada. web site" | |
# | |
# If I had realized the Stephanie did not live in Resolute Bay I would | |
# never have contacted her. I now believe that all the information I | |
# obtained in November 2008 should be ignored... | |
# I apologize for reporting incorrect information in 2008. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule NT_YK 1918 only - Apr 14 2:00 1:00 D | |
Rule NT_YK 1918 only - Oct 27 2:00 0 S | |
Rule NT_YK 1919 only - May 25 2:00 1:00 D | |
Rule NT_YK 1919 only - Nov 1 0:00 0 S | |
Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War | |
Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace | |
Rule NT_YK 1945 only - Sep 30 2:00 0 S | |
Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD | |
Rule NT_YK 1965 only - Oct lastSun 2:00 0 S | |
Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D | |
Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S | |
Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
# aka Panniqtuuq | |
Zone America/Pangnirtung 0 - zzz 1921 # trading post est. | |
-4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 | |
-5:00 Canada E%sT 1999 Oct 31 2:00 | |
-6:00 Canada C%sT 2000 Oct 29 2:00 | |
-5:00 Canada E%sT | |
# formerly Frobisher Bay | |
Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. | |
-5:00 NT_YK E%sT 1999 Oct 31 2:00 | |
-6:00 Canada C%sT 2000 Oct 29 2:00 | |
-5:00 Canada E%sT | |
# aka Qausuittuq | |
Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded | |
-6:00 NT_YK C%sT 2000 Oct 29 2:00 | |
-5:00 - EST 2001 Apr 1 3:00 | |
-6:00 Canada C%sT 2006 Oct 29 2:00 | |
-5:00 - EST 2007 Mar 11 3:00 | |
-6:00 Canada C%sT | |
# aka Kangiqiniq | |
Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded | |
-6:00 NT_YK C%sT 2000 Oct 29 2:00 | |
-5:00 - EST 2001 Apr 1 3:00 | |
-6:00 Canada C%sT | |
# aka Iqaluktuuttiaq | |
Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? | |
-7:00 NT_YK M%sT 1999 Oct 31 2:00 | |
-6:00 Canada C%sT 2000 Oct 29 2:00 | |
-5:00 - EST 2000 Nov 5 0:00 | |
-6:00 - CST 2001 Apr 1 3:00 | |
-7:00 Canada M%sT | |
Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? | |
-7:00 NT_YK M%sT 1980 | |
-7:00 Canada M%sT | |
Zone America/Inuvik 0 - zzz 1953 # Inuvik founded | |
-8:00 NT_YK P%sT 1979 Apr lastSun 2:00 | |
-7:00 NT_YK M%sT 1980 | |
-7:00 Canada M%sT | |
Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 | |
-9:00 NT_YK Y%sT 1966 Jul 1 2:00 | |
-8:00 NT_YK P%sT 1980 | |
-8:00 Canada P%sT | |
Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 | |
-9:00 NT_YK Y%sT 1973 Oct 28 0:00 | |
-8:00 NT_YK P%sT 1980 | |
-8:00 Canada P%sT | |
############################################################################### | |
# Mexico | |
# From Paul Eggert (2001-03-05): | |
# The Investigation and Analysis Service of the | |
# Mexican Library of Congress (MLoC) has published a | |
# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> | |
# history of Mexican local time (in Spanish) | |
# </a>. | |
# | |
# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. | |
# (In all cases we go with the MLoC.) | |
# S&P report that Baja was at -8:00 in 1922/1923. | |
# S&P say the 1930 transition in Baja was 1930-11-16. | |
# S&P report no DST during summer 1931. | |
# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. | |
# From Gwillim Law (2001-02-20): | |
# There are some other discrepancies between the Decrees page and the | |
# tz database. I think they can best be explained by supposing that | |
# the researchers who prepared the Decrees page failed to find some of | |
# the relevant documents. | |
# From Alan Perry (1996-02-15): | |
# A guy from our Mexico subsidiary finally found the Presidential Decree | |
# outlining the timezone changes in Mexico. | |
# | |
# ------------- Begin Forwarded Message ------------- | |
# | |
# I finally got my hands on the Official Presidential Decree that sets up the | |
# rules for the DST changes. The rules are: | |
# | |
# 1. The country is divided in 3 timezones: | |
# - Baja California Norte (the Mexico/BajaNorte TZ) | |
# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) | |
# - The rest of the country (the Mexico/General TZ) | |
# | |
# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October | |
# at 2:00 AM, the times in each zone are as follows: | |
# BajaNorte: GMT+7 | |
# BajaSur: GMT+6 | |
# General: GMT+5 | |
# | |
# 3. The rest of the year, the times are as follows: | |
# BajaNorte: GMT+8 | |
# BajaSur: GMT+7 | |
# General: GMT+6 | |
# | |
# The Decree was published in Mexico's Official Newspaper on January 4th. | |
# | |
# -------------- End Forwarded Message -------------- | |
# From Paul Eggert (1996-06-12): | |
# For an English translation of the decree, see | |
# <a href="http://mexico-travel.com/extra/timezone_eng.html"> | |
# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). | |
# </a> | |
# From Rives McDow (1998-10-08): | |
# The State of Quintana Roo has reverted back to central STD and DST times | |
# (i.e. UTC -0600 and -0500 as of 1998-08-02). | |
# From Rives McDow (2000-01-10): | |
# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time | |
# zone 5 hours from the International Date Line, and will not observe daylight | |
# savings time so as to stay on the same time zone as the southern part of | |
# Arizona year round. | |
# From Jesper Norgaard, translating | |
# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): | |
# In Oaxaca, the 55.000 teachers from the Section 22 of the National | |
# Syndicate of Education Workers, refuse to apply daylight saving each | |
# year, so that the more than 10,000 schools work at normal hour the | |
# whole year. | |
# From Gwillim Law (2001-01-19): | |
# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says | |
