X-Git-Url: https://git.saurik.com/apple/system_cmds.git/blobdiff_plain/1815bff58803503e37009deeb85cfa8c22acf9d9..2fc1e207eccd68aee093ed29dae719e77bac17dd:/zic.tproj/datfiles/northamerica diff --git a/zic.tproj/datfiles/northamerica b/zic.tproj/datfiles/northamerica index ee484cb..6e755b0 100644 --- a/zic.tproj/datfiles/northamerica +++ b/zic.tproj/datfiles/northamerica @@ -1,20 +1,29 @@ -# $OpenBSD: northamerica,v 1.5 1997/01/14 04:36:54 millert Exp $ -# @(#)northamerica 7.30 +# @(#)northamerica 7.69 # 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@elsie.nci.nih.gov for general use in the future). -# From Paul Eggert (1994-08-17): +# From Paul Eggert (1999-03-22): # A reliable and entertaining source about time zones is -# Derek Howse, Greenwich time and the discovery of the longitude, -# Oxford University Press (1980). +# 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 (1995-12-19): # A good source for time zone historical data in the US is # Thomas G. Shanks, The American Atlas (5th edition), @@ -22,9 +31,10 @@ # Make sure you have the errata sheet; the book is somewhat useless without it. # It is the source for the US and Puerto Rico entries below. -# From Paul Eggert (1996-06-12): +# From Paul Eggert (2001-03-06): # Daylight Saving Time was first suggested as a joke by Benjamin Franklin -# in his whimsical essay ``Turkey vs Eagle, McCauley is my Beagle'' (1784). +# 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 @@ -39,6 +49,16 @@ # them healthy, wealthy and wise in spite of themselves. # # -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday +# +# For more about the first ten years of DST in the United States, see +# Robert Garland's +# Ten years of daylight saving from the Pittsburgh standpoint +# (Carnegie Library of Pittsburgh, 1927). +# +# 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. @@ -49,10 +69,47 @@ # 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 +# : +# "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." +# (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. + # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S -Rule US 1918 1919 - Mar lastSun 2:00 1:00 W # War +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 max - Oct lastSun 2:00 0 S Rule US 1967 1973 - Apr lastSun 2:00 1:00 D @@ -60,6 +117,9 @@ 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 max - Apr Sun>=1 2:00 1:00 D +# +# H.R.177 +# (introduced 1999-01-06) would change April to March in the above rule. # From Bob Devine (1988-01-28): # ...Alaska (and Hawaii) had the timezone names changed in 1967. @@ -133,11 +193,21 @@ Rule US 1987 max - Apr Sun>=1 2:00 1:00 D # Samoa standard time # The law doesn't give abbreviations. # -# From Paul Eggert (1995-12-19): -# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions. -# Go with Shanks. +# 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". + + +# US eastern time, represented by New York + +# Connecticut, Delaware, District of Columbia, most of Florida, +# Georgia, southeast Indiana (Clark, Dearborn, Floyd, Harrison, and +# Ohio counties), eastern Kentucky, Maine, Maryland, Massachusetts, +# New Hampshire, New Jersey, New York, North Carolina, Ohio, +# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, +# Vermont, Virginia, West Virginia -# US Eastern time, represented by New York # 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 @@ -152,7 +222,17 @@ Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00 -5:00 NYC E%sT 1967 -5:00 US E%sT -# US Central time, represented by Chicago +# 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 + # 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 @@ -169,8 +249,19 @@ Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 -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 12:00 + -7:00 US M%sT 1992 Oct 25 02:00 + -6:00 US C%sT -# US Mountain time, represented by Denver +# 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, far eastern Oregon, +# 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 @@ -186,6 +277,11 @@ Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00 -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), +# 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 @@ -201,45 +297,63 @@ Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00 # Alaska # AK%sT is the modern abbreviation for -9:00 per USNO. # -# From Paul Eggert (1995-12-19): +# 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. We omit this transition, since we can't represent -# changes from Julian to Gregorian. +# 