northamerica revision 75267
175267Swollman# @(#)northamerica 7.58 22742Swollman# also includes Central America and the Caribbean 32742Swollman 464499Swollman# $FreeBSD: head/share/zoneinfo/northamerica 75267 2001-04-06 16:46:52Z 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 8667578Swollman# to switch to London for Atlee'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 9167578Swollman# London which were to precede Mr. Atlee'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 19075267Swollman# From Ryan Alessi of the Thousand Oaks Star (2001-02-15) via Rives McDow: 19175267Swollman# Brad Sherman, D-Sherman Oaks, introduced a bill in Congress on 19275267Swollman# Wednesday that could have California operating on Denver time as 19375267Swollman# early as this summer.... The options include keeping 19475267Swollman# daylight-saving time all year long, or setting clocks back two hours 19575267Swollman# -- instead of just one -- during the existing daylight-saving time. 19675267Swollman 19775267Swollman 19814343Swollman# US Eastern time, represented by New York 19967578Swollman 20067578Swollman# Connecticut, Delaware, District of Columbia, most of Florida, 20167578Swollman# Georgia, far southeastern Indiana, eastern Kentucky, Maine, 20267578Swollman# Maryland, Massachusetts, New Hampshire, New Jersey, New York, North 20367578Swollman# Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, eastern 20467578Swollman# Tennessee, Vermont, Virginia, West Virginia 20567578Swollman 20614343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 20714343SwollmanRule NYC 1920 only - Mar lastSun 2:00 1:00 D 20814343SwollmanRule NYC 1920 only - Oct lastSun 2:00 0 S 20914343SwollmanRule NYC 1921 1966 - Apr lastSun 2:00 1:00 D 21014343SwollmanRule NYC 1921 1954 - Sep lastSun 2:00 0 S 21114343SwollmanRule NYC 1955 1966 - Oct lastSun 2:00 0 S 21214343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 21314343SwollmanZone America/New_York -4:56:02 - LMT 1883 Nov 18 12:00 21414343Swollman -5:00 US E%sT 1920 21514343Swollman -5:00 NYC E%sT 1942 21614343Swollman -5:00 US E%sT 1946 21714343Swollman -5:00 NYC E%sT 1967 21814343Swollman -5:00 US E%sT 2192742Swollman 22014343Swollman# US Central time, represented by Chicago 22167578Swollman 22267578Swollman# Alabama, Arkansas, Florida panhandle, Illinois, western Indiana 22367578Swollman# corners, Iowa, most of Kansas, western Kentucky, Louisiana, 22467578Swollman# Minnesota, Mississippi, Missouri, eastern Nebraska, eastern North 22567578Swollman# Dakota, Oklahoma, eastern South Dakota, western Tennessee, most of 22667578Swollman# Texas, Wisconsin 22767578Swollman 22814343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 22914343SwollmanRule Chicago 1920 only - Jun 13 2:00 1:00 D 23014343SwollmanRule Chicago 1920 1921 - Oct lastSun 2:00 0 S 23114343SwollmanRule Chicago 1921 only - Mar lastSun 2:00 1:00 D 23214343SwollmanRule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D 23314343SwollmanRule Chicago 1922 1954 - Sep lastSun 2:00 0 S 23414343SwollmanRule Chicago 1955 1966 - Oct lastSun 2:00 0 S 23514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 23614343SwollmanZone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:00 23714343Swollman -6:00 US C%sT 1920 23814343Swollman -6:00 Chicago C%sT 1936 Mar 1 2:00 23914343Swollman -5:00 - EST 1936 Nov 15 2:00 24014343Swollman -6:00 Chicago C%sT 1942 24114343Swollman -6:00 US C%sT 1946 24214343Swollman -6:00 Chicago C%sT 1967 24314343Swollman -6:00 US C%sT 2442742Swollman 24514343Swollman# US Mountain time, represented by Denver 24667578Swollman# 24767578Swollman# Colorado, southern Idaho, far western Kansas, Montana, western 24867578Swollman# Nebraska, New Mexico, southwestern North Dakota, far eastern Oregon, 24975267Swollman# western South Dakota, far western Texas (El Paso County, Hudspeth County, 25075267Swollman# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming 25167578Swollman# 25214343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 25314343SwollmanRule Denver 1920 1921 - Mar lastSun 2:00 1:00 D 25414343SwollmanRule Denver 1920 only - Oct lastSun 2:00 0 S 25514343SwollmanRule Denver 1921 only - May 22 2:00 0 S 25614343SwollmanRule Denver 1965 1966 - Apr lastSun 2:00 1:00 D 25714343SwollmanRule Denver 1965 1966 - Oct lastSun 2:00 0 S 2582742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 25914343SwollmanZone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00 26015309Swollman -7:00 US M%sT 1920 26115309Swollman -7:00 Denver M%sT 1942 26215309Swollman -7:00 US M%sT 1946 26315309Swollman -7:00 Denver M%sT 1967 26415309Swollman -7:00 US M%sT 2652742Swollman 26614343Swollman# US Pacific time, represented by Los Angeles 26767578Swollman# 26867578Swollman# California, northern Idaho, Nevada, most of Oregon, and Washington 26967578Swollman# 27014343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 27114343SwollmanRule CA 1948 only - Mar 14 2:00 1:00 D 27214343SwollmanRule CA 1949 only - Jan 1 2:00 0 S 27314343SwollmanRule CA 1950 1966 - Apr lastSun 2:00 1:00 D 27414343SwollmanRule CA 1950 1961 - Sep lastSun 2:00 0 S 27514343SwollmanRule CA 1962 1966 - Oct lastSun 2:00 0 S 27614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 27714343SwollmanZone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:00 27814343Swollman -8:00 US P%sT 1946 27914343Swollman -8:00 CA P%sT 1967 28014343Swollman -8:00 US P%sT 2818029Swollman 28214343Swollman# Alaska 28314343Swollman# AK%sT is the modern abbreviation for -9:00 per USNO. 28414343Swollman# 28575267Swollman# From Paul Eggert (2001-04-01): 28614343Swollman# Howse writes that Alaska switched from the Julian to the Gregorian calendar, 28719878Swollman# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. 28875267Swollman# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, 28975267Swollman# also a Friday. Include only the time zone part of this transition, 29075267Swollman# ignoring the switch from Julian to Gregorian, since we can't represent 29175267Swollman# the Julian calendar. 29214343Swollman# 29314343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 29475267SwollmanZone America/Juneau 15:02:19 - LMT 1867 Oct 18 29575267Swollman -8:57:41 - LMT 1900 Aug 20 12:00 29614343Swollman -8:00 - PST 1942 29714343Swollman -8:00 US P%sT 1946 29814343Swollman -8:00 - PST 1969 29914343Swollman -8:00 US P%sT 1983 Oct 30 2:00 30014343Swollman -9:00 US AK%sT 30175267SwollmanZone America/Yakutat 14:41:05 - LMT 1867 Oct 18 30275267Swollman -9:18:55 - LMT 1900 Aug 20 12:00 30314343Swollman -9:00 - YST 1942 30414343Swollman -9:00 US Y%sT 1946 30514343Swollman -9:00 - YST 1969 30614343Swollman -9:00 US Y%sT 1983 Oct 30 2:00 30714343Swollman -9:00 US AK%sT 30875267SwollmanZone America/Anchorage 14:00:24 - LMT 1867 Oct 18 30975267Swollman -9:59:36 - LMT 1900 Aug 20 12:00 31014343Swollman -10:00 - CAT 1942 31114343Swollman -10:00 US CAT/CAWT 1946 31214343Swollman -10:00 - CAT 1967 Apr 31314343Swollman -10:00 - AHST 1969 31414343Swollman -10:00 US AH%sT 1983 Oct 30 2:00 31514343Swollman -9:00 US AK%sT 31675267SwollmanZone America/Nome 12:58:21 - LMT 1867 Oct 18 31775267Swollman -11:01:38 - LMT 1900 Aug 20 12:00 31814343Swollman -11:00 - NST 1942 31914343Swollman -11:00 US N%sT 1946 32014343Swollman -11:00 - NST 1967 Apr 32114343Swollman -11:00 - BST 1969 32214343Swollman -11:00 US B%sT 1983 Oct 30 2:00 32314343Swollman -9:00 US AK%sT 32475267SwollmanZone America/Adak 12:13:21 - LMT 1867 Oct 18 32575267Swollman -11:46:38 - LMT 1900 Aug 20 12:00 32614343Swollman -11:00 - NST 1942 32714343Swollman -11:00 US N%sT 1946 32814343Swollman -11:00 - NST 1967 Apr 32914343Swollman -11:00 - BST 1969 33014343Swollman -11:00 US B%sT 1983 Oct 30 2:00 33114343Swollman -10:00 US HA%sT 33214343Swollman# Shanks writes that part of southwest Alaska (e.g. Aniak) 33314343Swollman# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, 33414343Swollman# and another part (e.g. Akiak) made the same switch five weeks later. 33514343Swollman# These switches don't quite make our 1970 cutoff. 3362742Swollman 33714343Swollman# Hawaii 33814343Swollman# 33914343Swollman# From Arthur David Olson: 34014343Swollman# And then there's Hawaii. 34114343Swollman# DST was observed for one day in 1933; 34214343Swollman# standard time was changed by half an hour in 1947; 34314343Swollman# it's always standard as of 1986. 34414343Swollman# 34514343Swollman# From Paul Eggert: 34614343Swollman# Shanks says the 1933 experiment lasted for three weeks. Go with Shanks. 34714343Swollman# 34814343SwollmanZone Pacific/Honolulu -10:31:26 - LMT 1900 Jan 1 12:00 34914343Swollman -10:30 - HST 1933 Apr 30 2:00 35014343Swollman -10:30 1:00 HDT 1933 May 21 2:00 35114343Swollman -10:30 US H%sT 1947 Jun 8 2:00 35214343Swollman -10:00 - HST 3532742Swollman 35414343Swollman# Now we turn to US areas that have diverged from the consensus since 1970. 35514343Swollman 35614343Swollman# Arizona mostly uses MST. 35714343SwollmanZone America/Phoenix -7:28:18 - LMT 1883 Nov 18 12:00 35814343Swollman -7:00 US M%sT 1944 Jan 1 00:01 35914343Swollman -7:00 - MST 1944 Mar 17 00:01 36014343Swollman -7:00 US M%sT 1944 Oct 1 00:01 36114343Swollman -7:00 - MST 1967 36214343Swollman -7:00 US M%sT 1968 36314343Swollman -7:00 - MST 36419878Swollman# From Arthur David Olson (1988-02-13): 36514343Swollman# A writer from the Inter Tribal Council of Arizona, Inc., 3662742Swollman# notes in private correspondence dated 12/28/87 that "Presently, only the 3672742Swollman# Navajo Nation participates in the Daylight Saving Time policy, due to its 3682742Swollman# large size and location in three states." (The "only" means that other 3692742Swollman# tribal nations don't use DST.) 3702742Swollman 37114343SwollmanLink America/Denver America/Shiprock 3722742Swollman 37314343Swollman# Southern Idaho and eastern Oregon switched four weeks late in 1974. 37414343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 37514343SwollmanZone America/Boise -7:44:49 - LMT 1883 Nov 18 12:00 37614343Swollman -8:00 US P%sT 1923 May 13 2:00 37714343Swollman -7:00 US M%sT 1974 37814343Swollman -7:00 - MST 1974 Feb 3 2:00 37914343Swollman -7:00 US M%sT 3802742Swollman 38114343Swollman# Indiana 38214343Swollman# 38358787Sru# For a map of Indiana's time zone regions, see: 38458787Sru# <a href="http://www.mccsc.edu/time.html"> 38558787Sru# What time is it in Indiana? 38658787Sru# </a> (1999-04-06) 38758787Sru# 38814343Swollman# From Paul Eggert (1995-12-19): 38914343Swollman# Indiana generally observes either EST all year, or CST/CDT, 39014343Swollman# but areas near Cincinnati and Louisville use those cities' timekeeping 39114343Swollman# and in 1969 and 1970 the whole state observed daylight time; 39214343Swollman# and there are other exceptions as noted below. 