# (translated):... | |
# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced | |
# that Summer Time will be reduced from seven to five months, starting | |
# this year.... | |
# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> | |
# [translated], says "summer time will ... take effect on the first Sunday | |
# in May, and end on the last Sunday of September. | |
# From Arthur David Olson (2001-01-25): | |
# The 2001-01-24 traditional Washington Post contained the page one | |
# story "Timely Issue Divides Mexicans."... | |
# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html | |
# ... Mexico City Mayor Lopez Obrador "...is threatening to keep | |
# Mexico City and its 20 million residents on a different time than | |
# the rest of the country..." In particular, Lopez Obrador would abolish | |
# observation of Daylight Saving Time. | |
# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> | |
# Official statute published by the Energy Department | |
# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, | |
# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). | |
# From Paul Eggert (2001-03-03): | |
# | |
# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> | |
# James F. Smith writes in today's LA Times | |
# </a> | |
# * Sonora will continue to observe standard time. | |
# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that | |
# the Federal District will not adopt DST. | |
# * 4 of 16 district leaders announced they'll ignore the decree. | |
# * The decree does not affect federal-controlled facilities including | |
# the airport, banks, hospitals, and schools. | |
# | |
# For now we'll assume that the Federal District will bow to federal rules. | |
# From Jesper Norgaard (2001-04-01): | |
# I found some references to the Mexican application of daylight | |
# saving, which modifies what I had already sent you, stating earlier | |
# that a number of northern Mexican states would go on daylight | |
# saving. The modification reverts this to only cover Baja California | |
# (Norte), while all other states (except Sonora, who has no daylight | |
# saving all year) will follow the original decree of president | |
# Vicente Fox, starting daylight saving May 6, 2001 and ending | |
# September 30, 2001. | |
# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> | |
# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) | |
# From Reuters (2001-09-04): | |
# Mexico's Supreme Court on Tuesday declared that daylight savings was | |
# unconstitutional in Mexico City, creating the possibility the | |
# capital will be in a different time zone from the rest of the nation | |
# next year.... The Supreme Court's ruling takes effect at 2:00 | |
# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to | |
# standard time. "This is so residents of the Federal District are not | |
# subject to unexpected time changes," a statement from the court said. | |
# From Jesper Norgaard Welen (2002-03-12): | |
# ... consulting my local grocery store(!) and my coworkers, they all insisted | |
# that a new decision had been made to reinstate US style DST in Mexico.... | |
# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) | |
# confirms this. Sonora as usual is the only state where DST is not applied. | |
# From Steffen Thorsen (2009-12-28): | |
# | |
# Steffen Thorsen wrote: | |
# > Mexico's House of Representatives has approved a proposal for northern | |
# > Mexico's border cities to share the same daylight saving schedule as | |
# > the United States. | |
# Now this has passed both the Congress and the Senate, so starting from | |
# 2010, some border regions will be the same: | |
# <a href="http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/"> | |
# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ | |
# </a> | |
# <a href="http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939"> | |
# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 | |
# </a> | |
# (Spanish) | |
# | |
# Could not find the new law text, but the proposed law text changes are here: | |
# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf"> | |
# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf | |
# </a> | |
# (Gaceta Parlamentaria) | |
# | |
# There is also a list of the votes here: | |
# <a href="http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html"> | |
# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html | |
# </a> | |
# | |
# Our page: | |
# <a href="http://www.timeanddate.com/news/time/north-mexico-dst-change.html"> | |
# http://www.timeanddate.com/news/time/north-mexico-dst-change.html | |
# </a> | |
# From Arthur David Olson (2010-01-20): | |
# The page | |
# <a href="http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010"> | |
# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 | |
# </a> | |
# includes this text: | |
# En los municipios fronterizos de Tijuana y Mexicali en Baja California; | |
# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; | |
# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en | |
# Tamaulipas, la aplicación de este horario estacional surtirá efecto | |
# desde las dos horas del segundo domingo de marzo y concluirá a las dos | |
# horas del primer domingo de noviembre. | |
# En los municipios fronterizos que se encuentren ubicados en la franja | |
# fronteriza norte en el territorio comprendido entre la línea | |
# internacional y la línea paralela ubicada a una distancia de veinte | |
# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el | |
# interior del país, la aplicación de este horario estacional surtirá | |
# efecto desde las dos horas del segundo domingo de marzo y concluirá a | |
# las dos horas del primer domingo de noviembre. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Mexico 1939 only - Feb 5 0:00 1:00 D | |
Rule Mexico 1939 only - Jun 25 0:00 0 S | |