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. # # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Juneau -8:57:41 - LMT 1900 Aug 20 12:00 +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 1983 Oct 30 2:00 + -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT -Zone America/Yakutat -9:18:55 - LMT 1900 Aug 20 12:00 +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 Oct 30 2:00 + -9:00 US Y%sT 1983 Nov 30 -9:00 US AK%sT -Zone America/Anchorage -9:59:36 - LMT 1900 Aug 20 12:00 +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 1946 -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 -11:01:38 - LMT 1900 Aug 20 12:00 +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 -11:46:38 - LMT 1900 Aug 20 12:00 +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 # Shanks writes that part of southwest Alaska (e.g. Aniak) # switched from -11:00 to -10:00 on 1968-09-22 at 02:00, @@ -263,31 +377,52 @@ Zone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 -10:30 US H%sT 1947 Jun 8 2:00 -10:00 - HST -Zone Pacific/Midway -11:49:28 - LMT 1901 - -11:00 - NST 1967 Apr # N=Nome - -11:00 - BST 1983 Nov 30 # B=Bering - -11:00 - SST # S=Samoa - # 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 +# +# Daylight Saving Time web page (2002-01-23) 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 12:00 -7:00 US M%sT 1944 Jan 1 00:01 - -7:00 - MST 1944 Mar 17 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 + -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 12/28/87 that "Presently, only the +# 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 and eastern Oregon switched four weeks late in 1974. +# 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 eastern Oregon +# switched four weeks late in 1974. +# # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 -8:00 US P%sT 1923 May 13 2:00 @@ -297,6 +432,11 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 # Indiana # +# For a map of Indiana's time zone regions, see: +# +# What time is it in Indiana? +# (1999-04-06) +# # From Paul Eggert (1995-12-19): # Indiana generally observes either EST all year, or CST/CDT, # but areas near Cincinnati and Louisville use those cities' timekeeping @@ -316,6 +456,13 @@ Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 # So we reluctantly put them all in a subdirectory `America/Indiana'. # # Most of EST-only Indiana last observed DST in 1970. + +# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn: +# Pam Belluck reported in the New York Times (2001-01-31) that the +# Indiana Legislature is considering a bill to adopt DST statewide. +# Her article mentioned Vevay, whose post office observes a different +# time zone from Danner's Hardware across the street. + # 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 @@ -378,6 +525,7 @@ Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00 -5:00 - EST # Part of Kentucky left its clocks alone in 1974. +# This also includes a part of Indiana immediately adjacent to Louisville. # 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 @@ -396,15 +544,73 @@ Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 -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 +Link America/Louisville America/Kentucky/Louisville +# +# Wayne, Clinton, and Russell Counties, Kentucky +# +# From +# +# Lake Cumberland LIFE +# (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 +# +# Federal Register 65, 160 (2000-08-17), page 50154-50158. +# +# +Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 + -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 +# +# Federal Register 64, 203 (1999-10-21), page 56705-56707. +# +# 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 (1995-12-19): -# Shanks writes that Michigan started using standard time on 1885 Sep 18, -# but Howse (p 126) writes that Detroit kept +# 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 @@ -416,6 +622,11 @@ Zone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 # # 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 @@ -446,8 +657,15 @@ Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 -6:00 US C%sT # Navassa -# uninhabited - +# 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). # Old names, for S5 users @@ -463,12 +681,12 @@ Link Pacific/Honolulu HST ################################################################################ -# From Paul Eggert (1996-11-22): +# From Paul Eggert (1999-10-29): # A good source for time zone historical data outside the US is -# Thomas G. Shanks, The International Atlas (3rd edition), -# San Diego: ACS Publications, Inc. (1991). +# Thomas G. Shanks, The International Atlas (5th edition), +# San