northamerica revision 138323
1138323Swollman# @(#)northamerica 7.70 22742Swollman# also includes Central America and the Caribbean 32742Swollman 42742Swollman# This data is by no means authoritative; if you think you know better, 52742Swollman# go ahead and edit the file (and please send any changes to 62742Swollman# tz@elsie.nci.nih.gov for general use in the future). 72742Swollman 858787Sru# From Paul Eggert <eggert@twinsun.com> (1999-03-22): 92742Swollman# A reliable and entertaining source about time zones is 1058787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 112742Swollman 122742Swollman############################################################################### 132742Swollman 142742Swollman# United States 152742Swollman 1658787Sru# From Paul Eggert (1999-03-31): 1758787Sru# Howse writes (pp 121-125) that time zones were invented by 1858787Sru# Professor Charles Ferdinand Dowd (1825-1904), 1958787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 2058787Sru# His pamphlet ``A System of National Time for Railroads'' (1870) 2158787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2258787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2358787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2458787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2558787Sru# and the most of the country soon followed suit. 2658787Sru 2714343Swollman# From Paul Eggert <eggert@twinsun.com> (1995-12-19): 2814343Swollman# A good source for time zone historical data in the US is 2914343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3014343Swollman# San Diego: ACS Publications, Inc. (1991). 3114343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 3214343Swollman# It is the source for the US and Puerto Rico entries below. 3314343Swollman 3475267Swollman# From Paul Eggert (2001-03-06): 3517200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 3675267Swollman# in his whimsical essay ``An Economical Project for Diminishing the Cost 3775267Swollman# of Light'' published in the Journal de Paris (1784-04-26). 3817200Swollman# Not everyone is happy with the results: 3917200Swollman# 4017200Swollman# I don't really care how time is reckoned so long as there is some 4117200Swollman# agreement about it, but I object to being told that I am saving 4217200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 4317200Swollman# I even object to the implication that I am wasting something 4417200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 4517200Swollman# of moonlight I resent the bossy insistence of those who want to 4617200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 4717200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 4817200Swollman# to push people into bed earlier, and get them up earlier, to make 4917200Swollman# them healthy, wealthy and wise in spite of themselves. 5017200Swollman# 5117200Swollman# -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday 5275267Swollman# 5375267Swollman# For more about the first ten years of DST in the United States, see 5475267Swollman# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 5575267Swollman# Ten years of daylight saving from the Pittsburgh standpoint 5675267Swollman# (Carnegie Library of Pittsburgh, 1927)</a>. 5775267Swollman# 5875267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 5975267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6075267Swollman# was the first nationwide legal time standard, and apparently 6175267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 6217200Swollman 632742Swollman# From Arthur David Olson: 642742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 6519878Swollman# See, for example, the front page of the Saturday, 1974-10-26 6619878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 672742Swollman 682742Swollman# From Arthur David Olson: 692742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 702742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 712742Swollman 7267578Swollman# From Arthur David Olson (2000-09-25): 7367578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 7467578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 7567578Swollman# An AltaVista search turned up 7667578Swollman# <a href="http://rowayton.org/rhs/hstaug45.html">: 7767578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 7867578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 7967578Swollman# </a> (August 1945) by way of confirmation. 8067578Swollman 8167578Swollman# From Joseph Gallant <notquite@hotmail.com>, citing 8267578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 8367578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 8486222Swollman# to switch to London for Attlee's address, but the American people 8567578Swollman# never got to hear his speech live. According to one press account, 8667578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 8767578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 8867578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 8986222Swollman# London which were to precede Mr. Attlee's speech. 9067578Swollman 91114173Swollman# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From 92114173Swollman# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: 93114173Swollman# 94114173Swollman# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. 95114173Swollman# Any announcement from Asia would reach St. John's New York newsroom on a 96114173Swollman# wire service teletype machine, which had prescribed signals for major news. 97114173Swollman# Associated Press, for example, would ring five bells before spewing out 98114173Swollman# typed copy of an important story, and 10 bells for news "of transcendental 99114173Swollman# importance." 100114173Swollman# 101114173Swollman# On Aug. 14, stalling while talking steadily into the NBC networks' open 102114173Swollman# microphone, St. John heard five bells and waited only to hear a sixth bell, 103114173Swollman# before announcing confidently: "Ladies and gentlemen, World War II is over. 104114173Swollman# The Japanese have agreed to our surrender terms." 105114173Swollman# 106114173Swollman# He had scored a 20-second scoop on other broadcasters. 107114173Swollman 1082742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 10975267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 1102742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 1112742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 11267578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 1132742SwollmanRule US 1945 only - Sep 30 2:00 0 S 1142742SwollmanRule US 1967 max - Oct lastSun 2:00 0 S 1152742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1162742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1172742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1182742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 1192742SwollmanRule US 1987 max - Apr Sun>=1 2:00 1:00 D 12043543Swollman# <a href="http://thomas.loc.gov/cgi-bin/bdquery/z?d106:h.r.00177:"> 12143543Swollman# H.R.177 12243543Swollman# </a> (introduced 1999-01-06) would change April to March in the above rule. 1232742Swollman 12419878Swollman# From Bob Devine (1988-01-28): 1252742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1262742Swollman# old new 1272742Swollman# Pacific Standard Time(PST) -same- 1282742Swollman# Yukon Standard Time(YST) -same- 1292742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1302742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1312742Swollman# 1322742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1332742Swollman# The YST zone now covers nearly all of the state, AHST just part 1342742Swollman# of the Aleutian islands. No DST. 1352742Swollman 13614343Swollman# From Paul Eggert (1995-12-19): 13714343Swollman# The tables below use `NST', not `NT', for Nome Standard Time. 13814343Swollman# I invented `CAWT' for Central Alaska War Time. 13914343Swollman 14019878Swollman# From U. S. Naval Observatory (1989-01-19): 1412742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1422742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1432742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1442742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1452742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1462742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1472742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1482742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1492742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1502742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1512742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 1522742Swollman# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 1532742Swollman# USA HAWAII 10 H BEHIND UTC 1542742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1552742Swollman 15619878Swollman# From Arthur David Olson (1989-01-21): 1572742Swollman# The above dates are for 1988. 1582742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1592742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1602742Swollman# Aleutians. 1612742Swollman 16219878Swollman# From Arthur David Olson (1988-02-13): 1632742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1642742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 16519878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 1662742Swollman# took effect), as explained in sections 263 and 261: 1672742Swollman# (none) 1682742Swollman# United States standard eastern time 1692742Swollman# United States standard mountain time 1702742Swollman# United States standard central time 1712742Swollman# United States standard Pacific time 1722742Swollman# (none) 1732742Swollman# United States standard Alaska time 1742742Swollman# (none) 17519878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 1762742Swollman# public law 98-181): 1772742Swollman# Atlantic standard time 1782742Swollman# eastern standard time 1792742Swollman# central standard time 1802742Swollman# mountain standard time 1812742Swollman# Pacific standard time 1822742Swollman# Yukon standard time 1832742Swollman# Alaska-Hawaii standard time 1842742Swollman# Bering standard time 18519878Swollman# And after 1983-11-30: 1862742Swollman# Atlantic standard time 1872742Swollman# eastern standard time 1882742Swollman# central standard time 1892742Swollman# mountain standard time 1902742Swollman# Pacific standard time 1912742Swollman# Alaska standard time 1922742Swollman# Hawaii-Aleutian standard time 1932742Swollman# Samoa standard time 1942742Swollman# The law doesn't give abbreviations. 19514343Swollman# 19675267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 19775267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 19875267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 19975267Swollman# See the file "australasia". 2002742Swollman 20186464Swollman 20286222Swollman# US eastern time, represented by New York 20375267Swollman 20467578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 205114173Swollman# Georgia, southeast Indiana (Clark, Dearborn, Floyd, Harrison, and 206114173Swollman# Ohio counties), eastern Kentucky, Maine, Maryland, Massachusetts, 207114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 208114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 209114173Swollman# Vermont, Virginia, West Virginia 21067578Swollman 21114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 21214343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 21314343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 21414343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 21514343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 21614343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 21714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21814343SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00 21914343Swollman -5:00 US E%sT 1920 22014343Swollman -5:00 NYC E%sT 1942 22114343Swollman -5:00 US E%sT 1946 22214343Swollman -5:00 NYC E%sT 1967 22314343Swollman -5:00 US E%sT 2242742Swollman 22586222Swollman# US central time, represented by Chicago 22667578Swollman 227136638Swollman# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, 228136638Swollman# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and 229136638Swollman# Washington counties), Illinois, western Indiana 230114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 231114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 232114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 233114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 234114173Swollman# western Tennessee, most of Texas, Wisconsin 23567578Swollman 23614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 23714343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 23814343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 23914343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 24014343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 24114343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 24214343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 