northamerica revision 121098
1121098Swollman# @(#)northamerica 7.63 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# 19614343Swollman# From Paul Eggert (1995-12-19): 19714343Swollman# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions. 19814343Swollman# Go with Shanks. 19975267Swollman# 20075267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 20175267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 20275267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 20375267Swollman# See the file "australasia". 2042742Swollman 20586464Swollman 20686222Swollman# US eastern time, represented by New York 20775267Swollman 20867578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 209114173Swollman# Georgia, southeast Indiana (Clark, Dearborn, Floyd, Harrison, and 210114173Swollman# Ohio counties), eastern Kentucky, Maine, Maryland, Massachusetts, 211114173Swollman# New Hampshire, New Jersey, New York, North Carolina, Ohio, 212114173Swollman# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, 213114173Swollman# Vermont, Virginia, West Virginia 21467578Swollman 21514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 21614343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 21714343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 21814343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 21914343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 22014343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 22114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 22214343SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00 22314343Swollman -5:00 US E%sT 1920 22414343Swollman -5:00 NYC E%sT 1942 22514343Swollman -5:00 US E%sT 1946 22614343Swollman -5:00 NYC E%sT 1967 22714343Swollman -5:00 US E%sT 2282742Swollman 22986222Swollman# US central time, represented by Chicago 23067578Swollman 23167578Swollman# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana 232114173Swollman# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, 233114173Swollman# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western 234114173Swollman# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern 235114173Swollman# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, 236114173Swollman# western Tennessee, most of Texas, Wisconsin 23767578Swollman 23814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 23914343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 24014343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 24114343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 24214343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 24314343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 24414343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 24514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 24614343SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 24714343Swollman -6:00 US C%sT 1920 24814343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 24914343Swollman -5:00 - EST 1936 Nov 15 2:00 25014343Swollman -6:00 Chicago C%sT 1942 25114343Swollman -6:00 US C%sT 1946 25214343Swollman -6:00 Chicago C%sT 1967 25314343Swollman -6:00 US C%sT 25486222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 25586222SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:00 25686222Swollman -7:00 US M%sT 1992 Oct 25 02:00 25786222Swollman -6:00 US C%sT 2582742Swollman 25986222Swollman# US mountain time, represented by Denver 26067578Swollman# 26167578Swollman# Colorado, southern Idaho, far western Kansas, Montana, western 26286222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 26386222Swollman# New Mexico, southwestern North Dakota, far eastern Oregon, 26475267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 26575267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 26667578Swollman# 26714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 26814343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 26914343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 27014343SwollmanRule Denver 1921 only - May 22 2:00 0 S 27114343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 27214343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 2732742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27414343SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00 27515309Swollman -7:00 US M%sT 1920 27615309Swollman -7:00 Denver M%sT 1942 27715309Swollman -7:00 US M%sT 1946 27815309Swollman -7:00 Denver M%sT 1967 27915309Swollman -7:00 US M%sT 2802742Swollman 28114343Swollman# US Pacific time, represented by Los Angeles 28267578Swollman# 28386222Swollman# California, northern Idaho, 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 32214343Swollman -9:00 US AK%sT 32375267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 32475267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 32514343Swollman -9:00 - YST 1942 32614343Swollman -9:00 US Y%sT 1946 32714343Swollman -9:00 - YST 1969 32814343Swollman -9:00 US Y%sT 1983 Oct 30 2:00 32914343Swollman -9:00 US AK%sT 33075267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 33175267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 33214343Swollman -10:00 - CAT 1942 33314343Swollman -10:00 US CAT/CAWT 1946 33414343Swollman -10:00 - CAT 1967 Apr 33514343Swollman -10:00 - AHST 1969 33614343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 33714343Swollman -9:00 US AK%sT 33875267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 33975267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 34014343Swollman -11:00 - NST 1942 34114343Swollman -11:00 US N%sT 1946 34214343Swollman -11:00 - NST 1967 Apr 34314343Swollman -11:00 - BST 1969 34414343Swollman -11:00 US B%sT 1983 Oct 30 2:00 34514343Swollman -9:00 US AK%sT 34675267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 34775267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 34814343Swollman -11:00 - NST 1942 34914343Swollman -11:00 US N%sT 1946 35014343Swollman -11:00 - NST 1967 Apr 35114343Swollman -11:00 - BST 1969 35214343Swollman -11:00 US B%sT 1983 Oct 30 2:00 35314343Swollman -10:00 US HA%sT 35414343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 35514343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 35614343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 35714343Swollman# These switches don't quite make our 1970 cutoff. 3582742Swollman 35914343Swollman# Hawaii 36014343Swollman# 36114343Swollman# From Arthur David Olson: 36214343Swollman# And then there's Hawaii. 36314343Swollman# DST was observed for one day in 1933; 36414343Swollman# standard time was changed by half an hour in 1947; 36514343Swollman# it's always standard as of 1986. 36614343Swollman# 36714343Swollman# From Paul Eggert: 36814343Swollman# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 36914343Swollman# 37014343SwollmanZone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 37114343Swollman -10:30 - HST 1933 Apr 30 2:00 37214343Swollman -10:30 1:00 HDT 1933 May 21 2:00 37314343Swollman -10:30 US H%sT 1947 Jun 8 2:00 37414343Swollman -10:00 - HST 3752742Swollman 37614343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 37714343Swollman 37814343Swollman# Arizona mostly uses MST. 379114173Swollman 380114173Swollman# From Paul Eggert (2002-10-20): 381114173Swollman# 382114173Swollman# The information in the rest of this paragraph is derived from the 383114173Swollman# <a href="http://www.dlapr.lib.az.us/links/daylight.htm"> 384114173Swollman# Daylight Saving Time web page (2002-01-23)</a> maintained by the 385114173Swollman# Arizona State Library, Archives and Public Records. 386114173Swollman# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard 387114173Swollman# time, but by federal law railroads, airlines, bus lines, military 388114173Swollman# personnel, and some engaged in interstate commerce continued to 389114173Swollman# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix 390114173Swollman# Gazette says that was the date the law changed, and that 04-01 was 391114173Swollman# the date the state's clocks would change. In 1945 the State of 392114173Swollman# Arizona used standard time all year, again with exceptions only as 393114173Swollman# mandated by federal law. Arizona observed DST in 1967, but Arizona 394114173Swollman# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. 395114173Swollman# 396114173Swollman# Shanks says the 1944 experiment came to an end on 1944-03-17. 397114173Swollman# Go with the Arizona State Library instead. 398114173Swollman 39914343SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00 40014343Swollman -7:00 US M%sT 1944 Jan 1 00:01 401114173Swollman -7:00 - MST 1944 Apr 1 00:01 40214343Swollman -7:00 US M%sT 1944 Oct 1 00:01 40314343Swollman -7:00 - MST 1967 404114173Swollman -7:00 US M%sT 1968 Mar 21 40514343Swollman -7:00 - MST 40619878Swollman# From Arthur David Olson (1988-02-13): 40714343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 4082742Swollman# notes in private correspondence dated 12/28/87 that "Presently, only the 4092742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 4102742Swollman# large size and location in three states." (The "only" means that other 4112742Swollman# tribal nations don't use DST.) 4122742Swollman 41314343SwollmanLink America/Denver America/Shiprock 4142742Swollman 41514343Swollman# Southern Idaho and eastern Oregon switched four weeks late in 1974. 41614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 41714343SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 41814343Swollman -8:00 US P%sT 1923 May 13 2:00 41914343Swollman -7:00 US M%sT 1974 42014343Swollman -7:00 - MST 1974 Feb 3 2:00 42114343Swollman -7:00 US M%sT 4222742Swollman 42314343Swollman# Indiana 42414343Swollman# 42558787Sru# For a map of Indiana's time zone regions, see: 42658787Sru# <a href="http://www.mccsc.edu/time.html"> 42758787Sru# What time is it in Indiana? 42858787Sru# </a> (1999-04-06) 42958787Sru# 43014343Swollman# From Paul Eggert (1995-12-19): 43114343Swollman# Indiana generally observes either EST all year, or CST/CDT, 43214343Swollman# but areas near Cincinnati and Louisville use those cities' timekeeping 43314343Swollman# and in 1969 and 1970 the whole state observed daylight time; 43414343Swollman# and there are other exceptions as noted below. 43514343Swollman# Shanks partitions Indiana into 345 regions, each with its own time history, 43614343Swollman# and writes ``Even newspaper reports present contradictory information.'' 43714343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 43814343Swollman# 43914343Swollman# Since 1970, EST-only Indiana has been like America/Indianapolis, 44014343Swollman# with exceptions noted below for Crawford, Starke, and Switzerland counties. 44114343Swollman# The parts of Indiana not listed below have been like America/Chicago, 44214343Swollman# America/Louisville, or America/New_York. 44314343Swollman# 44414343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 44514343Swollman# that they would be ambiguous if we left them at the `America' level. 44614343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 44714343Swollman# 44814343Swollman# Most of EST-only Indiana last observed DST in 1970. 44975267Swollman 45075267Swollman# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn: 45175267Swollman# Pam Belluck reported in the New York Times (2001-01-31) that the 45275267Swollman# Indiana Legislature is considering a bill to adopt DST statewide. 