northamerica revision 86222
186222Swollman# @(#)northamerica 7.60 22742Swollman# also includes Central America and the Caribbean 32742Swollman 464499Swollman# $FreeBSD: head/share/zoneinfo/northamerica 86222 2001-11-09 19:17:59Z wollman $ 564499Swollman 62742Swollman# This data is by no means authoritative; if you think you know better, 72742Swollman# go ahead and edit the file (and please send any changes to 82742Swollman# tz@elsie.nci.nih.gov for general use in the future). 92742Swollman 1058787Sru# From Paul Eggert <eggert@twinsun.com> (1999-03-22): 112742Swollman# A reliable and entertaining source about time zones is 1258787Sru# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). 132742Swollman 142742Swollman############################################################################### 152742Swollman 162742Swollman# United States 172742Swollman 1858787Sru# From Paul Eggert (1999-03-31): 1958787Sru# Howse writes (pp 121-125) that time zones were invented by 2058787Sru# Professor Charles Ferdinand Dowd (1825-1904), 2158787Sru# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). 2258787Sru# His pamphlet ``A System of National Time for Railroads'' (1870) 2358787Sru# was the result of his proposals at the Convention of Railroad Trunk Lines 2458787Sru# in New York City (1869-10). His 1870 proposal was based on Washington, DC, 2558787Sru# but in 1872-05 he moved the proposed origin to Greenwich. 2658787Sru# His proposal was adopted by the railroads on 1883-11-18 at 12:00, 2758787Sru# and the most of the country soon followed suit. 2858787Sru 2914343Swollman# From Paul Eggert <eggert@twinsun.com> (1995-12-19): 3014343Swollman# A good source for time zone historical data in the US is 3114343Swollman# Thomas G. Shanks, The American Atlas (5th edition), 3214343Swollman# San Diego: ACS Publications, Inc. (1991). 3314343Swollman# Make sure you have the errata sheet; the book is somewhat useless without it. 3414343Swollman# It is the source for the US and Puerto Rico entries below. 3514343Swollman 3675267Swollman# From Paul Eggert (2001-03-06): 3717200Swollman# Daylight Saving Time was first suggested as a joke by Benjamin Franklin 3875267Swollman# in his whimsical essay ``An Economical Project for Diminishing the Cost 3975267Swollman# of Light'' published in the Journal de Paris (1784-04-26). 4017200Swollman# Not everyone is happy with the results: 4117200Swollman# 4217200Swollman# I don't really care how time is reckoned so long as there is some 4317200Swollman# agreement about it, but I object to being told that I am saving 4417200Swollman# daylight when my reason tells me that I am doing nothing of the kind. 4517200Swollman# I even object to the implication that I am wasting something 4617200Swollman# valuable if I stay in bed after the sun has risen. As an admirer 4717200Swollman# of moonlight I resent the bossy insistence of those who want to 4817200Swollman# reduce my time for enjoying it. At the back of the Daylight Saving 4917200Swollman# scheme I detect the bony, blue-fingered hand of Puritanism, eager 5017200Swollman# to push people into bed earlier, and get them up earlier, to make 5117200Swollman# them healthy, wealthy and wise in spite of themselves. 5217200Swollman# 5317200Swollman# -- Robertson Davies, The Diary of Samuel Marchbanks (1947), XIX, Sunday 5475267Swollman# 5575267Swollman# For more about the first ten years of DST in the United States, see 5675267Swollman# Robert Garland's <a href="http://www.clpgh.org/exhibit/dst.html"> 5775267Swollman# Ten years of daylight saving from the Pittsburgh standpoint 5875267Swollman# (Carnegie Library of Pittsburgh, 1927)</a>. 5975267Swollman# 6075267Swollman# Shanks says that DST was called "War Time" in the US in 1918 and 1919. 6175267Swollman# However, DST was imposed by the Standard Time Act of 1918, which 6275267Swollman# was the first nationwide legal time standard, and apparently 6375267Swollman# time was just called "Standard Time" or "Daylight Saving Time". 6417200Swollman 652742Swollman# From Arthur David Olson: 662742Swollman# US Daylight Saving Time ended on the last Sunday of *October* in 1974. 6719878Swollman# See, for example, the front page of the Saturday, 1974-10-26 6819878Swollman# and Sunday, 1974-10-27 editions of the Washington Post. 692742Swollman 702742Swollman# From Arthur David Olson: 712742Swollman# Before the Uniform Time Act of 1966 took effect in 1967, observance of 722742Swollman# Daylight Saving Time in the US was by local option, except during wartime. 732742Swollman 7467578Swollman# From Arthur David Olson (2000-09-25): 7567578Swollman# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. 7667578Swollman# In the introduction, Oboler spoke of "Eastern Peace Time." 7767578Swollman# An AltaVista search turned up 7867578Swollman# <a href="http://rowayton.org/rhs/hstaug45.html">: 7967578Swollman# "When the time is announced over the radio now, it is 'Eastern Peace 8067578Swollman# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." 8167578Swollman# </a> (August 1945) by way of confirmation. 8267578Swollman 8367578Swollman# From Joseph Gallant <notquite@hotmail.com>, citing 8467578Swollman# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): 8567578Swollman# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set 8686222Swollman# to switch to London for Attlee's address, but the American people 8767578Swollman# never got to hear his speech live. According to one press account, 8867578Swollman# CBS' Bob Trout was first to announce the word of Japan's surrender, 8967578Swollman# but a few seconds later, NBC, ABC and Mutual also flashed the word 9067578Swollman# of surrender, all of whom interrupting the bells of Big Ben in 9186222Swollman# London which were to precede Mr. Attlee's speech. 9267578Swollman 932742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 9475267SwollmanRule US 1918 1919 - Mar lastSun 2:00 1:00 D 952742SwollmanRule US 1918 1919 - Oct lastSun 2:00 0 S 962742SwollmanRule US 1942 only - Feb 9 2:00 1:00 W # War 9767578SwollmanRule US 1945 only - Aug 14 23:00u 1:00 P # Peace 982742SwollmanRule US 1945 only - Sep 30 2:00 0 S 992742SwollmanRule US 1967 max - Oct lastSun 2:00 0 S 1002742SwollmanRule US 1967 1973 - Apr lastSun 2:00 1:00 D 1012742SwollmanRule US 1974 only - Jan 6 2:00 1:00 D 1022742SwollmanRule US 1975 only - Feb 23 2:00 1:00 D 1032742SwollmanRule US 1976 1986 - Apr lastSun 2:00 1:00 D 1042742SwollmanRule US 1987 max - Apr Sun>=1 2:00 1:00 D 10543543Swollman# <a href="http://thomas.loc.gov/cgi-bin/bdquery/z?d106:h.r.00177:"> 10643543Swollman# H.R.177 10743543Swollman# </a> (introduced 1999-01-06) would change April to March in the above rule. 1082742Swollman 10919878Swollman# From Bob Devine (1988-01-28): 1102742Swollman# ...Alaska (and Hawaii) had the timezone names changed in 1967. 1112742Swollman# old new 1122742Swollman# Pacific Standard Time(PST) -same- 1132742Swollman# Yukon Standard Time(YST) -same- 1142742Swollman# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) 1152742Swollman# Nome Standard Time (NT) Bering Standard Time (BST) 1162742Swollman# 1172742Swollman# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. 1182742Swollman# The YST zone now covers nearly all of the state, AHST just part 1192742Swollman# of the Aleutian islands. No DST. 1202742Swollman 12114343Swollman# From Paul Eggert (1995-12-19): 12214343Swollman# The tables below use `NST', not `NT', for Nome Standard Time. 12314343Swollman# I invented `CAWT' for Central Alaska War Time. 12414343Swollman 12519878Swollman# From U. S. Naval Observatory (1989-01-19): 1262742Swollman# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON 1272742Swollman# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 1282742Swollman# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON 1292742Swollman# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 1302742Swollman# USA MOUNTAIN 7 H BEHIND UTC DENVER 1312742Swollman# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 1322742Swollman# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO 1332742Swollman# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 1342742Swollman# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) 1352742Swollman# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) 1362742Swollman# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W 1372742Swollman# USA - " - 9 H BEHIND UTC APR 3 - OCT 30 1382742Swollman# USA HAWAII 10 H BEHIND UTC 1392742Swollman# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY 1402742Swollman 14119878Swollman# From Arthur David Olson (1989-01-21): 1422742Swollman# The above dates are for 1988. 1432742Swollman# Note the "AKST" and "AKDT" abbreviations, the claim that there's 1442742Swollman# no DST in Samoa, and the claim that there is DST in Alaska and the 1452742Swollman# Aleutians. 1462742Swollman 14719878Swollman# From Arthur David Olson (1988-02-13): 1482742Swollman# Legal standard time zone names, from United States Code (1982 Edition and 1492742Swollman# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names 15019878Swollman# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 1512742Swollman# took effect), as explained in sections 263 and 261: 1522742Swollman# (none) 1532742Swollman# United States standard eastern time 1542742Swollman# United States standard mountain time 1552742Swollman# United States standard central time 1562742Swollman# United States standard Pacific time 1572742Swollman# (none) 1582742Swollman# United States standard Alaska time 1592742Swollman# (none) 16019878Swollman# Next, names from 1967-04-01 until 1983-11-30 (the date for 1612742Swollman# public law 98-181): 1622742Swollman# Atlantic standard time 1632742Swollman# eastern standard time 1642742Swollman# central standard time 1652742Swollman# mountain standard time 1662742Swollman# Pacific standard time 1672742Swollman# Yukon standard time 1682742Swollman# Alaska-Hawaii standard time 1692742Swollman# Bering standard time 17019878Swollman# And after 1983-11-30: 1712742Swollman# Atlantic standard time 1722742Swollman# eastern standard time 1732742Swollman# central standard time 1742742Swollman# mountain standard time 1752742Swollman# Pacific standard time 1762742Swollman# Alaska standard time 1772742Swollman# Hawaii-Aleutian standard time 1782742Swollman# Samoa standard time 1792742Swollman# The law doesn't give abbreviations. 18014343Swollman# 18114343Swollman# From Paul Eggert (1995-12-19): 18214343Swollman# Shanks uses 1983-10-30, not 1983-11-30, for the 1983 transitions. 18314343Swollman# Go with Shanks. 18475267Swollman# 18575267Swollman# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: 18675267Swollman# Public law 106-564 (2000-12-23) introduced the abbreviation 18775267Swollman# "Chamorro Standard Time" for time in Guam and the Northern Marianas. 18875267Swollman# See the file "australasia". 