24314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24414343SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 24514343Swollman -6:00 US C%sT 1920 24614343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 24714343Swollman -5:00 - EST 1936 Nov 15 2:00 24814343Swollman -6:00 Chicago C%sT 1942 24914343Swollman -6:00 US C%sT 1946 25014343Swollman -6:00 Chicago C%sT 1967 25114343Swollman -6:00 US C%sT 25286222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 25386222SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:00 25486222Swollman -7:00 US M%sT 1992 Oct 25 02:00 25586222Swollman -6:00 US C%sT 2562742Swollman 25786222Swollman# US mountain time, represented by Denver 25867578Swollman# 259136638Swollman# Colorado, far western Kansas, Montana, western 26086222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 26186222Swollman# New Mexico, southwestern North Dakota, far eastern Oregon, 26275267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 26375267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 26467578Swollman# 26514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 26614343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 26714343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 26814343SwollmanRule Denver 1921 only - May 22 2:00 0 S 26914343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 27014343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 2712742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27214343SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00 27315309Swollman -7:00 US M%sT 1920 27415309Swollman -7:00 Denver M%sT 1942 27515309Swollman -7:00 US M%sT 1946 27615309Swollman -7:00 Denver M%sT 1967 27715309Swollman -7:00 US M%sT 2782742Swollman 27914343Swollman# US Pacific time, represented by Los Angeles 28067578Swollman# 281136638Swollman# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, 282136638Swollman# Idaho, Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties), 283136638Swollman# most of Nevada, most of Oregon, and Washington 28467578Swollman# 28514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 28614343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 28714343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 28814343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 28914343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 29014343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 29114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29214343SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00 29314343Swollman -8:00 US P%sT 1946 29414343Swollman -8:00 CA P%sT 1967 29514343Swollman -8:00 US P%sT 2968029Swollman 29714343Swollman# Alaska 29814343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 29914343Swollman# 30086222Swollman# From Paul Eggert (2001-05-30): 30114343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 30219878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 30375267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 30475267Swollman# also a Friday. Include only the time zone part of this transition, 30575267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 30675267Swollman# the Julian calendar. 30714343Swollman# 30886222Swollman# As far as we know, none of the exact locations mentioned below were 30986222Swollman# permanently inhabited in 1867 by anyone using either calendar. 31086222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 31186222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 31286222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 31386222Swollman# it's best to simply use the official transition. 31486222Swollman# 31514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 31675267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 31775267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 31814343Swollman -8:00 - PST 1942 31914343Swollman -8:00 US P%sT 1946 32014343Swollman -8:00 - PST 1969 32114343Swollman -8:00 US P%sT 1983 Oct 30 2:00 322136638Swollman -9:00 US Y%sT 1983 Nov 30 32314343Swollman -9:00 US AK%sT 32475267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 32575267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 32614343Swollman -9:00 - YST 1942 32714343Swollman -9:00 US Y%sT 1946 32814343Swollman -9:00 - YST 1969 329136638Swollman -9:00 US Y%sT 1983 Nov 30 33014343Swollman -9:00 US AK%sT 33175267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 33275267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 33314343Swollman -10:00 - CAT 1942 33414343Swollman -10:00 US CAT/CAWT 1946 33514343Swollman -10:00 - CAT 1967 Apr 33614343Swollman -10:00 - AHST 1969 33714343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 338136638Swollman -9:00 US Y%sT 1983 Nov 30 33914343Swollman -9:00 US AK%sT 34075267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 34175267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 34214343Swollman -11:00 - NST 1942 34314343Swollman -11:00 US N%sT 1946 34414343Swollman -11:00 - NST 1967 Apr 34514343Swollman -11:00 - BST 1969 34614343Swollman -11:00 US B%sT 1983 Oct 30 2:00 347136638Swollman -9:00 US Y%sT 1983 Nov 30 34814343Swollman -9:00 US AK%sT 34975267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 35075267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 35114343Swollman -11:00 - NST 1942 35214343Swollman -11:00 US N%sT 1946 35314343Swollman -11:00 - NST 1967 Apr 35414343Swollman -11:00 - BST 1969 35514343Swollman -11:00 US B%sT 1983 Oct 30 2:00 356136638Swollman -10:00 US AH%sT 1983 Nov 30 35714343Swollman -10:00 US HA%sT 35814343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 35914343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 36014343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 36114343Swollman# These switches don't quite make our 1970 cutoff. 3622742Swollman 36314343Swollman# Hawaii 36414343Swollman# 36514343Swollman# From Arthur David Olson: 36614343Swollman# And then there's Hawaii. 36714343Swollman# DST was observed for one day in 1933; 36814343Swollman# standard time was changed by half an hour in 1947; 36914343Swollman# it's always standard as of 1986. 37014343Swollman# 37114343Swollman# From Paul Eggert: 37214343Swollman# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 37314343Swollman# 37414343SwollmanZone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 37514343Swollman -10:30 - HST 1933 Apr 30 2:00 37614343Swollman -10:30 1:00 HDT 1933 May 21 2:00 37714343Swollman -10:30 US H%sT 1947 Jun 8 2:00 37814343Swollman -10:00 - HST 3792742Swollman 38014343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 38114343Swollman 38214343Swollman# Arizona mostly uses MST. 383114173Swollman 384114173Swollman# From Paul Eggert (2002-10-20): 385114173Swollman# 386114173Swollman# The information in the rest of this paragraph is derived from the 387114173Swollman# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 388114173Swollman# Daylight Saving Time web page (2002-01-23)</a> maintained by the 389114173Swollman# Arizona State Library, Archives and Public Records. 390114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 391114173Swollman# time, but by federal law railroads, airlines, bus lines, military 392114173Swollman# personnel, and some engaged in interstate commerce continued to 393114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 394114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 395114173Swollman# the date the state's clocks would change. In 1945 the State of 396114173Swollman# Arizona used standard time all year, again with exceptions only as 397114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 398114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 399114173Swollman# 400114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 401114173Swollman# Go with the Arizona State Library instead. 402114173Swollman 40314343SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00 40414343Swollman -7:00 US M%sT 1944 Jan 1 00:01 405114173Swollman -7:00 - MST 1944 Apr 1 00:01 40614343Swollman -7:00 US M%sT 1944 Oct 1 00:01 40714343Swollman -7:00 - MST 1967 408114173Swollman -7:00 US M%sT 1968 Mar 21 40914343Swollman -7:00 - MST 41019878Swollman# From Arthur David Olson (1988-02-13): 41114343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 412136638Swollman# notes in private correspondence dated 1987-12-28 that "Presently, only the 4132742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 4142742Swollman# large size and location in three states." (The "only" means that other 4152742Swollman# tribal nations don't use DST.) 4162742Swollman 41714343SwollmanLink America/Denver America/Shiprock 4182742Swollman 419136638Swollman# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, 420136638Swollman# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, 421136638Swollman# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, 422136638Swollman# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, 423136638Swollman# Teton, Twin Falls, Valley, Washington counties) and eastern Oregon 424136638Swollman# switched four weeks late in 1974. 425136638Swollman# 42614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 42714343SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 42814343Swollman -8:00 US P%sT 1923 May 13 2:00 42914343Swollman -7:00 US M%sT 1974 43014343Swollman -7:00 - MST 1974 Feb 3 2:00 43114343Swollman -7:00 US M%sT 4322742Swollman 43314343Swollman# Indiana 43414343Swollman# 43558787Sru# For a map of Indiana's time zone regions, see: 43658787Sru# <a href="http://www.mccsc.edu/time.html"> 43758787Sru# What time is it in Indiana? 43858787Sru# </a> (1999-04-06) 43958787Sru# 44014343Swollman# From Paul Eggert (1995-12-19): 44114343Swollman# Indiana generally observes either EST all year, or CST/CDT, 44214343Swollman# but areas near Cincinnati and Louisville use those cities' timekeeping 44314343Swollman# and in 1969 and 1970 the whole state observed daylight time; 44414343Swollman# and there are other exceptions as noted below. 44514343Swollman# Shanks partitions Indiana into 345 regions, each with its own time history, 44614343Swollman# and writes ``Even newspaper reports present contradictory information.'' 44714343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 44814343Swollman# 44914343Swollman# Since 1970, EST-only Indiana has been like America/Indianapolis, 45014343Swollman# with exceptions noted below for Crawford, Starke, and Switzerland counties. 45114343Swollman# The parts of Indiana not listed below have been like America/Chicago, 45214343Swollman# America/Louisville, or America/New_York. 45314343Swollman# 45414343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 45514343Swollman# that they would be ambiguous if we left them at the `America' level. 45614343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 45714343Swollman# 45814343Swollman# Most of EST-only Indiana last observed DST in 1970. 45975267Swollman 46075267Swollman# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn: 46175267Swollman# Pam Belluck reported in the New York Times (2001-01-31) that the 46275267Swollman# Indiana Legislature is considering a bill to adopt DST statewide. 46375267Swollman# Her article mentioned Vevay, whose post office observes a different 46486222Swollman# time zone from Danner's Hardware across the street. 46575267Swollman 46614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 46714343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 46814343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 46914343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 47014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 47114343SwollmanZone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00 47214343Swollman -6:00 US C%sT 1920 47314343Swollman -6:00 Indianapolis C%sT 1942 47414343Swollman -6:00 US C%sT 1946 47514343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 47614343Swollman -5:00 - EST 1957 Sep 29 2:00 47714343Swollman -6:00 - CST 1958 Apr 27 2:00 47814343Swollman -5:00 - EST 1969 47914343Swollman -5:00 US E%sT 1971 48014343Swollman -5:00 - EST 48114343SwollmanLink America/Indianapolis America/Indiana/Indianapolis 4822742Swollman# 48314343Swollman# Part of Crawford County, Indiana, last observed DST in 1975, 48414343Swollman# and left its clocks alone in 1974. 48514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 48614343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 48714343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 48814343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 48914343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 49014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 49114343SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00 49214343Swollman -6:00 US C%sT 1951 49314343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 49414343Swollman -5:00 - EST 1969 49514343Swollman -5:00 US E%sT 1974 Jan 6 2:00 49614343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 49714343Swollman -5:00 US E%sT 1976 49814343Swollman -5:00 - EST 49914343Swollman# 50014343Swollman# Starke County, Indiana 50119878Swollman# From Arthur David Olson (1991-10-28): 50219878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 50314343Swollman# notes that Starke County switched from Central time to Eastern time as of 50419878Swollman# 1991-10-27. 