39314343Swollman# Shanks partitions Indiana into 345 regions, each with its own time history, 39414343Swollman# and writes ``Even newspaper reports present contradictory information.'' 39514343Swollman# Fortunately, most of the complexity occurred before our cutoff date of 1970. 39614343Swollman# 39714343Swollman# Since 1970, EST-only Indiana has been like America/Indianapolis, 39814343Swollman# with exceptions noted below for Crawford, Starke, and Switzerland counties. 39914343Swollman# The parts of Indiana not listed below have been like America/Chicago, 40014343Swollman# America/Louisville, or America/New_York. 40114343Swollman# 40214343Swollman# Other than Indianapolis, the Indiana place names are so nondescript 40314343Swollman# that they would be ambiguous if we left them at the `America' level. 40414343Swollman# So we reluctantly put them all in a subdirectory `America/Indiana'. 40514343Swollman# 40614343Swollman# Most of EST-only Indiana last observed DST in 1970. 40775267Swollman 40875267Swollman# From Paul Eggert (2001-03-06), following a tip by Markus Kuhn: 40975267Swollman# Pam Belluck reported in the New York Times (2001-01-31) that the 41075267Swollman# Indiana Legislature is considering a bill to adopt DST statewide. 41175267Swollman# Her article mentioned Vevay, whose post office observes a different 41275267Swollman# time zone than Danner's Hardware across the street. 41375267Swollman 41414343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 41514343SwollmanRule Indianapolis 1941 only - Jun 22 2:00 1:00 D 41614343SwollmanRule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S 41714343SwollmanRule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D 41814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 41914343SwollmanZone America/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:00 42014343Swollman -6:00 US C%sT 1920 42114343Swollman -6:00 Indianapolis C%sT 1942 42214343Swollman -6:00 US C%sT 1946 42314343Swollman -6:00 Indianapolis C%sT 1955 Apr 24 2:00 42414343Swollman -5:00 - EST 1957 Sep 29 2:00 42514343Swollman -6:00 - CST 1958 Apr 27 2:00 42614343Swollman -5:00 - EST 1969 42714343Swollman -5:00 US E%sT 1971 42814343Swollman -5:00 - EST 42914343SwollmanLink America/Indianapolis America/Indiana/Indianapolis 4302742Swollman# 43114343Swollman# Part of Crawford County, Indiana, last observed DST in 1975, 43214343Swollman# and left its clocks alone in 1974. 43314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 43414343SwollmanRule Marengo 1951 only - Apr lastSun 2:00 1:00 D 43514343SwollmanRule Marengo 1951 only - Sep lastSun 2:00 0 S 43614343SwollmanRule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D 43714343SwollmanRule Marengo 1954 1960 - Sep lastSun 2:00 0 S 43814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 43914343SwollmanZone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:00 44014343Swollman -6:00 US C%sT 1951 44114343Swollman -6:00 Marengo C%sT 1961 Apr 30 2:00 44214343Swollman -5:00 - EST 1969 44314343Swollman -5:00 US E%sT 1974 Jan 6 2:00 44414343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 44514343Swollman -5:00 US E%sT 1976 44614343Swollman -5:00 - EST 44714343Swollman# 44814343Swollman# Starke County, Indiana 44919878Swollman# From Arthur David Olson (1991-10-28): 45019878Swollman# An article on page A3 of the Sunday, 1991-10-27 Washington Post 45114343Swollman# notes that Starke County switched from Central time to Eastern time as of 45219878Swollman# 1991-10-27. 45314343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 45414343SwollmanRule Starke 1947 1961 - Apr lastSun 2:00 1:00 D 45514343SwollmanRule Starke 1947 1954 - Sep lastSun 2:00 0 S 45614343SwollmanRule Starke 1955 1956 - Oct lastSun 2:00 0 S 45714343SwollmanRule Starke 1957 1958 - Sep lastSun 2:00 0 S 45814343SwollmanRule Starke 1959 1961 - Oct lastSun 2:00 0 S 45914343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 46014343SwollmanZone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:00 46114343Swollman -6:00 US C%sT 1947 46214343Swollman -6:00 Starke C%sT 1962 Apr 29 2:00 46314343Swollman -5:00 - EST 1963 Oct 27 2:00 46414343Swollman -6:00 US C%sT 1991 Oct 27 2:00 46514343Swollman -5:00 - EST 46614343Swollman# 46714343Swollman# Switzerland County, Indiana, last observed DST in 1972. 46814343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 46914343SwollmanZone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:00 47014343Swollman -6:00 US C%sT 1954 Apr 25 2:00 47114343Swollman -5:00 - EST 1969 47214343Swollman -5:00 US E%sT 1973 47314343Swollman -5:00 - EST 4742742Swollman 47514343Swollman# Part of Kentucky left its clocks alone in 1974. 47667578Swollman# This also includes a part of Indiana immediately adjacent to Louisville. 47714343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 47814343SwollmanRule Louisville 1921 only - May 1 2:00 1:00 D 47914343SwollmanRule Louisville 1921 only - Sep 1 2:00 0 S 48014343SwollmanRule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D 48114343SwollmanRule Louisville 1941 only - Sep lastSun 2:00 0 S 48214343SwollmanRule Louisville 1946 only - Jun 2 2:00 0 S 48314343SwollmanRule Louisville 1950 1955 - Sep lastSun 2:00 0 S 48414343SwollmanRule Louisville 1956 1960 - Oct lastSun 2:00 0 S 48514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 48614343SwollmanZone America/Louisville -5:43:02 - LMT 1883 Nov 18 12:00 48714343Swollman -6:00 US C%sT 1921 48814343Swollman -6:00 Louisville C%sT 1942 48914343Swollman -6:00 US C%sT 1946 49014343Swollman -6:00 Louisville C%sT 1961 Jul 23 2:00 49114343Swollman -5:00 - EST 1968 49214343Swollman -5:00 US E%sT 1974 Jan 6 2:00 49314343Swollman -6:00 1:00 CDT 1974 Oct 27 2:00 49414343Swollman -5:00 US E%sT 49567578SwollmanLink America/Louisville America/Kentucky/Louisville 49667578Swollman# 49758787Sru# Wayne, Clinton, and Russell Counties, Kentucky 49858787Sru# 49958787Sru# From 50058787Sru# <a href="http://www.lake-cumberland.com/life/archive/news990129time.shtml"> 50158787Sru# Lake Cumberland LIFE 50258787Sru# </a> (1999-01-29) via WKYM-101.7: 50358787Sru# Clinton County has joined Wayne County in asking the DoT to change from 50458787Sru# the Central to the Eastern time zone.... The Wayne County government made 50558787Sru# the same request in December. And while Russell County officials have not 50658787Sru# taken action, the majority of respondents to a poll conducted there in 50758787Sru# August indicated they would like to change to "fast time" also. 50858787Sru# The three Lake Cumberland counties are the farthest east of any U.S. 50958787Sru# location in the Central time zone. 51067578Swollman# 51167578Swollman# From Rich Wales (2000-08-29): 51267578Swollman# After prolonged debate, and despite continuing deep differences of opinion, 51367578Swollman# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern 51475267Swollman# (-0500) time. They won't "fall back" this year. See Sara Shipley, 51575267Swollman# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). 51667578SwollmanZone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:00 51767578Swollman -6:00 US C%sT 1946 51867578Swollman -6:00 - CST 1968 51967578Swollman -6:00 US C%sT 2000 Oct 29 2:00 52067578Swollman -5:00 US E%sT 5212742Swollman 52267578Swollman 52367578Swollman# From Rives McDow (2000-08-30): 52467578Swollman# Here ... are all the changes in the US since 1985. 52567578Swollman# Kearny County, KS (put all of county on central; 52667578Swollman# previously split between MST and CST) ... 1990-10 52767578Swollman# Starke County, IN (from CST to EST) ... 1991-10 52867578Swollman# Oliver County, ND (from MST to CST) ... 1992-10 52967578Swollman# West Wendover, NV (from PST TO MST) ... 1999-10 53067578Swollman# Wayne County, KY (from CST to EST) ... 2000-10 53167578Swollman# There is another change in the offing; Mercer County, ND is looking 53267578Swollman# to change from MT to CT. It is possible that two other ND counties 53367578Swollman# (Sioux and Morton) will look to change also. If made, the earliest 53467578Swollman# a change would be effective is October 2001. 53567578Swollman# 53667578Swollman# From Paul Eggert (2000-10-02): 53767578Swollman# FIXME: I haven't yet had time to incorporate all the above changes. 53867578Swollman 53914343Swollman# Michigan 54014343Swollman# 54119878Swollman# From Bob Devine (1988-01-28): 54214343Swollman# Michigan didn't observe DST from 1968 to 1973. 54314343Swollman# 54458787Sru# From Paul Eggert (1999-03-31): 54558787Sru# Shanks writes that Michigan started using standard time on 1885-09-18, 54658787Sru# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) 54758787Sru# that Detroit kept 54814343Swollman# 54914343Swollman# local time until 1900 when the City Council decreed that clocks should 55014343Swollman# be put back twenty-eight minutes to Central Standard Time. Half the 55114343Swollman# city obeyed, half refused. After considerable debate, the decision 55214343Swollman# was rescinded and the city reverted to Sun time. A derisive offer to 55314343Swollman# erect a sundial in front of the city hall was referred to the 55414343Swollman# Committee on Sewers. Then, in 1905, Central time was adopted 55514343Swollman# by city vote. 55614343Swollman# 55714343Swollman# This story is too entertaining to be false, so go with Howse over Shanks. 55814343Swollman# 55975267Swollman# From Paul Eggert (2001-03-06): 56075267Swollman# Garland (1927) writes ``Cleveland and Detroit advanced their clocks 56175267Swollman# one hour in 1914.'' This change is not in Shanks. We have no more 56275267Swollman# info, so omit this for now. 56375267Swollman# 56414343Swollman# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. 56514343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 56614343SwollmanRule Detroit 1948 only - Apr lastSun 2:00 1:00 D 56714343SwollmanRule Detroit 1948 only - Sep lastSun 2:00 0 S 56814343SwollmanRule Detroit 1967 only - Jun 14 2:00 1:00 D 56914343SwollmanRule Detroit 1967 only - Oct lastSun 2:00 0 S 57014343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 57114343SwollmanZone America/Detroit -5:32:11 - LMT 1905 57214343Swollman -6:00 - CST 1915 May 15 2:00 57314343Swollman -5:00 - EST 1942 57414343Swollman -5:00 US E%sT 1946 57514343Swollman -5:00 Detroit E%sT 1973 57614343Swollman -5:00 US E%sT 1975 57714343Swollman -5:00 - EST 1975 Apr 27 2:00 57814343Swollman -5:00 US E%sT 57914343Swollman# 58014343Swollman# The Michigan border with Wisconsin switched from EST to CST/CDT in 1973. 