1892742Swollman 19086222Swollman# US eastern time, represented by New York 19175267Swollman 19267578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 19367578Swollman# Georgia, far southeastern Indiana, eastern Kentucky, Maine, 19467578Swollman# Maryland, Massachusetts, New Hampshire, New Jersey, New York, North 19567578Swollman# Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern 19667578Swollman# Tennessee, Vermont, Virginia, West Virginia 19767578Swollman 19814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 19914343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 20014343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 20114343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 20214343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 20314343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 20414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 20514343SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00 20614343Swollman -5:00 US E%sT 1920 20714343Swollman -5:00 NYC E%sT 1942 20814343Swollman -5:00 US E%sT 1946 20914343Swollman -5:00 NYC E%sT 1967 21014343Swollman -5:00 US E%sT 2112742Swollman 21286222Swollman# US central time, represented by Chicago 21367578Swollman 21467578Swollman# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana 21567578Swollman# corners, Iowa, most of Kansas, western Kentucky, Louisiana, 21667578Swollman# Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North 21767578Swollman# Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of 21867578Swollman# Texas, Wisconsin 21967578Swollman 22014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 22114343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 22214343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 22314343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 22414343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 22514343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 22614343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 22714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 22814343SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 22914343Swollman -6:00 US C%sT 1920 23014343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 23114343Swollman -5:00 - EST 1936 Nov 15 2:00 23214343Swollman -6:00 Chicago C%sT 1942 23314343Swollman -6:00 US C%sT 1946 23414343Swollman -6:00 Chicago C%sT 1967 23514343Swollman -6:00 US C%sT 23686222Swollman# Oliver County, ND switched from mountain to central time on 1992-10-25. 23786222SwollmanZone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:00 23886222Swollman -7:00 US M%sT 1992 Oct 25 02:00 23986222Swollman -6:00 US C%sT 2402742Swollman 24186222Swollman# US mountain time, represented by Denver 24267578Swollman# 24367578Swollman# Colorado, southern Idaho, far western Kansas, Montana, western 24486222Swollman# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), 24586222Swollman# New Mexico, southwestern North Dakota, far eastern Oregon, 24675267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 24775267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 24867578Swollman# 24914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 25014343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 25114343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 25214343SwollmanRule Denver 1921 only - May 22 2:00 0 S 25314343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 25414343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 2552742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25614343SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00 25715309Swollman -7:00 US M%sT 1920 25815309Swollman -7:00 Denver M%sT 1942 25915309Swollman -7:00 US M%sT 1946 26015309Swollman -7:00 Denver M%sT 1967 26115309Swollman -7:00 US M%sT 2622742Swollman 26314343Swollman# US Pacific time, represented by Los Angeles 26467578Swollman# 26586222Swollman# California, northern Idaho, most of Nevada, most of Oregon, and Washington 26667578Swollman# 26714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 26814343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 26914343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 27014343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 27114343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 27214343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 27314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27414343SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00 27514343Swollman -8:00 US P%sT 1946 27614343Swollman -8:00 CA P%sT 1967 27714343Swollman -8:00 US P%sT 2788029Swollman 27914343Swollman# Alaska 28014343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 28114343Swollman# 28286222Swollman# From Paul Eggert (2001-05-30): 28314343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 28419878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 28575267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 28675267Swollman# also a Friday. Include only the time zone part of this transition, 28775267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 28875267Swollman# the Julian calendar. 28914343Swollman# 29086222Swollman# As far as we know, none of the exact locations mentioned below were 29186222Swollman# permanently inhabited in 1867 by anyone using either calendar. 29286222Swollman# (Yakutat was colonized by the Russians in 1799, but the settlement 29386222Swollman# was destroyed in 1805 by a Yakutat-kon war party.) However, there 29486222Swollman# were nearby inhabitants in some cases and for our purposes perhaps 29586222Swollman# it's best to simply use the official transition. 29686222Swollman# 29714343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29875267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 29975267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 30014343Swollman -8:00 - PST 1942 30114343Swollman -8:00 US P%sT 1946 30214343Swollman -8:00 - PST 1969 30314343Swollman -8:00 US P%sT 1983 Oct 30 2:00 30414343Swollman -9:00 US AK%sT 30575267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 30675267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 30714343Swollman -9:00 - YST 1942 30814343Swollman -9:00 US Y%sT 1946 30914343Swollman -9:00 - YST 1969 31014343Swollman -9:00 US Y%sT 1983 Oct 30 2:00 31114343Swollman -9:00 US AK%sT 31275267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 31375267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 31414343Swollman -10:00 - CAT 1942 31514343Swollman -10:00 US CAT/CAWT 1946 31614343Swollman -10:00 - CAT 1967 Apr 31714343Swollman -10:00 - AHST 1969 31814343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 31914343Swollman -9:00 US AK%sT 32075267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 32175267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 32214343Swollman -11:00 - NST 1942 32314343Swollman -11:00 US N%sT 1946 32414343Swollman -11:00 - NST 1967 Apr 32514343Swollman -11:00 - BST 1969 32614343Swollman -11:00 US B%sT 1983 Oct 30 2:00 32714343Swollman -9:00 US AK%sT 32875267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 32975267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 33014343Swollman -11:00 - NST 1942 33114343Swollman -11:00 US N%sT 1946 33214343Swollman -11:00 - NST 1967 Apr 33314343Swollman -11:00 - BST 1969 33414343Swollman -11:00 US B%sT 1983 Oct 30 2:00 33514343Swollman -10:00 US HA%sT 33614343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 33714343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 33814343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 33914343Swollman# These switches don't quite make our 1970 cutoff. 3402742Swollman 34114343Swollman# Hawaii 34214343Swollman# 34314343Swollman# From Arthur David Olson: 34414343Swollman# And then there's Hawaii. 34514343Swollman# DST was observed for one day in 1933; 34614343Swollman# standard time was changed by half an hour in 1947; 34714343Swollman# it's always standard as of 1986. 34814343Swollman# 34914343Swollman# From Paul Eggert: 35014343Swollman# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 35114343Swollman# 35214343SwollmanZone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 35314343Swollman -10:30 - HST 1933 Apr 30 2:00 35414343Swollman -10:30 1:00 HDT 1933 May 21 2:00 35514343Swollman -10:30 US H%sT 1947 Jun 8 2:00 35614343Swollman -10:00 - HST 3572742Swollman 35814343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 35914343Swollman 36014343Swollman# Arizona mostly uses MST. 36114343SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00 36214343Swollman -7:00 US M%sT 1944 Jan 1 00:01 36314343Swollman -7:00 - MST 1944 Mar 17 00:01 36414343Swollman -7:00 US M%sT 1944 Oct 1 00:01 36514343Swollman -7:00 - MST 1967 36614343Swollman -7:00 US M%sT 1968 36714343Swollman -7:00 - MST 36819878Swollman# From Arthur David Olson (1988-02-13): 36914343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 3702742Swollman# notes in private correspondence dated 12/28/87 that "Presently, only the 3712742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 3722742Swollman# large size and location in three states." (The "only" means that other 3732742Swollman# tribal nations don't use DST.) 3742742Swollman 37514343SwollmanLink America/Denver America/Shiprock 3762742Swollman 37714343Swollman# Southern Idaho and eastern Oregon switched four weeks late in 1974. 37814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 37914343SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 38014343Swollman -8:00 US P%sT 1923 May 13 2:00 38114343Swollman -7:00 US M%sT 1974 38214343Swollman -7:00 - MST 1974 Feb 3 2:00 38314343Swollman -7:00 US M%sT 3842742Swollman 38514343Swollman# Indiana 38614343Swollman# 38758787Sru# For a map of Indiana's time zone regions, see: 38858787Sru# <a href="http://www.mccsc.edu/time.html"> 38958787Sru# What time is it in Indiana? 39058787Sru# </a> (1999-04-06) 39158787Sru# 39214343Swollman# From Paul Eggert (1995-12-19): 39314343Swollman# Indiana generally observes either EST all year, or CST/CDT, 39414343Swollman# but areas near Cincinnati and Louisville use those cities' timekeeping 39514343Swollman# and in 1969 and 1970 the whole state observed daylight time; 39614343Swollman# and there are other exceptions as noted below. 39714343Swollman# Shanks partitions Indiana into 345 regions, each with its own time history, 39814343Swollman# and writes ``Even newspaper reports present contradictory information.'' 39914343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 40014343Swollman# 40114343Swollman# Since 1970, EST-only Indiana has been like America/Indianapolis, 40214343Swollman# with exceptions noted below for Crawford, Starke, and Switzerland counties. 40314343Swollman# The parts of Indiana not listed below have been like America/Chicago, 40414343Swollman# America/Louisville, or America/New_York. 40514343Swollman# 40614343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 40714343Swollman# that they would be ambiguous if we left them at the `America' level. 40814343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 40914343Swollman# 41014343Swollman# Most of EST-only Indiana last observed DST in 1970. 41175267Swollman 41275267Swollman# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn: 41375267Swollman# Pam Belluck reported in the New York Times (2001-01-31) that the 41475267Swollman# Indiana Legislature is considering a bill to adopt DST statewide. 41575267Swollman# Her article mentioned Vevay, whose post office observes a different 41686222Swollman# time zone from Danner's Hardware across the street. 41775267Swollman 41814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 41914343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 42014343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 42114343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 42214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 42314343SwollmanZone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00 42414343Swollman -6:00 US C%sT 1920 42514343Swollman -6:00 Indianapolis C%sT 1942 42614343Swollman -6:00 US C%sT 1946 42714343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 42814343Swollman -5:00 - EST 1957 Sep 29 2:00 42914343Swollman -6:00 - CST 1958 Apr 27 2:00 43014343Swollman -5:00 - EST 1969 43114343Swollman -5:00 US E%sT 1971 43214343Swollman -5:00 - EST 43314343SwollmanLink America/Indianapolis America/Indiana/Indianapolis 4342742Swollman# 43514343Swollman# Part of Crawford County, Indiana, last observed DST in 1975, 43614343Swollman# and left its clocks alone in 1974. 