50514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 50614343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 50714343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 50814343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 50914343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 51014343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 51114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 51214343SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00 51314343Swollman -6:00 US C%sT 1947 51414343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 51514343Swollman -5:00 - EST 1963 Oct 27 2:00 51614343Swollman -6:00 US C%sT 1991 Oct 27 2:00 51714343Swollman -5:00 - EST 51814343Swollman# 51914343Swollman# Switzerland County, Indiana, last observed DST in 1972. 52014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 52114343SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00 52214343Swollman -6:00 US C%sT 1954 Apr 25 2:00 52314343Swollman -5:00 - EST 1969 52414343Swollman -5:00 US E%sT 1973 52514343Swollman -5:00 - EST 5262742Swollman 52714343Swollman# Part of Kentucky left its clocks alone in 1974. 52867578Swollman# This also includes a part of Indiana immediately adjacent to Louisville. 52914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 53014343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 53114343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 53214343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 53314343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 53414343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 53514343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 53614343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 53714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 53814343SwollmanZone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 53914343Swollman -6:00 US C%sT 1921 54014343Swollman -6:00 Louisville C%sT 1942 54114343Swollman -6:00 US C%sT 1946 54214343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 54314343Swollman -5:00 - EST 1968 54414343Swollman -5:00 US E%sT 1974 Jan 6 2:00 54514343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 54614343Swollman -5:00 US E%sT 54767578SwollmanLink America/Louisville America/Kentucky/Louisville 54867578Swollman# 54958787Sru# Wayne, Clinton, and Russell Counties, Kentucky 55058787Sru# 55158787Sru# From 55258787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 55358787Sru# Lake Cumberland LIFE 55458787Sru# </a> (1999-01-29) via WKYM-101.7: 55558787Sru# Clinton County has joined Wayne County in asking the DoT to change from 55658787Sru# the Central to the Eastern time zone.... The Wayne County government made 55758787Sru# the same request in December. And while Russell County officials have not 55858787Sru# taken action, the majority of respondents to a poll conducted there in 55958787Sru# August indicated they would like to change to "fast time" also. 56058787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 56158787Sru# location in the Central time zone. 56267578Swollman# 56367578Swollman# From Rich Wales (2000-08-29): 56467578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 56567578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 56675267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 56775267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 56886222Swollman# 56986222Swollman# From Paul Eggert (2001-07-16): 57086222Swollman# The final rule was published in the 57186222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 57286222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 57386222Swollman# </a> 574114173Swollman# 57567578SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 57667578Swollman -6:00 US C%sT 1946 57767578Swollman -6:00 - CST 1968 57867578Swollman -6:00 US C%sT 2000 Oct 29 2:00 57967578Swollman -5:00 US E%sT 5802742Swollman 58167578Swollman 58267578Swollman# From Rives McDow (2000-08-30): 58367578Swollman# Here ... are all the changes in the US since 1985. 58467578Swollman# Kearny County, KS (put all of county on central; 58567578Swollman# previously split between MST and CST) ... 1990-10 58667578Swollman# Starke County, IN (from CST to EST) ... 1991-10 58767578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 58867578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 58967578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 59067578Swollman# 59186222Swollman# From Paul Eggert (2001-07-17): 59286222Swollman# We don't know where the line used to be within Kearny County, KS, 59386222Swollman# so omit that change for now. 59486222Swollman# See America/Indiana/Knox for the Starke County, IN change. 59586222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 59686222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 59786222Swollman# 1999-10-31. See the 59886222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 59986222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 60086222Swollman# </a> 60186222Swollman# However, the Federal Register says that West Wendover already operated 60286222Swollman# on mountain time, and the rule merely made this official; 60386222Swollman# hence a separate tz entry is not needed. 60467578Swollman 60514343Swollman# Michigan 60614343Swollman# 60719878Swollman# From Bob Devine (1988-01-28): 60814343Swollman# Michigan didn't observe DST from 1968 to 1973. 60914343Swollman# 61058787Sru# From Paul Eggert (1999-03-31): 61158787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 61258787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 61358787Sru# that Detroit kept 61414343Swollman# 61514343Swollman# local time until 1900 when the City Council decreed that clocks should 61614343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 61714343Swollman# city obeyed, half refused. After considerable debate, the decision 61814343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 61914343Swollman# erect a sundial in front of the city hall was referred to the 62014343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 62114343Swollman# by city vote. 62214343Swollman# 62314343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 62414343Swollman# 62575267Swollman# From Paul Eggert (2001-03-06): 62675267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 62775267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 62875267Swollman# info, so omit this for now. 62975267Swollman# 63014343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 63114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 63214343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 63314343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 63414343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 63514343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 63614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 63714343SwollmanZone America/Detroit -5:32:11 - LMT 1905 63814343Swollman -6:00 - CST 1915 May 15 2:00 63914343Swollman -5:00 - EST 1942 64014343Swollman -5:00 US E%sT 1946 64114343Swollman -5:00 Detroit E%sT 1973 64214343Swollman -5:00 US E%sT 1975 64314343Swollman -5:00 - EST 1975 Apr 27 2:00 64414343Swollman -5:00 US E%sT 64514343Swollman# 64614343Swollman# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973. 64714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 64814343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 64914343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 65014343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 65114343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 65214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 65314343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 65414343Swollman -6:00 US C%sT 1946 65514343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 65614343Swollman -5:00 - EST 1973 Apr 29 2:00 65714343Swollman -6:00 US C%sT 65814343Swollman 6592742Swollman# Navassa 66086222Swollman# administered by the US Fish and Wildlife Service 66143543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 66243543Swollman# also claimed by Haiti 66343543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 66486222Swollman# US lighthouse 1917/1996-09 66543543Swollman# currently uninhabited 66643543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 66743543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 66843543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 66914343Swollman 67019878Swollman# Old names, for S5 users 67119878Swollman 67219878Swollman# Link LINK-FROM LINK-TO 67319878SwollmanLink America/New_York EST5EDT 67419878SwollmanLink America/Chicago CST6CDT 67519878SwollmanLink America/Denver MST7MDT 67619878SwollmanLink America/Los_Angeles PST8PDT 67719878SwollmanLink America/Indianapolis EST 67819878SwollmanLink America/Phoenix MST 67919878SwollmanLink Pacific/Honolulu HST 68019878Swollman 6812742Swollman################################################################################ 6822742Swollman 6832742Swollman 68458787Sru# From Paul Eggert <eggert@twinsun.com> (1999-10-29): 68514343Swollman# A good source for time zone historical data outside the US is 68658787Sru# Thomas G. Shanks, The International Atlas (5th edition), 68758787Sru# San Diego: ACS Publications, Inc. (1999). 6882742Swollman# 68986222Swollman# Gwillim Law writes that a good source 69020094Swollman# for recent time zone data is the International Air Transport 69120094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 69220094Swollman# published semiannually. Law sent in several helpful summaries 69320094Swollman# of the IATA's data after 1990. 69420094Swollman# 69520094Swollman# Except where otherwise noted, Shanks is the source for entries through 1990, 69620094Swollman# and IATA SSIM is the source for entries after 1990. 69720094Swollman# 698121098Swollman# Other sources occasionally used include: 6992742Swollman# 700121098Swollman# Edward W. Whitman, World Time Differences, 701121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 702121098Swollman# which I found in the UCLA library. 703121098Swollman# 704121098Swollman# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 705121098Swollman# William Willett, The Waste of Daylight, 19th edition 706121098Swollman# </a> (1914-03) 707121098Swollman# 7089908Swollman# See the `europe' file for Greenland. 7092742Swollman 7102742Swollman# Canada 7112742Swollman 7129908Swollman# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14): 7139908Swollman# I post here the time zone abbreviations standardized in Canada 7149908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 7159908Swollman# 7169908Swollman# UTC Standard time Daylight savings time 7179908Swollman# offset French English French English 7189908Swollman# -2:30 - - HAT NDT 7199908Swollman# -3 - - HAA ADT 7209908Swollman# -3:30 HNT NST - - 7219908Swollman# -4 HNA AST HAE EDT 7229908Swollman# -5 HNE EST HAC CDT 7239908Swollman# -6 HNC CST HAR MDT 7249908Swollman# -7 HNR MST HAP PDT 7259908Swollman# -8 HNP PST HAY YDT 7269908Swollman# -9 HNY YST - - 7279908Swollman# 7289908Swollman# HN: Heure Normale ST: Standard Time 7299908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 7309908Swollman# 7319908Swollman# A: de l'Atlantique Atlantic 7329908Swollman# C: du Centre Central 7339908Swollman# E: de l'Est Eastern 7349908Swollman# M: Mountain 7359908Swollman# N: Newfoundland 7369908Swollman# P: du Pacifique Pacific 7379908Swollman# R: des Rocheuses 7389908Swollman# T: de Terre-Neuve 7399908Swollman# Y: du Yukon Yukon 7409908Swollman# 7419908Swollman# From Paul Eggert <eggert@twinsun.com> (1994-11-22): 7429908Swollman# Alas, this sort of thing must be handled by localization software. 7432742Swollman 74467578Swollman# Unless otherwise specified, the data for Canada are all from Shanks. 7459908Swollman 74667578Swollman# From Paul Eggert (2000-10-02): 74767578Swollman# H. David Matthews and Mary Vincent's map 74867578Swollman# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm"> 74967578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 75067578Swollman# </a> contains detailed boundaries for regions observing nonstandard 75167578Swollman# time and daylight saving time arrangements in Canada circa 1998. 75267578Swollman# 75367578Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has 75467578Swollman# <a href="http://www.nrc.ca/inms/time/tze.html"> 75567578Swollman# information about standard and daylight saving time zones in Canada. 75667578Swollman# </a> (updated periodically). 75767578Swollman# Its unofficial information is often taken from Matthews and Vincent. 