Diego: ACS Publications, Inc. (1999). # -# Gwillim Law writes that a good source +# 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 @@ -477,13 +695,17 @@ Link Pacific/Honolulu HST # Except where otherwise noted, Shanks is the source for entries through 1990, # and IATA SSIM is the source for entries after 1990. # -# Another source occasionally used is Edward W. Whitman, World Time Differences, -# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which -# I found in the UCLA library. +# Other sources occasionally used include: # -# See the `europe' file for Greenland. +# Edward W. Whitman, World Time Differences, +# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), +# which I found in the UCLA library. +# +# +# William Willett, The Waste of Daylight, 19th edition +# (1914-03) # -# See the `africa' file for time zone naming and abbreviation conventions. +# See the `europe' file for Greenland. # Canada @@ -519,68 +741,90 @@ Link Pacific/Honolulu HST # From Paul Eggert (1994-11-22): # Alas, this sort of thing must be handled by localization software. -# The data for Canada are all from Shanks (1991). +# Unless otherwise specified, the data for Canada are all from Shanks. +# From Paul Eggert (2000-10-02): +# H. David Matthews and Mary Vincent's map +# +# "It's about TIME", _Canadian Geographic_ (September-October 1998) +# 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 +# +# information about standard and daylight saving time zones in Canada. +# (updated periodically). +# Its unofficial information is often taken from Matthews and Vincent. # 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 31 2:00 0 S -Rule Canada 1942 only - Feb 9 2:00 1:00 D +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 max - Oct lastSun 2:00 0 S Rule Canada 1987 max - Apr Sun>=1 2:00 1:00 D -# Newfoundland (except Labrador) +# Newfoundland (and far southeast 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 1918 - Apr Sun>=8 2:00 1:00 D +Rule StJohns 1917 only - Apr 8 2:00 1:00 D Rule StJohns 1917 only - Sep 17 2:00 0 S -Rule StJohns 1918 only - Oct 31 2:00 0 S # Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. 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. 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 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman. -Rule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D -Rule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S -# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman. -Rule StJohns 1942 only - Mar 1 0:00 1:00 D -Rule StJohns 1942 only - Dec 31 0:00 0 S -Rule StJohns 1943 only - May 30 0:00 1:00 D -Rule StJohns 1943 only - Sep 5 0:00 0 S -Rule StJohns 1944 only - Jul 10 0:00 1:00 D -Rule StJohns 1944 only - Sep 2 0:00 0 S -Rule StJohns 1945 only - Jan 1 0:00 1:00 D -Rule StJohns 1945 only - Oct 7 2:00 0 S +# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks. +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 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. 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 max - Oct lastSun 2:00 0 S -Rule StJohns 1987 only - Apr Sun>=1 2:00 1:00 D -Rule StJohns 1988 only - Apr Sun>=1 2:00 2:00 DD -Rule StJohns 1989 max - Apr Sun>=1 2:00 1:00 D +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. +Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D +Rule StJohns 1987 max - Oct lastSun 0:01 0 S +Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD +Rule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D # 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 - -# east Labrador +# 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 StJohns NST 1919 + -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 @@ -594,11 +838,14 @@ Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay # Shanks also writes 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. +# From Paul Eggert (2000-10-02): +# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches +# at 00:01 local time. FIXME: verify and create a new Zone for this. + + # 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 1918 only - Apr 14 2:00 1:00 D -Rule Halifax 1918 only - Oct 31 2:00 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 @@ -617,6 +864,7 @@ 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 @@ -629,71 +877,190 @@ 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 1942 only - Feb 9 2:00 1:00 D -Rule Halifax 1945 1959 - Sep lastSun 2:00 0 S -Rule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D -Rule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D -Rule Halifax 1962 