43714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 43814343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 43914343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 44014343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 44114343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 44214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 44314343SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00 44414343Swollman -6:00 US C%sT 1951 44514343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 44614343Swollman -5:00 - EST 1969 44714343Swollman -5:00 US E%sT 1974 Jan 6 2:00 44814343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 44914343Swollman -5:00 US E%sT 1976 45014343Swollman -5:00 - EST 45114343Swollman# 45214343Swollman# Starke County, Indiana 45319878Swollman# From Arthur David Olson (1991-10-28): 45419878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 45514343Swollman# notes that Starke County switched from Central time to Eastern time as of 45619878Swollman# 1991-10-27. 45714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 45814343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 45914343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 46014343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 46114343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 46214343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 46314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 46414343SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00 46514343Swollman -6:00 US C%sT 1947 46614343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 46714343Swollman -5:00 - EST 1963 Oct 27 2:00 46814343Swollman -6:00 US C%sT 1991 Oct 27 2:00 46914343Swollman -5:00 - EST 47014343Swollman# 47114343Swollman# Switzerland County, Indiana, last observed DST in 1972. 47214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 47314343SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00 47414343Swollman -6:00 US C%sT 1954 Apr 25 2:00 47514343Swollman -5:00 - EST 1969 47614343Swollman -5:00 US E%sT 1973 47714343Swollman -5:00 - EST 4782742Swollman 47914343Swollman# Part of Kentucky left its clocks alone in 1974. 48067578Swollman# This also includes a part of Indiana immediately adjacent to Louisville. 48114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 48214343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 48314343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 48414343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 48514343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 48614343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 48714343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 48814343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 48914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 49014343SwollmanZone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 49114343Swollman -6:00 US C%sT 1921 49214343Swollman -6:00 Louisville C%sT 1942 49314343Swollman -6:00 US C%sT 1946 49414343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 49514343Swollman -5:00 - EST 1968 49614343Swollman -5:00 US E%sT 1974 Jan 6 2:00 49714343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 49814343Swollman -5:00 US E%sT 49967578SwollmanLink America/Louisville America/Kentucky/Louisville 50067578Swollman# 50158787Sru# Wayne, Clinton, and Russell Counties, Kentucky 50258787Sru# 50358787Sru# From 50458787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 50558787Sru# Lake Cumberland LIFE 50658787Sru# </a> (1999-01-29) via WKYM-101.7: 50758787Sru# Clinton County has joined Wayne County in asking the DoT to change from 50858787Sru# the Central to the Eastern time zone.... The Wayne County government made 50958787Sru# the same request in December. And while Russell County officials have not 51058787Sru# taken action, the majority of respondents to a poll conducted there in 51158787Sru# August indicated they would like to change to "fast time" also. 51258787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 51358787Sru# location in the Central time zone. 51467578Swollman# 51567578Swollman# From Rich Wales (2000-08-29): 51667578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 51767578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 51875267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 51975267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 52086222Swollman# 52186222Swollman# From Paul Eggert (2001-07-16): 52286222Swollman# The final rule was published in the 52386222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22"> 52486222Swollman# Federal Register 65, 160 (2000-08-17), page 50154-50158. 52586222Swollman# </a> 52686222Swollman# 52767578SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 52867578Swollman -6:00 US C%sT 1946 52967578Swollman -6:00 - CST 1968 53067578Swollman -6:00 US C%sT 2000 Oct 29 2:00 53167578Swollman -5:00 US E%sT 5322742Swollman 53367578Swollman 53467578Swollman# From Rives McDow (2000-08-30): 53567578Swollman# Here ... are all the changes in the US since 1985. 53667578Swollman# Kearny County, KS (put all of county on central; 53767578Swollman# previously split between MST and CST) ... 1990-10 53867578Swollman# Starke County, IN (from CST to EST) ... 1991-10 53967578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 54067578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 54167578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 54267578Swollman# 54386222Swollman# From Paul Eggert (2001-07-17): 54486222Swollman# We don't know where the line used to be within Kearny County, KS, 54586222Swollman# so omit that change for now. 54686222Swollman# See America/Indiana/Knox for the Starke County, IN change. 54786222Swollman# See America/North_Dakota/Center for the Oliver County, ND change. 54886222Swollman# West Wendover, NV officially switched from Pacific to mountain time on 54986222Swollman# 1999-10-31. See the 55086222Swollman# <a href="http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15"> 55186222Swollman# Federal Register 64, 203 (1999-10-21), page 56705-56707. 55286222Swollman# </a> 55386222Swollman# However, the Federal Register says that West Wendover already operated 55486222Swollman# on mountain time, and the rule merely made this official; 55586222Swollman# hence a separate tz entry is not needed. 55667578Swollman 55714343Swollman# Michigan 55814343Swollman# 55919878Swollman# From Bob Devine (1988-01-28): 56014343Swollman# Michigan didn't observe DST from 1968 to 1973. 56114343Swollman# 56258787Sru# From Paul Eggert (1999-03-31): 56358787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 56458787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 56558787Sru# that Detroit kept 56614343Swollman# 56714343Swollman# local time until 1900 when the City Council decreed that clocks should 56814343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 56914343Swollman# city obeyed, half refused. After considerable debate, the decision 57014343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 57114343Swollman# erect a sundial in front of the city hall was referred to the 57214343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 57314343Swollman# by city vote. 57414343Swollman# 57514343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 57614343Swollman# 57775267Swollman# From Paul Eggert (2001-03-06): 57875267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 57975267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 58075267Swollman# info, so omit this for now. 58175267Swollman# 58214343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 58314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 58414343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 58514343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 58614343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 58714343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 58814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 58914343SwollmanZone America/Detroit -5:32:11 - LMT 1905 59014343Swollman -6:00 - CST 1915 May 15 2:00 59114343Swollman -5:00 - EST 1942 59214343Swollman -5:00 US E%sT 1946 59314343Swollman -5:00 Detroit E%sT 1973 59414343Swollman -5:00 US E%sT 1975 59514343Swollman -5:00 - EST 1975 Apr 27 2:00 59614343Swollman -5:00 US E%sT 59714343Swollman# 59814343Swollman# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973. 59914343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 60014343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 60114343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 60214343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 60314343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 60414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 60514343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 60614343Swollman -6:00 US C%sT 1946 60714343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 60814343Swollman -5:00 - EST 1973 Apr 29 2:00 60914343Swollman -6:00 US C%sT 61014343Swollman 6112742Swollman# Navassa 61286222Swollman# administered by the US Fish and Wildlife Service 61343543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 61443543Swollman# also claimed by Haiti 61543543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 61686222Swollman# US lighthouse 1917/1996-09 61743543Swollman# currently uninhabited 61843543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 61943543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 62043543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 62114343Swollman 62219878Swollman# Old names, for S5 users 62319878Swollman 62419878Swollman# Link LINK-FROM LINK-TO 62519878SwollmanLink America/New_York EST5EDT 62619878SwollmanLink America/Chicago CST6CDT 62719878SwollmanLink America/Denver MST7MDT 62819878SwollmanLink America/Los_Angeles PST8PDT 62919878SwollmanLink America/Indianapolis EST 63019878SwollmanLink America/Phoenix MST 63119878SwollmanLink Pacific/Honolulu HST 63219878Swollman 6332742Swollman################################################################################ 6342742Swollman 6352742Swollman 63658787Sru# From Paul Eggert <eggert@twinsun.com> (1999-10-29): 63714343Swollman# A good source for time zone historical data outside the US is 63858787Sru# Thomas G. Shanks, The International Atlas (5th edition), 63958787Sru# San Diego: ACS Publications, Inc. (1999). 6402742Swollman# 64186222Swollman# Gwillim Law writes that a good source 64220094Swollman# for recent time zone data is the International Air Transport 64320094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 64420094Swollman# published semiannually. Law sent in several helpful summaries 64520094Swollman# of the IATA's data after 1990. 64620094Swollman# 64720094Swollman# Except where otherwise noted, Shanks is the source for entries through 1990, 64820094Swollman# and IATA SSIM is the source for entries after 1990. 64920094Swollman# 6502742Swollman# Another source occasionally used is Edward W. Whitman, World Time Differences, 6512742Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which 6522742Swollman# I found in the UCLA library. 6532742Swollman# 6549908Swollman# See the `europe' file for Greenland. 6552742Swollman 6562742Swollman# Canada 6572742Swollman 6589908Swollman# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14): 6599908Swollman# I post here the time zone abbreviations standardized in Canada 6609908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 6619908Swollman# 6629908Swollman# UTC Standard time Daylight savings time 6639908Swollman# offset French English French English 6649908Swollman# -2:30 - - HAT NDT 6659908Swollman# -3 - - HAA ADT 6669908Swollman# -3:30 HNT NST - - 6679908Swollman# -4 HNA AST HAE EDT 6689908Swollman# -5 HNE EST HAC CDT 6699908Swollman# -6 HNC CST HAR MDT 6709908Swollman# -7 HNR MST HAP PDT 6719908Swollman# -8 HNP PST HAY YDT 6729908Swollman# -9 HNY YST - - 6739908Swollman# 6749908Swollman# HN: Heure Normale ST: Standard Time 6759908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 6769908Swollman# 6779908Swollman# A: de l'Atlantique Atlantic 6789908Swollman# C: du Centre Central 6799908Swollman# E: de l'Est Eastern 6809908Swollman# M: Mountain 6819908Swollman# N: Newfoundland 6829908Swollman# P: du Pacifique Pacific 6839908Swollman# R: des Rocheuses 6849908Swollman# T: de Terre-Neuve 6859908Swollman# Y: du Yukon Yukon 6869908Swollman# 6879908Swollman# From Paul Eggert <eggert@twinsun.com> (1994-11-22): 6889908Swollman# Alas, this sort of thing must be handled by localization software. 