58114343Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER 58214343SwollmanRule Menominee 1946 only - Apr lastSun 2:00 1:00 D 58314343SwollmanRule Menominee 1946 only - Sep lastSun 2:00 0 S 58414343SwollmanRule Menominee 1966 only - Apr lastSun 2:00 1:00 D 58514343SwollmanRule Menominee 1966 only - Oct lastSun 2:00 0 S 58614343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 58714343SwollmanZone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 58814343Swollman -6:00 US C%sT 1946 58914343Swollman -6:00 Menominee C%sT 1969 Apr 27 2:00 59014343Swollman -5:00 - EST 1973 Apr 29 2:00 59114343Swollman -6:00 US C%sT 59214343Swollman 5932742Swollman# Navassa 59443543Swollman# claimed by US under the provisions of the 1856 Guano Islands Act 59543543Swollman# also claimed by Haiti 59643543Swollman# occupied 1857/1900 by the Navassa Phosphate Co 59743543Swollman# US lighthouse 1917/1997-01 59843543Swollman# currently uninhabited 59943543Swollman# see Mark Fineman, ``An Isle Rich in Guano and Discord'', 60043543Swollman# _Los Angeles Times_ (1998-11-10), A1, A10; it cites 60143543Swollman# Jimmy Skaggs, _The Great Guano Rush_ (1994). 60214343Swollman 60319878Swollman# Old names, for S5 users 60419878Swollman 60519878Swollman# Link LINK-FROM LINK-TO 60619878SwollmanLink America/New_York EST5EDT 60719878SwollmanLink America/Chicago CST6CDT 60819878SwollmanLink America/Denver MST7MDT 60919878SwollmanLink America/Los_Angeles PST8PDT 61019878SwollmanLink America/Indianapolis EST 61119878SwollmanLink America/Phoenix MST 61219878SwollmanLink Pacific/Honolulu HST 61319878Swollman 6142742Swollman################################################################################ 6152742Swollman 6162742Swollman 61758787Sru# From Paul Eggert <eggert@twinsun.com> (1999-10-29): 61814343Swollman# A good source for time zone historical data outside the US is 61958787Sru# Thomas G. Shanks, The International Atlas (5th edition), 62058787Sru# San Diego: ACS Publications, Inc. (1999). 6212742Swollman# 62258787Sru# Gwillim Law <Gwil_Law@bridge-point.com> writes that a good source 62320094Swollman# for recent time zone data is the International Air Transport 62420094Swollman# Association's Standard Schedules Information Manual (IATA SSIM), 62520094Swollman# published semiannually. Law sent in several helpful summaries 62620094Swollman# of the IATA's data after 1990. 62720094Swollman# 62820094Swollman# Except where otherwise noted, Shanks is the source for entries through 1990, 62920094Swollman# and IATA SSIM is the source for entries after 1990. 63020094Swollman# 6312742Swollman# Another source occasionally used is Edward W. Whitman, World Time Differences, 6322742Swollman# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), which 6332742Swollman# I found in the UCLA library. 6342742Swollman# 6359908Swollman# See the `europe' file for Greenland. 6362742Swollman 6372742Swollman# Canada 6382742Swollman 6399908Swollman# From Alain LaBont<e'> <ALB@immedia.ca> (1994-11-14): 6409908Swollman# I post here the time zone abbreviations standardized in Canada 6419908Swollman# for both English and French in the CAN/CSA-Z234.4-89 standard.... 6429908Swollman# 6439908Swollman# UTC Standard time Daylight savings time 6449908Swollman# offset French English French English 6459908Swollman# -2:30 - - HAT NDT 6469908Swollman# -3 - - HAA ADT 6479908Swollman# -3:30 HNT NST - - 6489908Swollman# -4 HNA AST HAE EDT 6499908Swollman# -5 HNE EST HAC CDT 6509908Swollman# -6 HNC CST HAR MDT 6519908Swollman# -7 HNR MST HAP PDT 6529908Swollman# -8 HNP PST HAY YDT 6539908Swollman# -9 HNY YST - - 6549908Swollman# 6559908Swollman# HN: Heure Normale ST: Standard Time 6569908Swollman# HA: Heure Avanc<e'>e DT: Daylight saving Time 6579908Swollman# 6589908Swollman# A: de l'Atlantique Atlantic 6599908Swollman# C: du Centre Central 6609908Swollman# E: de l'Est Eastern 6619908Swollman# M: Mountain 6629908Swollman# N: Newfoundland 6639908Swollman# P: du Pacifique Pacific 6649908Swollman# R: des Rocheuses 6659908Swollman# T: de Terre-Neuve 6669908Swollman# Y: du Yukon Yukon 6679908Swollman# 6689908Swollman# From Paul Eggert <eggert@twinsun.com> (1994-11-22): 6699908Swollman# Alas, this sort of thing must be handled by localization software. 6702742Swollman 67167578Swollman# Unless otherwise specified, the data for Canada are all from Shanks. 6729908Swollman 67367578Swollman# From Paul Eggert (2000-10-02): 67467578Swollman# H. David Matthews and Mary Vincent's map 67567578Swollman# <a href="http://www.canadiangeographic.ca/SO98/geomap.htm"> 67667578Swollman# "It's about TIME", _Canadian Geographic_ (September-October 1998) 67767578Swollman# </a> contains detailed boundaries for regions observing nonstandard 67867578Swollman# time and daylight saving time arrangements in Canada circa 1998. 67967578Swollman# 68067578Swollman# INMS, the Institute for National Measurement Standards in Ottawa, has 68167578Swollman# <a href="http://www.nrc.ca/inms/time/tze.html"> 68267578Swollman# information about standard and daylight saving time zones in Canada. 68367578Swollman# </a> (updated periodically). 68467578Swollman# Its unofficial information is often taken from Matthews and Vincent. 6859908Swollman 6862742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 68717200SwollmanRule Canada 1918 only - Apr 14 2:00 1:00 D 68817200SwollmanRule Canada 1918 only - Oct 31 2:00 0 S 68975267SwollmanRule Canada 1942 only - Feb 9 2:00 1:00 W 69017200SwollmanRule Canada 1945 only - Sep 30 2:00 0 S 69117200SwollmanRule Canada 1974 1986 - Apr lastSun 2:00 1:00 D 69217200SwollmanRule Canada 1974 max - Oct lastSun 2:00 0 S 69317200SwollmanRule Canada 1987 max - Apr Sun>=1 2:00 1:00 D 69417200Swollman 69517200Swollman 69667578Swollman# Newfoundland (and far southeast Labrador) 69717200Swollman 69867578Swollman# From Paul Eggert (2000-10-02): 69967578Swollman# Matthews and Vincent (1998) write that Labrador should use NST/NDT, 70067578Swollman# but the only part of Labrador that follows the rules is the 70167578Swollman# southeast corner, including Port Hope Simpson and Mary's Harbour, 70267578Swollman# but excluding, say, Black Tickle. 70367578Swollman 70417200Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 7052742SwollmanRule StJohns 1917 1918 - Apr Sun>=8 2:00 1:00 D 7062742SwollmanRule StJohns 1917 only - Sep 17 2:00 0 S 7072742SwollmanRule StJohns 1918 only - Oct 31 2:00 0 S 7082742Swollman# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks. 7092742SwollmanRule StJohns 1919 only - May 5 23:00 1:00 D 7102742SwollmanRule StJohns 1919 only - Aug 12 23:00 0 S 7112742Swollman# For 1931-1935 Whitman gives Apr same date; go with Shanks. 7122742SwollmanRule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D 7132742SwollmanRule StJohns 1920 1935 - Oct lastSun 23:00 0 S 7142742Swollman# For 1936-1941 Shanks gives May Mon>=9 and Oct Mon>=2; go with Whitman. 7152742SwollmanRule StJohns 1936 1941 - May Sun>=8 0:00 1:00 D 7162742SwollmanRule StJohns 1936 1941 - Oct Sun>=1 0:00 0 S 7172742Swollman# Shanks gives 1942 May 11 - 1945 Sep 30; go with Whitman. 71875267SwollmanRule StJohns 1942 only - Mar 1 0:00 1:00 W 7192742SwollmanRule StJohns 1942 only - Dec 31 0:00 0 S 72075267SwollmanRule StJohns 1943 only - May 30 0:00 1:00 W 7212742SwollmanRule StJohns 1943 only - Sep 5 0:00 0 S 72275267SwollmanRule StJohns 1944 only - Jul 10 0:00 1:00 W 7232742SwollmanRule StJohns 1944 only - Sep 2 0:00 0 S 72475267SwollmanRule StJohns 1945 only - Jan 1 0:00 1:00 W 7252742SwollmanRule StJohns 1945 only - Oct 7 2:00 0 S 7262742Swollman# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives 7272742Swollman# Apr 30 - Sep 24; go with Shanks. 7282742SwollmanRule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D 7292742SwollmanRule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S 7302742SwollmanRule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D 7312742SwollmanRule StJohns 1951 1959 - Sep lastSun 2:00 0 S 73267578SwollmanRule StJohns 1960 1986 - Oct lastSun 2:00 0 S 73367578Swollman# From Paul Eggert (2000-10-02): 73467578Swollman# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches 73567578Swollman# at 00:01 local time. For now, assume it started in 1987. 73667578SwollmanRule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D 73767578SwollmanRule StJohns 1987 max - Oct lastSun 0:01 0 S 73867578SwollmanRule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD 73967578SwollmanRule StJohns 1989 max - Apr Sun>=1 0:01 1:00 D 7402742Swollman# St John's has an apostrophe, but Posix file names can't have apostrophes. 7412742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 7422742SwollmanZone America/St_Johns -3:30:52 - LMT 1884 74320094Swollman -3:30:52 StJohns N%sT 1935 Mar 30 7442742Swollman -3:30 StJohns N%sT 7452742Swollman 7468029Swollman 74767578Swollman# most of east Labrador 74817200Swollman 74920094Swollman# The name `Happy Valley-Goose Bay' is too long; use `Goose Bay'. 75020094Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 75120094SwollmanZone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay 75220094Swollman -3:30:52 StJohns NST 1919 75320094Swollman -3:30:52 - NST 1935 Mar 30 75420094Swollman -3:30 - NST 1936 75520094Swollman -3:30 StJohns N%sT 1966 Mar 15 2:00 75620094Swollman -4:00 StJohns A%sT 75720094Swollman 75820094Swollman 75920094Swollman# west Labrador, New Brunswick, Nova Scotia, Prince Edward I 76020094Swollman 76117200Swollman# From Paul Eggert (1996-06-12): 76217200Swollman# Shanks writes that since 1970 most of this region has been like Halifax. 