7589908Swollman 7592742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 76017200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 76117200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 762121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 763121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 76417200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 76517200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 76617200SwollmanRule Canada 1974 max - Oct lastSun 2:00 0 S 76717200SwollmanRule Canada 1987 max - Apr Sun>=1 2:00 1:00 D 76817200Swollman 76917200Swollman 77067578Swollman# Newfoundland (and far southeast Labrador) 77117200Swollman 77267578Swollman# From Paul Eggert (2000-10-02): 77367578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 77467578Swollman# but the only part of Labrador that follows the rules is the 77567578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 77667578Swollman# but excluding, say, Black Tickle. 77767578Swollman 77817200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 779121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 7802742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 7812742Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. 7822742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 7832742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 7842742Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks. 7852742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 7862742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 787121098Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks. 788121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 789121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 790121098Swollman# Whitman gives the following transitions: 791121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 792121098Swollman# but go with Shanks and assume they used Canadian rules. 7932742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 7942742Swollman# Apr 30 - Sep 24; go with Shanks. 7952742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 7962742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 7972742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 7982742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 79967578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 80067578Swollman# From Paul Eggert (2000-10-02): 80167578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 80267578Swollman# at 00:01 local time. For now, assume it started in 1987. 80367578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 80467578SwollmanRule StJohns 1987 max - Oct lastSun 0:01 0 S 80567578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 80667578SwollmanRule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D 8072742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 8082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8092742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 810121098Swollman -3:30:52 StJohns N%sT 1918 811121098Swollman -3:30:52 Canada N%sT 1919 81220094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 813121098Swollman -3:30 StJohns N%sT 1942 May 11 814121098Swollman -3:30 Canada N%sT 1946 8152742Swollman -3:30 StJohns N%sT 8162742Swollman 81767578Swollman# most of east Labrador 81817200Swollman 81920094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 82020094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 82120094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 822121098Swollman -3:30:52 - NST 1918 823121098Swollman -3:30:52 Canada N%sT 1919 82420094Swollman -3:30:52 - NST 1935 Mar 30 82520094Swollman -3:30 - NST 1936 826121098Swollman -3:30 StJohns N%sT 1942 May 11 827121098Swollman -3:30 Canada N%sT 1946 82820094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 82920094Swollman -4:00 StJohns A%sT 83020094Swollman 83120094Swollman 83220094Swollman# west Labrador, New Brunswick, Nova Scotia, Prince Edward I 83320094Swollman 83417200Swollman# From Paul Eggert (1996-06-12): 83517200Swollman# Shanks writes that since 1970 most of this region has been like Halifax. 83617200Swollman# Many locales did not observe peacetime DST until 1972; 83717200Swollman# Glace Bay, NS is the largest that we know of. 83817200Swollman# Shanks also writes that Liverpool, NS was the only town in Canada to observe 83917200Swollman# DST in 1971 but not 1970; for now we'll assume this is a typo. 84017200Swollman 84167578Swollman# From Paul Eggert (2000-10-02): 84267578Swollman# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches 84367578Swollman# at 00:01 local time. FIXME: verify and create a new Zone for this. 84467578Swollman 84567578Swollman 8462742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 8472742SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 8482742SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 8492742SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 8502742SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 8512742SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 8522742SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 8532742SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 8542742SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 8552742SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 8562742SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 8572742SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 8582742SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 8592742SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 8602742SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 8612742SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 8622742SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 8632742SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 8642742SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 8652742SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 8662742SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 867121098SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 8682742SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 8692742SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 8702742SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 8712742SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 8722742SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 8732742SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 8742742SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 8752742SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 8762742SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 8772742SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 8782742SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 8792742SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 880121098SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 881121098SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 882121098SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 883121098SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 884121098SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 885121098SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 886121098SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 887121098SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 8882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8892742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 890121098Swollman -4:00 Halifax A%sT 1918 891121098Swollman -4:00 Canada A%sT 1919 892121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 893121098Swollman -4:00 Canada A%sT 1946 894121098Swollman -4:00 Halifax A%sT 1974 895121098Swollman -4:00 Canada A%sT 89617200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 89717200Swollman -4:00 Canada A%sT 1953 89817200Swollman -4:00 Halifax A%sT 1954 89917200Swollman -4:00 - AST 1972 900121098Swollman -4:00 Halifax A%sT 1974 901121098Swollman -4:00 Canada A%sT 9022742Swollman 9038029Swollman 90417200Swollman# Ontario, Quebec 90517200Swollman 90617200Swollman# From Paul Eggert (1996-06-12): 907121098Swollman# Shanks writes that since 1970 most of Ontario has been like Toronto, 908121098Swollman# and most of Quebec has been like Montreal. 90917200Swollman# Thunder Bay skipped DST in 1973. 91017200Swollman# Many smaller locales did not observe peacetime DST until 1974; 91117200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 91217200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 91317200Swollman 914121098Swollman# From Mark Brader (2003-07-26): 915121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 916121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 917121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 918121098Swollman# have already done so. In Orillia DST was to run until Saturday, 919121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 920121098Swollman# hostility from certain segments of the public, and was revoked after 921121098Swollman# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 922121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 923121098Swollman# earlier in June). 924121098Swollman# 925121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 926121098Swollman 92743014Swollman# From Paul Eggert (1997-10-17): 928121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 92943014Swollman# says that Atikokan, Ontario currently does not observe DST, 93043014Swollman# but will vote on 11-10 whether to use EST/EDT. 93143014Swollman# He also writes that the 93243014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 93343014Swollman# Ontario Time Act (1990, Chapter T.9) 93443014Swollman# </a> 93543014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 93643014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 93743014Swollman# concerns a non-official time observed as a matter of local practice. 93858787Sru# For what it's worth, Shanks says that Atikokan has agreed with 93943014Swollman# Rainy River ever since standard time was introduced. 94043014Swollman 94167578Swollman# From Paul Eggert (2000-10-02): 94267578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 94367578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 94467578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 94567578Swollman# violation of the official Ontario rules. 94667578Swollman# They also write that Quebec east of the -63 meridian is supposed to 94767578Swollman# observe AST, but residents as far east as Natashquan use EST/EDT, 94867578Swollman# and residents east of Natashquan use AST. 94967578Swollman# We probably need Zones for far east Quebec and for Atikokan, 95067578Swollman# but we don't know when their practices started. 95167578Swollman 9522742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 9532742SwollmanRule Mont 1917 only - Mar 25 2:00 1:00 D 9542742SwollmanRule Mont 1917 only - Apr 24 0:00 0 S 9552742SwollmanRule Mont 1919 only - Mar 31 2:30 1:00 D 9562742SwollmanRule Mont 1919 only - Oct 25 2:30 0 S 9572742SwollmanRule Mont 1920 only - May 2 2:30 1:00 D 958121098SwollmanRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 9592742SwollmanRule Mont 1921 only - May 1 2:00 1:00 D 9602742SwollmanRule Mont 1922 only - Apr 30 2:00 1:00 D 9612742SwollmanRule Mont 1924 only - May 17 2:00 1:00 D 9622742SwollmanRule Mont 1924 1926 - Sep lastSun 2:30 0 S 9632742SwollmanRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 964136638Swollman# The 1927-to-1937 rules can be expressed more simply as 965136638Swollman# Rule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 966136638Swollman# Rule Mont 1927 1937 - Sep lastSat 24:00 0 S 967136638Swollman# The rules below avoid use of 24:00 968136638Swollman# (which pre-1998 versions of zic cannot handle). 969136638SwollmanRule Mont 1927 only - May 1 0:00 1:00 D 970136638SwollmanRule Mont 1927 1932 - Sep lastSun 0:00 0 S 971136638SwollmanRule Mont 1928 1931 - Apr lastSun 0:00 1:00 D 972136638SwollmanRule Mont 1932 only - May 1 0:00 1:00 D 973136638SwollmanRule Mont 1933 1940 - Apr lastSun 0:00 1:00 D 974136638SwollmanRule Mont 1933 only - Oct 1 0:00 0 S 975136638SwollmanRule Mont 1934 1939 - Sep lastSun 0:00 0 S 976121098SwollmanRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 9772742SwollmanRule Mont 1945 1948 - Sep lastSun 2:00 0 S 9782742SwollmanRule Mont 1949 1950 - Oct lastSun 2:00 0 S 9792742SwollmanRule Mont 1951 1956 - Sep lastSun 2:00 0 S 980121098SwollmanRule Mont 1957 1973 - Oct lastSun 2:00 0 S 981121098Swollman 982121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 983121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 984121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 985121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 986121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 987121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 988121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 989121098Swollman# Shanks says 1923-09-19; assume it's a typo and that "-16" was meant. 990121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 991121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 992136638Swollman# The 1927-to-1939 rules can be expressed more simply as 993136638Swollman# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S 994136638Swollman# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D 995136638Swollman# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D 996136638Swollman# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S 997136638Swollman# The rules below avoid use of Sun>=25 998136638Swollman# (which pre-2004 versions of zic cannot handle). 