45375267Swollman# Her article mentioned Vevay, whose post office observes a different 45486222Swollman# time zone from Danner's Hardware across the street. 45575267Swollman 45614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 45714343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 45814343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 45914343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 46014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 46114343SwollmanZone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00 46214343Swollman -6:00 US C%sT 1920 46314343Swollman -6:00 Indianapolis C%sT 1942 46414343Swollman -6:00 US C%sT 1946 46514343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 46614343Swollman -5:00 - EST 1957 Sep 29 2:00 46714343Swollman -6:00 - CST 1958 Apr 27 2:00 46814343Swollman -5:00 - EST 1969 46914343Swollman -5:00 US E%sT 1971 47014343Swollman -5:00 - EST 47114343SwollmanLink America/Indianapolis America/Indiana/Indianapolis 4722742Swollman# 47314343Swollman# Part of Crawford County, Indiana, last observed DST in 1975, 47414343Swollman# and left its clocks alone in 1974. 47514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 47614343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 47714343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 47814343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 47914343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 48014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 48114343SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00 48214343Swollman -6:00 US C%sT 1951 48314343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 48414343Swollman -5:00 - EST 1969 48514343Swollman -5:00 US E%sT 1974 Jan 6 2:00 48614343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 48714343Swollman -5:00 US E%sT 1976 48814343Swollman -5:00 - EST 48914343Swollman# 49014343Swollman# Starke County, Indiana 49119878Swollman# From Arthur David Olson (1991-10-28): 49219878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 49314343Swollman# notes that Starke County switched from Central time to Eastern time as of 49419878Swollman# 1991-10-27. 49514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 49614343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 49714343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 49814343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 49914343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 50014343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 50114343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 50214343SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00 50314343Swollman -6:00 US C%sT 1947 50414343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 50514343Swollman -5:00 - EST 1963 Oct 27 2:00 50614343Swollman -6:00 US C%sT 1991 Oct 27 2:00 50714343Swollman -5:00 - EST 50814343Swollman# 50914343Swollman# Switzerland County, Indiana, last observed DST in 1972. 51014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 51114343SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00 51214343Swollman -6:00 US C%sT 1954 Apr 25 2:00 51314343Swollman -5:00 - EST 1969 51414343Swollman -5:00 US E%sT 1973 51514343Swollman -5:00 - EST 5162742Swollman 51714343Swollman# Part of Kentucky left its clocks alone in 1974. 51867578Swollman# This also includes a part of Indiana immediately adjacent to Louisville. 51914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 52014343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 52114343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 52214343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 52314343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 52414343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 52514343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 52614343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 52714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 52814343SwollmanZone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 52914343Swollman -6:00 US C%sT 1921 53014343Swollman -6:00 Louisville C%sT 1942 53114343Swollman -6:00 US C%sT 1946 53214343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 53314343Swollman -5:00 - EST 1968 53414343Swollman -5:00 US E%sT 1974 Jan 6 2:00 53514343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 53614343Swollman -5:00 US E%sT 53767578SwollmanLink America/Louisville America/Kentucky/Louisville 53867578Swollman# 53958787Sru# Wayne, Clinton, and Russell Counties, Kentucky 54058787Sru# 54158787Sru# From 54258787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 54358787Sru# Lake Cumberland LIFE 54458787Sru# </a> (1999-01-29) via WKYM-101.7: 54558787Sru# Clinton County has joined Wayne County in asking the DoT to change from 54658787Sru# the Central to the Eastern time zone.... The Wayne County government made 54758787Sru# the same request in December. And while Russell County officials have not 54858787Sru# taken action, the majority of respondents to a poll conducted there in 54958787Sru# August indicated they would like to change to "fast time" also. 55058787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 55158787Sru# location in the Central time zone. 55267578Swollman# 55367578Swollman# From Rich Wales (2000-08-29): 55467578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 55567578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 55675267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 55775267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 55886222Swollman# 55986222Swollman# From Paul Eggert (2001-07-16): 56086222Swollman# The final rule was published in the 56186222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 56286222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 56386222Swollman# </a> 564114173Swollman# 56567578SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 56667578Swollman -6:00 US C%sT 1946 56767578Swollman -6:00 - CST 1968 56867578Swollman -6:00 US C%sT 2000 Oct 29 2:00 56967578Swollman -5:00 US E%sT 5702742Swollman 57167578Swollman 57267578Swollman# From Rives McDow (2000-08-30): 57367578Swollman# Here ... are all the changes in the US since 1985. 57467578Swollman# Kearny County, KS (put all of county on central; 57567578Swollman# previously split between MST and CST) ... 1990-10 57667578Swollman# Starke County, IN (from CST to EST) ... 1991-10 57767578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 57867578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 57967578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 58067578Swollman# 58186222Swollman# From Paul Eggert (2001-07-17): 58286222Swollman# We don't know where the line used to be within Kearny County, KS, 58386222Swollman# so omit that change for now. 58486222Swollman# See America/Indiana/Knox for the Starke County, IN change. 58586222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 58686222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 58786222Swollman# 1999-10-31. See the 58886222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 58986222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 59086222Swollman# </a> 59186222Swollman# However, the Federal Register says that West Wendover already operated 59286222Swollman# on mountain time, and the rule merely made this official; 59386222Swollman# hence a separate tz entry is not needed. 59467578Swollman 59514343Swollman# Michigan 59614343Swollman# 59719878Swollman# From Bob Devine (1988-01-28): 59814343Swollman# Michigan didn't observe DST from 1968 to 1973. 59914343Swollman# 60058787Sru# From Paul Eggert (1999-03-31): 60158787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 60258787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 60358787Sru# that Detroit kept 60414343Swollman# 60514343Swollman# local time until 1900 when the City Council decreed that clocks should 60614343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 60714343Swollman# city obeyed, half refused. After considerable debate, the decision 60814343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 60914343Swollman# erect a sundial in front of the city hall was referred to the 61014343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 61114343Swollman# by city vote. 61214343Swollman# 61314343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 61414343Swollman# 61575267Swollman# From Paul Eggert (2001-03-06): 61675267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 61775267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 61875267Swollman# info, so omit this for now. 61975267Swollman# 62014343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 62114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 62214343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 62314343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 62414343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 62514343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 62614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 62714343SwollmanZone America/Detroit -5:32:11 - LMT 1905 62814343Swollman -6:00 - CST 1915 May 15 2:00 62914343Swollman -5:00 - EST 1942 63014343Swollman -5:00 US E%sT 1946 63114343Swollman -5:00 Detroit E%sT 1973 63214343Swollman -5:00 US E%sT 1975 63314343Swollman -5:00 - EST 1975 Apr 27 2:00 63414343Swollman -5:00 US E%sT 63514343Swollman# 63614343Swollman# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973. 63714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 63814343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 63914343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 64014343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 64114343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 64214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 64314343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 64414343Swollman -6:00 US C%sT 1946 64514343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 64614343Swollman -5:00 - EST 1973 Apr 29 2:00 64714343Swollman -6:00 US C%sT 64814343Swollman 6492742Swollman# Navassa 65086222Swollman# administered by the US Fish and Wildlife Service 65143543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 65243543Swollman# also claimed by Haiti 65343543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 65486222Swollman# US lighthouse 1917/1996-09 65543543Swollman# currently uninhabited 65643543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 65743543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 65843543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 65914343Swollman 66019878Swollman# Old names, for S5 users 66119878Swollman 66219878Swollman# Link LINK-FROM LINK-TO 66319878SwollmanLink America/New_York EST5EDT 66419878SwollmanLink America/Chicago CST6CDT 66519878SwollmanLink America/Denver MST7MDT 66619878SwollmanLink America/Los_Angeles PST8PDT 66719878SwollmanLink America/Indianapolis EST 66819878SwollmanLink America/Phoenix MST 66919878SwollmanLink Pacific/Honolulu HST 67019878Swollman 6712742Swollman################################################################################ 6722742Swollman 6732742Swollman 67458787Sru# From Paul Eggert <eggert@twinsun.com> (1999-10-29): 67514343Swollman# A good source for time zone historical data outside the US is 67658787Sru# Thomas G. Shanks, The International Atlas (5th edition), 67758787Sru# San Diego: ACS Publications, Inc. (1999). 