76317200Swollman# Many locales did not observe peacetime DST until 1972; 76417200Swollman# Glace Bay, NS is the largest that we know of. 76517200Swollman# Shanks also writes that Liverpool, NS was the only town in Canada to observe 76617200Swollman# DST in 1971 but not 1970; for now we'll assume this is a typo. 76717200Swollman 76867578Swollman# From Paul Eggert (2000-10-02): 76967578Swollman# INMS (2000-09-12) says that, since 1988 at least, New Brunswick switches 77067578Swollman# at 00:01 local time. FIXME: verify and create a new Zone for this. 77167578Swollman 77267578Swollman 7732742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 7742742SwollmanRule Halifax 1916 only - Apr 1 0:00 1:00 D 7752742SwollmanRule Halifax 1916 only - Oct 1 0:00 0 S 7762742SwollmanRule Halifax 1918 only - Apr 14 2:00 1:00 D 7772742SwollmanRule Halifax 1918 only - Oct 31 2:00 0 S 7782742SwollmanRule Halifax 1920 only - May 9 0:00 1:00 D 7792742SwollmanRule Halifax 1920 only - Aug 29 0:00 0 S 7802742SwollmanRule Halifax 1921 only - May 6 0:00 1:00 D 7812742SwollmanRule Halifax 1921 1922 - Sep 5 0:00 0 S 7822742SwollmanRule Halifax 1922 only - Apr 30 0:00 1:00 D 7832742SwollmanRule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D 7842742SwollmanRule Halifax 1923 only - Sep 4 0:00 0 S 7852742SwollmanRule Halifax 1924 only - Sep 15 0:00 0 S 7862742SwollmanRule Halifax 1925 only - Sep 28 0:00 0 S 7872742SwollmanRule Halifax 1926 only - May 16 0:00 1:00 D 7882742SwollmanRule Halifax 1926 only - Sep 13 0:00 0 S 7892742SwollmanRule Halifax 1927 only - May 1 0:00 1:00 D 7902742SwollmanRule Halifax 1927 only - Sep 26 0:00 0 S 7912742SwollmanRule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D 7922742SwollmanRule Halifax 1928 only - Sep 9 0:00 0 S 7932742SwollmanRule Halifax 1929 only - Sep 3 0:00 0 S 7942742SwollmanRule Halifax 1930 only - Sep 15 0:00 0 S 7952742SwollmanRule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S 7962742SwollmanRule Halifax 1933 only - Apr 30 0:00 1:00 D 7972742SwollmanRule Halifax 1933 only - Oct 2 0:00 0 S 7982742SwollmanRule Halifax 1934 only - May 20 0:00 1:00 D 7992742SwollmanRule Halifax 1934 only - Sep 16 0:00 0 S 8002742SwollmanRule Halifax 1935 only - Jun 2 0:00 1:00 D 8012742SwollmanRule Halifax 1935 only - Sep 30 0:00 0 S 8022742SwollmanRule Halifax 1936 only - Jun 1 0:00 1:00 D 8032742SwollmanRule Halifax 1936 only - Sep 14 0:00 0 S 8042742SwollmanRule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D 8052742SwollmanRule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S 8062742SwollmanRule Halifax 1939 only - May 28 0:00 1:00 D 8072742SwollmanRule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D 80875267SwollmanRule Halifax 1942 only - Feb 9 2:00 1:00 W 8092742SwollmanRule Halifax 1945 1959 - Sep lastSun 2:00 0 S 8102742SwollmanRule Halifax 1946 1959 - Apr lastSun 2:00 1:00 D 8112742SwollmanRule Halifax 1962 1986 - Apr lastSun 2:00 1:00 D 8122742SwollmanRule Halifax 1962 max - Oct lastSun 2:00 0 S 8132742SwollmanRule Halifax 1987 max - Apr Sun>=1 2:00 1:00 D 8142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8152742SwollmanZone America/Halifax -4:14:24 - LMT 1902 Jun 15 8162742Swollman -4:00 Halifax A%sT 81717200SwollmanZone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 81817200Swollman -4:00 Canada A%sT 1953 81917200Swollman -4:00 Halifax A%sT 1954 82017200Swollman -4:00 - AST 1972 82117200Swollman -4:00 Halifax A%sT 8222742Swollman 8238029Swollman 82417200Swollman# Ontario, Quebec 82517200Swollman 82617200Swollman# From Paul Eggert (1996-06-12): 82717200Swollman# Shanks writes that since 1970 most of this region has been like Montreal. 82817200Swollman# Thunder Bay skipped DST in 1973. 82917200Swollman# Many smaller locales did not observe peacetime DST until 1974; 83017200Swollman# Nipigon (EST) and Rainy River (CST) are the largest that we know of. 83117200Swollman# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. 83217200Swollman 83343014Swollman# From Paul Eggert (1997-10-17): 83443014Swollman# msb@sq.com writes that an article in the 1997-10-14 Toronto Star 83543014Swollman# says that Atikokan, Ontario currently does not observe DST, 83643014Swollman# but will vote on 11-10 whether to use EST/EDT. 83743014Swollman# He also writes that the 83843014Swollman# <a href="http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html"> 83943014Swollman# Ontario Time Act (1990, Chapter T.9) 84043014Swollman# </a> 84143014Swollman# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. 84243014Swollman# Officially Atikokan is therefore on CST/CDT, and most likely this report 84343014Swollman# concerns a non-official time observed as a matter of local practice. 84458787Sru# For what it's worth, Shanks says that Atikokan has agreed with 84543014Swollman# Rainy River ever since standard time was introduced. 84643014Swollman 84767578Swollman# From Paul Eggert (2000-10-02): 84867578Swollman# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and 84967578Swollman# New Osnaburgh observe CST all year, that Big Trout Lake observes 85067578Swollman# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in 85167578Swollman# violation of the official Ontario rules. 85267578Swollman# They also write that Quebec east of the -63 meridian is supposed to 85367578Swollman# observe AST, but residents as far east as Natashquan use EST/EDT, 85467578Swollman# and residents east of Natashquan use AST. 85567578Swollman# We probably need Zones for far east Quebec and for Atikokan, 85667578Swollman# but we don't know when their practices started. 85767578Swollman 8582742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 8592742SwollmanRule Mont 1917 only - Mar 25 2:00 1:00 D 8602742SwollmanRule Mont 1917 only - Apr 24 0:00 0 S 8612742SwollmanRule Mont 1918 only - Apr 14 2:00 1:00 D 8622742SwollmanRule Mont 1918 only - Oct 31 2:00 0 S 8632742SwollmanRule Mont 1919 only - Mar 31 2:30 1:00 D 8642742SwollmanRule Mont 1919 only - Oct 25 2:30 0 S 8652742SwollmanRule Mont 1920 only - May 2 2:30 1:00 D 8662742SwollmanRule Mont 1920 only - Oct 3 2:30 0 S 8672742SwollmanRule Mont 1921 only - May 1 2:00 1:00 D 8682742SwollmanRule Mont 1921 only - Oct 2 2:30 0 S 8692742SwollmanRule Mont 1922 only - Apr 30 2:00 1:00 D 8702742SwollmanRule Mont 1922 only - Oct 1 2:30 0 S 8712742SwollmanRule Mont 1924 only - May 17 2:00 1:00 D 8722742SwollmanRule Mont 1924 1926 - Sep lastSun 2:30 0 S 8732742SwollmanRule Mont 1925 1926 - May Sun>=1 2:00 1:00 D 8742742SwollmanRule Mont 1927 only - May 1 0:00 1:00 D 8752742SwollmanRule Mont 1927 1932 - Sep Sun>=25 0:00 0 S 8762742SwollmanRule Mont 1928 1931 - Apr Sun>=25 0:00 1:00 D 8772742SwollmanRule Mont 1932 only - May 1 0:00 1:00 D 8782742SwollmanRule Mont 1933 1940 - Apr Sun>=24 0:00 1:00 D 8792742SwollmanRule Mont 1933 only - Oct 1 0:00 0 S 8802742SwollmanRule Mont 1934 1939 - Sep Sun>=24 0:00 0 S 8812742SwollmanRule Mont 1945 1948 - Sep lastSun 2:00 0 S 8822742SwollmanRule Mont 1946 1986 - Apr lastSun 2:00 1:00 D 8832742SwollmanRule Mont 1949 1950 - Oct lastSun 2:00 0 S 8842742SwollmanRule Mont 1951 1956 - Sep lastSun 2:00 0 S 8852742SwollmanRule Mont 1957 max - Oct lastSun 2:00 0 S 8862742SwollmanRule Mont 1987 max - Apr Sun>=1 2:00 1:00 D 8872742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 8882742SwollmanZone America/Montreal -4:54:16 - LMT 1884 8892742Swollman -5:00 Mont E%sT 89017200SwollmanZone America/Thunder_Bay -5:57:00 - LMT 1895 89117200Swollman -5:00 Canada E%sT 1970 89217200Swollman -5:00 Mont E%sT 1973 89317200Swollman -5:00 - EST 1974 89417200Swollman -5:00 Canada E%sT 89517200SwollmanZone America/Nipigon -5:53:04 - LMT 1895 89617200Swollman -5:00 Canada E%sT 89717200SwollmanZone America/Rainy_River -6:17:56 - LMT 1895 89817200Swollman -6:00 Canada C%sT 8992742Swollman 9008029Swollman 90117200Swollman# Manitoba 90219878Swollman 9032742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 9042742SwollmanRule Winn 1916 only - Apr 23 0:00 1:00 D 9052742SwollmanRule Winn 1916 only - Sep 17 0:00 0 S 9062742SwollmanRule Winn 1918 only - Apr 14 2:00 1:00 D 9072742SwollmanRule Winn 1918 only - Oct 31 2:00 0 S 9082742SwollmanRule Winn 1937 only - May 16 2:00 1:00 D 90914343SwollmanRule Winn 1937 only - Sep 26 2:00 0 S 91075267SwollmanRule Winn 1942 only - Feb 9 2:00 1:00 W 9112742SwollmanRule Winn 1945 only - Sep lastSun 2:00 0 S 9122742SwollmanRule Winn 1946 only - May 12 2:00 1:00 D 9132742SwollmanRule Winn 1946 only - Oct 13 2:00 0 S 9142742SwollmanRule Winn 1947 1949 - Apr lastSun 2:00 1:00 D 91514343SwollmanRule Winn 1947 1949 - Sep lastSun 2:00 0 S 91614343SwollmanRule Winn 1950 only - May 1 2:00 1:00 D 91714343SwollmanRule Winn 1950 only - Sep 30 2:00 0 S 91814343SwollmanRule Winn 1951 1960 - Apr lastSun 2:00 1:00 D 91914343SwollmanRule Winn 1951 1958 - Sep lastSun 2:00 0 S 9202742SwollmanRule Winn 1959 only - Oct lastSun 2:00 0 S 9212742SwollmanRule Winn 1960 only - Sep lastSun 2:00 0 S 9222742SwollmanRule Winn 1963 only - Apr lastSun 2:00 1:00 D 92314343SwollmanRule Winn 1963 only - Sep 22 2:00 0 S 9242742SwollmanRule Winn 1966 1986 - Apr lastSun 2:00 1:00 D 92567578SwollmanRule Winn 1966 1986 - Oct lastSun 2:00 0 S 9262742SwollmanRule Winn 1987 max - Apr Sun>=1 2:00 1:00 D 92767578Swollman# From Paul Eggert (2000-10-02): 92867578Swollman# INMS (2000-09-12) says that, since 1988 at least, Manitoba switches from 92967578Swollman# DST at 03:00 local time. For now, assume it started in 1987. 93067578SwollmanRule Winn 1987 max - Oct lastSun 2:00s 0 S 9312742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 9322742SwollmanZone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 9332742Swollman -6:00 Winn C%sT 9342742Swollman 9358029Swollman 93617200Swollman# Saskatchewan 93717200Swollman 93867578Swollman# From Paul Eggert (2000-10-02): 93917200Swollman# Shanks writes that since 1970 most of this region has been like Regina. 94017200Swollman# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. 94117200Swollman# Other western towns (e.g. Lloydminster) are like Edmonton. 94267578Swollman# Matthews and Vincent (1998) write that Denare Beach and Creighton 94367578Swollman# are like Winnipeg, in violation of Saskatchewan law. 94417200Swollman 94519878Swollman# From W. Jones <jones@skdad.usask.ca> (1992-11-06): 94617200Swollman# The. . .below is based on information I got from our law library, the 94717200Swollman# provincial archives, and the provincial Community Services department. 94817200Swollman# A precise history would require digging through newspaper archives, and 94917200Swollman# since you didn't say what you wanted, I didn't bother. 95017200Swollman# 95117200Swollman# Saskatchewan is split by a time zone meridian (105W) and over the years 95217200Swollman# the boundary became pretty ragged as communities near it reevaluated 95317200Swollman# their affiliations in one direction or the other. In 1965 a provincial 95417200Swollman# referendum favoured legislating common time practices. 