max - Oct lastSun 2:00 0 S -Rule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D +Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S +Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D +Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S +Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D +Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S +Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D +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 + -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 + -4:00 Halifax A%sT 1974 + -4:00 Canada A%sT # Ontario, Quebec # From Paul Eggert (1996-06-12): -# Shanks writes that since 1970 most of this region has been like Montreal. +# Shanks writes that since 1970 most of Ontario has been like Toronto, +# and most of Quebec has been like Montreal. # 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 +# +# Ontario Time Act (1990, Chapter T.9) +# +# 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. +# For what it's worth, Shanks says that Atikokan has agreed with +# Rainy River ever since standard time was introduced. + +# 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. +# They 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. +# We probably need Zones for far east Quebec and for Atikokan, +# but we don't know when their practices started. + # 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 1918 only - Apr 14 2:00 1:00 D -Rule Mont 1918 only - Oct 31 2:00 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 only - Oct 3 2:30 0 S +Rule Mont 1920 1922 - Oct Sun>=1 2:30 0 S Rule Mont 1921 only - May 1 2:00 1:00 D -Rule Mont 1921 only - Oct 2 2:30 0 S Rule Mont 1922 only - Apr 30 2:00 1:00 D -Rule Mont 1922 only - Oct 1 2:30 0 S 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 -Rule Mont 1927 only - May 1 0:00 1:00 D -Rule Mont 1927 1932 - Sep Sun>=25 0:00 0 S -Rule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D -Rule Mont 1932 only - May 1 0:00 1:00 D -Rule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D -Rule Mont 1933 only - Oct 1 0:00 0 S -Rule Mont 1934 1939 - Sep Sun>=24 0:00 0 S +# 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 1946 1986 - Apr lastSun 2:00 1:00 D Rule Mont 1949 1950 - Oct lastSun 2:00 0 S Rule Mont 1951 1956 - Sep lastSun 2:00 0 S -Rule Mont 1957 max - Oct lastSun 2:00 0 S -Rule Mont 1987 max - Apr Sun>=1 2:00 1:00 D +Rule Mont 1957 1973 - Oct lastSun 2:00 0 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 says 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 says Toronto ended DST a week early in 1971, namely on 1971-10-24, +# but Mark Brader wrote (2003-05-31) that he checked the 1971-10-30 issue +# of the Toronto Star, and it said that DST ended 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/Montreal -4:54:16 - LMT 1884 - -5:00 Mont E%sT + -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 +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 -6:17:56 - 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 @@ -706,7 +1073,8 @@ Rule Winn 1918 only - Apr 14 2:00 1:00 D Rule Winn 1918 only - Oct 31 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 D +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 @@ -721,8 +1089,12 @@ 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 2:00 1:00 D -Rule Winn 1966 max - Oct lastSun 2:00 0 S +Rule Winn 1966 1986 - Oct lastSun 2:00 0 S Rule Winn 1987 max - Apr Sun>=1 2:00 1:00 D +# From Paul Eggert (2000-10-02): +# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from +# DST at 03:00 local time. For now, assume it started in 1987. +Rule Winn 1987 max - Oct lastSun 2:00s 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 -6:00 Winn C%sT @@ -730,10 +1102,26 @@ Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 # Saskatchewan -# From Paul Eggert (1996-06-12): +# 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 (2000-10-02): # Shanks writes that since 1970 most of this region has been like 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 @@ -770,12 +1158,14 @@ 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 D +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 1959 - Apr lastSun 2:00 1:00 D -Rule Regina 1947 1958 - Sep lastSun 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 @@ -803,7 +1193,8 @@ 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 D +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 @@ -821,14 +1212,16 @@ Zone America/Edmonton -7:33:52 - LMT 1906 Sep # British Columbia -# From Paul Eggert (1996-06-12): +# From Paul Eggert (2000-10-02): # Shanks writes that