6892742Swollman 69067578Swollman# Unless otherwise specified, the data for Canada are all from Shanks. 6919908Swollman 69267578Swollman# From Paul Eggert (2000-10-02): 69367578Swollman# H. David Matthews and Mary Vincent's map 69467578Swollman# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm"> 69567578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 69667578Swollman# </a> contains detailed boundaries for regions observing nonstandard 69767578Swollman# time and daylight saving time arrangements in Canada circa 1998. 69867578Swollman# 69967578Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has 70067578Swollman# <a href="http://www.nrc.ca/inms/time/tze.html"> 70167578Swollman# information about standard and daylight saving time zones in Canada. 70267578Swollman# </a> (updated periodically). 70367578Swollman# Its unofficial information is often taken from Matthews and Vincent. 7049908Swollman 7052742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 70617200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 70717200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 70875267SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W 70917200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 71017200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 71117200SwollmanRule Canada 1974 max - Oct lastSun 2:00 0 S 71217200SwollmanRule Canada 1987 max - Apr Sun>=1 2:00 1:00 D 71317200Swollman 71417200Swollman 71567578Swollman# Newfoundland (and far southeast Labrador) 71617200Swollman 71767578Swollman# From Paul Eggert (2000-10-02): 71867578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 71967578Swollman# but the only part of Labrador that follows the rules is the 72067578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 72167578Swollman# but excluding, say, Black Tickle. 72267578Swollman 72317200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 7242742SwollmanRule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D 7252742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 7262742SwollmanRule StJohns 1918 only - Oct 31 2:00 0 S 7272742Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. 7282742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 7292742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 7302742Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks. 7312742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 7322742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 7332742Swollman# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman. 7342742SwollmanRule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D 7352742SwollmanRule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S 7362742Swollman# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman. 73775267SwollmanRule StJohns 1942 only - Mar 1 0:00 1:00 W 7382742SwollmanRule StJohns 1942 only - Dec 31 0:00 0 S 73975267SwollmanRule StJohns 1943 only - May 30 0:00 1:00 W 7402742SwollmanRule StJohns 1943 only - Sep 5 0:00 0 S 74175267SwollmanRule StJohns 1944 only - Jul 10 0:00 1:00 W 7422742SwollmanRule StJohns 1944 only - Sep 2 0:00 0 S 74375267SwollmanRule StJohns 1945 only - Jan 1 0:00 1:00 W 7442742SwollmanRule StJohns 1945 only - Oct 7 2:00 0 S 7452742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 7462742Swollman# Apr 30 - Sep 24; go with Shanks. 7472742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 7482742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 7492742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 7502742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 75167578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 75267578Swollman# From Paul Eggert (2000-10-02): 75367578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 75467578Swollman# at 00:01 local time. For now, assume it started in 1987. 75567578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 75667578SwollmanRule StJohns 1987 max - Oct lastSun 0:01 0 S 75767578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 75867578SwollmanRule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D 7592742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 7602742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 7612742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 76220094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 7632742Swollman -3:30 StJohns N%sT 7642742Swollman 7658029Swollman 76667578Swollman# most of east Labrador 76717200Swollman 76820094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 76920094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 77020094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 77120094Swollman -3:30:52 StJohns NST 1919 77220094Swollman -3:30:52 - NST 1935 Mar 30 77320094Swollman -3:30 - NST 1936 77420094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 77520094Swollman -4:00 StJohns A%sT 77620094Swollman 77720094Swollman 77820094Swollman# west Labrador, New Brunswick, Nova Scotia, Prince Edward I 77920094Swollman 78017200Swollman# From Paul Eggert (1996-06-12): 78117200Swollman# Shanks writes that since 1970 most of this region has been like Halifax. 78217200Swollman# Many locales did not observe peacetime DST until 1972; 78317200Swollman# Glace Bay, NS is the largest that we know of. 78417200Swollman# Shanks also writes that Liverpool, NS was the only town in Canada to observe 78517200Swollman# DST in 1971 but not 1970; for now we'll assume this is a typo. 78617200Swollman 78767578Swollman# From Paul Eggert (2000-10-02): 78867578Swollman# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches 78967578Swollman# at 00:01 local time. FIXME: verify and create a new Zone for this. 79067578Swollman 79167578Swollman 7922742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 7932742SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 7942742SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 7952742SwollmanRule Halifax 1918 only - Apr 14 2:00 1:00 D 7962742SwollmanRule Halifax 1918 only - Oct 31 2:00 0 S 7972742SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 7982742SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 7992742SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 8002742SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 8012742SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 8022742SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 8032742SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 8042742SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 8052742SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 8062742SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 8072742SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 8082742SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 8092742SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 8102742SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 8112742SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 8122742SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 8132742SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 8142742SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 8152742SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 8162742SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 8172742SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 8182742SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 8192742SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 8202742SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 8212742SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 8222742SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 8232742SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 8242742SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 8252742SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 8262742SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 82775267SwollmanRule Halifax 1942 only - Feb 9 2:00 1:00 W 8282742SwollmanRule Halifax 1945 1959 - Sep lastSun 2:00 0 S 8292742SwollmanRule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D 8302742SwollmanRule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D 8312742SwollmanRule Halifax 1962 max - Oct lastSun 2:00 0 S 8322742SwollmanRule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D 8332742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8342742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 8352742Swollman -4:00 Halifax A%sT 83617200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 83717200Swollman -4:00 Canada A%sT 1953 83817200Swollman -4:00 Halifax A%sT 1954 83917200Swollman -4:00 - AST 1972 84017200Swollman -4:00 Halifax A%sT 8412742Swollman 8428029Swollman 84317200Swollman# Ontario, Quebec 84417200Swollman 84517200Swollman# From Paul Eggert (1996-06-12): 84617200Swollman# Shanks writes that since 1970 most of this region has been like Montreal. 84717200Swollman# Thunder Bay skipped DST in 1973. 84817200Swollman# Many smaller locales did not observe peacetime DST until 1974; 84917200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 85017200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 85117200Swollman 85243014Swollman# From Paul Eggert (1997-10-17): 85343014Swollman# msb@sq.com writes that an article in the 1997-10-14 Toronto Star 85443014Swollman# says that Atikokan, Ontario currently does not observe DST, 85543014Swollman# but will vote on 11-10 whether to use EST/EDT. 85643014Swollman# He also writes that the 85743014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 85843014Swollman# Ontario Time Act (1990, Chapter T.9) 85943014Swollman# </a> 86043014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 86143014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 86243014Swollman# concerns a non-official time observed as a matter of local practice. 86358787Sru# For what it's worth, Shanks says that Atikokan has agreed with 86443014Swollman# Rainy River ever since standard time was introduced. 86543014Swollman 86667578Swollman# From Paul Eggert (2000-10-02): 86767578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 86867578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 86967578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 87067578Swollman# violation of the official Ontario rules. 87167578Swollman# They also write that Quebec east of the -63 meridian is supposed to 87267578Swollman# observe AST, but residents as far east as Natashquan use EST/EDT, 87367578Swollman# and residents east of Natashquan use AST. 87467578Swollman# We probably need Zones for far east Quebec and for Atikokan, 87567578Swollman# but we don't know when their practices started. 