6782742Swollman# 67986222Swollman# Gwillim Law writes that a good source 68020094Swollman# for recent time zone data is the International Air Transport 68120094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 68220094Swollman# published semiannually. Law sent in several helpful summaries 68320094Swollman# of the IATA's data after 1990. 68420094Swollman# 68520094Swollman# Except where otherwise noted, Shanks is the source for entries through 1990, 68620094Swollman# and IATA SSIM is the source for entries after 1990. 68720094Swollman# 688121098Swollman# Other sources occasionally used include: 6892742Swollman# 690121098Swollman# Edward W. Whitman, World Time Differences, 691121098Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), 692121098Swollman# which I found in the UCLA library. 693121098Swollman# 694121098Swollman# <a href="http://www.pettswoodvillage.co.uk/Daylight_Savings_William_Willett.pdf"> 695121098Swollman# William Willett, The Waste of Daylight, 19th edition 696121098Swollman# </a> (1914-03) 697121098Swollman# 6989908Swollman# See the `europe' file for Greenland. 6992742Swollman 7002742Swollman# Canada 7012742Swollman 7029908Swollman# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14): 7039908Swollman# I post here the time zone abbreviations standardized in Canada 7049908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 7059908Swollman# 7069908Swollman# UTC Standard time Daylight savings time 7079908Swollman# offset French English French English 7089908Swollman# -2:30 - - HAT NDT 7099908Swollman# -3 - - HAA ADT 7109908Swollman# -3:30 HNT NST - - 7119908Swollman# -4 HNA AST HAE EDT 7129908Swollman# -5 HNE EST HAC CDT 7139908Swollman# -6 HNC CST HAR MDT 7149908Swollman# -7 HNR MST HAP PDT 7159908Swollman# -8 HNP PST HAY YDT 7169908Swollman# -9 HNY YST - - 7179908Swollman# 7189908Swollman# HN: Heure Normale ST: Standard Time 7199908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 7209908Swollman# 7219908Swollman# A: de l'Atlantique Atlantic 7229908Swollman# C: du Centre Central 7239908Swollman# E: de l'Est Eastern 7249908Swollman# M: Mountain 7259908Swollman# N: Newfoundland 7269908Swollman# P: du Pacifique Pacific 7279908Swollman# R: des Rocheuses 7289908Swollman# T: de Terre-Neuve 7299908Swollman# Y: du Yukon Yukon 7309908Swollman# 7319908Swollman# From Paul Eggert <eggert@twinsun.com> (1994-11-22): 7329908Swollman# Alas, this sort of thing must be handled by localization software. 7332742Swollman 73467578Swollman# Unless otherwise specified, the data for Canada are all from Shanks. 7359908Swollman 73667578Swollman# From Paul Eggert (2000-10-02): 73767578Swollman# H. David Matthews and Mary Vincent's map 73867578Swollman# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm"> 73967578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 74067578Swollman# </a> contains detailed boundaries for regions observing nonstandard 74167578Swollman# time and daylight saving time arrangements in Canada circa 1998. 74267578Swollman# 74367578Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has 74467578Swollman# <a href="http://www.nrc.ca/inms/time/tze.html"> 74567578Swollman# information about standard and daylight saving time zones in Canada. 74667578Swollman# </a> (updated periodically). 74767578Swollman# Its unofficial information is often taken from Matthews and Vincent. 7489908Swollman 7492742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 75017200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 75117200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 752121098SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W # War 753121098SwollmanRule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace 75417200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 75517200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 75617200SwollmanRule Canada 1974 max - Oct lastSun 2:00 0 S 75717200SwollmanRule Canada 1987 max - Apr Sun>=1 2:00 1:00 D 75817200Swollman 75917200Swollman 76067578Swollman# Newfoundland (and far southeast Labrador) 76117200Swollman 76267578Swollman# From Paul Eggert (2000-10-02): 76367578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 76467578Swollman# but the only part of Labrador that follows the rules is the 76567578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 76667578Swollman# but excluding, say, Black Tickle. 76767578Swollman 76817200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 769121098SwollmanRule StJohns 1917 only - Apr 8 2:00 1:00 D 7702742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 7712742Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. 7722742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 7732742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 7742742Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks. 7752742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 7762742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 777121098Swollman# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks. 778121098SwollmanRule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D 779121098SwollmanRule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S 780121098Swollman# Whitman gives the following transitions: 781121098Swollman# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 782121098Swollman# but go with Shanks and assume they used Canadian rules. 7832742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 7842742Swollman# Apr 30 - Sep 24; go with Shanks. 7852742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 7862742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 7872742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 7882742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 78967578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 79067578Swollman# From Paul Eggert (2000-10-02): 79167578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 79267578Swollman# at 00:01 local time. For now, assume it started in 1987. 79367578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 79467578SwollmanRule StJohns 1987 max - Oct lastSun 0:01 0 S 79567578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 79667578SwollmanRule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D 7972742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 7982742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 7992742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 800121098Swollman -3:30:52 StJohns N%sT 1918 801121098Swollman -3:30:52 Canada N%sT 1919 80220094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 803121098Swollman -3:30 StJohns N%sT 1942 May 11 804121098Swollman -3:30 Canada N%sT 1946 8052742Swollman -3:30 StJohns N%sT 8062742Swollman 80767578Swollman# most of east Labrador 80817200Swollman 80920094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 81020094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 81120094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 812121098Swollman -3:30:52 - NST 1918 813121098Swollman -3:30:52 Canada N%sT 1919 81420094Swollman -3:30:52 - NST 1935 Mar 30 81520094Swollman -3:30 - NST 1936 816121098Swollman -3:30 StJohns N%sT 1942 May 11 817121098Swollman -3:30 Canada N%sT 1946 81820094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 81920094Swollman -4:00 StJohns A%sT 82020094Swollman 82120094Swollman 82220094Swollman# west Labrador, New Brunswick, Nova Scotia, Prince Edward I 82320094Swollman 82417200Swollman# From Paul Eggert (1996-06-12): 82517200Swollman# Shanks writes that since 1970 most of this region has been like Halifax. 82617200Swollman# Many locales did not observe peacetime DST until 1972; 82717200Swollman# Glace Bay, NS is the largest that we know of. 82817200Swollman# Shanks also writes that Liverpool, NS was the only town in Canada to observe 82917200Swollman# DST in 1971 but not 1970; for now we'll assume this is a typo. 83017200Swollman 83167578Swollman# From Paul Eggert (2000-10-02): 83267578Swollman# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches 83367578Swollman# at 00:01 local time. FIXME: verify and create a new Zone for this. 83467578Swollman 83567578Swollman 8362742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 8372742SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 8382742SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 8392742SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 8402742SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 8412742SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 8422742SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 8432742SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 8442742SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 8452742SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 8462742SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 8472742SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 8482742SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 8492742SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 8502742SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 8512742SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 8522742SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 8532742SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 8542742SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 8552742SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 8562742SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 857121098SwollmanRule Halifax 1932 only - May 1 0:00 1:00 D 8582742SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 8592742SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 8602742SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 8612742SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 8622742SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 8632742SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 8642742SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 8652742SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 8662742SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 8672742SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 8682742SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 8692742SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 870121098SwollmanRule Halifax 1946 1949 - Sep lastSun 2:00 0 S 871121098SwollmanRule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D 872121098SwollmanRule Halifax 1951 1954 - Sep lastSun 2:00 0 S 873121098SwollmanRule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D 874121098SwollmanRule Halifax 1956 1959 - Sep lastSun 2:00 0 S 875121098SwollmanRule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D 876121098SwollmanRule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D 877121098SwollmanRule Halifax 1962 1973 - Oct lastSun 2:00 0 S 8782742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8792742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 880121098Swollman -4:00 Halifax A%sT 1918 881121098Swollman -4:00 Canada A%sT 1919 882121098Swollman -4:00 Halifax A%sT 1942 Feb 9 2:00s 883121098Swollman -4:00 Canada A%sT 1946 884121098Swollman -4:00 Halifax A%sT 1974 885121098Swollman -4:00 Canada A%sT 88617200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 88717200Swollman -4:00 Canada A%sT 1953 88817200Swollman -4:00 Halifax A%sT 1954 88917200Swollman -4:00 - AST 1972 890121098Swollman -4:00 Halifax A%sT 1974 891121098Swollman -4:00 Canada A%sT 8922742Swollman 8938029Swollman 89417200Swollman# Ontario, Quebec 89517200Swollman 89617200Swollman# From Paul Eggert (1996-06-12): 897121098Swollman# Shanks writes that since 1970 most of Ontario has been like Toronto, 898121098Swollman# and most of Quebec has been like Montreal. 