95517200Swollman# 95617200Swollman# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of 95717200Swollman# Saskatchewan 1978) was proclaimed, and established that the eastern 95817200Swollman# part of Saskatchewan would use CST year round, that districts in 95917200Swollman# northwest Saskatchewan would by default follow CST but could opt to 96017200Swollman# follow Mountain Time rules (thus 1 hour difference in the winter and 96117200Swollman# zero in the summer), and that districts in southwest Saskatchewan would 96217200Swollman# by default follow MT but could opt to follow CST. 96317200Swollman# 96417200Swollman# It took a few years for the dust to settle (I know one story of a town 96517200Swollman# on one time zone having its school in another, such that a mom had to 96617200Swollman# serve her family lunch in two shifts), but presently it seems that only 96717200Swollman# a few towns on the border with Alberta (e.g. Lloydminster) follow MT 96817200Swollman# rules any more; all other districts appear to have used CST year round 96917200Swollman# since sometime in the 1960s. 97017200Swollman 9712742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 9722742SwollmanRule Regina 1918 only - Apr 14 2:00 1:00 D 9732742SwollmanRule Regina 1918 only - Oct 31 2:00 0 S 9742742SwollmanRule Regina 1930 1934 - May Sun>=1 0:00 1:00 D 9752742SwollmanRule Regina 1930 1934 - Oct Sun>=1 0:00 0 S 9762742SwollmanRule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D 9772742SwollmanRule Regina 1937 only - Oct Sun>=8 0:00 0 S 9782742SwollmanRule Regina 1938 only - Oct Sun>=1 0:00 0 S 9792742SwollmanRule Regina 1939 1941 - Oct Sun>=8 0:00 0 S 98075267SwollmanRule Regina 1942 only - Feb 9 2:00 1:00 W 9812742SwollmanRule Regina 1945 only - Sep lastSun 2:00 0 S 98217200SwollmanRule Regina 1946 only - Apr Sun>=8 2:00 1:00 D 98317200SwollmanRule Regina 1946 only - Oct Sun>=8 2:00 0 S 98417200SwollmanRule Regina 1947 1959 - Apr lastSun 2:00 1:00 D 98517200SwollmanRule Regina 1947 1958 - Sep lastSun 2:00 0 S 98617200SwollmanRule Regina 1959 only - Oct lastSun 2:00 0 S 98717200Swollman# 98817200SwollmanRule Swift 1957 only - Apr lastSun 2:00 1:00 D 98917200SwollmanRule Swift 1957 only - Oct lastSun 2:00 0 S 99017200SwollmanRule Swift 1959 1961 - Apr lastSun 2:00 1:00 D 99117200SwollmanRule Swift 1959 only - Oct lastSun 2:00 0 S 99217200SwollmanRule Swift 1960 1961 - Sep lastSun 2:00 0 S 9932742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 99417200SwollmanZone America/Regina -6:58:36 - LMT 1905 Sep 99517200Swollman -7:00 Regina M%sT 1960 Apr lastSun 2:00 9962742Swollman -6:00 - CST 99717200SwollmanZone America/Swift_Current -7:11:20 - LMT 1905 Sep 99817200Swollman -7:00 Canada M%sT 1946 Apr lastSun 2:00 99917200Swollman -7:00 Regina M%sT 1950 100017200Swollman -7:00 Swift M%sT 1972 Apr lastSun 2:00 100117200Swollman -6:00 - CST 10022742Swollman 10038029Swollman 100417200Swollman# Alberta 100517200Swollman 10062742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 10072742SwollmanRule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D 10082742SwollmanRule Edm 1918 only - Oct 31 2:00 0 S 10092742SwollmanRule Edm 1919 only - May 27 2:00 0 S 10102742SwollmanRule Edm 1920 1923 - Apr lastSun 2:00 1:00 D 10112742SwollmanRule Edm 1920 only - Oct lastSun 2:00 0 S 10122742SwollmanRule Edm 1921 1923 - Sep lastSun 2:00 0 S 101375267SwollmanRule Edm 1942 only - Feb 9 2:00 1:00 W 10142742SwollmanRule Edm 1945 only - Sep lastSun 2:00 0 S 10152742SwollmanRule Edm 1947 only - Apr lastSun 2:00 1:00 D 10162742SwollmanRule Edm 1947 only - Sep lastSun 2:00 0 S 10172742SwollmanRule Edm 1967 only - Apr lastSun 2:00 1:00 D 10182742SwollmanRule Edm 1967 only - Oct lastSun 2:00 0 S 10192742SwollmanRule Edm 1969 only - Apr lastSun 2:00 1:00 D 10202742SwollmanRule Edm 1969 only - Oct lastSun 2:00 0 S 10212742SwollmanRule Edm 1972 1986 - Apr lastSun 2:00 1:00 D 10222742SwollmanRule Edm 1972 max - Oct lastSun 2:00 0 S 10232742SwollmanRule Edm 1987 max - Apr Sun>=1 2:00 1:00 D 10242742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10252742SwollmanZone America/Edmonton -7:33:52 - LMT 1906 Sep 10262742Swollman -7:00 Edm M%sT 10272742Swollman 10288029Swollman 102917200Swollman# British Columbia 103017200Swollman 103167578Swollman# From Paul Eggert (2000-10-02): 103217200Swollman# Shanks writes that since 1970 most of this region has been like Vancouver. 103358787Sru# Dawson Creek uses MST. Much of east BC is like Edmonton. 103467578Swollman# Matthews and Vincent (1998) write that Creston is like Dawson Creek. 103517200Swollman 10362742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 10372742SwollmanRule Vanc 1918 only - Apr 14 2:00 1:00 D 10382742SwollmanRule Vanc 1918 only - Oct 31 2:00 0 S 103975267SwollmanRule Vanc 1942 only - Feb 9 2:00 1:00 W 10402742SwollmanRule Vanc 1945 only - Sep 30 2:00 0 S 10412742SwollmanRule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D 10422742SwollmanRule Vanc 1946 only - Oct 13 2:00 0 S 10432742SwollmanRule Vanc 1947 1961 - Sep lastSun 2:00 0 S 10442742SwollmanRule Vanc 1962 max - Oct lastSun 2:00 0 S 10452742SwollmanRule Vanc 1987 max - Apr Sun>=1 2:00 1:00 D 10462742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 10472742SwollmanZone America/Vancouver -8:12:28 - LMT 1884 10482742Swollman -8:00 Vanc P%sT 104917200SwollmanZone America/Dawson_Creek -8:00:56 - LMT 1884 105017200Swollman -8:00 Canada P%sT 1947 105117200Swollman -8:00 Vanc P%sT 1972 Aug 30 2:00 105217200Swollman -7:00 - MST 10532742Swollman 10548029Swollman 105558787Sru# Northwest Territories, Nunavut, Yukon 105617200Swollman 105758787Sru# From Paul Eggert (1999-10-29): 105817200Swollman# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. 105920094Swollman# Mathew Englander <mathew@io.org> (1996-10-07) gives the following refs: 106020094Swollman# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, 106120094Swollman# c. 7 defines Yukon standard time as UTC-9. This is still valid; 106220094Swollman# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). 106320094Swollman# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. 106420094Swollman# * O.I.C. 1980/02 established DST. 106520094Swollman# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. 106620094Swollman# Shanks says Yukon's 1973-10-28 switch was at 2:00; go with Englander. 106717200Swollman 106858787Sru# From Rives McDow (1999-09-04): 106958787Sru# Nunavut ... moved ... to incorporate the whole territory into one time zone. 107058787Sru# <a href="http://www.nunatsiaq.com/nunavut/nvt90903_13.html"> 107158787Sru# Nunavut moves to single time zone Oct. 31 107258787Sru# </a> 107358787Sru# 107458787Sru# From Antoine Leca (1999-09-06): 107558787Sru# We then need to create a new timezone for the Kitikmeot region of Nunavut 107658787Sru# to differentiate it from the Yellowknife region. 107758787Sru 107858787Sru# From Paul Eggert (1999-09-20): 107958787Sru# <a href="http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html"> 108058787Sru# Basic Facts: The New Territory 108158787Sru# </a> (1999) reports that Pangnirtung operates on Eastern time, 108258787Sru# and that Coral Harbour does not observe DST. We don't know when 108358787Sru# Pangnirtung switched to Eastern time; we'll guess 1995. 108458787Sru# We'll ignore the claim about Coral Harbour for now, 108558787Sru# since we have no further info. 108658787Sru 108758787Sru# From Rives McDow (1999-11-08): 108858787Sru# On October 31, when the rest of Nunavut went to Central time, 108958787Sru# Pangnirtung wobbled. Here is the result of their wobble: 109058787Sru# 109158787Sru# The following businesses and organizations in Pangnirtung use Central Time: 109258787Sru# 109358787Sru# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, 109458787Sru# Eastern Arctic National Parks, A & D Specialist 109558787Sru# 109658787Sru# The following businesses and organizations in Pangnirtung use Eastern Time: 109758787Sru# 109858787Sru# Hamlet office, All other businesses, Both schools, Airport operator 109958787Sru# 110058787Sru# This has made for an interesting situation there, which warranted the news. 110158787Sru# No one there that I spoke with seems concerned, or has plans to 110258787Sru# change the local methods of keeping time, as it evidently does not 110358787Sru# really interfere with any activities or make things difficult locally. 110458787Sru# They plan to celebrate New Year's turn-over twice, one hour apart, 110558787Sru# so it appears that the situation will last at least that long. 110658787Sru# The Nunavut Intergovernmental Affairs hopes that they will "come to 110758787Sru# their senses", but the locals evidently don't see any problem with 110858787Sru# the current state of affairs. 110958787Sru 111058787Sru# From Michaela Rodrigue, writing in the 111158787Sru# <a href="http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html"> 111258787Sru# Nunatsiaq News (1999-11-19)</a>: 111358787Sru# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, 111458787Sru# central - or Nunavut time - for government offices, and eastern time 111558787Sru# for municipal offices and schools.... Igloolik [was similar but then] 111658787Sru# made the switch to central time on Saturday, Nov. 6. 111758787Sru 111867578Swollman# From Paul Eggert (2000-10-02): 111967578Swollman# Matthews and Vincent (1998) say the following, but we lack histories 112067578Swollman# for these potential new Zones. 112175267Swollman# 112267578Swollman# The Canadian Forces station at Alert uses Eastern Time while the 112367578Swollman# handful of residents at the Eureka weather station [in the Central 112467578Swollman# zone] skip daylight savings. Baffin Island, which is crossed by the 112567578Swollman# Central, Eastern and Atlantic Time zones only uses Eastern Time. 112667578Swollman# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of 112767578Swollman# Central Time and Southampton Island [in the Central zone] is not 112867578Swollman# required to use daylight savings. 112967578Swollman 113075267Swollman# From 113175267Swollman# <a href="http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html"> 113275267Swollman# Nunavut now has two time zones 113375267Swollman# </a> (2000-11-10): 113475267Swollman# The Nunavut government would allow its employees in Kugluktuk and 113575267Swollman# Cambridge Bay to operate on central time year-round, putting them 113675267Swollman# one hour behind the rest of Nunavut for six months during the winter. 113775267Swollman# At the end of October the two communities had rebelled against 113875267Swollman# Nunavut's unified time zone, refusing to shift to eastern time with 113975267Swollman# the rest of the territory for the winter. Cambridge Bay remained on 114075267Swollman# central time, while Kugluktuk, even farther west, reverted to 114175267Swollman# mountain time, which they had used before the advent of Nunavut's 114275267Swollman# unified time zone in 1999. 114375267Swollman# 114475267Swollman# From Rives McDow (2001-01-20), quoting the Nunavut government: 114575267Swollman# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. 