999136638SwollmanRule Toronto 1927 1932 - Sep lastSun 2:00 0 S 1000136638SwollmanRule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D 1001136638SwollmanRule Toronto 1932 only - May 1 2:00 1:00 D 1002136638SwollmanRule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D 1003136638SwollmanRule Toronto 1933 only - Oct 1 2:00 0 S 1004136638SwollmanRule Toronto 1934 1939 - Sep lastSun 2:00 0 S 1005121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 1006121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 1007121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 1008121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 1009121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 1010121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 1011121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 1012121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 1013121098Swollman# Shanks says Toronto ended DST a week early in 1971, namely on 1971-10-24, 1014121098Swollman# but Mark Brader wrote (2003-05-31) that he checked the 1971-10-30 issue 1015121098Swollman# of the Toronto Star, and it said that DST ended 1971-10-31 as usual. 1016121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 1017121098Swollman 1018121098Swollman# From Paul Eggert (2003-07-27): 1019121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 1020121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 1021121098Swollman# operation for the past three years, and in the City of Moose Jaw, 1022136638Swollman# Saskatchewan, for one year." 1023121098Swollman 1024136638Swollman# From David Bryan via Tory Tronrud, Director/Curator, 1025136638Swollman# Thunder Bay Museum (2003-11-12): 1026136638Swollman# There is some suggestion, however, that, by-law or not, daylight 1027136638Swollman# savings time was being practiced in Fort William and Port Arthur 1028136638Swollman# before 1909.... [I]n 1910, the line between the Eastern and Central 1029136638Swollman# Time Zones was permanently moved about two hundred miles west to 1030136638Swollman# include the Thunder Bay area.... When Canada adopted daylight 1031136638Swollman# savings time in 1916, Fort William and Port Arthur, having done so 1032136638Swollman# already, did not change their clocks.... During the Second World 1033136638Swollman# War,... [t]he cities agreed to implement DST during the summer 1034136638Swollman# months for the remainder of the war years. 1035136638Swollman 10362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10372742SwollmanZone America/Montreal -4:54:16 - LMT 1884 1038121098Swollman -5:00 Mont E%sT 1918 1039121098Swollman -5:00 Canada E%sT 1919 1040121098Swollman -5:00 Mont E%sT 1942 Feb 9 2:00s 1041121098Swollman -5:00 Canada E%sT 1946 1042121098Swollman -5:00 Mont E%sT 1974 1043121098Swollman -5:00 Canada E%sT 1044121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1045121098Swollman -5:00 Canada E%sT 1919 1046121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1047121098Swollman -5:00 Canada E%sT 1946 1048121098Swollman -5:00 Toronto E%sT 1974 1049121098Swollman -5:00 Canada E%sT 105017200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1051136638Swollman -6:00 - CST 1910 1052136638Swollman -5:00 - EST 1942 105317200Swollman -5:00 Canada E%sT 1970 105417200Swollman -5:00 Mont E%sT 1973 105517200Swollman -5:00 - EST 1974 105617200Swollman -5:00 Canada E%sT 105717200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1058121098Swollman -5:00 Canada E%sT 1940 Sep 29 1059121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 106017200Swollman -5:00 Canada E%sT 106117200SwollmanZone America/Rainy_River -6:17:56 - LMT 1895 1062121098Swollman -6:00 Canada C%sT 1940 Sep 29 1063121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 106417200Swollman -6:00 Canada C%sT 10652742Swollman 10668029Swollman 106717200Swollman# Manitoba 106819878Swollman 10692742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 10702742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 10712742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 10722742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 10732742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 10742742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 107514343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1076121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1077121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 10782742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 10792742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 10802742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 10812742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 108214343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 108314343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 108414343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 108514343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 108614343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 10872742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 10882742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 10892742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 109014343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 10912742SwollmanRule Winn 1966 1986 - Apr lastSun 2:00 1:00 D 109267578SwollmanRule Winn 1966 1986 - Oct lastSun 2:00 0 S 10932742SwollmanRule Winn 1987 max - Apr Sun>=1 2:00 1:00 D 109467578Swollman# From Paul Eggert (2000-10-02): 109567578Swollman# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from 109667578Swollman# DST at 03:00 local time. For now, assume it started in 1987. 109767578SwollmanRule Winn 1987 max - Oct lastSun 2:00s 0 S 10982742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10992742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 11002742Swollman -6:00 Winn C%sT 11012742Swollman 11028029Swollman 110317200Swollman# Saskatchewan 110417200Swollman 1105121098Swollman# From Mark Brader (2003-07-26): 1106121098Swollman# The first actual adoption of DST in Canada was at the municipal 1107121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1108121098Swollman# elsewhere have long been talking of legislation to save daylight, 1109121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1110121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1111121098Swollman# presumably late evening, as below), and would run until "the end of 1112121098Swollman# the summer". The discrepancy between municipal time and railroad 1113121098Swollman# time was noted. 1114121098Swollman 1115121098Swollman# From Paul Eggert (2003-07-27): 1116121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1117121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1118121098Swollman 111967578Swollman# From Paul Eggert (2000-10-02): 112017200Swollman# Shanks writes that since 1970 most of this region has been like Regina. 112117200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 112217200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 112367578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 112467578Swollman# are like Winnipeg, in violation of Saskatchewan law. 112517200Swollman 112619878Swollman# From W. Jones <jones@skdad.usask.ca> (1992-11-06): 112717200Swollman# The. . .below is based on information I got from our law library, the 112817200Swollman# provincial archives, and the provincial Community Services department. 112917200Swollman# A precise history would require digging through newspaper archives, and 113017200Swollman# since you didn't say what you wanted, I didn't bother. 113117200Swollman# 113217200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 113317200Swollman# the boundary became pretty ragged as communities near it reevaluated 113417200Swollman# their affiliations in one direction or the other. In 1965 a provincial 113517200Swollman# referendum favoured legislating common time practices. 113617200Swollman# 113717200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 113817200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 113917200Swollman# part of Saskatchewan would use CST year round, that districts in 114017200Swollman# northwest Saskatchewan would by default follow CST but could opt to 114117200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 114217200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 114317200Swollman# by default follow MT but could opt to follow CST. 114417200Swollman# 114517200Swollman# It took a few years for the dust to settle (I know one story of a town 114617200Swollman# on one time zone having its school in another, such that a mom had to 114717200Swollman# serve her family lunch in two shifts), but presently it seems that only 114817200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 114917200Swollman# rules any more; all other districts appear to have used CST year round 115017200Swollman# since sometime in the 1960s. 115117200Swollman 11522742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 11532742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 11542742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 11552742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 11562742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 11572742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 11582742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 11592742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 11602742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1161121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1162121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 11632742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 116417200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 116517200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1166121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1167121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1168121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 116917200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 117017200Swollman# 117117200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 117217200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 117317200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 117417200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 117517200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 11762742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 117717200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 117817200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 11792742Swollman -6:00 - CST 118017200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 118117200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 118217200Swollman -7:00 Regina M%sT 1950 118317200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 118417200Swollman -6:00 - CST 11852742Swollman 11868029Swollman 118717200Swollman# Alberta 118817200Swollman 11892742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 11902742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 11912742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 11922742SwollmanRule Edm 1919 only - May 27 2:00 0 S 11932742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 11942742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 11952742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1196121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1197121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 11982742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 11992742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 12002742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 12012742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 12022742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 12032742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 12042742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 12052742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 12062742SwollmanRule Edm 1972 max - Oct lastSun 2:00 0 S 12072742SwollmanRule Edm 1987 max - Apr Sun>=1 2:00 1:00 D 12082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12092742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 12102742Swollman -7:00 Edm M%sT 12112742Swollman 12128029Swollman 121317200Swollman# British Columbia 121417200Swollman 121567578Swollman# From Paul Eggert (2000-10-02): 121617200Swollman# Shanks writes that since 1970 most of this region has been like Vancouver. 