89917200Swollman# Thunder Bay skipped DST in 1973. 90017200Swollman# Many smaller locales did not observe peacetime DST until 1974; 90117200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 90217200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 90317200Swollman 904121098Swollman# From Mark Brader (2003-07-26): 905121098Swollman# [According to the Toronto Star] Orillia, Ontario, adopted DST 906121098Swollman# effective Saturday, 1912-06-22, 22:00; the article mentions that 907121098Swollman# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw 908121098Swollman# have already done so. In Orillia DST was to run until Saturday, 909121098Swollman# 1912-08-31 (no time mentioned), but it was met with considerable 910121098Swollman# hostility from certain segments of the public, and was revoked after 911121098Swollman# only two weeks -- I copied it as Saturday, 1912-07-07, 22:00, but 912121098Swollman# presumably that should be -07-06. (1912-06-19, -07-12; also letters 913121098Swollman# earlier in June). 914121098Swollman# 915121098Swollman# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). 916121098Swollman 91743014Swollman# From Paul Eggert (1997-10-17): 918121098Swollman# Mark Brader writes that an article in the 1997-10-14 Toronto Star 91943014Swollman# says that Atikokan, Ontario currently does not observe DST, 92043014Swollman# but will vote on 11-10 whether to use EST/EDT. 92143014Swollman# He also writes that the 92243014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 92343014Swollman# Ontario Time Act (1990, Chapter T.9) 92443014Swollman# </a> 92543014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 92643014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 92743014Swollman# concerns a non-official time observed as a matter of local practice. 92858787Sru# For what it's worth, Shanks says that Atikokan has agreed with 92943014Swollman# Rainy River ever since standard time was introduced. 93043014Swollman 93167578Swollman# From Paul Eggert (2000-10-02): 93267578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 93367578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 93467578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 93567578Swollman# violation of the official Ontario rules. 93667578Swollman# They also write that Quebec east of the -63 meridian is supposed to 93767578Swollman# observe AST, but residents as far east as Natashquan use EST/EDT, 93867578Swollman# and residents east of Natashquan use AST. 93967578Swollman# We probably need Zones for far east Quebec and for Atikokan, 94067578Swollman# but we don't know when their practices started. 94167578Swollman 9422742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 9432742SwollmanRule Mont 1917 only - Mar 25 2:00 1:00 D 9442742SwollmanRule Mont 1917 only - Apr 24 0:00 0 S 9452742SwollmanRule Mont 1919 only - Mar 31 2:30 1:00 D 9462742SwollmanRule Mont 1919 only - Oct 25 2:30 0 S 9472742SwollmanRule Mont 1920 only - May 2 2:30 1:00 D 948121098SwollmanRule Mont 1920 1922 - Oct Sun>=1 2:30 0 S 9492742SwollmanRule Mont 1921 only - May 1 2:00 1:00 D 9502742SwollmanRule Mont 1922 only - Apr 30 2:00 1:00 D 9512742SwollmanRule Mont 1924 only - May 17 2:00 1:00 D 9522742SwollmanRule Mont 1924 1926 - Sep lastSun 2:30 0 S 9532742SwollmanRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 954121098SwollmanRule Mont 1927 1937 - Apr lastSat 24:00 1:00 D 955121098SwollmanRule Mont 1927 1937 - Sep lastSat 24:00 0 S 956121098SwollmanRule Mont 1938 1940 - Apr lastSun 0:00 1:00 D 957121098SwollmanRule Mont 1938 1939 - Sep lastSun 0:00 0 S 958121098SwollmanRule Mont 1946 1973 - Apr lastSun 2:00 1:00 D 9592742SwollmanRule Mont 1945 1948 - Sep lastSun 2:00 0 S 9602742SwollmanRule Mont 1949 1950 - Oct lastSun 2:00 0 S 9612742SwollmanRule Mont 1951 1956 - Sep lastSun 2:00 0 S 962121098SwollmanRule Mont 1957 1973 - Oct lastSun 2:00 0 S 963121098Swollman 964121098SwollmanRule Toronto 1919 only - Mar 30 23:30 1:00 D 965121098SwollmanRule Toronto 1919 only - Oct 26 0:00 0 S 966121098SwollmanRule Toronto 1920 only - May 2 2:00 1:00 D 967121098SwollmanRule Toronto 1920 only - Sep 26 0:00 0 S 968121098SwollmanRule Toronto 1921 only - May 15 2:00 1:00 D 969121098SwollmanRule Toronto 1921 only - Sep 15 2:00 0 S 970121098SwollmanRule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D 971121098Swollman# Shanks says 1923-09-19; assume it's a typo and that "-16" was meant. 972121098SwollmanRule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S 973121098SwollmanRule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D 974121098SwollmanRule Toronto 1927 1928 - Sep lastSun 2:00 0 S 975121098SwollmanRule Toronto 1928 only - Apr lastSun 2:00 1:00 D 976121098SwollmanRule Toronto 1929 only - Apr lastSun 0:00 1:00 D 977121098SwollmanRule Toronto 1929 only - Sep lastSun 0:00 0 S 978121098SwollmanRule Toronto 1930 1937 - Apr lastSat 24:00 1:00 D 979121098SwollmanRule Toronto 1930 1937 - Sep lastSat 24:00 0 S 980121098SwollmanRule Toronto 1938 1940 - Apr lastSun 0:00 1:00 D 981121098SwollmanRule Toronto 1938 1939 - Sep lastSun 0:00 0 S 982121098SwollmanRule Toronto 1945 1946 - Sep lastSun 2:00 0 S 983121098SwollmanRule Toronto 1946 only - Apr lastSun 2:00 1:00 D 984121098SwollmanRule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D 985121098SwollmanRule Toronto 1947 1948 - Sep lastSun 0:00 0 S 986121098SwollmanRule Toronto 1949 only - Nov lastSun 0:00 0 S 987121098SwollmanRule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D 988121098SwollmanRule Toronto 1950 only - Nov lastSun 2:00 0 S 989121098SwollmanRule Toronto 1951 1956 - Sep lastSun 2:00 0 S 990121098Swollman# Shanks says Toronto ended DST a week early in 1971, namely on 1971-10-24, 991121098Swollman# but Mark Brader wrote (2003-05-31) that he checked the 1971-10-30 issue 992121098Swollman# of the Toronto Star, and it said that DST ended 1971-10-31 as usual. 993121098SwollmanRule Toronto 1957 1973 - Oct lastSun 2:00 0 S 994121098Swollman 995121098Swollman# From Paul Eggert (2003-07-27): 996121098Swollman# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and 997121098Swollman# Port Arthur, Ontario, the principle of the Bill has been in 998121098Swollman# operation for the past three years, and in the City of Moose Jaw, 999121098Swollman# Saskatchewan, for one year." Assume that the Thunder Bay region 1000121098Swollman# observed DST starting 1910, and Moose Jaw starting 1912, as this 1001121098Swollman# matches the Toronto Star report about Moose Jaw. For lack of better 1002121098Swollman# info, assume the Thunder Bay region used Willett's proposal, namely 1003121098Swollman# third Sunday in April at 02:00 to third Sunday in September at 1004121098Swollman# 03:00; also assume that they continued until Canada instituted 1005121098Swollman# uniform DST in 1918. 1006121098SwollmanRule Thunder 1910 1917 - Apr Sun>=15 2:00s 1:00 D 1007121098SwollmanRule Thunder 1910 1917 - Sep Sun>=15 2:00s 0 S 1008121098Swollman 10092742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10102742SwollmanZone America/Montreal -4:54:16 - LMT 1884 1011121098Swollman -5:00 Mont E%sT 1918 1012121098Swollman -5:00 Canada E%sT 1919 1013121098Swollman -5:00 Mont E%sT 1942 Feb 9 2:00s 1014121098Swollman -5:00 Canada E%sT 1946 1015121098Swollman -5:00 Mont E%sT 1974 1016121098Swollman -5:00 Canada E%sT 1017121098SwollmanZone America/Toronto -5:17:32 - LMT 1895 1018121098Swollman -5:00 Canada E%sT 1919 1019121098Swollman -5:00 Toronto E%sT 1942 Feb 9 2:00s 1020121098Swollman -5:00 Canada E%sT 1946 1021121098Swollman -5:00 Toronto E%sT 1974 1022121098Swollman -5:00 Canada E%sT 102317200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 1024121098Swollman -5:00 Thunder E%sT 1918 1025121098Swollman -5:00 Canada E%sT 1940 Sep 29 1026121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 102717200Swollman -5:00 Canada E%sT 1970 102817200Swollman -5:00 Mont E%sT 1973 102917200Swollman -5:00 - EST 1974 103017200Swollman -5:00 Canada E%sT 103117200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 1032121098Swollman -5:00 Canada E%sT 1940 Sep 29 1033121098Swollman -5:00 1:00 EDT 1942 Feb 9 2:00s 103417200Swollman -5:00 Canada E%sT 103517200SwollmanZone America/Rainy_River -6:17:56 - LMT 1895 1036121098Swollman -6:00 Canada C%sT 1940 Sep 29 1037121098Swollman -6:00 1:00 CDT 1942 Feb 9 2:00s 103817200Swollman -6:00 Canada C%sT 10392742Swollman 10408029Swollman 104117200Swollman# Manitoba 104219878Swollman 10432742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 10442742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 10452742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 10462742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 10472742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 10482742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 104914343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 1050121098SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W # War 1051121098SwollmanRule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace 10522742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 10532742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 10542742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 10552742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 105614343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 105714343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 105814343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 105914343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 106014343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 10612742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 10622742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 10632742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 106414343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 10652742SwollmanRule Winn 1966 1986 - Apr lastSun 2:00 1:00 D 106667578SwollmanRule Winn 1966 1986 - Oct lastSun 2:00 0 S 10672742SwollmanRule Winn 1987 max - Apr Sun>=1 2:00 1:00 D 106867578Swollman# From Paul Eggert (2000-10-02): 106967578Swollman# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from 107067578Swollman# DST at 03:00 local time. For now, assume it started in 1987. 107167578SwollmanRule Winn 1987 max - Oct lastSun 2:00s 0 S 10722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10732742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 10742742Swollman -6:00 Winn C%sT 10752742Swollman 10768029Swollman 107717200Swollman# Saskatchewan 107817200Swollman 1079121098Swollman# From Mark Brader (2003-07-26): 1080121098Swollman# The first actual adoption of DST in Canada was at the municipal 1081121098Swollman# level. As the [Toronto] Star put it (1912-06-07), "While people 1082121098Swollman# elsewhere have long been talking of legislation to save daylight, 1083121098Swollman# the city of Moose Jaw [Saskatchewan] has acted on its own hook." 1084121098Swollman# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: 1085121098Swollman# presumably late evening, as below), and would run until "the end of 1086121098Swollman# the summer". The discrepancy between municipal time and railroad 1087121098Swollman# time was noted. 