Rule Mexico 1940 only - Dec 9 0:00 1:00 D | |
Rule Mexico 1941 only - Apr 1 0:00 0 S | |
Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War | |
Rule Mexico 1944 only - May 1 0:00 0 S | |
Rule Mexico 1950 only - Feb 12 0:00 1:00 D | |
Rule Mexico 1950 only - Jul 30 0:00 0 S | |
Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D | |
Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S | |
Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D | |
Rule Mexico 2001 only - Sep lastSun 2:00 0 S | |
Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D | |
Rule Mexico 2002 max - Oct lastSun 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
# Quintana Roo | |
Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 | |
-6:00 - CST 1981 Dec 23 | |
-5:00 Mexico E%sT 1998 Aug 2 2:00 | |
-6:00 Mexico C%sT | |
# Campeche, Yucatan | |
Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 | |
-6:00 - CST 1981 Dec 23 | |
-5:00 - EST 1982 Dec 2 | |
-6:00 Mexico C%sT | |
# Coahuila, Durango, Nuevo Leon, Tamaulipas (near US border) | |
Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 | |
-6:00 - CST 1988 | |
-6:00 US C%sT 1989 | |
-6:00 Mexico C%sT 2010 | |
-6:00 US C%sT | |
# Coahuila, Durango, Nuevo Leon, Tamaulipas (away from US border) | |
Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 | |
-6:00 - CST 1988 | |
-6:00 US C%sT 1989 | |
-6:00 Mexico C%sT | |
# Central Mexico | |
Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 | |
-7:00 - MST 1927 Jun 10 23:00 | |
-6:00 - CST 1930 Nov 15 | |
-7:00 - MST 1931 May 1 23:00 | |
-6:00 - CST 1931 Oct | |
-7:00 - MST 1932 Apr 1 | |
-6:00 Mexico C%sT 2001 Sep 30 02:00 | |
-6:00 - CST 2002 Feb 20 | |
-6:00 Mexico C%sT | |
# Chihuahua (near US border) | |
Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 | |
-7:00 - MST 1927 Jun 10 23:00 | |
-6:00 - CST 1930 Nov 15 | |
-7:00 - MST 1931 May 1 23:00 | |
-6:00 - CST 1931 Oct | |
-7:00 - MST 1932 Apr 1 | |
-6:00 - CST 1996 | |
-6:00 Mexico C%sT 1998 | |
-6:00 - CST 1998 Apr Sun>=1 3:00 | |
-7:00 Mexico M%sT 2010 | |
-7:00 US M%sT | |
# Chihuahua (away from US border) | |
Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 | |
-7:00 - MST 1927 Jun 10 23:00 | |
-6:00 - CST 1930 Nov 15 | |
-7:00 - MST 1931 May 1 23:00 | |
-6:00 - CST 1931 Oct | |
-7:00 - MST 1932 Apr 1 | |
-6:00 - CST 1996 | |
-6:00 Mexico C%sT 1998 | |
-6:00 - CST 1998 Apr Sun>=1 3:00 | |
-7:00 Mexico M%sT | |
# Sonora | |
Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 | |
-7:00 - MST 1927 Jun 10 23:00 | |
-6:00 - CST 1930 Nov 15 | |
-7:00 - MST 1931 May 1 23:00 | |
-6:00 - CST 1931 Oct | |
-7:00 - MST 1932 Apr 1 | |
-6:00 - CST 1942 Apr 24 | |
-7:00 - MST 1949 Jan 14 | |
-8:00 - PST 1970 | |
-7:00 Mexico M%sT 1999 | |
-7:00 - MST | |
# From Alexander Krivenyshev (2010-04-21): | |
# According to news, Bahía de Banderas (Mexican state of Nayarit) | |
# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to | |
# share the same time zone as nearby city Puerto Vallarta, Jalisco). | |
# | |
# (Spanish) | |
# Bahía de Banderas homologa su horario al del centro del | |
# país, a partir de este domingo | |
# <a href="http://www.nayarit.gob.mx/notes.asp?id=20748"> | |
# http://www.nayarit.gob.mx/notes.asp?id=20748 | |
# </a> | |
# | |
# Bahía de Banderas homologa su horario con el del Centro del | |
# País | |
# <a href="http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50"> | |
# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50" | |
# </a> | |
# | |
# (English) | |
# Puerto Vallarta and Bahía de Banderas: One Time Zone | |
# <a href="http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml"> | |
# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml | |
# </a> | |
# | |
# or | |
# <a href="http://www.worldtimezone.com/dst_news/dst_news_mexico08.html"> | |
# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html | |
# </a> | |
# | |
# "Mexico's Senate approved the amendments to the Mexican Schedule System that | |
# will allow Bahía de Banderas and Puerto Vallarta to share the same time | |
# zone ..." | |
# Baja California Sur, Nayarit, Sinaloa | |
# From Arthur David Olson (2010-05-01): | |
# Use "Bahia_Banderas" to keep the name to fourteen characters. | |
Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 | |
-7:00 - MST 1927 Jun 10 23:00 | |
-6:00 - CST 1930 Nov 15 | |
-7:00 - MST 1931 May 1 23:00 | |
-6:00 - CST 1931 Oct | |
-7:00 - MST 1932 Apr 1 | |
-6:00 - CST 1942 Apr 24 | |
-7:00 - MST 1949 Jan 14 | |
-8:00 - PST 1970 | |
-7:00 Mexico M%sT | |
Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 | |
-7:00 - MST 1927 Jun 10 23:00 | |
-6:00 - CST 1930 Nov 15 | |
-7:00 - MST 1931 May 1 23:00 | |
-6:00 - CST 1931 Oct | |
-7:00 - MST 1932 Apr 1 | |
-6:00 - CST 1942 Apr 24 | |
-7:00 - MST 1949 Jan 14 | |
-8:00 - PST 1970 | |
-7:00 Mexico M%sT 2010 Apr 4 2:00 | |
-6:00 Mexico C%sT | |
# Baja California (near US border) | |
Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 | |
-7:00 - MST 1924 | |
-8:00 - PST 1927 Jun 10 23:00 | |
-7:00 - MST 1930 Nov 15 | |
-8:00 - PST 1931 Apr 1 | |
-8:00 1:00 PDT 1931 Sep 30 | |
-8:00 - PST 1942 Apr 24 | |
-8:00 1:00 PWT 1945 Aug 14 23:00u | |
-8:00 1:00 PPT 1945 Nov 12 # Peace | |
-8:00 - PST 1948 Apr 5 | |
-8:00 1:00 PDT 1949 Jan 14 | |
-8:00 - PST 1954 | |
-8:00 CA P%sT 1961 | |
-8:00 - PST 1976 | |
-8:00 US P%sT 1996 | |
-8:00 Mexico P%sT 2001 | |
-8:00 US P%sT 2002 Feb 20 | |
-8:00 Mexico P%sT 2010 | |
-8:00 US P%sT | |
# Baja California (away from US border) | |
Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 | |
-7:00 - MST 1924 | |