121758787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 121867578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 121917200Swollman 12202742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 12212742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 12222742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 1223121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1224121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 12252742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 12262742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 12272742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 12282742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 12292742SwollmanRule Vanc 1962 max - Oct lastSun 2:00 0 S 12302742SwollmanRule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D 12312742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12322742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 12332742Swollman -8:00 Vanc P%sT 123417200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 123517200Swollman -8:00 Canada P%sT 1947 123617200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 123717200Swollman -7:00 - MST 12382742Swollman 12398029Swollman 124058787Sru# Northwest Territories, Nunavut, Yukon 124117200Swollman 124258787Sru# From Paul Eggert (1999-10-29): 124317200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 124420094Swollman# Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs: 124520094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 124620094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 124720094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 124820094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 124920094Swollman# * O.I.C. 1980/02 established DST. 125020094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 125120094Swollman# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander. 125217200Swollman 125358787Sru# From Rives McDow (1999-09-04): 125458787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 125558787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 125658787Sru# Nunavut moves to single time zone Oct. 31 125758787Sru# </a> 125858787Sru# 125958787Sru# From Antoine Leca (1999-09-06): 126058787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 126158787Sru# to differentiate it from the Yellowknife region. 126258787Sru 126358787Sru# From Paul Eggert (1999-09-20): 126458787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 126558787Sru# Basic Facts: The New Territory 126686222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 126758787Sru# and that Coral Harbour does not observe DST. We don't know when 126886222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 126958787Sru# We'll ignore the claim about Coral Harbour for now, 127058787Sru# since we have no further info. 127158787Sru 127258787Sru# From Rives McDow (1999-11-08): 127358787Sru# On October 31, when the rest of Nunavut went to Central time, 127458787Sru# Pangnirtung wobbled. Here is the result of their wobble: 127558787Sru# 127658787Sru# The following businesses and organizations in Pangnirtung use Central Time: 127758787Sru# 127858787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 127958787Sru# Eastern Arctic National Parks, A & D Specialist 128058787Sru# 128158787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 128258787Sru# 128358787Sru# Hamlet office, All other businesses, Both schools, Airport operator 128458787Sru# 128558787Sru# This has made for an interesting situation there, which warranted the news. 128658787Sru# No one there that I spoke with seems concerned, or has plans to 128758787Sru# change the local methods of keeping time, as it evidently does not 128858787Sru# really interfere with any activities or make things difficult locally. 128958787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 129058787Sru# so it appears that the situation will last at least that long. 129158787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 129258787Sru# their senses", but the locals evidently don't see any problem with 129358787Sru# the current state of affairs. 129458787Sru 129558787Sru# From Michaela Rodrigue, writing in the 129658787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 129758787Sru# Nunatsiaq News (1999-11-19)</a>: 129858787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 129958787Sru# central - or Nunavut time - for government offices, and eastern time 130058787Sru# for municipal offices and schools.... Igloolik [was similar but then] 130158787Sru# made the switch to central time on Saturday, Nov. 6. 130258787Sru 130367578Swollman# From Paul Eggert (2000-10-02): 130467578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 130567578Swollman# for these potential new Zones. 130675267Swollman# 130767578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 130867578Swollman# handful of residents at the Eureka weather station [in the Central 130967578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 131067578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 131167578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 131267578Swollman# Central Time and Southampton Island [in the Central zone] is not 131367578Swollman# required to use daylight savings. 131467578Swollman 131575267Swollman# From 131675267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 131775267Swollman# Nunavut now has two time zones 131875267Swollman# </a> (2000-11-10): 131975267Swollman# The Nunavut government would allow its employees in Kugluktuk and 132075267Swollman# Cambridge Bay to operate on central time year-round, putting them 132175267Swollman# one hour behind the rest of Nunavut for six months during the winter. 132275267Swollman# At the end of October the two communities had rebelled against 132375267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 132475267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 132575267Swollman# central time, while Kugluktuk, even farther west, reverted to 132675267Swollman# mountain time, which they had used before the advent of Nunavut's 132775267Swollman# unified time zone in 1999. 132875267Swollman# 132975267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 133075267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 133175267Swollman 133275267Swollman# From Paul Eggert (2000-12-04): 133375267Swollman# Let's just keep track of the official times for now. 133475267Swollman 133575267Swollman# From Rives McDow (2001-03-07): 133675267Swollman# The premier of Nunavut has issued a ministerial statement advising 133775267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 133875267Swollman# back to three time zones (mountain, central, and eastern). Of the 133975267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 134075267Swollman# has said it will not observe dst, staying on EST year round. I'm 134175267Swollman# checking for more info, and will get back to you if I come up with 134275267Swollman# more. 134375267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 134475267Swollman 13452742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 134617200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 134717200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 134817200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 134917200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 1350121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1351121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 135217200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 135317200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 135417200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 135517200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 135617200SwollmanRule NT_YK 1980 max - Oct lastSun 2:00 0 S 135717200SwollmanRule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D 13582742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 135917200SwollmanZone America/Pangnirtung -4:22:56 - LMT 1884 136058787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 136158787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 136275267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 136375267Swollman -5:00 Canada E%sT 136458787SruZone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 136558787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 136675267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 136775267Swollman -5:00 Canada E%sT 136875267SwollmanZone America/Rankin_Inlet -6:08:40 - LMT 1884 136975267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 137075267Swollman -5:00 - EST 2001 Apr 1 3:00 137158787Sru -6:00 Canada C%sT 137258787SruZone America/Cambridge_Bay -7:00:20 - LMT 1884 137358787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 137475267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 137575267Swollman -5:00 - EST 2000 Nov 5 0:00 137675267Swollman -6:00 - CST 2001 Apr 1 3:00 137775267Swollman -7:00 Canada M%sT 137817200SwollmanZone America/Yellowknife -7:37:24 - LMT 1884 137917200Swollman -7:00 NT_YK M%sT 138017200SwollmanZone America/Inuvik -8:54:00 - LMT 1884 138117200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 138217200Swollman -7:00 NT_YK M%sT 13832742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 138417200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 138517200Swollman -8:00 NT_YK P%sT 138617200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 138720094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 138817200Swollman -8:00 NT_YK P%sT 13892742Swollman 13908029Swollman 13912742Swollman############################################################################### 13922742Swollman 13932742Swollman# Mexico 13942742Swollman 139575267Swollman# From Paul Eggert (2001-03-05): 139675267Swollman# The Investigation and Analysis Service of the 139775267Swollman# Mexican Library of Congress (MLoC) has published a 139875267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 139975267Swollman# history of Mexican local time (in Spanish) 140075267Swollman# </a>. 14012742Swollman# 140275267Swollman# Here are the discrepancies between Shanks and the MLoC. 140375267Swollman# (In all cases we go with the MLoC.) 140475267Swollman# Shanks reports that Baja was at -8:00 in 1922/1923. 140575267Swollman# Shanks says the 1930 transition in Baja was 1930-11-16. 140675267Swollman# Shanks reports no DST during summer 1931. 140775267Swollman# Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01. 140875267Swollman# Shanks does not report transitions for Baja in 1945 or 1948. 140975267Swollman# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23. 141075267Swollman# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00 141175267Swollman# on 1997-10-26 at 02:00. 14122742Swollman 141375267Swollman# From Gwillim Law (2001-02-20): 141475267Swollman# There are some other discrepancies between the Decrees page and the 141575267Swollman# tz database. I think they can best be explained by supposing that 141675267Swollman# the researchers who prepared the Decrees page failed to find some of 141775267Swollman# the relevant documents. 141875267Swollman 141964499Swollman# From Paul Eggert (2000-07-26): 142064499Swollman# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 142164499Swollman# and 1988 DST experiments. Go with spin.com.mx. 14222742Swollman 142317200Swollman# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15): 142417200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 142517200Swollman# outlining the timezone changes in Mexico. 142658787Sru# 142717200Swollman# ------------- Begin Forwarded Message ------------- 142858787Sru# 142917200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 143017200Swollman# rules for the DST changes. The rules are: 143158787Sru# 143217200Swollman# 1. The country is divided in 3 timezones: 143317200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 143417200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 143517200Swollman# - The rest of the country (the Mexico/General TZ) 143658787Sru# 143717200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 143817200Swollman# at 2:00 AM, the times in each zone are as follows: 143917200Swollman# BajaNorte: GMT+7 144017200Swollman# BajaSur: GMT+6 144117200Swollman# General: GMT+5 144258787Sru# 144317200Swollman# 3. The rest of the year, the times are as follows: 144417200Swollman# BajaNorte: GMT+8 144517200Swollman# BajaSur: GMT+7 144617200Swollman# General: GMT+6 144758787Sru# 144817200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 144958787Sru# 145017200Swollman# -------------- End Forwarded Message -------------- 145117200Swollman# From Paul Eggert (1996-06-12): 145243014Swollman# For an English translation of the decree, see 145343014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 145443014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 145543014Swollman# </a> 145614343Swollman 145743543Swollman# From Rives McDow (1998-10-08): 145843543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 145943543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 146043543Swollman 146158787Sru# From Rives McDow (2000-01-10): 146258787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 146358787Sru# zone 5 hours from the International Date Line, and will not observe daylight 146458787Sru# savings time so as to stay on the same time zone as the southern part of 146558787Sru# Arizona year round. 