1088121098Swollman 1089121098Swollman# From Paul Eggert (2003-07-27): 1090121098Swollman# Willett (1914-03) notes that DST "has been in operation ... in the 1091121098Swollman# City of Moose Jaw, Saskatchewan, for one year." 1092121098Swollman 109367578Swollman# From Paul Eggert (2000-10-02): 109417200Swollman# Shanks writes that since 1970 most of this region has been like Regina. 109517200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 109617200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 109767578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 109867578Swollman# are like Winnipeg, in violation of Saskatchewan law. 109917200Swollman 110019878Swollman# From W. Jones <jones@skdad.usask.ca> (1992-11-06): 110117200Swollman# The. . .below is based on information I got from our law library, the 110217200Swollman# provincial archives, and the provincial Community Services department. 110317200Swollman# A precise history would require digging through newspaper archives, and 110417200Swollman# since you didn't say what you wanted, I didn't bother. 110517200Swollman# 110617200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 110717200Swollman# the boundary became pretty ragged as communities near it reevaluated 110817200Swollman# their affiliations in one direction or the other. In 1965 a provincial 110917200Swollman# referendum favoured legislating common time practices. 111017200Swollman# 111117200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 111217200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 111317200Swollman# part of Saskatchewan would use CST year round, that districts in 111417200Swollman# northwest Saskatchewan would by default follow CST but could opt to 111517200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 111617200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 111717200Swollman# by default follow MT but could opt to follow CST. 111817200Swollman# 111917200Swollman# It took a few years for the dust to settle (I know one story of a town 112017200Swollman# on one time zone having its school in another, such that a mom had to 112117200Swollman# serve her family lunch in two shifts), but presently it seems that only 112217200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 112317200Swollman# rules any more; all other districts appear to have used CST year round 112417200Swollman# since sometime in the 1960s. 112517200Swollman 11262742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 11272742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 11282742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 11292742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 11302742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 11312742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 11322742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 11332742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 11342742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 1135121098SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W # War 1136121098SwollmanRule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace 11372742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 113817200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 113917200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 1140121098SwollmanRule Regina 1947 1957 - Apr lastSun 2:00 1:00 D 1141121098SwollmanRule Regina 1947 1957 - Sep lastSun 2:00 0 S 1142121098SwollmanRule Regina 1959 only - Apr lastSun 2:00 1:00 D 114317200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 114417200Swollman# 114517200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 114617200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 114717200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 114817200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 114917200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 11502742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 115117200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 115217200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 11532742Swollman -6:00 - CST 115417200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 115517200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 115617200Swollman -7:00 Regina M%sT 1950 115717200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 115817200Swollman -6:00 - CST 11592742Swollman 11608029Swollman 116117200Swollman# Alberta 116217200Swollman 11632742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 11642742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 11652742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 11662742SwollmanRule Edm 1919 only - May 27 2:00 0 S 11672742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 11682742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 11692742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 1170121098SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W # War 1171121098SwollmanRule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace 11722742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 11732742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 11742742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 11752742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 11762742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 11772742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 11782742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 11792742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 11802742SwollmanRule Edm 1972 max - Oct lastSun 2:00 0 S 11812742SwollmanRule Edm 1987 max - Apr Sun>=1 2:00 1:00 D 11822742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 11832742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 11842742Swollman -7:00 Edm M%sT 11852742Swollman 11868029Swollman 118717200Swollman# British Columbia 118817200Swollman 118967578Swollman# From Paul Eggert (2000-10-02): 119017200Swollman# Shanks writes that since 1970 most of this region has been like Vancouver. 119158787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 119267578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 119317200Swollman 11942742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 11952742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 11962742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 1197121098SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W # War 1198121098SwollmanRule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace 11992742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 12002742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 12012742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 12022742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 12032742SwollmanRule Vanc 1962 max - Oct lastSun 2:00 0 S 12042742SwollmanRule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D 12052742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 12062742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 12072742Swollman -8:00 Vanc P%sT 120817200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 120917200Swollman -8:00 Canada P%sT 1947 121017200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 121117200Swollman -7:00 - MST 12122742Swollman 12138029Swollman 121458787Sru# Northwest Territories, Nunavut, Yukon 121517200Swollman 121658787Sru# From Paul Eggert (1999-10-29): 121717200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 121820094Swollman# Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs: 121920094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 122020094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 122120094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 122220094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 122320094Swollman# * O.I.C. 1980/02 established DST. 122420094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 122520094Swollman# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander. 122617200Swollman 122758787Sru# From Rives McDow (1999-09-04): 122858787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 122958787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 123058787Sru# Nunavut moves to single time zone Oct. 31 123158787Sru# </a> 123258787Sru# 123358787Sru# From Antoine Leca (1999-09-06): 123458787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 123558787Sru# to differentiate it from the Yellowknife region. 123658787Sru 123758787Sru# From Paul Eggert (1999-09-20): 123858787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 123958787Sru# Basic Facts: The New Territory 124086222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 124158787Sru# and that Coral Harbour does not observe DST. We don't know when 124286222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 124358787Sru# We'll ignore the claim about Coral Harbour for now, 124458787Sru# since we have no further info. 124558787Sru 124658787Sru# From Rives McDow (1999-11-08): 124758787Sru# On October 31, when the rest of Nunavut went to Central time, 124858787Sru# Pangnirtung wobbled. Here is the result of their wobble: 124958787Sru# 125058787Sru# The following businesses and organizations in Pangnirtung use Central Time: 125158787Sru# 125258787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 125358787Sru# Eastern Arctic National Parks, A & D Specialist 125458787Sru# 125558787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 125658787Sru# 125758787Sru# Hamlet office, All other businesses, Both schools, Airport operator 125858787Sru# 125958787Sru# This has made for an interesting situation there, which warranted the news. 126058787Sru# No one there that I spoke with seems concerned, or has plans to 126158787Sru# change the local methods of keeping time, as it evidently does not 126258787Sru# really interfere with any activities or make things difficult locally. 126358787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 126458787Sru# so it appears that the situation will last at least that long. 126558787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 126658787Sru# their senses", but the locals evidently don't see any problem with 126758787Sru# the current state of affairs. 126858787Sru 126958787Sru# From Michaela Rodrigue, writing in the 127058787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 127158787Sru# Nunatsiaq News (1999-11-19)</a>: 127258787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 127358787Sru# central - or Nunavut time - for government offices, and eastern time 127458787Sru# for municipal offices and schools.... Igloolik [was similar but then] 127558787Sru# made the switch to central time on Saturday, Nov. 6. 127658787Sru 127767578Swollman# From Paul Eggert (2000-10-02): 127867578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 127967578Swollman# for these potential new Zones. 128075267Swollman# 128167578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 128267578Swollman# handful of residents at the Eureka weather station [in the Central 128367578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 128467578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 128567578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 128667578Swollman# Central Time and Southampton Island [in the Central zone] is not 128767578Swollman# required to use daylight savings. 