-8:00 - PST 1927 Jun 10 23:00 | |
-7:00 - MST 1930 Nov 15 | |
-8:00 - PST 1931 Apr 1 | |
-8:00 1:00 PDT 1931 Sep 30 | |
-8:00 - PST 1942 Apr 24 | |
-8:00 1:00 PWT 1945 Aug 14 23:00u | |
-8:00 1:00 PPT 1945 Nov 12 # Peace | |
-8:00 - PST 1948 Apr 5 | |
-8:00 1:00 PDT 1949 Jan 14 | |
-8:00 - PST 1954 | |
-8:00 CA P%sT 1961 | |
-8:00 - PST 1976 | |
-8:00 US P%sT 1996 | |
-8:00 Mexico P%sT 2001 | |
-8:00 US P%sT 2002 Feb 20 | |
-8:00 Mexico P%sT | |
# From Paul Eggert (2006-03-22): | |
# Formerly there was an America/Ensenada zone, which differed from | |
# America/Tijuana only in that it did not observe DST from 1976 | |
# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say | |
# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports | |
# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and | |
# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that | |
# DST-observance was a town-by-town matter back then. This concerns | |
# data after 1970 so most likely there should be at least one Zone | |
# other than America/Tijuana for Baja, but it's not clear yet what its | |
# name or contents should be. | |
# | |
# Revillagigedo Is | |
# no information | |
############################################################################### | |
# Anguilla | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Anguilla -4:12:16 - LMT 1912 Mar 2 | |
-4:00 - AST | |
# Antigua and Barbuda | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Antigua -4:07:12 - LMT 1912 Mar 2 | |
-5:00 - EST 1951 | |
-4:00 - AST | |
# Bahamas | |
# | |
# From Sue Williams (2006-12-07): | |
# The Bahamas announced about a month ago that they plan to change their DST | |
# rules to sync with the U.S. starting in 2007.... | |
# http://www.jonesbahamas.com/?c=45&a=10412 | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S | |
Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Nassau -5:09:24 - LMT 1912 Mar 2 | |
-5:00 Bahamas E%sT 1976 | |
-5:00 US E%sT | |
# Barbados | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Barb 1977 only - Jun 12 2:00 1:00 D | |
Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S | |
Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D | |
Rule Barb 1979 only - Sep 30 2:00 0 S | |
Rule Barb 1980 only - Sep 25 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Barbados -3:58:28 - LMT 1924 # Bridgetown | |
-3:58:28 - BMT 1932 # Bridgetown Mean Time | |
-4:00 Barb A%sT | |
# Belize | |
# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD | |
Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S | |
Rule Belize 1973 only - Dec 5 0:00 1:00 D | |
Rule Belize 1974 only - Feb 9 0:00 0 S | |
Rule Belize 1982 only - Dec 18 0:00 1:00 D | |
Rule Belize 1983 only - Feb 12 0:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Belize -5:52:48 - LMT 1912 Apr | |
-6:00 Belize C%sT | |
# Bermuda | |
# From Dan Jones, reporting in The Royal Gazette (2006-06-26): | |
# Next year, however, clocks in the US will go forward on the second Sunday | |
# in March, until the first Sunday in November. And, after the Time Zone | |
# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on | |
# Friday, the same thing will happen in Bermuda. | |
# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton | |
-4:00 - AST 1974 Apr 28 2:00 | |
-4:00 Bahamas A%sT 1976 | |
-4:00 US A%sT | |
# Cayman Is | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown | |
-5:07:12 - KMT 1912 Feb # Kingston Mean Time | |
-5:00 - EST | |
# Costa Rica | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D | |
Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S | |
Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D | |
# IATA SSIM (1991-09) says the following was at 1:00; | |
# go with Shanks & Pottenger. | |
Rule CR 1991 only - Jul 1 0:00 0 S | |
Rule CR 1992 only - Mar 15 0:00 0 S | |
# There are too many San Joses elsewhere, so we'll use `Costa Rica'. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose | |
-5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time | |
-6:00 CR C%sT | |
# Coco | |
# no information; probably like America/Costa_Rica | |
# Cuba | |
# From Arthur David Olson (1999-03-29): | |
# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between | |
# the Cuban National Team and the Baltimore Orioles was carried live on | |
# the Orioles Radio Network, including affiliate WTOP in Washington, DC. | |
# During the game, play-by-play announcer Jim Hunter noted that | |
# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving | |
# Time today." (The "two hour" remark referred to losing one hour of | |
# sleep on 1999-03-28--when the announcers were in Cuba as it switched | |
# to DST--and one more hour on 1999-04-04--when the announcers will have | |
# returned to Baltimore, which switches on that date.) | |
# From Evert van der Veer via Steffen Thorsen (2004-10-28): | |
# Cuba is not going back to standard time this year. | |
# From Paul Eggert (2006-03-22): | |
# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html | |
# says that it's due to a problem at the Antonio Guiteras | |
# thermoelectric plant, and says "This October there will be no return | |
# to normal hours (after daylight saving time)". | |
# For now, let's assume that it's a temporary measure. | |
# From Carlos A. Carnero Delgado (2005-11-12): | |
# This year (just like in 2004-2005) there's no change in time zone | |
# adjustment in Cuba. We will stay in daylight saving time: | |
# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html | |
# From Jesper Norgaard Welen (2006-10-21): | |
# An article in GRANMA INTERNACIONAL claims that Cuba will end | |
# the 3 years of permanent DST next weekend, see | |
# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html | |
# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, | |
# watches should be set back one hour -- going back to 00:00 hours -- returning | |
# to the normal schedule.... | |
# From Paul Eggert (2007-03-02): | |
# http://www.granma.cubaweb.cu/english/news/art89.html, dated yesterday, | |
# says Cuban clocks will advance at midnight on March 10. | |
# For lack of better information, assume Cuba will use US rules, | |
# except that it switches at midnight standard time as usual. | |
# | |
# From Steffen Thorsen (2007-10-25): | |
# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week | |
# earlier - on the last Sunday of October, just like in 2006. | |
# | |
# He supplied these references: | |
# | |
# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES | |
# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm | |
# | |
# From Alex Kryvenishev (2007-10-25): | |
# Here is also article from Granma (Cuba): | |
# | |
# [Regira] el Horario Normal desde el [proximo] domingo 28 de octubre | |
# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html | |
# | |
# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html | |
# From Arthur David Olson (2008-03-09): | |
# I'm in Maryland which is now observing United States Eastern Daylight | |
# Time. At 9:44 local time I used RealPlayer to listen to | |
# <a href="http://media.enet.cu/radioreloj"> | |
# http://media.enet.cu/radioreloj | |
# </a>, a Cuban information station, and heard | |
# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), | |
# indicating that Cuba is still on standard time. | |
# From Steffen Thorsen (2008-03-12): | |
# It seems that Cuba will start DST on Sunday, 2007-03-16... | |
# It was announced yesterday, according to this source (in Spanish): | |
# <a href="http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm"> | |
# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm | |
# </a> | |
# | |
# Some more background information is posted here: | |
# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html"> | |
# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html | |
# </a> | |
# | |
# The article also says that Cuba has been observing DST since 1963, | |
# while Shanks (and tzdata) has 1965 as the first date (except in the | |
# 1940's). Many other web pages in Cuba also claim that it has been | |
# observed since 1963, but with the exception of 1970 - an exception | |
# which is not present in tzdata/Shanks. So there is a chance we need to | |
# change some historic records as well. | |
# | |
# One example: | |
# <a href="http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm"> | |
# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm | |
# </a> | |
# From Jesper Norgaard Welen (2008-03-13): | |
# The Cuban time change has just been confirmed on the most authoritative | |
# web site, the Granma. Please check out | |
# <a href="http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html"> | |
# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html | |
# </a> | |
# | |
# Basically as expected after Steffen Thorsens information, the change | |
# will take place midnight between Saturday and Sunday. | |
# From Arthur David Olson (2008-03-12): | |
# Assume Sun>=15 (third Sunday) going forward. | |
# From Alexander Krivenyshev (2009-03-04) | |
# According to the Radio Reloj - Cuba will start Daylight Saving Time on | |
# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- | |
# not on midnight March 14 / March 15 as previously thought. | |
# | |
# <a href="http://www.worldtimezone.com/dst_news/dst_news_cuba05.html"> | |
# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html | |
# (in Spanish) | |
# </a> | |
# From Arthur David Olson (2009-03-09) | |
# I listened over the Internet to | |
# <a href="http://media.enet.cu/readioreloj"> | |
# http://media.enet.cu/readioreloj | |
# </a> | |
# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the | |
# the time was announced as "diez cinco"--the same time as here, indicating | |
# that has indeed switched to DST. Assume second Sunday from 2009 forward. | |
# From Steffen Thorsen (2011-03-08): | |
# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 | |
# this year. Nothing about the end date known so far (if that has | |
# changed at all). | |
# | |
# Source: | |
# <a href="http://granma.co.cu/2011/03/08/nacional/artic01.html"> | |
# http://granma.co.cu/2011/03/08/nacional/artic01.html | |
# </a> | |
# | |
# Our info: | |
# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html"> | |
# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html | |
# </a> | |
# | |
# From Steffen Thorsen (2011-10-30) | |
# Cuba will end DST two weeks later this year. Instead of going back | |
# tonight, it has been delayed to 2011-11-13 at 01:00. | |
# | |
# One source (Spanish) | |
# <a href="http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html"> | |
# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html | |
# </a> | |
# | |
# Our page: | |
# <a href="http://www.timeanddate.com/news/time/cuba-time-changes-2011.html"> | |
# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html | |
# </a> | |
# | |
# From Steffen Thorsen (2012-03-01) | |
# According to Radio Reloj, Cuba will start DST on Midnight between March | |
# 31 and April 1. | |
# | |
# Radio Reloj has the following info (Spanish): | |
# <a href="http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril"> | |
# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril | |
# </a> | |
# | |
# Our info on it: | |
# <a href="http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html"> | |
# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html | |