since 1970 most of this region has been like Vancouver. -# Dawswon Creek uses MST. Much of east BC is like Edmonton. +# Dawson Creek uses MST. Much of east BC is like Edmonton. +# Matthews and Vincent (1998) write that Creston is like Dawson Creek. # 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 31 2:00 0 S -Rule Vanc 1942 only - Feb 9 2:00 1:00 D +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 @@ -844,11 +1237,10 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884 -7:00 - MST -# Northwest Territories, Yukon +# Northwest Territories, Nunavut, Yukon -# From Paul Eggert (1996-10-07): +# From Paul Eggert (1999-10-29): # Dawson switched to PST in 1973. Inuvik switched to MST in 1979. -# Shanks's table for Watson Lake is corrupted, so we have no data there. # 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; @@ -858,12 +1250,105 @@ Zone America/Dawson_Creek -8:00:56 - LMT 1884 # * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. # Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander. +# From Rives McDow (1999-09-04): +# Nunavut ... moved ... to incorporate the whole territory into one time zone. +# +# Nunavut moves to single time zone Oct. 31 +# +# +# 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): +# +# Basic Facts: The New Territory +# (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. +# We'll ignore the claim about Coral Harbour for now, +# since we have no further info. + +# 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 +# +# Nunatsiaq News (1999-11-19): +# 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 +# +# Nunavut now has two time zones +# (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 (2001-03-09).] + # 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 D +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 @@ -872,11 +1357,24 @@ Rule NT_YK 1980 max - Oct lastSun 2:00 0 S Rule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Pangnirtung -4:22:56 - LMT 1884 - -4:00 NT_YK A%sT -Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay - -5:00 NT_YK E%sT + -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 +Zone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 + -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 Zone America/Rankin_Inlet -6:08:40 - LMT 1884 - -6:00 NT_YK C%sT + -6:00 NT_YK C%sT 2000 Oct 29 2:00 + -5:00 - EST 2001 Apr 1 3:00 + -6:00 Canada C%sT +Zone America/Cambridge_Bay -7:00:20 - LMT 1884 + -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 -7:37:24 - LMT 1884 -7:00 NT_YK M%sT Zone America/Inuvik -8:54:00 - LMT 1884 @@ -894,139 +1392,253 @@ Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 # Mexico -# From Guy Harris: -# Rules are from the Official Airline Guide, Worldwide Edition, for 1987. -# Rules prior to 1987 are unknown. -# The comments in the OAG say "Only Ensenada, Mexicale, San Felipe and Tijuana -# observe DST." This is presumably Baja California Norte, above 28th parallel, -# as listed there; [there is also] "Baja California Sur and N. Pacific -# Coast (States of Sinaloa and Sonora)." - -# From Bob Devine (1988-01-28): -# The Federal District (where Mexico City is) has observed [DST] several -# times but not recently. +# From Paul Eggert (2001-03-05): +# The Investigation and Analysis Service of the +# Mexican Library of Congress (MLoC) has published a +# +# history of Mexican local time (in Spanish) +# . # -# I don't where to drawn the line in the North Baja area. 28th latitude -# sounds good -- but it may be higher (how far [d]o radio stations from -# San Diego affect culture?). -# -# The dates of DST probably go back to 1981. The rules are the same as -# US's. This is going to be a headache for US presidential electi[o]n years! - -# From Arthur David Olson (1988-02-13) -# Since the 1981 starting date is only "probable," we'll keep the 1987 -# starting date below. - -# From U. S. Naval Observatory (1989-01-19): -# MEXICO BAJA CAL N 7 H BEHIND UTC BAJA CALIFORNIA SUR AND -# MEXICO BAJA CAL N N. PACIFIC COAST (STATES -# MEXICO BAJA CAL N OF SINALOA AND SONORA) -# MEXICO BAJA CAL N 8 H BEHIND UTC ABOVE 28TH PARALLEL APR 3 -# MEXICO BAJA CAL N - OCT 29 -# MEXICO BAJA CAL N 7 H BEHIND UTC ABOVE 28TH PARALLEL APR 3 -# MEXICO BAJA CAL N - 0CT 29 -# MEXICO 6 H BEHIND UTC STATES OF DURANGO, -# MEXICO COAHUILA, NUEVO LEON, -# MEXICO TAMAULIPAS -# MEXICO 5 H BEHIND UTC STATES OF DURANGO, -# MEXICO COAHUILA, NUEVO LEON, -# MEXICO TAMAULIPAS APR 3 - OCT 29 -# MEXICO 6 H BEHIND UTC GENERAL MEXICO, STATES OF -# MEXICO CAMPECHE, QUINTANA ROO AND -# MEXICO YUCATAN - -# From Arthur David Olson (1989-01-21): -# April 3 fell on a Sunday in 1988; October 29 fell on a Sunday in 1989. Ahem. -# USNO claims there should be four Mexican zones rather than three: -# a zone that's GMT-8 with DST; a zone that's always GMT-7; -# a zone that's GMT-6 with DST; and a zone that's always GMT-6. - -# From Paul Eggert (1993-11-18): -# Shanks also says there are four zones, but disagrees about the fourth. -# Instead of GMT-6 with DST, he says there's GMT-8 without DST. +# Here are the discrepancies between Shanks and the MLoC. +# (In all cases we go with the MLoC.) +# Shanks reports that Baja was at -8:00 in 1922/1923. +# Shanks says the 1930 transition in Baja was 1930-11-16. +# Shanks reports no DST during summer 1931. +# Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01. +# Shanks does not report transitions for Baja in 1945 or 1948. +# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23. +# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00 +# on 1997-10-26 at 02:00. + +# 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 Paul Eggert (2000-07-26): +# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 +# and 1988 DST experiments. Go with spin.com.mx. # 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 ``Diario Oficial: Time Zone Changeover'', -# (1996-01-04). +# For an English translation of the decree, see +# +# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). +# + +# 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 +# (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): +# ... 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.... +# +# [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. + +# +# Official statute published by the Energy Department +# (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): +# +# +# James F. Smith writes in today's LA Times +# +# * 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" +# Palabra (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 Shanks (1991): # 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 D +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 max - Apr Sun>=1 2:00 1:00 D -Rule Mexico 1996 max - Oct lastSun 2:00 0 S -# -Rule BajaN 1950 1966 - Apr lastSun 2:00 1:00 D -Rule BajaN 1950 1961 - Sep lastSun 2:00 0 S -Rule BajaN 1961 1966 - Oct lastSun 2:00 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 +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 Mar 30 23:00 + -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 +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 +# Baja California Sur, Nayarit, Sinaloa 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 Mar 30 23:00 - -6:00 - CST 1942 Apr + -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 +# Baja California 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 16 - -8:00 - PST 1942 Apr - -7:00 - MST 1949 Jan 14 - -8:00 BajaN P%sT 1967 Apr lastSun 2:00 + -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 Nov 12 + -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 -Zone America/Ensenada -7:46:28 - LMT 1922 Jan 1 0:13:32 - -8:00 - PST 1927 Jun 10 23:00 - -7:00 - MST 1930 Nov 16 - -8:00 - PST 1942 Apr - -7:00 - MST 1949 Jan 14 - -8:00 - PST 1996 - -8:00 Mexico P%sT +# From Paul Eggert (2001-03-05): +# 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. However, Guy Harris reports +# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and +# Tijuana observe DST," which contradicts Shanks but does imply 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 @@ -1062,7 +1674,7 @@ 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 - BMT 1932 # Bridgetown Mean Time + -3:58:28 - BMT 1932 # Bridgetown Mean Time -4:00 Barb A%sT # Belize @@ -1087,15 +1699,10 @@ Zone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton # Cayman Is # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown - -5:07 - KMT 1912 Feb # Kingston Mean Time + -5:07:12 - KMT 1912 Feb # Kingston Mean Time -5:00 - EST -# Clipperton -# uninhabited - # Costa Rica -# Shanks gives some very odd dates for 1991, and stops there. -# For now, we won't guess further. # 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 @@ -1106,23 +1713,24 @@ 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 - SJMT 1921 Jan 15 # San Jose Mean Time + -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 Bob Devine (1988-01-28): -# . . .DST is from 2nd Sunday in May to 2nd Sunday in October since 1981. -# Change at midnight. In 1979 & 1980, started at 3rd Sunday in March -# (I think). - -# From U. S. Naval Observatory (1989-01-19): -# CUBA 5 H BEHIND UTC -# CUBA 4 H BEHIND UTC MAR 