146658787Sru 146775267Swollman# From Jesper Norgaard, translating 146875267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 146975267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 147075267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 147175267Swollman# year, so that the more than 10,000 schools work at normal hour the 147275267Swollman# whole year. 147375267Swollman 147475267Swollman# From Gwillim Law (2001-01-19): 147575267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 147675267Swollman# (translated):... 147775267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 147875267Swollman# that Summer Time will be reduced from seven to five months, starting 147975267Swollman# this year.... 148075267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 148175267Swollman# [translated], says "summer time will ... take effect on the first Sunday 148275267Swollman# in May, and end on the last Sunday of September. 148375267Swollman 148475267Swollman# From Arthur David Olson (2001-01-25): 148575267Swollman# The 2001-01-24 traditional Washington Post contained the page one 148675267Swollman# story "Timely Issue Divides Mexicans."... 148775267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 148875267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 148975267Swollman# Mexico City and its 20 million residents on a different time than 149075267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 149175267Swollman# observation of Daylight Saving Time. 149275267Swollman 149375267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 149475267Swollman# Official statute published by the Energy Department 149575267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 149675267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 149775267Swollman 149875267Swollman# From Paul Eggert (2001-03-03): 149975267Swollman# 150075267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 150175267Swollman# James F. Smith writes in today's LA Times 150275267Swollman# </a> 150375267Swollman# * Sonora will continue to observe standard time. 150475267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 150575267Swollman# the Federal District will not adopt DST. 150675267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 150775267Swollman# * The decree does not affect federal-controlled facilities including 150875267Swollman# the airport, banks, hospitals, and schools. 150975267Swollman# 151075267Swollman# For now we'll assume that the Federal District will bow to federal rules. 151175267Swollman 151275267Swollman# From Jesper Norgaard (2001-04-01): 151375267Swollman# I found some references to the Mexican application of daylight 151475267Swollman# saving, which modifies what I had already sent you, stating earlier 151575267Swollman# that a number of northern Mexican states would go on daylight 151675267Swollman# saving. The modification reverts this to only cover Baja California 151775267Swollman# (Norte), while all other states (except Sonora, who has no daylight 151875267Swollman# saving all year) will follow the original decree of president 151975267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 152075267Swollman# September 30, 2001. 152175267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 152275267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 152375267Swollman 152486222Swollman# From Reuters (2001-09-04): 152586222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 152686222Swollman# unconstitutional in Mexico City, creating the possibility the 152786222Swollman# capital will be in a different time zone from the rest of the nation 152886222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 152986222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 153086222Swollman# standard time. "This is so residents of the Federal District are not 153186222Swollman# subject to unexpected time changes," a statement from the court said. 153286222Swollman 153393799Swollman# From Jesper Norgaard Welen (2002-03-12): 153493799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 153593799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 153693799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 153793799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 153893799Swollman 15392742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15402742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 15412742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 15422742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 15432742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 1544121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 15452742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 15462742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 15472742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 154875267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 154975267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 155093799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 155193799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 155293799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 155393799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 15542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 155543014Swollman# Quintana Roo 155658787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 155775267Swollman -6:00 - CST 1981 Dec 23 155843543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 155943543Swollman -6:00 Mexico C%sT 156064499Swollman# Campeche, Yucatan 156164499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 156275267Swollman -6:00 - CST 1981 Dec 23 156364499Swollman -5:00 - EST 1982 Dec 2 156464499Swollman -6:00 Mexico C%sT 156564499Swollman# Coahuila, Durango, Nuevo Leon, Tamaulipas 156675267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 156764499Swollman -6:00 - CST 1988 156864499Swollman -6:00 US C%sT 1989 156964499Swollman -6:00 Mexico C%sT 157043014Swollman# Central Mexico 15712742SwollmanZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 15722742Swollman -7:00 - MST 1927 Jun 10 23:00 15732742Swollman -6:00 - CST 1930 Nov 15 15742742Swollman -7:00 - MST 1931 May 1 23:00 15752742Swollman -6:00 - CST 1931 Oct 157675267Swollman -7:00 - MST 1932 Apr 1 157786222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 157893799Swollman -6:00 - CST 2002 Feb 20 157993799Swollman -6:00 Mexico C%sT 158043014Swollman# Chihuahua 158158787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 158243014Swollman -7:00 - MST 1927 Jun 10 23:00 158343014Swollman -6:00 - CST 1930 Nov 15 158443014Swollman -7:00 - MST 1931 May 1 23:00 158543014Swollman -6:00 - CST 1931 Oct 158675267Swollman -7:00 - MST 1932 Apr 1 158743014Swollman -6:00 - CST 1996 158843014Swollman -6:00 Mexico C%sT 1998 158943014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 159043014Swollman -7:00 Mexico M%sT 159158787Sru# Sonora 159258787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 159358787Sru -7:00 - MST 1927 Jun 10 23:00 159458787Sru -6:00 - CST 1930 Nov 15 159558787Sru -7:00 - MST 1931 May 1 23:00 159658787Sru -6:00 - CST 1931 Oct 159775267Swollman -7:00 - MST 1932 Apr 1 159864499Swollman -6:00 - CST 1942 Apr 24 159958787Sru -7:00 - MST 1949 Jan 14 160058787Sru -8:00 - PST 1970 160158787Sru -7:00 Mexico M%sT 1999 160258787Sru -7:00 - MST 160364499Swollman# Baja California Sur, Nayarit, Sinaloa 16042742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 16052742Swollman -7:00 - MST 1927 Jun 10 23:00 16062742Swollman -6:00 - CST 1930 Nov 15 16072742Swollman -7:00 - MST 1931 May 1 23:00 16082742Swollman -6:00 - CST 1931 Oct 160975267Swollman -7:00 - MST 1932 Apr 1 161064499Swollman -6:00 - CST 1942 Apr 24 16112742Swollman -7:00 - MST 1949 Jan 14 16122742Swollman -8:00 - PST 1970 161314343Swollman -7:00 Mexico M%sT 161458787Sru# Baja California 16152742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 161675267Swollman -7:00 - MST 1924 16172742Swollman -8:00 - PST 1927 Jun 10 23:00 161875267Swollman -7:00 - MST 1930 Nov 15 161975267Swollman -8:00 - PST 1931 Apr 1 162075267Swollman -8:00 1:00 PDT 1931 Sep 30 162164499Swollman -8:00 - PST 1942 Apr 24 162275267Swollman -8:00 1:00 PWT 1945 Nov 12 162375267Swollman -8:00 - PST 1948 Apr 5 162475267Swollman -8:00 1:00 PDT 1949 Jan 14 162575267Swollman -8:00 - PST 1954 162675267Swollman -8:00 CA P%sT 1961 162775267Swollman -8:00 - PST 1976 162814343Swollman -8:00 US P%sT 1996 162975267Swollman -8:00 Mexico P%sT 2001 163093799Swollman -8:00 US P%sT 2002 Feb 20 163193799Swollman -8:00 Mexico P%sT 163275267Swollman# From Paul Eggert (2001-03-05): 163375267Swollman# Formerly there was an America/Ensenada zone, which differed from 163475267Swollman# America/Tijuana only in that it did not observe DST from 1976 163575267Swollman# through 1995. This was as per Shanks. However, Guy Harris reports 163675267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 163775267Swollman# Tijuana observe DST," which contradicts Shanks but does imply that 163875267Swollman# DST-observance was a town-by-town matter back then. This concerns 163975267Swollman# data after 1970 so most likely there should be at least one Zone 164075267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 164175267Swollman# name or contents should be. 16422742Swollman# 16432742Swollman# Revillagigedo Is 16442742Swollman# no information 16452742Swollman 16462742Swollman############################################################################### 16472742Swollman 16482742Swollman# Anguilla 16492742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16502742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 16512742Swollman -4:00 - AST 16522742Swollman 16532742Swollman# Antigua and Barbuda 16542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16552742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 16562742Swollman -5:00 - EST 1951 16572742Swollman -4:00 - AST 16582742Swollman 16592742Swollman# Bahamas 16602742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16612742SwollmanRule Bahamas 1964 max - Oct lastSun 2:00 0 S 16622742SwollmanRule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D 16632742SwollmanRule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D 16642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16652742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 16662742Swollman -5:00 Bahamas E%sT 16672742Swollman 16682742Swollman# Barbados 16692742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16702742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 16712742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 16722742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 16732742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 16742742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 16752742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16762742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 167743014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 16782742Swollman -4:00 Barb A%sT 16792742Swollman 16802742Swollman# Belize 16812742Swollman# Whitman entirely disagrees with Shanks; go with Shanks. 16822742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16832742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 16842742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 16852742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 16862742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 16872742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 16882742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 16892742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16902742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 16912742Swollman -6:00 Belize C%sT 16922742Swollman 16932742Swollman# Bermuda 16942742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16952742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 16962742Swollman -4:00 - AST 1974 Apr 28 2:00 16972742Swollman -4:00 Bahamas A%sT 16982742Swollman 16992742Swollman# Cayman Is 17002742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17012742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 170243014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 17032742Swollman -5:00 - EST 17042742Swollman 17052742Swollman# Costa Rica 17062742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17072742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 17082742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 170920094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 171020094Swollman# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks. 171120094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 171220094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 17132742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 17142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17152742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 171658787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 17172742Swollman -6:00 CR C%sT 17182742Swollman# Coco 17192742Swollman# no information; probably like America/Costa_Rica 17202742Swollman 17212742Swollman# Cuba 17222742Swollman 172358787Sru# From Arthur David Olson (1999-03-29): 172458787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 172558787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 172658787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 172758787Sru# During the game, play-by-play announcer Jim Hunter noted that 172858787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 172958787Sru# Time today." (The "two hour" remark referred to losing one hour of 173058787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 173158787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 173258787Sru# returned to Baltimore, which switches on that date.) 17332742Swollman 1734138323Swollman# From Evert van der Veer via Steffen Thorsen (2004-10-28): 1735138323Swollman# Cuba is not going back to standard time this year. 1736138323Swollman# From Paul Eggert (2004-10-28): 1737138323Swollman# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html 1738138323Swollman# says that it's due to a problem at the Antonio Guiteras 1739138323Swollman# thermoelectric plant, and says "This October there will be no return 1740138323Swollman# to normal hours (after daylight saving time)". 