128867578Swollman 128975267Swollman# From 129075267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 129175267Swollman# Nunavut now has two time zones 129275267Swollman# </a> (2000-11-10): 129375267Swollman# The Nunavut government would allow its employees in Kugluktuk and 129475267Swollman# Cambridge Bay to operate on central time year-round, putting them 129575267Swollman# one hour behind the rest of Nunavut for six months during the winter. 129675267Swollman# At the end of October the two communities had rebelled against 129775267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 129875267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 129975267Swollman# central time, while Kugluktuk, even farther west, reverted to 130075267Swollman# mountain time, which they had used before the advent of Nunavut's 130175267Swollman# unified time zone in 1999. 130275267Swollman# 130375267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 130475267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 130575267Swollman 130675267Swollman# From Paul Eggert (2000-12-04): 130775267Swollman# Let's just keep track of the official times for now. 130875267Swollman 130975267Swollman# From Rives McDow (2001-03-07): 131075267Swollman# The premier of Nunavut has issued a ministerial statement advising 131175267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 131275267Swollman# back to three time zones (mountain, central, and eastern). Of the 131375267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 131475267Swollman# has said it will not observe dst, staying on EST year round. I'm 131575267Swollman# checking for more info, and will get back to you if I come up with 131675267Swollman# more. 131775267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 131875267Swollman 13192742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 132017200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 132117200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 132217200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 132317200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 1324121098SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W # War 1325121098SwollmanRule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace 132617200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 132717200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 132817200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 132917200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 133017200SwollmanRule NT_YK 1980 max - Oct lastSun 2:00 0 S 133117200SwollmanRule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D 13322742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 133317200SwollmanZone America/Pangnirtung -4:22:56 - LMT 1884 133458787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 133558787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 133675267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 133775267Swollman -5:00 Canada E%sT 133858787SruZone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 133958787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 134075267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 134175267Swollman -5:00 Canada E%sT 134275267SwollmanZone America/Rankin_Inlet -6:08:40 - LMT 1884 134375267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 134475267Swollman -5:00 - EST 2001 Apr 1 3:00 134558787Sru -6:00 Canada C%sT 134658787SruZone America/Cambridge_Bay -7:00:20 - LMT 1884 134758787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 134875267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 134975267Swollman -5:00 - EST 2000 Nov 5 0:00 135075267Swollman -6:00 - CST 2001 Apr 1 3:00 135175267Swollman -7:00 Canada M%sT 135217200SwollmanZone America/Yellowknife -7:37:24 - LMT 1884 135317200Swollman -7:00 NT_YK M%sT 135417200SwollmanZone America/Inuvik -8:54:00 - LMT 1884 135517200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 135617200Swollman -7:00 NT_YK M%sT 13572742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 135817200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 135917200Swollman -8:00 NT_YK P%sT 136017200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 136120094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 136217200Swollman -8:00 NT_YK P%sT 13632742Swollman 13648029Swollman 13652742Swollman############################################################################### 13662742Swollman 13672742Swollman# Mexico 13682742Swollman 136975267Swollman# From Paul Eggert (2001-03-05): 137075267Swollman# The Investigation and Analysis Service of the 137175267Swollman# Mexican Library of Congress (MLoC) has published a 137275267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 137375267Swollman# history of Mexican local time (in Spanish) 137475267Swollman# </a>. 13752742Swollman# 137675267Swollman# Here are the discrepancies between Shanks and the MLoC. 137775267Swollman# (In all cases we go with the MLoC.) 137875267Swollman# Shanks reports that Baja was at -8:00 in 1922/1923. 137975267Swollman# Shanks says the 1930 transition in Baja was 1930-11-16. 138075267Swollman# Shanks reports no DST during summer 1931. 138175267Swollman# Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01. 138275267Swollman# Shanks does not report transitions for Baja in 1945 or 1948. 138375267Swollman# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23. 138475267Swollman# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00 138575267Swollman# on 1997-10-26 at 02:00. 13862742Swollman 138775267Swollman# From Gwillim Law (2001-02-20): 138875267Swollman# There are some other discrepancies between the Decrees page and the 138975267Swollman# tz database. I think they can best be explained by supposing that 139075267Swollman# the researchers who prepared the Decrees page failed to find some of 139175267Swollman# the relevant documents. 139275267Swollman 139364499Swollman# From Paul Eggert (2000-07-26): 139464499Swollman# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 139564499Swollman# and 1988 DST experiments. Go with spin.com.mx. 13962742Swollman 139717200Swollman# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15): 139817200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 139917200Swollman# outlining the timezone changes in Mexico. 140058787Sru# 140117200Swollman# ------------- Begin Forwarded Message ------------- 140258787Sru# 140317200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 140417200Swollman# rules for the DST changes. The rules are: 140558787Sru# 140617200Swollman# 1. The country is divided in 3 timezones: 140717200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 140817200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 140917200Swollman# - The rest of the country (the Mexico/General TZ) 141058787Sru# 141117200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 141217200Swollman# at 2:00 AM, the times in each zone are as follows: 141317200Swollman# BajaNorte: GMT+7 141417200Swollman# BajaSur: GMT+6 141517200Swollman# General: GMT+5 141658787Sru# 141717200Swollman# 3. The rest of the year, the times are as follows: 141817200Swollman# BajaNorte: GMT+8 141917200Swollman# BajaSur: GMT+7 142017200Swollman# General: GMT+6 142158787Sru# 142217200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 142358787Sru# 142417200Swollman# -------------- End Forwarded Message -------------- 142517200Swollman# From Paul Eggert (1996-06-12): 142643014Swollman# For an English translation of the decree, see 142743014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 142843014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 142943014Swollman# </a> 143014343Swollman 143143543Swollman# From Rives McDow (1998-10-08): 143243543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 143343543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 143443543Swollman 143558787Sru# From Rives McDow (2000-01-10): 143658787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 143758787Sru# zone 5 hours from the International Date Line, and will not observe daylight 143858787Sru# savings time so as to stay on the same time zone as the southern part of 143958787Sru# Arizona year round. 144058787Sru 144175267Swollman# From Jesper Norgaard, translating 144275267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 144375267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 144475267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 144575267Swollman# year, so that the more than 10,000 schools work at normal hour the 144675267Swollman# whole year. 144775267Swollman 144875267Swollman# From Gwillim Law (2001-01-19): 144975267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 145075267Swollman# (translated):... 145175267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 145275267Swollman# that Summer Time will be reduced from seven to five months, starting 145375267Swollman# this year.... 145475267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 145575267Swollman# [translated], says "summer time will ... take effect on the first Sunday 145675267Swollman# in May, and end on the last Sunday of September. 145775267Swollman 145875267Swollman# From Arthur David Olson (2001-01-25): 145975267Swollman# The 2001-01-24 traditional Washington Post contained the page one 146075267Swollman# story "Timely Issue Divides Mexicans."... 146175267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 146275267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 146375267Swollman# Mexico City and its 20 million residents on a different time than 146475267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 146575267Swollman# observation of Daylight Saving Time. 146675267Swollman 146775267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 146875267Swollman# Official statute published by the Energy Department 146975267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 147075267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 147175267Swollman 147275267Swollman# From Paul Eggert (2001-03-03): 147375267Swollman# 147475267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 147575267Swollman# James F. Smith writes in today's LA Times 147675267Swollman# </a> 147775267Swollman# * Sonora will continue to observe standard time. 147875267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 147975267Swollman# the Federal District will not adopt DST. 148075267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 148175267Swollman# * The decree does not affect federal-controlled facilities including 148275267Swollman# the airport, banks, hospitals, and schools. 148375267Swollman# 148475267Swollman# For now we'll assume that the Federal District will bow to federal rules. 148575267Swollman 148675267Swollman# From Jesper Norgaard (2001-04-01): 148775267Swollman# I found some references to the Mexican application of daylight 148875267Swollman# saving, which modifies what I had already sent you, stating earlier 148975267Swollman# that a number of northern Mexican states would go on daylight 149075267Swollman# saving. The modification reverts this to only cover Baja California 149175267Swollman# (Norte), while all other states (except Sonora, who has no daylight 149275267Swollman# saving all year) will follow the original decree of president 149375267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 149475267Swollman# September 30, 2001. 