# </a> | |
# From Steffen Thorsen (2012-11-03): | |
# Radio Reloj and many other sources report that Cuba is changing back | |
# to standard time on 2012-11-04: | |
# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre | |
# From Paul Eggert (2012-11-03): | |
# For now, assume the future rule is first Sunday in November. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Cuba 1928 only - Jun 10 0:00 1:00 D | |
Rule Cuba 1928 only - Oct 10 0:00 0 S | |
Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D | |
Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S | |
Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D | |
Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S | |
Rule Cuba 1965 only - Jun 1 0:00 1:00 D | |
Rule Cuba 1965 only - Sep 30 0:00 0 S | |
Rule Cuba 1966 only - May 29 0:00 1:00 D | |
Rule Cuba 1966 only - Oct 2 0:00 0 S | |
Rule Cuba 1967 only - Apr 8 0:00 1:00 D | |
Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S | |
Rule Cuba 1968 only - Apr 14 0:00 1:00 D | |
Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D | |
Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S | |
Rule Cuba 1972 1974 - Oct 8 0:00 0 S | |
Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S | |
Rule Cuba 1978 only - May 7 0:00 1:00 D | |
Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S | |
Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D | |
Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D | |
Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D | |
Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D | |
Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S | |
Rule Cuba 1996 only - Oct 6 0:00s 0 S | |
Rule Cuba 1997 only - Oct 12 0:00s 0 S | |
Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D | |
Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S | |
Rule Cuba 2000 2004 - Apr Sun>=1 0:00s 1:00 D | |
Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S | |
Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D | |
Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D | |
Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D | |
Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D | |
Rule Cuba 2011 only - Nov 13 0:00s 0 S | |
Rule Cuba 2012 only - Apr 1 0:00s 1:00 D | |
Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S | |
Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Havana -5:29:28 - LMT 1890 | |
-5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT | |
-5:00 Cuba C%sT | |
# Dominica | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau | |
-4:00 - AST | |
# Dominican Republic | |
# From Steffen Thorsen (2000-10-30): | |
# Enrique Morales reported to me that the Dominican Republic has changed the | |
# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... | |
# http://www.listin.com.do/antes/261000/republica/princi.html | |
# From Paul Eggert (2000-12-04): | |
# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. | |
# From Rives McDow (2000-12-01): | |
# Dominican Republic changed its mind and presidential decree on Tuesday, | |
# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the | |
# Dominican Republic will be reverting to 8 hours from the International Date | |
# Line, and will not be using DST in the foreseeable future. The reason they | |
# decided to use DST was to be in synch with Puerto Rico, who was also going | |
# to implement DST. When Puerto Rico didn't implement DST, the president | |
# decided to revert. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule DR 1966 only - Oct 30 0:00 1:00 D | |
Rule DR 1967 only - Feb 28 0:00 0 S | |
Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD | |
Rule DR 1970 only - Feb 21 0:00 0 S | |
Rule DR 1971 only - Jan 20 0:00 0 S | |
Rule DR 1972 1974 - Jan 21 0:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Santo_Domingo -4:39:36 - LMT 1890 | |
-4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT | |
-5:00 DR E%sT 1974 Oct 27 | |
-4:00 - AST 2000 Oct 29 02:00 | |
-5:00 US E%sT 2000 Dec 3 01:00 | |
-4:00 - AST | |
# El Salvador | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D | |
Rule Salv 1987 1988 - Sep lastSun 0:00 0 S | |
# There are too many San Salvadors elsewhere, so use America/El_Salvador | |
# instead of America/San_Salvador. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador | |
-6:00 Salv C%sT | |
# Grenada | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Grenada -4:07:00 - LMT 1911 Jul # St George's | |
-4:00 - AST | |
# Guadeloupe | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre | |
-4:00 - AST | |
# St Barthelemy | |
Link America/Guadeloupe America/St_Barthelemy | |
# St Martin (French part) | |
Link America/Guadeloupe America/Marigot | |
# Guatemala | |
# | |
# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: | |
# Diario Co Latino, at | |
# http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079, | |
# says in an article dated 2006-04-19 that the Guatemalan government had | |
# decided on that date to advance official time by 60 minutes, to lessen the | |
# impact of the elevated cost of oil.... Daylight saving time will last from | |
# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). | |
# From Paul Eggert (2006-06-22): | |
# The Ministry of Energy and Mines, press release CP-15/2006 | |
# (2006-04-19), says DST ends at 24:00. See | |
# <http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf>. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Guat 1973 only - Nov 25 0:00 1:00 D | |
Rule Guat 1974 only - Feb 24 0:00 0 S | |
Rule Guat 1983 only - May 21 0:00 1:00 D | |
Rule Guat 1983 only - Sep 22 0:00 0 S | |
Rule Guat 1991 only - Mar 23 0:00 1:00 D | |
Rule Guat 1991 only - Sep 7 0:00 0 S | |
Rule Guat 2006 only - Apr 30 0:00 1:00 D | |
Rule Guat 2006 only - Oct 1 0:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 | |