114675267Swollman 114775267Swollman# From Paul Eggert (2000-12-04): 114875267Swollman# Let's just keep track of the official times for now. 114975267Swollman 115075267Swollman# From Rives McDow (2001-03-07): 115175267Swollman# The premier of Nunavut has issued a ministerial statement advising 115275267Swollman# that effective 2001-04-01, the territory of Nunavut will revert 115375267Swollman# back to three time zones (mountain, central, and eastern). Of the 115475267Swollman# cities in Nunavut, Coral Harbor is the only one that I know of that 115575267Swollman# has said it will not observe dst, staying on EST year round. I'm 115675267Swollman# checking for more info, and will get back to you if I come up with 115775267Swollman# more. 115875267Swollman# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] 115975267Swollman 11602742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 116117200SwollmanRule NT_YK 1918 only - Apr 14 2:00 1:00 D 116217200SwollmanRule NT_YK 1918 only - Oct 27 2:00 0 S 116317200SwollmanRule NT_YK 1919 only - May 25 2:00 1:00 D 116417200SwollmanRule NT_YK 1919 only - Nov 1 0:00 0 S 116575267SwollmanRule NT_YK 1942 only - Feb 9 2:00 1:00 W 116617200SwollmanRule NT_YK 1945 only - Sep 30 2:00 0 S 116717200SwollmanRule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD 116817200SwollmanRule NT_YK 1965 only - Oct lastSun 2:00 0 S 116917200SwollmanRule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D 117017200SwollmanRule NT_YK 1980 max - Oct lastSun 2:00 0 S 117117200SwollmanRule NT_YK 1987 max - Apr Sun>=1 2:00 1:00 D 11722742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 117317200SwollmanZone America/Pangnirtung -4:22:56 - LMT 1884 117458787Sru -4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 117558787Sru -5:00 Canada E%sT 1999 Oct 31 2:00 117675267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 117775267Swollman -5:00 Canada E%sT 117858787SruZone America/Iqaluit -4:33:52 - LMT 1884 # Frobisher Bay before 1987 117958787Sru -5:00 NT_YK E%sT 1999 Oct 31 2:00 118075267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 118175267Swollman -5:00 Canada E%sT 118275267SwollmanZone America/Rankin_Inlet -6:08:40 - LMT 1884 118375267Swollman -6:00 NT_YK C%sT 2000 Oct 29 2:00 118475267Swollman -5:00 - EST 2001 Apr 1 3:00 118558787Sru -6:00 Canada C%sT 118658787SruZone America/Cambridge_Bay -7:00:20 - LMT 1884 118758787Sru -7:00 NT_YK M%sT 1999 Oct 31 2:00 118875267Swollman -6:00 Canada C%sT 2000 Oct 29 2:00 118975267Swollman -5:00 - EST 2000 Nov 5 0:00 119075267Swollman -6:00 - CST 2001 Apr 1 3:00 119175267Swollman -7:00 Canada M%sT 119217200SwollmanZone America/Yellowknife -7:37:24 - LMT 1884 119317200Swollman -7:00 NT_YK M%sT 119417200SwollmanZone America/Inuvik -8:54:00 - LMT 1884 119517200Swollman -8:00 NT_YK P%sT 1979 Apr lastSun 2:00 119617200Swollman -7:00 NT_YK M%sT 11972742SwollmanZone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 119817200Swollman -9:00 NT_YK Y%sT 1966 Jul 1 2:00 119917200Swollman -8:00 NT_YK P%sT 120017200SwollmanZone America/Dawson -9:17:40 - LMT 1900 Aug 20 120120094Swollman -9:00 NT_YK Y%sT 1973 Oct 28 0:00 120217200Swollman -8:00 NT_YK P%sT 12032742Swollman 12048029Swollman 12052742Swollman############################################################################### 12062742Swollman 12072742Swollman# Mexico 12082742Swollman 120975267Swollman# From Paul Eggert (2001-03-05): 121075267Swollman# The Investigation and Analysis Service of the 121175267Swollman# Mexican Library of Congress (MLoC) has published a 121275267Swollman# <a href="http://www.cddhcu.gob.mx/bibliot/publica/inveyana/polisoc/horver/"> 121375267Swollman# history of Mexican local time (in Spanish) 121475267Swollman# </a>. 12152742Swollman# 121675267Swollman# Here are the discrepancies between Shanks and the MLoC. 121775267Swollman# (In all cases we go with the MLoC.) 121875267Swollman# Shanks reports that Baja was at -8:00 in 1922/1923. 121975267Swollman# Shanks says the 1930 transition in Baja was 1930-11-16. 122075267Swollman# Shanks reports no DST during summer 1931. 122175267Swollman# Shanks reports a transition at 1032-03-30 23:00, not 1932-04-01. 122275267Swollman# Shanks does not report transitions for Baja in 1945 or 1948. 122375267Swollman# Shanks reports southern Mexico transitions on 1981-12-01, not 12-23. 122475267Swollman# Shanks says Quintana Roo switched to -6:00 on 1982-12-02, and to -5:00 122575267Swollman# on 1997-10-26 at 02:00. 12262742Swollman 122775267Swollman# From Gwillim Law (2001-02-20): 122875267Swollman# There are some other discrepancies between the Decrees page and the 122975267Swollman# tz database. I think they can best be explained by supposing that 123075267Swollman# the researchers who prepared the Decrees page failed to find some of 123175267Swollman# the relevant documents. 123275267Swollman 123364499Swollman# From Paul Eggert (2000-07-26): 123464499Swollman# Shanks gives 1942-04-01 instead of 1942-04-24, and omits the 1981 123564499Swollman# and 1988 DST experiments. Go with spin.com.mx. 12362742Swollman 123717200Swollman# From Alan Perry <alan.perry@eng.sun.com> (1996-02-15): 123817200Swollman# A guy from our Mexico subsidiary finally found the Presidential Decree 123917200Swollman# outlining the timezone changes in Mexico. 124058787Sru# 124117200Swollman# ------------- Begin Forwarded Message ------------- 124258787Sru# 124317200Swollman# I finally got my hands on the Official Presidential Decree that sets up the 124417200Swollman# rules for the DST changes. The rules are: 124558787Sru# 124617200Swollman# 1. The country is divided in 3 timezones: 124717200Swollman# - Baja California Norte (the Mexico/BajaNorte TZ) 124817200Swollman# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) 124917200Swollman# - The rest of the country (the Mexico/General TZ) 125058787Sru# 125117200Swollman# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October 125217200Swollman# at 2:00 AM, the times in each zone are as follows: 125317200Swollman# BajaNorte: GMT+7 125417200Swollman# BajaSur: GMT+6 125517200Swollman# General: GMT+5 125658787Sru# 125717200Swollman# 3. The rest of the year, the times are as follows: 125817200Swollman# BajaNorte: GMT+8 125917200Swollman# BajaSur: GMT+7 126017200Swollman# General: GMT+6 126158787Sru# 126217200Swollman# The Decree was published in Mexico's Official Newspaper on January 4th. 126358787Sru# 126417200Swollman# -------------- End Forwarded Message -------------- 126517200Swollman# From Paul Eggert (1996-06-12): 126643014Swollman# For an English translation of the decree, see 126743014Swollman# <a href="http://mexico-travel.com/extra/timezone_eng.html"> 126843014Swollman# ``Diario Oficial: Time Zone Changeover'' (1996-01-04). 126943014Swollman# </a> 127014343Swollman 127143543Swollman# From Rives McDow (1998-10-08): 127243543Swollman# The State of Quintana Roo has reverted back to central STD and DST times 127343543Swollman# (i.e. UTC -0600 and -0500 as of 1998-08-02). 127443543Swollman 127558787Sru# From Rives McDow (2000-01-10): 127658787Sru# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time 127758787Sru# zone 5 hours from the International Date Line, and will not observe daylight 127858787Sru# savings time so as to stay on the same time zone as the southern part of 127958787Sru# Arizona year round. 128058787Sru 128175267Swollman# From Jesper Norgaard, translating 128275267Swollman# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): 128375267Swollman# In Oaxaca, the 55.000 teachers from the Section 22 of the National 128475267Swollman# Syndicate of Education Workers, refuse to apply daylight saving each 128575267Swollman# year, so that the more than 10,000 schools work at normal hour the 128675267Swollman# whole year. 128775267Swollman 128875267Swollman# From Gwillim Law (2001-01-19): 128975267Swollman# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says 129075267Swollman# (translated):... 129175267Swollman# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced 129275267Swollman# that Summer Time will be reduced from seven to five months, starting 129375267Swollman# this year.... 129475267Swollman# <http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001> 129575267Swollman# [translated], says "summer time will ... take effect on the first Sunday 129675267Swollman# in May, and end on the last Sunday of September. 129775267Swollman 129875267Swollman# From Arthur David Olson (2001-01-25): 129975267Swollman# The 2001-01-24 traditional Washington Post contained the page one 130075267Swollman# story "Timely Issue Divides Mexicans."... 130175267Swollman# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html 130275267Swollman# ... Mexico City Mayor Lopez Obrador "...is threatening to keep 130375267Swollman# Mexico City and its 20 million residents on a different time than 130475267Swollman# the rest of the country..." In particular, Lopez Obrador would abolish 130575267Swollman# observation of Daylight Saving Time. 130675267Swollman 130775267Swollman# <a href="http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre"> 130875267Swollman# Official statute published by the Energy Department 130975267Swollman# </a> (2001-02-01) shows Baja and Chihauhua as still using US DST rules, 131075267Swollman# and Sonora with no DST. This was reported by Jesper Norgaard (2001-02-03). 131175267Swollman 131275267Swollman# From Paul Eggert (2001-03-03): 131375267Swollman# 131475267Swollman# <a href="http://www.latimes.com/news/nation/20010303/t000018766.html"> 131575267Swollman# James F. Smith writes in today's LA Times 131675267Swollman# </a> 131775267Swollman# * Sonora will continue to observe standard time. 131875267Swollman# * Last week Mexico City's mayor Andres Manuel Lopez Obrador decreed that 131975267Swollman# the Federal District will not adopt DST. 132075267Swollman# * 4 of 16 district leaders announced they'll ignore the decree. 132175267Swollman# * The decree does not affect federal-controlled facilities including 132275267Swollman# the airport, banks, hospitals, and schools. 132375267Swollman# 132475267Swollman# For now we'll assume that the Federal District will bow to federal rules. 132575267Swollman 132675267Swollman# From Jesper Norgaard (2001-04-01): 132775267Swollman# I found some references to the Mexican application of daylight 132875267Swollman# saving, which modifies what I had already sent you, stating earlier 132975267Swollman# that a number of northern Mexican states would go on daylight 133075267Swollman# saving. The modification reverts this to only cover Baja California 133175267Swollman# (Norte), while all other states (except Sonora, who has no daylight 133275267Swollman# saving all year) will follow the original decree of president 133375267Swollman# Vicente Fox, starting daylight saving May 6, 2001 and ending 133475267Swollman# September 30, 2001. 