149575267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 149675267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 149775267Swollman 149886222Swollman# From Reuters (2001-09-04): 149986222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 150086222Swollman# unconstitutional in Mexico City, creating the possibility the 150186222Swollman# capital will be in a different time zone from the rest of the nation 150286222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 150386222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 150486222Swollman# standard time. "This is so residents of the Federal District are not 150586222Swollman# subject to unexpected time changes," a statement from the court said. 150686222Swollman 150793799Swollman# From Jesper Norgaard Welen (2002-03-12): 150893799Swollman# ... consulting my local grocery store(!) and my coworkers, they all insisted 150993799Swollman# that a new decision had been made to reinstate US style DST in Mexico.... 151093799Swollman# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) 151193799Swollman# confirms this. Sonora as usual is the only state where DST is not applied. 151293799Swollman 15132742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15142742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 15152742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 15162742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 15172742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 1518121098SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W # War 15192742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 15202742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 15212742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 152275267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 152375267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 152493799SwollmanRule Mexico 2001 only - May Sun>=1 2:00 1:00 D 152593799SwollmanRule Mexico 2001 only - Sep lastSun 2:00 0 S 152693799SwollmanRule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D 152793799SwollmanRule Mexico 2002 max - Oct lastSun 2:00 0 S 15282742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 152943014Swollman# Quintana Roo 153058787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 153175267Swollman -6:00 - CST 1981 Dec 23 153243543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 153343543Swollman -6:00 Mexico C%sT 153464499Swollman# Campeche, Yucatan 153564499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 153675267Swollman -6:00 - CST 1981 Dec 23 153764499Swollman -5:00 - EST 1982 Dec 2 153864499Swollman -6:00 Mexico C%sT 153964499Swollman# Coahuila, Durango, Nuevo Leon, Tamaulipas 154075267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 154164499Swollman -6:00 - CST 1988 154264499Swollman -6:00 US C%sT 1989 154364499Swollman -6:00 Mexico C%sT 154443014Swollman# Central Mexico 15452742SwollmanZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 15462742Swollman -7:00 - MST 1927 Jun 10 23:00 15472742Swollman -6:00 - CST 1930 Nov 15 15482742Swollman -7:00 - MST 1931 May 1 23:00 15492742Swollman -6:00 - CST 1931 Oct 155075267Swollman -7:00 - MST 1932 Apr 1 155186222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 155293799Swollman -6:00 - CST 2002 Feb 20 155393799Swollman -6:00 Mexico C%sT 155443014Swollman# Chihuahua 155558787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 155643014Swollman -7:00 - MST 1927 Jun 10 23:00 155743014Swollman -6:00 - CST 1930 Nov 15 155843014Swollman -7:00 - MST 1931 May 1 23:00 155943014Swollman -6:00 - CST 1931 Oct 156075267Swollman -7:00 - MST 1932 Apr 1 156143014Swollman -6:00 - CST 1996 156243014Swollman -6:00 Mexico C%sT 1998 156343014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 156443014Swollman -7:00 Mexico M%sT 156558787Sru# Sonora 156658787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 156758787Sru -7:00 - MST 1927 Jun 10 23:00 156858787Sru -6:00 - CST 1930 Nov 15 156958787Sru -7:00 - MST 1931 May 1 23:00 157058787Sru -6:00 - CST 1931 Oct 157175267Swollman -7:00 - MST 1932 Apr 1 157264499Swollman -6:00 - CST 1942 Apr 24 157358787Sru -7:00 - MST 1949 Jan 14 157458787Sru -8:00 - PST 1970 157558787Sru -7:00 Mexico M%sT 1999 157658787Sru -7:00 - MST 157764499Swollman# Baja California Sur, Nayarit, Sinaloa 15782742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 15792742Swollman -7:00 - MST 1927 Jun 10 23:00 15802742Swollman -6:00 - CST 1930 Nov 15 15812742Swollman -7:00 - MST 1931 May 1 23:00 15822742Swollman -6:00 - CST 1931 Oct 158375267Swollman -7:00 - MST 1932 Apr 1 158464499Swollman -6:00 - CST 1942 Apr 24 15852742Swollman -7:00 - MST 1949 Jan 14 15862742Swollman -8:00 - PST 1970 158714343Swollman -7:00 Mexico M%sT 158858787Sru# Baja California 15892742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 159075267Swollman -7:00 - MST 1924 15912742Swollman -8:00 - PST 1927 Jun 10 23:00 159275267Swollman -7:00 - MST 1930 Nov 15 159375267Swollman -8:00 - PST 1931 Apr 1 159475267Swollman -8:00 1:00 PDT 1931 Sep 30 159564499Swollman -8:00 - PST 1942 Apr 24 159675267Swollman -8:00 1:00 PWT 1945 Nov 12 159775267Swollman -8:00 - PST 1948 Apr 5 159875267Swollman -8:00 1:00 PDT 1949 Jan 14 159975267Swollman -8:00 - PST 1954 160075267Swollman -8:00 CA P%sT 1961 160175267Swollman -8:00 - PST 1976 160214343Swollman -8:00 US P%sT 1996 160375267Swollman -8:00 Mexico P%sT 2001 160493799Swollman -8:00 US P%sT 2002 Feb 20 160593799Swollman -8:00 Mexico P%sT 160675267Swollman# From Paul Eggert (2001-03-05): 160775267Swollman# Formerly there was an America/Ensenada zone, which differed from 160875267Swollman# America/Tijuana only in that it did not observe DST from 1976 160975267Swollman# through 1995. This was as per Shanks. However, Guy Harris reports 161075267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 161175267Swollman# Tijuana observe DST," which contradicts Shanks but does imply that 161275267Swollman# DST-observance was a town-by-town matter back then. This concerns 161375267Swollman# data after 1970 so most likely there should be at least one Zone 161475267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 161575267Swollman# name or contents should be. 16162742Swollman# 16172742Swollman# Revillagigedo Is 16182742Swollman# no information 16192742Swollman 16202742Swollman############################################################################### 16212742Swollman 16222742Swollman# Anguilla 16232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16242742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 16252742Swollman -4:00 - AST 16262742Swollman 16272742Swollman# Antigua and Barbuda 16282742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16292742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 16302742Swollman -5:00 - EST 1951 16312742Swollman -4:00 - AST 16322742Swollman 16332742Swollman# Bahamas 16342742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16352742SwollmanRule Bahamas 1964 max - Oct lastSun 2:00 0 S 16362742SwollmanRule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D 16372742SwollmanRule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D 16382742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16392742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 16402742Swollman -5:00 Bahamas E%sT 16412742Swollman 16422742Swollman# Barbados 16432742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16442742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 16452742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 16462742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 16472742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 16482742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 16492742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16502742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 165143014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 16522742Swollman -4:00 Barb A%sT 16532742Swollman 16542742Swollman# Belize 16552742Swollman# Whitman entirely disagrees with Shanks; go with Shanks. 16562742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16572742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 16582742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 16592742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 16602742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 16612742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 16622742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 16632742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16642742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 16652742Swollman -6:00 Belize C%sT 16662742Swollman 16672742Swollman# Bermuda 16682742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16692742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 16702742Swollman -4:00 - AST 1974 Apr 28 2:00 16712742Swollman -4:00 Bahamas A%sT 16722742Swollman 16732742Swollman# Cayman Is 16742742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16752742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 167643014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 16772742Swollman -5:00 - EST 16782742Swollman 16792742Swollman# Costa Rica 16802742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16812742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 16822742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 168320094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 168420094Swollman# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks. 168520094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 168620094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 16872742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 16882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16892742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 169058787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 16912742Swollman -6:00 CR C%sT 16922742Swollman# Coco 16932742Swollman# no information; probably like America/Costa_Rica 16942742Swollman 16952742Swollman# Cuba 16962742Swollman 169758787Sru# From Arthur David Olson (1999-03-29): 169858787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 169958787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 170058787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 170158787Sru# During the game, play-by-play announcer Jim Hunter noted that 170258787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 170358787Sru# Time today." (The "two hour" remark referred to losing one hour of 170458787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 170558787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 170658787Sru# returned to Baltimore, which switches on that date.) 17072742Swollman 17082742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17092742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 17102742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 17112742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 17122742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 17132742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 17142742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 