-6:00 Guat C%sT | |
# Haiti | |
# From Gwillim Law (2005-04-15): | |
# Risto O. Nykanen wrote me that Haiti is now on DST. | |
# I searched for confirmation, and I found a | |
# <a href="http://www.haitianconsulate.org/time.doc"> press release | |
# on the Web page of the Haitian Consulate in Chicago (2005-03-31), | |
# </a>. Translated from French, it says: | |
# | |
# "The Prime Minister's Communication Office notifies the public in general | |
# and the press in particular that, following a decision of the Interior | |
# Ministry and the Territorial Collectivities [I suppose that means the | |
# provinces], Haiti will move to Eastern Daylight Time in the night from next | |
# Saturday the 2nd to Sunday the 3rd. | |
# | |
# "Consequently, the Prime Minister's Communication Office wishes to inform | |
# the population that the country's clocks will be set forward one hour | |
# starting at midnight. This provision will hold until the last Saturday in | |
# October 2005. | |
# | |
# "Port-au-Prince, March 31, 2005" | |
# | |
# From Steffen Thorsen (2006-04-04): | |
# I have been informed by users that Haiti observes DST this year like | |
# last year, so the current "only" rule for 2005 might be changed to a | |
# "max" rule or to last until 2006. (Who knows if they will observe DST | |
# next year or if they will extend their DST like US/Canada next year). | |
# | |
# I have found this article about it (in French): | |
# http://www.haitipressnetwork.com/news.cfm?articleID=7612 | |
# | |
# The reason seems to be an energy crisis. | |
# From Stephen Colebourne (2007-02-22): | |
# Some IATA info: Haiti won't be having DST in 2007. | |
# From Steffen Thorsen (2012-03-11): | |
# According to several news sources, Haiti will observe DST this year, | |
# apparently using the same start and end date as USA/Canada. | |
# So this means they have already changed their time. | |
# | |
# (Sources in French): | |
# <a href="http://www.alterpresse.org/spip.php?article12510"> | |
# http://www.alterpresse.org/spip.php?article12510 | |
# </a> | |
# <a href="http://radiovision2000haiti.net/home/?p=13253"> | |
# http://radiovision2000haiti.net/home/?p=13253 | |
# </a> | |
# | |
# Our coverage: | |
# <a href="http://www.timeanddate.com/news/time/haiti-dst-2012.html"> | |
# http://www.timeanddate.com/news/time/haiti-dst-2012.html | |
# </a> | |
# From Arthur David Olson (2012-03-11): | |
# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to | |
# 3:00 a.m. rather than the traditional Haitian jump at midnight. | |
# Assume a US-style fall back as well XXX. | |
# Do not yet assume that the change carries forward past 2012 XXX. | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Haiti 1983 only - May 8 0:00 1:00 D | |
Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D | |
Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S | |
# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. | |
# Go with IATA. | |
Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D | |
Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S | |
Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D | |
Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S | |
Rule Haiti 2012 only - Mar Sun>=8 2:00 1:00 D | |
Rule Haiti 2012 only - Nov Sun>=1 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Port-au-Prince -4:49:20 - LMT 1890 | |
-4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT | |
-5:00 Haiti E%sT | |
# Honduras | |
# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. | |
# From Paul Eggert (2006-05-05): | |
# worldtimezone.com reports a 2006-05-02 Spanish-language AP article | |
# saying Honduras will start using DST midnight Saturday, effective 4 | |
# months until September. La Tribuna reported today | |
# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president | |
# of Honduras, refused to back down on this. | |
# From Jesper Norgaard Welen (2006-08-08): | |
# It seems that Honduras has returned from DST to standard time this Monday at | |
# 00:00 hours (prolonging Sunday to 25 hours duration). | |
# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html | |
# From Paul Eggert (2006-08-08): | |
# Also see Diario El Heraldo, The country returns to standard time (2006-08-08) | |
# <http://www.elheraldo.hn/nota.php?nid=54941&sec=12>. | |
# It mentions executive decree 18-2006. | |
# From Steffen Thorsen (2006-08-17): | |
# Honduras will observe DST from 2007 to 2009, exact dates are not | |
# published, I have located this authoritative source: | |
# http://www.presidencia.gob.hn/noticia.aspx?nId=47 | |
# From Steffen Thorsen (2007-03-30): | |
# http://www.laprensahn.com/pais_nota.php?id04962=7386 | |
# So it seems that Honduras will not enter DST this year.... | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D | |
Rule Hond 1987 1988 - Sep lastSun 0:00 0 S | |
Rule Hond 2006 only - May Sun>=1 0:00 1:00 D | |
Rule Hond 2006 only - Aug Mon>=1 0:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr | |
-6:00 Hond C%sT | |
# | |
# Great Swan I ceded by US to Honduras in 1972 | |
# Jamaica | |
# From Bob Devine (1988-01-28): | |
# Follows US rules. | |
# From U. S. Naval Observatory (1989-01-19): | |
# JAMAICA 5 H BEHIND UTC | |
# From Shanks & Pottenger: | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston | |
-5:07:12 - KMT 1912 Feb # Kingston Mean Time | |
-5:00 - EST 1974 Apr 28 2:00 | |
-5:00 US E%sT 1984 | |
-5:00 - EST | |
# Martinique | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France | |
-4:04:20 - FFMT 1911 May # Fort-de-France MT | |
-4:00 - AST 1980 Apr 6 | |
-4:00 1:00 ADT 1980 Sep 28 | |
-4:00 - AST | |