133575267Swollman# References: "Diario de Monterrey" <www.diariodemonterrey.com/index.asp> 133675267Swollman# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) 133775267Swollman 13382742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 13392742SwollmanRule Mexico 1939 only - Feb 5 0:00 1:00 D 13402742SwollmanRule Mexico 1939 only - Jun 25 0:00 0 S 13412742SwollmanRule Mexico 1940 only - Dec 9 0:00 1:00 D 13422742SwollmanRule Mexico 1941 only - Apr 1 0:00 0 S 134375267SwollmanRule Mexico 1943 only - Dec 16 0:00 1:00 W 13442742SwollmanRule Mexico 1944 only - May 1 0:00 0 S 13452742SwollmanRule Mexico 1950 only - Feb 12 0:00 1:00 D 13462742SwollmanRule Mexico 1950 only - Jul 30 0:00 0 S 134775267SwollmanRule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D 134875267SwollmanRule Mexico 1996 2000 - Oct lastSun 2:00 0 S 134975267SwollmanRule Mexico 2001 max - May Sun>=1 2:00 1:00 D 135075267SwollmanRule Mexico 2001 max - Sep lastSun 2:00 0 S 13512742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 135243014Swollman# Quintana Roo 135358787SruZone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 135475267Swollman -6:00 - CST 1981 Dec 23 135543543Swollman -5:00 Mexico E%sT 1998 Aug 2 2:00 135643543Swollman -6:00 Mexico C%sT 135764499Swollman# Campeche, Yucatan 135864499SwollmanZone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 135975267Swollman -6:00 - CST 1981 Dec 23 136064499Swollman -5:00 - EST 1982 Dec 2 136164499Swollman -6:00 Mexico C%sT 136264499Swollman# Coahuila, Durango, Nuevo Leon, Tamaulipas 136375267SwollmanZone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 136464499Swollman -6:00 - CST 1988 136564499Swollman -6:00 US C%sT 1989 136664499Swollman -6:00 Mexico C%sT 136743014Swollman# Central Mexico 13682742SwollmanZone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 13692742Swollman -7:00 - MST 1927 Jun 10 23:00 13702742Swollman -6:00 - CST 1930 Nov 15 13712742Swollman -7:00 - MST 1931 May 1 23:00 13722742Swollman -6:00 - CST 1931 Oct 137375267Swollman -7:00 - MST 1932 Apr 1 13742742Swollman -6:00 Mexico C%sT 137543014Swollman# Chihuahua 137658787SruZone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 137743014Swollman -7:00 - MST 1927 Jun 10 23:00 137843014Swollman -6:00 - CST 1930 Nov 15 137943014Swollman -7:00 - MST 1931 May 1 23:00 138043014Swollman -6:00 - CST 1931 Oct 138175267Swollman -7:00 - MST 1932 Apr 1 138243014Swollman -6:00 - CST 1996 138343014Swollman -6:00 Mexico C%sT 1998 138443014Swollman -6:00 - CST 1998 Apr Sun>=1 3:00 138543014Swollman -7:00 Mexico M%sT 138658787Sru# Sonora 138758787SruZone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 138858787Sru -7:00 - MST 1927 Jun 10 23:00 138958787Sru -6:00 - CST 1930 Nov 15 139058787Sru -7:00 - MST 1931 May 1 23:00 139158787Sru -6:00 - CST 1931 Oct 139275267Swollman -7:00 - MST 1932 Apr 1 139364499Swollman -6:00 - CST 1942 Apr 24 139458787Sru -7:00 - MST 1949 Jan 14 139558787Sru -8:00 - PST 1970 139658787Sru -7:00 Mexico M%sT 1999 139758787Sru -7:00 - MST 139864499Swollman# Baja California Sur, Nayarit, Sinaloa 13992742SwollmanZone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 14002742Swollman -7:00 - MST 1927 Jun 10 23:00 14012742Swollman -6:00 - CST 1930 Nov 15 14022742Swollman -7:00 - MST 1931 May 1 23:00 14032742Swollman -6:00 - CST 1931 Oct 140475267Swollman -7:00 - MST 1932 Apr 1 140564499Swollman -6:00 - CST 1942 Apr 24 14062742Swollman -7:00 - MST 1949 Jan 14 14072742Swollman -8:00 - PST 1970 140814343Swollman -7:00 Mexico M%sT 140958787Sru# Baja California 14102742SwollmanZone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 141175267Swollman -7:00 - MST 1924 14122742Swollman -8:00 - PST 1927 Jun 10 23:00 141375267Swollman -7:00 - MST 1930 Nov 15 141475267Swollman -8:00 - PST 1931 Apr 1 141575267Swollman -8:00 1:00 PDT 1931 Sep 30 141664499Swollman -8:00 - PST 1942 Apr 24 141775267Swollman -8:00 1:00 PWT 1945 Nov 12 141875267Swollman -8:00 - PST 1948 Apr 5 141975267Swollman -8:00 1:00 PDT 1949 Jan 14 142075267Swollman -8:00 - PST 1954 142175267Swollman -8:00 CA P%sT 1961 142275267Swollman -8:00 - PST 1976 142314343Swollman -8:00 US P%sT 1996 142475267Swollman -8:00 Mexico P%sT 2001 142575267Swollman -8:00 US P%sT 142675267Swollman# From Paul Eggert (2001-03-05): 142775267Swollman# Formerly there was an America/Ensenada zone, which differed from 142875267Swollman# America/Tijuana only in that it did not observe DST from 1976 142975267Swollman# through 1995. This was as per Shanks. However, Guy Harris reports 143075267Swollman# that the 1987 OAG says "Only Ensenada, Mexicale, San Felipe and 143175267Swollman# Tijuana observe DST," which contradicts Shanks but does imply that 143275267Swollman# DST-observance was a town-by-town matter back then. This concerns 143375267Swollman# data after 1970 so most likely there should be at least one Zone 143475267Swollman# other than America/Tijuana for Baja, but it's not clear yet what its 143575267Swollman# name or contents should be. 14362742Swollman# 14372742Swollman# Revillagigedo Is 14382742Swollman# no information 14392742Swollman 14402742Swollman############################################################################### 14412742Swollman 14422742Swollman# Anguilla 14432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14442742SwollmanZone America/Anguilla -4:12:16 - LMT 1912 Mar 2 14452742Swollman -4:00 - AST 14462742Swollman 14472742Swollman# Antigua and Barbuda 14482742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14492742SwollmanZone America/Antigua -4:07:12 - LMT 1912 Mar 2 14502742Swollman -5:00 - EST 1951 14512742Swollman -4:00 - AST 14522742Swollman 14532742Swollman# Bahamas 14542742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14552742SwollmanRule Bahamas 1964 max - Oct lastSun 2:00 0 S 14562742SwollmanRule Bahamas 1964 1986 - Apr lastSun 2:00 1:00 D 14572742SwollmanRule Bahamas 1987 max - Apr Sun>=1 2:00 1:00 D 14582742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14592742SwollmanZone America/Nassau -5:09:24 - LMT 1912 Mar 2 14602742Swollman -5:00 Bahamas E%sT 14612742Swollman 14622742Swollman# Barbados 14632742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14642742SwollmanRule Barb 1977 only - Jun 12 2:00 1:00 D 14652742SwollmanRule Barb 1977 1978 - Oct Sun>=1 2:00 0 S 14662742SwollmanRule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D 14672742SwollmanRule Barb 1979 only - Sep 30 2:00 0 S 14682742SwollmanRule Barb 1980 only - Sep 25 2:00 0 S 14692742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14702742SwollmanZone America/Barbados -3:58:28 - LMT 1924 # Bridgetown 147143014Swollman -3:58:28 - BMT 1932 # Bridgetown Mean Time 14722742Swollman -4:00 Barb A%sT 14732742Swollman 14742742Swollman# Belize 14752742Swollman# Whitman entirely disagrees with Shanks; go with Shanks. 14762742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 14772742SwollmanRule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD 14782742SwollmanRule Belize 1919 1943 - Feb Sun>=9 0:00 0 S 14792742SwollmanRule Belize 1973 only - Dec 5 0:00 1:00 D 14802742SwollmanRule Belize 1974 only - Feb 9 0:00 0 S 14812742SwollmanRule Belize 1982 only - Dec 18 0:00 1:00 D 14822742SwollmanRule Belize 1983 only - Feb 12 0:00 0 S 14832742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14842742SwollmanZone America/Belize -5:52:48 - LMT 1912 Apr 14852742Swollman -6:00 Belize C%sT 14862742Swollman 14872742Swollman# Bermuda 14882742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14892742SwollmanZone Atlantic/Bermuda -4:19:04 - LMT 1930 Jan 1 2:00 # Hamilton 14902742Swollman -4:00 - AST 1974 Apr 28 2:00 14912742Swollman -4:00 Bahamas A%sT 14922742Swollman 14932742Swollman# Cayman Is 14942742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 14952742SwollmanZone America/Cayman -5:25:32 - LMT 1890 # Georgetown 149643014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 14972742Swollman -5:00 - EST 14982742Swollman 14992742Swollman# Costa Rica 15002742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15012742SwollmanRule CR 1979 1980 - Feb lastSun 0:00 1:00 D 15022742SwollmanRule CR 1979 1980 - Jun Sun>=1 0:00 0 S 150320094SwollmanRule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D 150420094Swollman# IATA SSIM (1991-09) says the following was at 1:00; go with Shanks. 150520094SwollmanRule CR 1991 only - Jul 1 0:00 0 S 150620094SwollmanRule CR 1992 only - Mar 15 0:00 0 S 15072742Swollman# There are too many San Joses elsewhere, so we'll use `Costa Rica'. 15082742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15092742SwollmanZone America/Costa_Rica -5:36:20 - LMT 1890 # San Jose 151058787Sru -5:36:20 - SJMT 1921 Jan 15 # San Jose Mean Time 15112742Swollman -6:00 CR C%sT 15122742Swollman# Coco 15132742Swollman# no information; probably like America/Costa_Rica 15142742Swollman 15152742Swollman# Cuba 15162742Swollman 151758787Sru# From Arthur David Olson (1999-03-29): 151858787Sru# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between 151958787Sru# the Cuban National Team and the Baltimore Orioles was carried live on 152058787Sru# the Orioles Radio Network, including affiliate WTOP in Washington, DC. 152158787Sru# During the game, play-by-play announcer Jim Hunter noted that 152258787Sru# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving 152358787Sru# Time today." (The "two hour" remark referred to losing one hour of 152458787Sru# sleep on 1999-03-28--when the announcers were in Cuba as it switched 152558787Sru# to DST--and one more hour on 1999-04-04--when the announcers will have 152658787Sru# returned to Baltimore, which switches on that date.) 15272742Swollman 15282742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15292742SwollmanRule Cuba 1928 only - Jun 10 0:00 1:00 D 15302742SwollmanRule Cuba 1928 only - Oct 10 0:00 0 S 15312742SwollmanRule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D 15322742SwollmanRule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S 15332742SwollmanRule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D 15342742SwollmanRule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S 15352742SwollmanRule Cuba 1965 only - Jun 1 0:00 1:00 D 15362742SwollmanRule Cuba 1965 only - Sep 30 0:00 0 S 15372742SwollmanRule Cuba 1966 only - May 29 0:00 1:00 D 15382742SwollmanRule Cuba 1966 only - Oct 2 0:00 0 S 15392742SwollmanRule Cuba 1967 only - Apr 8 0:00 1:00 D 15402742SwollmanRule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S 15412742SwollmanRule Cuba 1968 only - Apr 14 0:00 1:00 D 15422742SwollmanRule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D 15432742SwollmanRule Cuba 1969 1971 - Oct lastSun 0:00 0 S 15442742SwollmanRule Cuba 1972 1974 - Oct 8 0:00 0 S 15452742SwollmanRule Cuba 1975 1977 - Oct lastSun 0:00 0 S 15462742SwollmanRule Cuba 1978 only - May 7 0:00 1:00 D 154730711SwollmanRule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S 15482742SwollmanRule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D 15492742SwollmanRule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D 15502742SwollmanRule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D 155143014SwollmanRule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D 155220094SwollmanRule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S 155343014SwollmanRule Cuba 1996 only - Oct 6 0:00s 0 S 155443014SwollmanRule Cuba 1997 only - Oct 12 0:00s 0 S 155558787SruRule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D 155643014SwollmanRule Cuba 1998 max - Oct lastSun 0:00s 0 S 155758787SruRule Cuba 2000 max - Apr Sun>=1 0:00s 1:00 D 15582742Swollman 15592742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15602742SwollmanZone America/Havana -5:29:28 - LMT 1890 156158787Sru -5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT 15622742Swollman -5:00 Cuba C%sT 15632742Swollman 15642742Swollman# Dominica 15652742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15662742SwollmanZone America/Dominica -4:05:36 - LMT 1911 Jul 1 0:01 # Roseau 15672742Swollman -4:00 - AST 15682742Swollman 15692742Swollman# Dominican Republic 157075267Swollman 157175267Swollman# From Steffen Thorsen (2000-10-30): 157275267Swollman# Enrique Morales reported to me that the Dominican Republic has changed the 157375267Swollman# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... 