1741138323Swollman# For now, let's assume that it's a one-year temporary measure. 1742138323Swollman 17432742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17442742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 17452742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 17462742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 17472742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 17482742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 17492742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 17502742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 17512742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 17522742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 17532742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 17542742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 17552742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 17562742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 17572742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 17582742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 17592742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 17602742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 17612742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 176230711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 17632742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 17642742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 17652742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 176643014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 176720094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 176843014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 176943014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 177058787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 1771138323SwollmanRule Cuba 1998 2003 - Oct lastSun 0:00s 0 S 177258787SruRule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D 1773138323SwollmanRule Cuba 2005 max - Oct lastSun 0:00s 0 S 17742742Swollman 17752742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17762742SwollmanZone America/Havana -5:29:28 - LMT 1890 177758787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 17782742Swollman -5:00 Cuba C%sT 17792742Swollman 17802742Swollman# Dominica 17812742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17822742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 17832742Swollman -4:00 - AST 17842742Swollman 17852742Swollman# Dominican Republic 178675267Swollman 178775267Swollman# From Steffen Thorsen (2000-10-30): 178875267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 178975267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 179075267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 179175267Swollman 179275267Swollman# From Paul Eggert (2000-12-04): 179375267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 179475267Swollman 179575267Swollman# From Rives McDow (2000-12-01): 179675267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 179775267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 179875267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 179975267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 180075267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 180175267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 180275267Swollman# decided to revert. 180375267Swollman 180475267Swollman 18052742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18062742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 18072742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 18082742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 18092742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 18102742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 18112742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 18122742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18132742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 18142742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 18152742Swollman -5:00 DR E%sT 1974 Oct 27 181675267Swollman -4:00 - AST 2000 Oct 29 02:00 181775267Swollman -5:00 US E%sT 2000 Dec 3 01:00 18182742Swollman -4:00 - AST 18192742Swollman 18202742Swollman# El Salvador 18212742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18222742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 18232742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 1824121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 1825121098Swollman# instead of America/San_Salvador. 18262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18272742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 18282742Swollman -6:00 Salv C%sT 18292742Swollman 18302742Swollman# Grenada 18312742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 183219878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 18332742Swollman -4:00 - AST 18342742Swollman 18352742Swollman# Guadeloupe 18362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18372742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 18382742Swollman -4:00 - AST 18392742Swollman 18402742Swollman# Guatemala 18412742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18422742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 18432742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 18442742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 18452742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 184620094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 184720094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 18482742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18492742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 18502742Swollman -6:00 Guat C%sT 18512742Swollman 18522742Swollman# Haiti 18532742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18542742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 18552742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 18562742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 185758787Sru# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA. 185843014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 185943014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 18602742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18612742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 18622742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 18632742Swollman -5:00 Haiti E%sT 18642742Swollman 18652742Swollman# Honduras 18662742Swollman# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1. 18672742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18682742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 18692742Swollman -6:00 Salv C%sT 187043543Swollman# 187143543Swollman# Great Swan I ceded by US to Honduras in 1972 18722742Swollman 18732742Swollman# Jamaica 18742742Swollman 187519878Swollman# From Bob Devine (1988-01-28): 18762742Swollman# Follows US rules. 18772742Swollman 187819878Swollman# From U. S. Naval Observatory (1989-01-19): 18792742Swollman# JAMAICA 5 H BEHIND UTC 18802742Swollman 188158787Sru# From Shanks: 18822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18832742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 188443014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 188558787Sru -5:00 - EST 1974 Apr 28 2:00 188620094Swollman -5:00 US E%sT 1984 188720094Swollman -5:00 - EST 18882742Swollman 18892742Swollman# Martinique 18902742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18912742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 189286222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 18932742Swollman -4:00 - AST 1980 Apr 6 18942742Swollman -4:00 1:00 ADT 1980 Sep 28 18952742Swollman -4:00 - AST 18962742Swollman 18972742Swollman# Montserrat 189830711Swollman# From Paul Eggert (1997-08-31): 189930711Swollman# Recent volcanic eruptions have forced evacuation of Plymouth, the capital. 190030711Swollman# Luckily, Olveston, the current de facto capital, has the same longitude. 19012742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 190230711SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston 19032742Swollman -4:00 - AST 19042742Swollman 19052742Swollman# Nicaragua 190643543Swollman# 190743543Swollman# From Steffen Thorsen (1998-12-29): 190843543Swollman# Nicaragua seems to be back at -6:00 but I have not been able to find when 190943543Swollman# they changed from -5:00. 191043543Swollman# 19112742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 19122742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 19132742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 191420094SwollmanRule Nic 1992 only - Jan 1 4:00 1:00 D 191520094SwollmanRule Nic 1992 only - Sep 24 0:00 0 S 19162742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19172742SwollmanZone America/Managua -5:45:08 - LMT 1890 191886222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 19192742Swollman -6:00 - CST 1973 May 19202742Swollman -5:00 - EST 1975 Feb 16 192120094Swollman -6:00 Nic C%sT 1993 Jan 1 4:00 192243543Swollman -5:00 - EST 1998 Dec 192343543Swollman -6:00 - CST 19242742Swollman 19252742Swollman# Panama 19262742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19272742SwollmanZone America/Panama -5:18:08 - LMT 1890 192886222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 19292742Swollman -5:00 - EST 19302742Swollman 19312742Swollman# Puerto Rico 19322742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 19332742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 193414343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 19352742Swollman -4:00 - AST 1942 May 3 193614343Swollman -4:00 1:00 AWT 1945 Sep 30 2:00 19372742Swollman -4:00 - AST 19382742Swollman 19392742Swollman# St Kitts-Nevis 19402742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19412742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 19422742Swollman -4:00 - AST 19432742Swollman 19442742Swollman# St Lucia 19452742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19462742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 194786222Swollman -4:04:00 - CMT 1912 # Castries Mean Time 19482742Swollman -4:00 - AST 19492742Swollman 19502742Swollman# St Pierre and Miquelon 19512742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 19522742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19532742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 19542742Swollman -4:00 - AST 1980 May 1955121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 1956121098Swollman -3:00 Canada PM%sT 19572742Swollman 19582742Swollman# St Vincent and the Grenadines 19592742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19602742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 196143014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 19622742Swollman -4:00 - AST 19632742Swollman 19642742Swollman# Turks and Caicos 196543014Swollman# From Paul Eggert (1998-08-06): 196643014Swollman# Shanks says they use US DST rules, but IATA SSIM (1991/1998) 196720094Swollman# says they switch at midnight. Go with IATA SSIM. 196820094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 196920094SwollmanRule TC 1979 1986 - Apr lastSun 0:00 1:00 D 197020094SwollmanRule TC 1979 max - Oct lastSun 0:00 0 S 197120094SwollmanRule TC 1987 max - Apr Sun>=1 0:00 1:00 D 19722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19732742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 197443014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 197520094Swollman -5:00 TC E%sT 19768029Swollman 197714343Swollman# British Virgin Is 19782742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 197914343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 19802742Swollman -4:00 - AST 19818029Swollman 198214343Swollman# Virgin Is 198314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 198414343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 198514343Swollman -4:00 - AST 1986