87667578Swollman 8772742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 8782742SwollmanRule Mont 1917 only - Mar 25 2:00 1:00 D 8792742SwollmanRule Mont 1917 only - Apr 24 0:00 0 S 8802742SwollmanRule Mont 1918 only - Apr 14 2:00 1:00 D 8812742SwollmanRule Mont 1918 only - Oct 31 2:00 0 S 8822742SwollmanRule Mont 1919 only - Mar 31 2:30 1:00 D 8832742SwollmanRule Mont 1919 only - Oct 25 2:30 0 S 8842742SwollmanRule Mont 1920 only - May 2 2:30 1:00 D 8852742SwollmanRule Mont 1920 only - Oct 3 2:30 0 S 8862742SwollmanRule Mont 1921 only - May 1 2:00 1:00 D 8872742SwollmanRule Mont 1921 only - Oct 2 2:30 0 S 8882742SwollmanRule Mont 1922 only - Apr 30 2:00 1:00 D 8892742SwollmanRule Mont 1922 only - Oct 1 2:30 0 S 8902742SwollmanRule Mont 1924 only - May 17 2:00 1:00 D 8912742SwollmanRule Mont 1924 1926 - Sep lastSun 2:30 0 S 8922742SwollmanRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 8932742SwollmanRule Mont 1927 only - May 1 0:00 1:00 D 8942742SwollmanRule Mont 1927 1932 - Sep Sun>=25 0:00 0 S 8952742SwollmanRule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D 8962742SwollmanRule Mont 1932 only - May 1 0:00 1:00 D 8972742SwollmanRule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D 8982742SwollmanRule Mont 1933 only - Oct 1 0:00 0 S 8992742SwollmanRule Mont 1934 1939 - Sep Sun>=24 0:00 0 S 9002742SwollmanRule Mont 1945 1948 - Sep lastSun 2:00 0 S 9012742SwollmanRule Mont 1946 1986 - Apr lastSun 2:00 1:00 D 9022742SwollmanRule Mont 1949 1950 - Oct lastSun 2:00 0 S 9032742SwollmanRule Mont 1951 1956 - Sep lastSun 2:00 0 S 9042742SwollmanRule Mont 1957 max - Oct lastSun 2:00 0 S 9052742SwollmanRule Mont 1987 max - Apr Sun>=1 2:00 1:00 D 9062742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9072742SwollmanZone America/Montreal -4:54:16 - LMT 1884 9082742Swollman -5:00 Mont E%sT 90917200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 91017200Swollman -5:00 Canada E%sT 1970 91117200Swollman -5:00 Mont E%sT 1973 91217200Swollman -5:00 - EST 1974 91317200Swollman -5:00 Canada E%sT 91417200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 91517200Swollman -5:00 Canada E%sT 91617200SwollmanZone America/Rainy_River -6:17:56 - LMT 1895 91717200Swollman -6:00 Canada C%sT 9182742Swollman 9198029Swollman 92017200Swollman# Manitoba 92119878Swollman 9222742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 9232742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 9242742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 9252742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 9262742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 9272742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 92814343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 92975267SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W 9302742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 9312742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 9322742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 9332742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 93414343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 93514343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 93614343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 93714343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 93814343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 9392742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 9402742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 9412742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 94214343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 9432742SwollmanRule Winn 1966 1986 - Apr lastSun 2:00 1:00 D 94467578SwollmanRule Winn 1966 1986 - Oct lastSun 2:00 0 S 9452742SwollmanRule Winn 1987 max - Apr Sun>=1 2:00 1:00 D 94667578Swollman# From Paul Eggert (2000-10-02): 94767578Swollman# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from 94867578Swollman# DST at 03:00 local time. For now, assume it started in 1987. 94967578SwollmanRule Winn 1987 max - Oct lastSun 2:00s 0 S 9502742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9512742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 9522742Swollman -6:00 Winn C%sT 9532742Swollman 9548029Swollman 95517200Swollman# Saskatchewan 95617200Swollman 95767578Swollman# From Paul Eggert (2000-10-02): 95817200Swollman# Shanks writes that since 1970 most of this region has been like Regina. 95917200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 96017200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 96167578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 96267578Swollman# are like Winnipeg, in violation of Saskatchewan law. 96317200Swollman 96419878Swollman# From W. Jones <jones@skdad.usask.ca> (1992-11-06): 96517200Swollman# The. . .below is based on information I got from our law library, the 96617200Swollman# provincial archives, and the provincial Community Services department. 96717200Swollman# A precise history would require digging through newspaper archives, and 96817200Swollman# since you didn't say what you wanted, I didn't bother. 96917200Swollman# 97017200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 97117200Swollman# the boundary became pretty ragged as communities near it reevaluated 97217200Swollman# their affiliations in one direction or the other. In 1965 a provincial 97317200Swollman# referendum favoured legislating common time practices. 97417200Swollman# 97517200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 97617200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 97717200Swollman# part of Saskatchewan would use CST year round, that districts in 97817200Swollman# northwest Saskatchewan would by default follow CST but could opt to 97917200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 98017200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 98117200Swollman# by default follow MT but could opt to follow CST. 98217200Swollman# 98317200Swollman# It took a few years for the dust to settle (I know one story of a town 98417200Swollman# on one time zone having its school in another, such that a mom had to 98517200Swollman# serve her family lunch in two shifts), but presently it seems that only 98617200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 98717200Swollman# rules any more; all other districts appear to have used CST year round 98817200Swollman# since sometime in the 1960s. 98917200Swollman 9902742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 9912742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 9922742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 9932742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 9942742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 9952742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 9962742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 9972742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 9982742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 99975267SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W 10002742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 100117200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 100217200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 100317200SwollmanRule Regina 1947 1959 - Apr lastSun 2:00 1:00 D 100417200SwollmanRule Regina 1947 1958 - Sep lastSun 2:00 0 S 100517200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 100617200Swollman# 100717200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 100817200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 100917200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 101017200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 101117200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 10122742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 101317200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 101417200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 10152742Swollman -6:00 - CST 101617200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 101717200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 101817200Swollman -7:00 Regina M%sT 1950 101917200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 102017200Swollman -6:00 - CST 10212742Swollman 10228029Swollman 102317200Swollman# Alberta 102417200Swollman 10252742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 10262742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 10272742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 10282742SwollmanRule Edm 1919 only - May 27 2:00 0 S 10292742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 10302742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 10312742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 103275267SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W 10332742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 10342742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 10352742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 10362742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 10372742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 10382742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 10392742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 10402742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 10412742SwollmanRule Edm 1972 max - Oct lastSun 2:00 0 S 10422742SwollmanRule Edm 1987 max - Apr Sun>=1 2:00 1:00 D 10432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10442742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 10452742Swollman -7:00 Edm M%sT 10462742Swollman 10478029Swollman 104817200Swollman# British Columbia 104917200Swollman 105067578Swollman# From Paul Eggert (2000-10-02): 105117200Swollman# Shanks writes that since 1970 most of this region has been like Vancouver. 105258787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 105367578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 105417200Swollman 10552742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 10562742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 10572742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 105875267SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W 10592742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 10602742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 10612742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 10622742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 10632742SwollmanRule Vanc 1962 max - Oct lastSun 2:00 0 S 10642742SwollmanRule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D 10652742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10662742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 10672742Swollman -8:00 Vanc P%sT 106817200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 106917200Swollman -8:00 Canada P%sT 1947 107017200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 107117200Swollman -7:00 - MST 10722742Swollman 10738029Swollman 107458787Sru# Northwest Territories, Nunavut, Yukon 107517200Swollman 107658787Sru# From Paul Eggert (1999-10-29): 107717200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 107820094Swollman# Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs: 107920094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 108020094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 108120094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 108220094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 108320094Swollman# * O.I.C. 1980/02 established DST. 108420094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 108520094Swollman# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander. 108617200Swollman 108758787Sru# From Rives McDow (1999-09-04): 108858787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 108958787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 109058787Sru# Nunavut moves to single time zone Oct. 31 109158787Sru# </a> 109258787Sru# 109358787Sru# From Antoine Leca (1999-09-06): 109458787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 109558787Sru# to differentiate it from the Yellowknife region. 109658787Sru 109758787Sru# From Paul Eggert (1999-09-20): 109858787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 109958787Sru# Basic Facts: The New Territory 110086222Swollman# </a> (1999) reports that Pangnirtung operates on eastern time, 110158787Sru# and that Coral Harbour does not observe DST. We don't know when 110286222Swollman# Pangnirtung switched to eastern time; we'll guess 1995. 