# Montserrat | |
# From Paul Eggert (2006-03-22): | |
# In 1995 volcanic eruptions forced evacuation of Plymouth, the capital. | |
# world.gazetteer.com says Cork Hill is the most populous location now. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Cork Hill | |
-4:00 - AST | |
# Nicaragua | |
# | |
# This uses Shanks & Pottenger for times before 2005. | |
# | |
# From Steffen Thorsen (2005-04-12): | |
# I've got reports from 8 different people that Nicaragua just started | |
# DST on Sunday 2005-04-10, in order to save energy because of | |
# expensive petroleum. The exact end date for DST is not yet | |
# announced, only "September" but some sites also say "mid-September". | |
# Some background information is available on the President's official site: | |
# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm | |
# The Decree, no 23-2005 is available here: | |
# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf | |
# | |
# From Paul Eggert (2005-05-01): | |
# The decree doesn't say anything about daylight saving, but for now let's | |
# assume that it is daylight saving.... | |
# | |
# From Gwillim Law (2005-04-21): | |
# The Associated Press story on the time change, which can be found at | |
# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html | |
# and elsewhere, says (fifth paragraph, translated from Spanish): "The last | |
# time that a change of clocks was applied to save energy was in the year 2000 | |
# during the Arnoldo Aleman administration."... | |
# The northamerica file says that Nicaragua has been on UTC-6 continuously | |
# since December 1998. I wasn't able to find any details of Nicaraguan time | |
# changes in 2000. Perhaps a note could be added to the northamerica file, to | |
# the effect that we have indirect evidence that DST was observed in 2000. | |
# | |
# From Jesper Norgaard Welen (2005-11-02): | |
# Nicaragua left DST the 2005-10-02 at 00:00 (local time). | |
# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm | |
# (2005-09-26) | |
# | |
# From Jesper Norgaard Welen (2006-05-05): | |
# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 | |
# (my informal translation) | |
# By order of the president of the republic, Enrique Bolanos, Nicaragua | |
# advanced by sixty minutes their official time, yesterday at 2 in the | |
# morning, and will stay that way until 30.th. of september. | |
# | |
# From Jesper Norgaard Welen (2006-09-30): | |
# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf | |
# My informal translation runs: | |
# The natural sun time is restored in all the national territory, in that the | |
# time is returned one hour at 01:00 am of October 1 of 2006. | |
# | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D | |
Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S | |
Rule Nic 2005 only - Apr 10 0:00 1:00 D | |
Rule Nic 2005 only - Oct Sun>=1 0:00 0 S | |
Rule Nic 2006 only - Apr 30 2:00 1:00 D | |
Rule Nic 2006 only - Oct Sun>=1 1:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Managua -5:45:08 - LMT 1890 | |
-5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? | |
-6:00 - CST 1973 May | |
-5:00 - EST 1975 Feb 16 | |
-6:00 Nic C%sT 1992 Jan 1 4:00 | |
-5:00 - EST 1992 Sep 24 | |
-6:00 - CST 1993 | |
-5:00 - EST 1997 | |
-6:00 Nic C%sT | |
# Panama | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Panama -5:18:08 - LMT 1890 | |
-5:19:36 - CMT 1908 Apr 22 # Colon Mean Time | |
-5:00 - EST | |
# Puerto Rico | |
# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan | |
-4:00 - AST 1942 May 3 | |
-4:00 US A%sT 1946 | |
-4:00 - AST | |
# St Kitts-Nevis | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre | |
-4:00 - AST | |
# St Lucia | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries | |
-4:04:00 - CMT 1912 # Castries Mean Time | |
-4:00 - AST | |
# St Pierre and Miquelon | |
# There are too many St Pierres elsewhere, so we'll use `Miquelon'. | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre | |
-4:00 - AST 1980 May | |
-3:00 - PMST 1987 # Pierre & Miquelon Time | |
-3:00 Canada PM%sT | |
# St Vincent and the Grenadines | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown | |
-4:04:56 - KMT 1912 # Kingstown Mean Time | |
-4:00 - AST | |
# Turks and Caicos | |
# | |
# From Chris Dunn in | |
# <http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007> | |
# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the | |
# daylight saving dates for time changes have been adjusted to match | |
# the recent U.S. change of dates. | |
# | |
# From Brian Inglis (2007-04-28): | |
# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] | |
# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three | |
# rows before that there is an out of date entry for Oct: | |
# "Eastern Standard Times Begins 2007 | |
# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" | |
# indicating that the normal ET rules are followed. | |
# | |
# From Paul Eggert (2006-05-01): | |
# Shanks & Pottenger say they use US DST rules, but IATA SSIM (1991/1998) | |
# says they switch at midnight. Go with Shanks & Pottenger. | |
# | |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S | |
Rule TC 1979 1986 - Apr lastSun 2:00 1:00 D | |
Rule TC 1979 2006 - Oct lastSun 2:00 0 S | |
Rule TC 1987 2006 - Apr Sun>=1 2:00 1:00 D | |
Rule TC 2007 max - Mar Sun>=8 2:00 1:00 D | |
Rule TC 2007 max - Nov Sun>=1 2:00 0 S | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Grand_Turk -4:44:32 - LMT 1890 | |
-5:07:12 - KMT 1912 Feb # Kingston Mean Time | |
-5:00 TC E%sT | |
# British Virgin Is | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town | |
-4:00 - AST | |
# Virgin Is | |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] | |
Zone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie | |
-4:00 - AST |