20 - OCT 8 +# 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 Shanks (1991): # 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 @@ -1142,18 +1750,21 @@ 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 1980 - Oct Sun>=8 0:00 0 S +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 1981 1990 - Oct Sun>=8 0:00 0 S Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D -Rule Cuba 1990 max - Apr Sun>=1 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 max - Oct Sun>=1 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 max - Oct lastSun 0:00s 0 S +Rule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Havana -5:29:28 - LMT 1890 - -5:30 - HMT 1925 Jul 19 12:00 # Havana MT + -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT -5:00 Cuba C%sT # Dominica @@ -1162,6 +1773,25 @@ 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 @@ -1173,13 +1803,16 @@ Rule DR 1972 1974 - Jan 21 0:00 0 S 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 we'll use `El Salvador'. +# 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 @@ -1211,9 +1844,9 @@ Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 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 says AT is 2:00, but IATA SSIM (1991/1996) says 1:00s. Go with IATA. -Rule Haiti 1988 max - Apr Sun>=1 1:00s 1:00 D -Rule Haiti 1988 max - Oct lastSun 1:00s 0 S +# Shanks says 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 # 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 @@ -1224,6 +1857,8 @@ Zone America/Port-au-Prince -4:49:20 - LMT 1890 # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr -6:00 Salv C%sT +# +# Great Swan I ceded by US to Honduras in 1972 # Jamaica @@ -1233,28 +1868,36 @@ Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr # From U. S. Naval Observatory (1989-01-19): # JAMAICA 5 H BEHIND UTC -# From Shanks (1991): +# From Shanks: # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Jamaica -5:07:12 - LMT 1890 # Kingston - -5:07 - KMT 1912 Feb # Kingston Mean Time - -5:00 - EST 1974 Jan 6 2:00 + -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 - FFMT 1911 May # Fort-de-France MT + -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 (1997-08-31): +# Recent volcanic eruptions have forced evacuation of Plymouth, the capital. +# Luckily, Olveston, the current de facto capital, has the same longitude. # Zone NAME GMTOFF RULES FORMAT [UNTIL] -Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Plymouth +Zone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston -4:00 - AST # Nicaragua +# +# From Steffen Thorsen (1998-12-29): +# Nicaragua seems to be back at -6:00 but I have not been able to find when +# they changed from -5:00. +# # 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 @@ -1262,16 +1905,17 @@ Rule Nic 1992 only - Jan 1 4:00 1:00 D Rule Nic 1992 only - Sep 24 0:00 0 S # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Managua -5:45:08 - LMT 1890 - -5:45 - MMT 1934 Jun 23 # Managua Mean Time + -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 1993 Jan 1 4:00 - -5:00 - EST + -5:00 - EST 1998 Dec + -6:00 - CST # Panama # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Panama -5:18:08 - LMT 1890 - -5:20 - PMT 1908 Apr 22 # Panama Mean Time + -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time -5:00 - EST # Puerto Rico @@ -1290,7 +1934,7 @@ Zone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre # St Lucia # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries - -4:04 - CMT 1912 # Castries Mean Time + -4:04:00 - CMT 1912 # Castries Mean Time -4:00 - AST # St Pierre and Miquelon @@ -1298,17 +1942,18 @@ Zone America/St_Lucia -4:04:00 - LMT 1890 # Castries # 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 Mont PM%sT # Pierre & Miquelon Time + -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 - -4:05 - KMT 1912 # Kingstown Mean Time + -4:04:56 - KMT 1912 # Kingstown Mean Time -4:00 - AST # Turks and Caicos -# From Paul Eggert (1996-11-22): -# Shanks says they use US DST rules, but IATA SSIM (1991/1996) +# From Paul Eggert (1998-08-06): +# Shanks says they use US DST rules, but IATA SSIM (1991/1998) # says they switch at midnight. Go with IATA SSIM. # Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S Rule TC 1979 1986 - Apr lastSun 0:00 1:00 D @@ -1316,7 +1961,7 @@ Rule TC 1979 max - Oct lastSun 0:00 0 S Rule TC 1987 max - Apr Sun>=1 0:00 1:00 D # Zone NAME GMTOFF RULES FORMAT [UNTIL] Zone America/Grand_Turk -4:44:32 - LMT 1890 - -5:07 - KMT 1912 Feb # Kingston Mean Time + -5:07:12 - KMT 1912 Feb # Kingston Mean Time -5:00 TC E%sT # British Virgin Is