110358787Sru# We'll ignore the claim about Coral Harbour for now, 110458787Sru# since we have no further info. 110558787Sru 110658787Sru# From Rives McDow (1999-11-08): 110758787Sru# On October 31, when the rest of Nunavut went to Central time, 110858787Sru# Pangnirtung wobbled. Here is the result of their wobble: 110958787Sru# 111058787Sru# The following businesses and organizations in Pangnirtung use Central Time: 111158787Sru# 111258787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 111358787Sru# Eastern Arctic National Parks, A & D Specialist 111458787Sru# 111558787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 111658787Sru# 111758787Sru# Hamlet office, All other businesses, Both schools, Airport operator 111858787Sru# 111958787Sru# This has made for an interesting situation there, which warranted the news. 112058787Sru# No one there that I spoke with seems concerned, or has plans to 112158787Sru# change the local methods of keeping time, as it evidently does not 112258787Sru# really interfere with any activities or make things difficult locally. 112358787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 112458787Sru# so it appears that the situation will last at least that long. 112558787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 112658787Sru# their senses", but the locals evidently don't see any problem with 112758787Sru# the current state of affairs. 112858787Sru 112958787Sru# From Michaela Rodrigue, writing in the 113058787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 113158787Sru# Nunatsiaq News (1999-11-19)</a>: 113258787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 113358787Sru# central - or Nunavut time - for government offices, and eastern time 113458787Sru# for municipal offices and schools.... Igloolik [was similar but then] 113558787Sru# made the switch to central time on Saturday, Nov. 6. 113658787Sru 113767578Swollman# From Paul Eggert (2000-10-02): 113867578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 113967578Swollman# for these potential new Zones. 114075267Swollman# 114167578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 114267578Swollman# handful of residents at the Eureka weather station [in the Central 114367578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 114467578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 114567578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 114667578Swollman# Central Time and Southampton Island [in the Central zone] is not 114767578Swollman# required to use daylight savings. 114867578Swollman 114975267Swollman# From 115075267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 115175267Swollman# Nunavut now has two time zones 115275267Swollman# </a> (2000-11-10): 115375267Swollman# The Nunavut government would allow its employees in Kugluktuk and 115475267Swollman# Cambridge Bay to operate on central time year-round, putting them 115575267Swollman# one hour behind the rest of Nunavut for six months during the winter. 115675267Swollman# At the end of October the two communities had rebelled against 115775267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 115875267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 115975267Swollman# central time, while Kugluktuk, even farther west, reverted to 116075267Swollman# mountain time, which they had used before the advent of Nunavut's 116175267Swollman# unified time zone in 1999. 116275267Swollman# 116375267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 116475267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 116575267Swollman 116675267Swollman# From Paul Eggert (2000-12-04): 116775267Swollman# Let's just keep track of the official times for now. 116875267Swollman 116975267Swollman# From Rives McDow (2001-03-07): 117075267Swollman# The premier of Nunavut has issued a ministerial statement advising 117175267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 117275267Swollman# back to three time zones (mountain, central, and eastern). Of the 117375267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 117475267Swollman# has said it will not observe dst, staying on EST year round. I'm 117575267Swollman# checking for more info, and will get back to you if I come up with 117675267Swollman# more. 117775267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 117875267Swollman 11792742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 118017200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 118117200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 118217200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 118317200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 118475267SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W 118517200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 118617200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 118717200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 118817200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 118917200SwollmanRule NT_YK 1980 max - Oct lastSun 2:00 0 S 119017200SwollmanRule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D 11912742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 119217200SwollmanZone America/Pangnirtung -4:22:56 - LMT 1884 119358787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 119458787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 119575267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 119675267Swollman -5:00 Canada E%sT 119758787SruZone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 119858787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 119975267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 120075267Swollman -5:00 Canada E%sT 120175267SwollmanZone America/Rankin_Inlet -6:08:40 - LMT 1884 120275267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 120375267Swollman -5:00 - EST 2001 Apr 1 3:00 120458787Sru -6:00 Canada C%sT 120558787SruZone America/Cambridge_Bay -7:00:20 - LMT 1884 120658787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 120775267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 120875267Swollman -5:00 - EST 2000 Nov 5 0:00 120975267Swollman -6:00 - CST 2001 Apr 1 3:00 121075267Swollman -7:00 Canada M%sT 121117200SwollmanZone America/Yellowknife -7:37:24 - LMT 1884 121217200Swollman -7:00 NT_YK M%sT 121317200SwollmanZone America/Inuvik -8:54:00 - LMT 1884 121417200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 121517200Swollman -7:00 NT_YK M%sT 12162742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 121717200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 121817200Swollman -8:00 NT_YK P%sT 121917200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 122020094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 122117200Swollman -8:00 NT_YK P%sT 12222742Swollman 12238029Swollman 12242742Swollman############################################################################### 12252742Swollman 12262742Swollman# Mexico 12272742Swollman 122875267Swollman# From Paul Eggert (2001-03-05): 122975267Swollman# The Investigation and Analysis Service of the 123075267Swollman# Mexican Library of Congress (MLoC) has published a 123175267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 123275267Swollman# history of Mexican local time (in Spanish) 123375267Swollman# </a>. 12342742Swollman# 123575267Swollman# Here are the discrepancies between Shanks and the MLoC. 123675267Swollman# (In all cases we go with the MLoC.) 123775267Swollman# Shanks reports that Baja was at -8:00 in 1922/1923. 123875267Swollman# Shanks says the 1930 transition in Baja was 1930-11-16. 123975267Swollman# Shanks reports no DST during summer 1931. 124075267Swollman# Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01. 124175267Swollman# Shanks does not report transitions for Baja in 1945 or 1948. 124275267Swollman# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23. 124375267Swollman# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00 124475267Swollman# on 1997-10-26 at 02:00. 12452742Swollman 124675267Swollman# From Gwillim Law (2001-02-20): 124775267Swollman# There are some other discrepancies between the Decrees page and the 124875267Swollman# tz database. I think they can best be explained by supposing that 124975267Swollman# the researchers who prepared the Decrees page failed to find some of 125075267Swollman# the relevant documents. 125175267Swollman 125264499Swollman# From Paul Eggert (2000-07-26): 125364499Swollman# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 125464499Swollman# and 1988 DST experiments. Go with spin.com.mx. 12552742Swollman 125617200Swollman# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15): 125717200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 125817200Swollman# outlining the timezone changes in Mexico. 125958787Sru# 126017200Swollman# ------------- Begin Forwarded Message ------------- 126158787Sru# 126217200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 126317200Swollman# rules for the DST changes. The rules are: 126458787Sru# 126517200Swollman# 1. The country is divided in 3 timezones: 126617200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 126717200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 126817200Swollman# - The rest of the country (the Mexico/General TZ) 126958787Sru# 127017200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 127117200Swollman# at 2:00 AM, the times in each zone are as follows: 127217200Swollman# BajaNorte: GMT+7 127317200Swollman# BajaSur: GMT+6 127417200Swollman# General: GMT+5 127558787Sru# 127617200Swollman# 3. The rest of the year, the times are as follows: 127717200Swollman# BajaNorte: GMT+8 127817200Swollman# BajaSur: GMT+7 127917200Swollman# General: GMT+6 128058787Sru# 128117200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 128258787Sru# 128317200Swollman# -------------- End Forwarded Message -------------- 128417200Swollman# From Paul Eggert (1996-06-12): 128543014Swollman# For an English translation of the decree, see 128643014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 128743014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 128843014Swollman# </a> 128914343Swollman 129043543Swollman# From Rives McDow (1998-10-08): 129143543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 129243543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 129343543Swollman 129458787Sru# From Rives McDow (2000-01-10): 129558787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 129658787Sru# zone 5 hours from the International Date Line, and will not observe daylight 129758787Sru# savings time so as to stay on the same time zone as the southern part of 129858787Sru# Arizona year round. 129958787Sru 130075267Swollman# From Jesper Norgaard, translating 130175267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 130275267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 130375267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 130475267Swollman# year, so that the more than 10,000 schools work at normal hour the 130575267Swollman# whole year. 130675267Swollman 130775267Swollman# From Gwillim Law (2001-01-19): 130875267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 130975267Swollman# (translated):... 131075267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 131175267Swollman# that Summer Time will be reduced from seven to five months, starting 131275267Swollman# this year.... 131375267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 131475267Swollman# [translated], says "summer time will ... take effect on the first Sunday 131575267Swollman# in May, and end on the last Sunday of September. 131675267Swollman 131775267Swollman# From Arthur David Olson (2001-01-25): 131875267Swollman# The 2001-01-24 traditional Washington Post contained the page one 131975267Swollman# story "Timely Issue Divides Mexicans."... 