17152742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 17162742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 17172742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 17182742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 17192742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 17202742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 17212742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 17222742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 17232742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 17242742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 17252742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 17262742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 172730711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 17282742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 17292742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 17302742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 173143014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 173220094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 173343014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 173443014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 173558787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 173643014SwollmanRule Cuba 1998 max - Oct lastSun 0:00s 0 S 173758787SruRule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D 17382742Swollman 17392742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17402742SwollmanZone America/Havana -5:29:28 - LMT 1890 174158787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 17422742Swollman -5:00 Cuba C%sT 17432742Swollman 17442742Swollman# Dominica 17452742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17462742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 17472742Swollman -4:00 - AST 17482742Swollman 17492742Swollman# Dominican Republic 175075267Swollman 175175267Swollman# From Steffen Thorsen (2000-10-30): 175275267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 175375267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 175475267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 175575267Swollman 175675267Swollman# From Paul Eggert (2000-12-04): 175775267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 175875267Swollman 175975267Swollman# From Rives McDow (2000-12-01): 176075267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 176175267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 176275267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 176375267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 176475267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 176575267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 176675267Swollman# decided to revert. 176775267Swollman 176875267Swollman 17692742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17702742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 17712742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 17722742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 17732742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 17742742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 17752742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 17762742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17772742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 17782742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 17792742Swollman -5:00 DR E%sT 1974 Oct 27 178075267Swollman -4:00 - AST 2000 Oct 29 02:00 178175267Swollman -5:00 US E%sT 2000 Dec 3 01:00 17822742Swollman -4:00 - AST 17832742Swollman 17842742Swollman# El Salvador 17852742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17862742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 17872742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 1788121098Swollman# There are too many San Salvadors elsewhere, so use America/El_Salvador 1789121098Swollman# instead of America/San_Salvador. 17902742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17912742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 17922742Swollman -6:00 Salv C%sT 17932742Swollman 17942742Swollman# Grenada 17952742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 179619878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 17972742Swollman -4:00 - AST 17982742Swollman 17992742Swollman# Guadeloupe 18002742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18012742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 18022742Swollman -4:00 - AST 18032742Swollman 18042742Swollman# Guatemala 18052742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18062742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 18072742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 18082742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 18092742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 181020094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 181120094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 18122742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18132742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 18142742Swollman -6:00 Guat C%sT 18152742Swollman 18162742Swollman# Haiti 18172742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18182742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 18192742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 18202742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 182158787Sru# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA. 182243014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 182343014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 18242742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18252742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 18262742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 18272742Swollman -5:00 Haiti E%sT 18282742Swollman 18292742Swollman# Honduras 18302742Swollman# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1. 18312742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18322742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 18332742Swollman -6:00 Salv C%sT 183443543Swollman# 183543543Swollman# Great Swan I ceded by US to Honduras in 1972 18362742Swollman 18372742Swollman# Jamaica 18382742Swollman 183919878Swollman# From Bob Devine (1988-01-28): 18402742Swollman# Follows US rules. 18412742Swollman 184219878Swollman# From U. S. Naval Observatory (1989-01-19): 18432742Swollman# JAMAICA 5 H BEHIND UTC 18442742Swollman 184558787Sru# From Shanks: 18462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18472742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 184843014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 184958787Sru -5:00 - EST 1974 Apr 28 2:00 185020094Swollman -5:00 US E%sT 1984 185120094Swollman -5:00 - EST 18522742Swollman 18532742Swollman# Martinique 18542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18552742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 185686222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 18572742Swollman -4:00 - AST 1980 Apr 6 18582742Swollman -4:00 1:00 ADT 1980 Sep 28 18592742Swollman -4:00 - AST 18602742Swollman 18612742Swollman# Montserrat 186230711Swollman# From Paul Eggert (1997-08-31): 186330711Swollman# Recent volcanic eruptions have forced evacuation of Plymouth, the capital. 186430711Swollman# Luckily, Olveston, the current de facto capital, has the same longitude. 18652742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 186630711SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston 18672742Swollman -4:00 - AST 18682742Swollman 18692742Swollman# Nicaragua 187043543Swollman# 187143543Swollman# From Steffen Thorsen (1998-12-29): 187243543Swollman# Nicaragua seems to be back at -6:00 but I have not been able to find when 187343543Swollman# they changed from -5:00. 187443543Swollman# 18752742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 18762742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 18772742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 187820094SwollmanRule Nic 1992 only - Jan 1 4:00 1:00 D 187920094SwollmanRule Nic 1992 only - Sep 24 0:00 0 S 18802742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18812742SwollmanZone America/Managua -5:45:08 - LMT 1890 188286222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 18832742Swollman -6:00 - CST 1973 May 18842742Swollman -5:00 - EST 1975 Feb 16 188520094Swollman -6:00 Nic C%sT 1993 Jan 1 4:00 188643543Swollman -5:00 - EST 1998 Dec 188743543Swollman -6:00 - CST 18882742Swollman 18892742Swollman# Panama 18902742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 18912742SwollmanZone America/Panama -5:18:08 - LMT 1890 189286222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 18932742Swollman -5:00 - EST 18942742Swollman 18952742Swollman# Puerto Rico 18962742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 18972742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 189814343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 18992742Swollman -4:00 - AST 1942 May 3 190014343Swollman -4:00 1:00 AWT 1945 Sep 30 2:00 19012742Swollman -4:00 - AST 19022742Swollman 19032742Swollman# St Kitts-Nevis 19042742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19052742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 19062742Swollman -4:00 - AST 19072742Swollman 19082742Swollman# St Lucia 19092742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19102742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 191186222Swollman -4:04:00 - CMT 1912 # Castries Mean Time 19122742Swollman -4:00 - AST 19132742Swollman 19142742Swollman# St Pierre and Miquelon 19152742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 19162742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19172742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 19182742Swollman -4:00 - AST 1980 May 1919121098Swollman -3:00 - PMST 1987 # Pierre & Miquelon Time 1920121098Swollman -3:00 Canada PM%sT 19212742Swollman 19222742Swollman# St Vincent and the Grenadines 19232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19242742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 192543014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 19262742Swollman -4:00 - AST 19272742Swollman 19282742Swollman# Turks and Caicos 192943014Swollman# From Paul Eggert (1998-08-06): 193043014Swollman# Shanks says they use US DST rules, but IATA SSIM (1991/1998) 193120094Swollman# says they switch at midnight. Go with IATA SSIM. 193220094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 193320094SwollmanRule TC 1979 1986 - Apr lastSun 0:00 1:00 D 193420094SwollmanRule TC 1979 max - Oct lastSun 0:00 0 S 193520094SwollmanRule TC 1987 max - Apr Sun>=1 0:00 1:00 D 19362742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 19372742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 193843014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 193920094Swollman -5:00 TC E%sT 19408029Swollman 194114343Swollman# British Virgin Is 19422742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 194314343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 19442742Swollman -4:00 - AST 19458029Swollman 194614343Swollman# Virgin Is 194714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 194814343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 194914343Swollman -4:00 - AST 1950