157475267Swollman# http://www.listin.com.do/antes/261000/republica/princi.html 157575267Swollman 157675267Swollman# From Paul Eggert (2000-12-04): 157775267Swollman# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. 157875267Swollman 157975267Swollman# From Rives McDow (2000-12-01): 158075267Swollman# Dominican Republic changed its mind and presidential decree on Tuesday, 158175267Swollman# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the 158275267Swollman# Dominican Republic will be reverting to 8 hours from the International Date 158375267Swollman# Line, and will not be using DST in the foreseeable future. The reason they 158475267Swollman# decided to use DST was to be in synch with Puerto Rico, who was also going 158575267Swollman# to implement DST. When Puerto Rico didn't implement DST, the president 158675267Swollman# decided to revert. 158775267Swollman 158875267Swollman 15892742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 15902742SwollmanRule DR 1966 only - Oct 30 0:00 1:00 D 15912742SwollmanRule DR 1967 only - Feb 28 0:00 0 S 15922742SwollmanRule DR 1969 1973 - Oct lastSun 0:00 0:30 HD 15932742SwollmanRule DR 1970 only - Feb 21 0:00 0 S 15942742SwollmanRule DR 1971 only - Jan 20 0:00 0 S 15952742SwollmanRule DR 1972 1974 - Jan 21 0:00 0 S 15962742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 15972742SwollmanZone America/Santo_Domingo -4:39:36 - LMT 1890 15982742Swollman -4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT 15992742Swollman -5:00 DR E%sT 1974 Oct 27 160075267Swollman -4:00 - AST 2000 Oct 29 02:00 160175267Swollman -5:00 US E%sT 2000 Dec 3 01:00 16022742Swollman -4:00 - AST 16032742Swollman 16042742Swollman# El Salvador 16052742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16062742SwollmanRule Salv 1987 1988 - May Sun>=1 0:00 1:00 D 16072742SwollmanRule Salv 1987 1988 - Sep lastSun 0:00 0 S 16082742Swollman# There are too many San Salvadors elsewhere, so we'll use `El Salvador'. 16092742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16102742SwollmanZone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador 16112742Swollman -6:00 Salv C%sT 16122742Swollman 16132742Swollman# Grenada 16142742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 161519878SwollmanZone America/Grenada -4:07:00 - LMT 1911 Jul # St George's 16162742Swollman -4:00 - AST 16172742Swollman 16182742Swollman# Guadeloupe 16192742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16202742SwollmanZone America/Guadeloupe -4:06:08 - LMT 1911 Jun 8 # Pointe a Pitre 16212742Swollman -4:00 - AST 16222742Swollman 16232742Swollman# Guatemala 16242742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16252742SwollmanRule Guat 1973 only - Nov 25 0:00 1:00 D 16262742SwollmanRule Guat 1974 only - Feb 24 0:00 0 S 16272742SwollmanRule Guat 1983 only - May 21 0:00 1:00 D 16282742SwollmanRule Guat 1983 only - Sep 22 0:00 0 S 162920094SwollmanRule Guat 1991 only - Mar 23 0:00 1:00 D 163020094SwollmanRule Guat 1991 only - Sep 7 0:00 0 S 16312742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16322742SwollmanZone America/Guatemala -6:02:04 - LMT 1918 Oct 5 16332742Swollman -6:00 Guat C%sT 16342742Swollman 16352742Swollman# Haiti 16362742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16372742SwollmanRule Haiti 1983 only - May 8 0:00 1:00 D 16382742SwollmanRule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D 16392742SwollmanRule Haiti 1983 1987 - Oct lastSun 0:00 0 S 164058787Sru# Shanks says AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. Go with IATA. 164143014SwollmanRule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D 164243014SwollmanRule Haiti 1988 1997 - Oct lastSun 1:00s 0 S 16432742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16442742SwollmanZone America/Port-au-Prince -4:49:20 - LMT 1890 16452742Swollman -4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT 16462742Swollman -5:00 Haiti E%sT 16472742Swollman 16482742Swollman# Honduras 16492742Swollman# Shanks says 1921 Jan 1; go with Whitman's more precise Apr 1. 16502742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16512742SwollmanZone America/Tegucigalpa -5:48:52 - LMT 1921 Apr 16522742Swollman -6:00 Salv C%sT 165343543Swollman# 165443543Swollman# Great Swan I ceded by US to Honduras in 1972 16552742Swollman 16562742Swollman# Jamaica 16572742Swollman 165819878Swollman# From Bob Devine (1988-01-28): 16592742Swollman# Follows US rules. 16602742Swollman 166119878Swollman# From U. S. Naval Observatory (1989-01-19): 16622742Swollman# JAMAICA 5 H BEHIND UTC 16632742Swollman 166458787Sru# From Shanks: 16652742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16662742SwollmanZone America/Jamaica -5:07:12 - LMT 1890 # Kingston 166743014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 166858787Sru -5:00 - EST 1974 Apr 28 2:00 166920094Swollman -5:00 US E%sT 1984 167020094Swollman -5:00 - EST 16712742Swollman 16722742Swollman# Martinique 16732742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 16742742SwollmanZone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France 16752742Swollman -4:04 - FFMT 1911 May # Fort-de-France MT 16762742Swollman -4:00 - AST 1980 Apr 6 16772742Swollman -4:00 1:00 ADT 1980 Sep 28 16782742Swollman -4:00 - AST 16792742Swollman 16802742Swollman# Montserrat 168130711Swollman# From Paul Eggert (1997-08-31): 168230711Swollman# Recent volcanic eruptions have forced evacuation of Plymouth, the capital. 168330711Swollman# Luckily, Olveston, the current de facto capital, has the same longitude. 16842742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 168530711SwollmanZone America/Montserrat -4:08:52 - LMT 1911 Jul 1 0:01 # Olveston 16862742Swollman -4:00 - AST 16872742Swollman 16882742Swollman# Nicaragua 168943543Swollman# 169043543Swollman# From Steffen Thorsen (1998-12-29): 169143543Swollman# Nicaragua seems to be back at -6:00 but I have not been able to find when 169243543Swollman# they changed from -5:00. 169343543Swollman# 16942742Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 16952742SwollmanRule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D 16962742SwollmanRule Nic 1979 1980 - Jun Mon>=23 0:00 0 S 169720094SwollmanRule Nic 1992 only - Jan 1 4:00 1:00 D 169820094SwollmanRule Nic 1992 only - Sep 24 0:00 0 S 16992742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17002742SwollmanZone America/Managua -5:45:08 - LMT 1890 17012742Swollman -5:45 - MMT 1934 Jun 23 # Managua Mean Time 17022742Swollman -6:00 - CST 1973 May 17032742Swollman -5:00 - EST 1975 Feb 16 170420094Swollman -6:00 Nic C%sT 1993 Jan 1 4:00 170543543Swollman -5:00 - EST 1998 Dec 170643543Swollman -6:00 - CST 17072742Swollman 17082742Swollman# Panama 17092742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17102742SwollmanZone America/Panama -5:18:08 - LMT 1890 17112742Swollman -5:20 - PMT 1908 Apr 22 # Panama Mean Time 17122742Swollman -5:00 - EST 17132742Swollman 17142742Swollman# Puerto Rico 17152742Swollman# There are too many San Juans elsewhere, so we'll use `Puerto_Rico'. 17162742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 171714343SwollmanZone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan 17182742Swollman -4:00 - AST 1942 May 3 171914343Swollman -4:00 1:00 AWT 1945 Sep 30 2:00 17202742Swollman -4:00 - AST 17212742Swollman 17222742Swollman# St Kitts-Nevis 17232742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17242742SwollmanZone America/St_Kitts -4:10:52 - LMT 1912 Mar 2 # Basseterre 17252742Swollman -4:00 - AST 17262742Swollman 17272742Swollman# St Lucia 17282742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17292742SwollmanZone America/St_Lucia -4:04:00 - LMT 1890 # Castries 17302742Swollman -4:04 - CMT 1912 # Castries Mean Time 17312742Swollman -4:00 - AST 17322742Swollman 17332742Swollman# St Pierre and Miquelon 17342742Swollman# There are too many St Pierres elsewhere, so we'll use `Miquelon'. 17352742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17362742SwollmanZone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre 17372742Swollman -4:00 - AST 1980 May 173819878Swollman -3:00 Mont PM%sT # Pierre & Miquelon Time 17392742Swollman 17402742Swollman# St Vincent and the Grenadines 17412742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17422742SwollmanZone America/St_Vincent -4:04:56 - LMT 1890 # Kingstown 174343014Swollman -4:04:56 - KMT 1912 # Kingstown Mean Time 17442742Swollman -4:00 - AST 17452742Swollman 17462742Swollman# Turks and Caicos 174743014Swollman# From Paul Eggert (1998-08-06): 174843014Swollman# Shanks says they use US DST rules, but IATA SSIM (1991/1998) 174920094Swollman# says they switch at midnight. Go with IATA SSIM. 175020094Swollman# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S 175120094SwollmanRule TC 1979 1986 - Apr lastSun 0:00 1:00 D 175220094SwollmanRule TC 1979 max - Oct lastSun 0:00 0 S 175320094SwollmanRule TC 1987 max - Apr Sun>=1 0:00 1:00 D 17542742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 17552742SwollmanZone America/Grand_Turk -4:44:32 - LMT 1890 175643014Swollman -5:07:12 - KMT 1912 Feb # Kingston Mean Time 175720094Swollman -5:00 TC E%sT 17588029Swollman 175914343Swollman# British Virgin Is 17602742Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 176114343SwollmanZone America/Tortola -4:18:28 - LMT 1911 Jul # Road Town 17622742Swollman -4:00 - AST 17638029Swollman 176414343Swollman# Virgin Is 176514343Swollman# Zone NAME GMTOFF RULES FORMAT [UNTIL] 176614343SwollmanZone America/St_Thomas -4:19:44 - LMT 1911 Jul # Charlotte Amalie 176714343Swollman -4:00 - AST 1768