132075267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 132175267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 132275267Swollman# Mexico City and its 20 million residents on a different time than 132375267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 132475267Swollman# observation of Daylight Saving Time. 132575267Swollman 132675267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 132775267Swollman# Official statute published by the Energy Department 132875267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 132975267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 133075267Swollman 133175267Swollman# From Paul Eggert (2001-03-03): 133275267Swollman# 133375267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 133475267Swollman# James F. Smith writes in today's LA Times 133575267Swollman# </a> 133675267Swollman# * Sonora will continue to observe standard time. 133775267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 133875267Swollman# the Federal District will not adopt DST. 133975267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 134075267Swollman# * The decree does not affect federal-controlled facilities including 134175267Swollman# the airport, banks, hospitals, and schools. 134275267Swollman# 134375267Swollman# For now we'll assume that the Federal District will bow to federal rules. 134475267Swollman 134575267Swollman# From Jesper Norgaard (2001-04-01): 134675267Swollman# I found some references to the Mexican application of daylight 134775267Swollman# saving, which modifies what I had already sent you, stating earlier 134875267Swollman# that a number of northern Mexican states would go on daylight 134975267Swollman# saving. The modification reverts this to only cover Baja California 135075267Swollman# (Norte), while all other states (except Sonora, who has no daylight 135175267Swollman# saving all year) will follow the original decree of president 135275267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 135375267Swollman# September 30, 2001. 135475267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 135575267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 135675267Swollman 135786222Swollman# From Reuters (2001-09-04): 135886222Swollman# Mexico's Supreme Court on Tuesday declared that daylight savings was 135986222Swollman# unconstitutional in Mexico City, creating the possibility the 136086222Swollman# capital will be in a different time zone from the rest of the nation 136186222Swollman# next year.... The Supreme Court's ruling takes effect at 2:00 136286222Swollman# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to 136386222Swollman# standard time. "This is so residents of the Federal District are not 136486222Swollman# subject to unexpected time changes," a statement from the court said. 136586222Swollman 13662742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 13672742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 13682742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 13692742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 13702742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 137175267SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W 13722742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 13732742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 13742742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 137575267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 137675267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 137775267SwollmanRule Mexico 2001 max - May Sun>=1 2:00 1:00 D 137875267SwollmanRule Mexico 2001 max - Sep lastSun 2:00 0 S 13792742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 138043014Swollman# Quintana Roo 138158787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 138275267Swollman -6:00 - CST 1981 Dec 23 138343543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 138443543Swollman -6:00 Mexico C%sT 138564499Swollman# Campeche, Yucatan 138664499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 138775267Swollman -6:00 - CST 1981 Dec 23 138864499Swollman -5:00 - EST 1982 Dec 2 138964499Swollman -6:00 Mexico C%sT 139064499Swollman# Coahuila, Durango, Nuevo Leon, Tamaulipas 139175267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 139264499Swollman -6:00 - CST 1988 139364499Swollman -6:00 US C%sT 1989 139464499Swollman -6:00 Mexico C%sT 139543014Swollman# Central Mexico 13962742SwollmanZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 13972742Swollman -7:00 - MST 1927 Jun 10 23:00 13982742Swollman -6:00 - CST 1930 Nov 15 13992742Swollman -7:00 - MST 1931 May 1 23:00 14002742Swollman -6:00 - CST 1931 Oct 140175267Swollman -7:00 - MST 1932 Apr 1 140286222Swollman -6:00 Mexico C%sT 2001 Sep 30 02:00 140386222Swollman -6:00 - CST 140443014Swollman# Chihuahua 140558787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 140643014Swollman -7:00 - MST 1927 Jun 10 23:00 140743014Swollman -6:00 - CST 1930 Nov 15 140843014Swollman -7:00 - MST 1931 May 1 23:00 140943014Swollman -6:00 - CST 1931 Oct 141075267Swollman -7:00 - MST 1932 Apr 1 141143014Swollman -6:00 - CST 1996 141243014Swollman -6:00 Mexico C%sT 1998 141343014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 141443014Swollman -7:00 Mexico M%sT 141558787Sru# Sonora 141658787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 141758787Sru -7:00 - MST 1927 Jun 10 23:00 141858787Sru -6:00 - CST 1930 Nov 15 141958787Sru -7:00 - MST 1931 May 1 23:00 142058787Sru -6:00 - CST 1931 Oct 142175267Swollman -7:00 - MST 1932 Apr 1 142264499Swollman -6:00 - CST 1942 Apr 24 142358787Sru -7:00 - MST 1949 Jan 14 142458787Sru -8:00 - PST 1970 142558787Sru -7:00 Mexico M%sT 1999 142658787Sru -7:00 - MST 142764499Swollman# Baja California Sur, Nayarit, Sinaloa 14282742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 14292742Swollman -7:00 - MST 1927 Jun 10 23:00 14302742Swollman -6:00 - CST 1930 Nov 15 14312742Swollman -7:00 - MST 1931 May 1 23:00 14322742Swollman -6:00 - CST 1931 Oct 143375267Swollman -7:00 - MST 1932 Apr 1 143464499Swollman -6:00 - CST 1942 Apr 24 14352742Swollman -7:00 - MST 1949 Jan 14 14362742Swollman -8:00 - PST 1970 143714343Swollman -7:00 Mexico M%sT 143858787Sru# Baja California 14392742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 144075267Swollman -7:00 - MST 1924 14412742Swollman -8:00 - PST 1927 Jun 10 23:00 144275267Swollman -7:00 - MST 1930 Nov 15 144375267Swollman -8:00 - PST 1931 Apr 1 144475267Swollman -8:00 1:00 PDT 1931 Sep 30 144564499Swollman -8:00 - PST 1942 Apr 24 144675267Swollman -8:00 1:00 PWT 1945 Nov 12 144775267Swollman -8:00 - PST 1948 Apr 5 144875267Swollman -8:00 1:00 PDT 1949 Jan 14 144975267Swollman -8:00 - PST 1954 145075267Swollman -8:00 CA P%sT 1961 145175267Swollman -8:00 - PST 1976 145214343Swollman -8:00 US P%sT 1996 145375267Swollman -8:00 Mexico P%sT 2001 145475267Swollman -8:00 US P%sT 145575267Swollman# From Paul Eggert (2001-03-05): 145675267Swollman# Formerly there was an America/Ensenada zone, which differed from 145775267Swollman# America/Tijuana only in that it did not observe DST from 1976 145875267Swollman# through 1995. This was as per Shanks. However, Guy Harris reports 145975267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 146075267Swollman# Tijuana observe DST," which contradicts Shanks but does imply that 146175267Swollman# DST-observance was a town-by-town matter back then. This concerns 146275267Swollman# data after 1970 so most likely there should be at least one Zone 146375267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 146475267Swollman# name or contents should be. 14652742Swollman# 14662742Swollman# Revillagigedo Is 14672742Swollman# no information 14682742Swollman 14692742Swollman############################################################################### 14702742Swollman 14712742Swollman# Anguilla 14722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14732742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 14742742Swollman -4:00 - AST 14752742Swollman 14762742Swollman# Antigua and Barbuda 14772742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14782742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 14792742Swollman -5:00 - EST 1951 14802742Swollman -4:00 - AST 14812742Swollman 14822742Swollman# Bahamas 14832742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14842742SwollmanRule Bahamas 1964 max - Oct lastSun 2:00 0 S 14852742SwollmanRule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D 14862742SwollmanRule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D 14872742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14882742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 14892742Swollman -5:00 Bahamas E%sT 14902742Swollman 14912742Swollman# Barbados 14922742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14932742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 14942742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 14952742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 14962742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 14972742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 14982742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14992742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 150043014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 15012742Swollman -4:00 Barb A%sT 15022742Swollman 15032742Swollman# Belize 15042742Swollman# Whitman entirely disagrees with Shanks; go with Shanks. 15052742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15062742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 15072742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 15082742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 15092742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 15102742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 15112742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 15122742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15132742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 15142742Swollman -6:00 Belize C%sT 15152742Swollman 15162742Swollman# Bermuda 15172742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15182742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 15192742Swollman -4:00 - AST 1974 Apr 28 2:00 15202742Swollman -4:00 Bahamas A%sT 15212742Swollman 15222742Swollman# Cayman Is 15232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15242742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 152543014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 15262742Swollman -5:00 - EST 15272742Swollman 15282742Swollman# Costa Rica 15292742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15302742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 15312742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 153220094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 153320094Swollman# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks. 153420094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 153520094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 15362742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 15372742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15382742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 153958787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 15402742Swollman -6:00 CR C%sT 15412742Swollman# Coco 15422742Swollman# no information; probably like America/Costa_Rica 15432742Swollman 15442742Swollman# Cuba 15452742Swollman 154658787Sru# From Arthur David Olson (1999-03-29): 154758787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 154858787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 154958787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 155058787Sru# During the game, play-by-play announcer Jim Hunter noted that 155158787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 155258787Sru# Time today." (The "two hour" remark referred to losing one hour of 155358787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 155458787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 155558787Sru# returned to Baltimore, which switches on that date.) 15562742Swollman 15572742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15582742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 15592742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 15602742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 15612742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 15622742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 15632742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 15642742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 15652742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 15662742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 15672742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 15682742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 15692742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 15702742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 15712742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 15722742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 15732742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 15742742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 15752742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 157630711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 15772742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 15782742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 15792742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 158043014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 158120094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 158243014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 158343014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 158458787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 158543014SwollmanRule Cuba 1998 max - Oct lastSun 0:00s 0 S 158658787SruRule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D 15872742Swollman 15882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15892742SwollmanZone America/Havana -5:29:28 - LMT 1890 159058787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 15912742Swollman -5:00 Cuba C%sT 15922742Swollman 15932742Swollman# Dominica 15942742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15952742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 15962742Swollman -4:00 - AST 15972742Swollman 15982742Swollman# Dominican Republic 159975267Swollman 160075267Swollman# From Steffen Thorsen (2000-10-30): 160175267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 160275267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 160375267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 160475267Swollman 160575267Swollman# From Paul Eggert (2000-12-04): 160675267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 160775267Swollman 160875267Swollman# From Rives McDow (2000-12-01): 160975267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 161075267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 161175267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 161275267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 161375267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 161475267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 161575267Swollman# decided to revert. 161675267Swollman 161775267Swollman 16182742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16192742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 16202742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 16212742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 16222742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 16232742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 16242742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 16252742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16262742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 16272742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 16282742Swollman -5:00 DR E%sT 1974 Oct 27 162975267Swollman -4:00 - AST 2000 Oct 29 02:00 163075267Swollman -5:00 US E%sT 2000 Dec 3 01:00 16312742Swollman -4:00 - AST 16322742Swollman 16332742Swollman# El Salvador 16342742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16352742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 16362742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 16372742Swollman# There are too many San Salvadors elsewhere, so we'll use `El Salvador'. 16382742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16392742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 16402742Swollman -6:00 Salv C%sT 16412742Swollman 16422742Swollman# Grenada 16432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 164419878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 16452742Swollman -4:00 - AST 16462742Swollman 16472742Swollman# Guadeloupe 16482742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16492742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 16502742Swollman -4:00 - AST 16512742Swollman 16522742Swollman# Guatemala 16532742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16542742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 16552742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 16562742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 16572742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 165820094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 165920094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 16602742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16612742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 16622742Swollman -6:00 Guat C%sT 16632742Swollman 16642742Swollman# Haiti 16652742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16662742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 16672742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 16682742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 166958787Sru# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA. 167043014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 167143014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 16722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16732742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 16742742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 16752742Swollman -5:00 Haiti E%sT 16762742Swollman 16772742Swollman# Honduras 16782742Swollman# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1. 16792742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16802742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 16812742Swollman -6:00 Salv C%sT 168243543Swollman# 168343543Swollman# Great Swan I ceded by US to Honduras in 1972 16842742Swollman 16852742Swollman# Jamaica 16862742Swollman 168719878Swollman# From Bob Devine (1988-01-28): 16882742Swollman# Follows US rules. 16892742Swollman 169019878Swollman# From U. S. Naval Observatory (1989-01-19): 16912742Swollman# JAMAICA 5 H BEHIND UTC 16922742Swollman 169358787Sru# From Shanks: 16942742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16952742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 169643014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 169758787Sru -5:00 - EST 1974 Apr 28 2:00 169820094Swollman -5:00 US E%sT 1984 169920094Swollman -5:00 - EST 17002742Swollman 17012742Swollman# Martinique 17022742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17032742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 170486222Swollman -4:04:20 - FFMT 1911 May # Fort-de-France MT 17052742Swollman -4:00 - AST 1980 Apr 6 17062742Swollman -4:00 1:00 ADT 1980 Sep 28 17072742Swollman -4:00 - AST 17082742Swollman 17092742Swollman# Montserrat 171030711Swollman# From Paul Eggert (1997-08-31): 171130711Swollman# Recent volcanic eruptions have forced evacuation of Plymouth, the capital. 171230711Swollman# Luckily, Olveston, the current de facto capital, has the same longitude. 17132742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 171430711SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston 17152742Swollman -4:00 - AST 17162742Swollman 17172742Swollman# Nicaragua 171843543Swollman# 171943543Swollman# From Steffen Thorsen (1998-12-29): 172043543Swollman# Nicaragua seems to be back at -6:00 but I have not been able to find when 172143543Swollman# they changed from -5:00. 172243543Swollman# 17232742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 17242742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 17252742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 172620094SwollmanRule Nic 1992 only - Jan 1 4:00 1:00 D 172720094SwollmanRule Nic 1992 only - Sep 24 0:00 0 S 17282742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17292742SwollmanZone America/Managua -5:45:08 - LMT 1890 173086222Swollman -5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? 17312742Swollman -6:00 - CST 1973 May 17322742Swollman -5:00 - EST 1975 Feb 16 173320094Swollman -6:00 Nic C%sT 1993 Jan 1 4:00 173443543Swollman -5:00 - EST 1998 Dec 173543543Swollman -6:00 - CST 17362742Swollman 17372742Swollman# Panama 17382742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17392742SwollmanZone America/Panama -5:18:08 - LMT 1890 174086222Swollman -5:19:36 - CMT 1908 Apr 22 # Colon Mean Time 17412742Swollman -5:00 - EST 17422742Swollman 17432742Swollman# Puerto Rico 17442742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 17452742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 174614343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 17472742Swollman -4:00 - AST 1942 May 3 174814343Swollman -4:00 1:00 AWT 1945 Sep 30 2:00 17492742Swollman -4:00 - AST 17502742Swollman 17512742Swollman# St Kitts-Nevis 17522742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17532742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 17542742Swollman -4:00 - AST 17552742Swollman 17562742Swollman# St Lucia 17572742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17582742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 175986222Swollman -4:04:00 - CMT 1912 # Castries Mean Time 17602742Swollman -4:00 - AST 17612742Swollman 17622742Swollman# St Pierre and Miquelon 17632742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 17642742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17652742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 17662742Swollman -4:00 - AST 1980 May 176719878Swollman -3:00 Mont PM%sT # Pierre & Miquelon Time 17682742Swollman 17692742Swollman# St Vincent and the Grenadines 17702742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17712742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 177243014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 17732742Swollman -4:00 - AST 17742742Swollman 17752742Swollman# Turks and Caicos 177643014Swollman# From Paul Eggert (1998-08-06): 177743014Swollman# Shanks says they use US DST rules, but IATA SSIM (1991/1998) 177820094Swollman# says they switch at midnight. Go with IATA SSIM. 177920094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 178020094SwollmanRule TC 1979 1986 - Apr lastSun 0:00 1:00 D 178120094SwollmanRule TC 1979 max - Oct lastSun 0:00 0 S 178220094SwollmanRule TC 1987 max - Apr Sun>=1 0:00 1:00 D 17832742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17842742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 178543014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 178620094Swollman -5:00 TC E%sT 17878029Swollman 178814343Swollman# British Virgin Is 17892742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 179014343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 17912742Swollman -4:00 - AST 17928029Swollman 179314343Swollman# Virgin Is 179414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 179514343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 179614343Swollman -4:00 - AST 1797