# This file is in the public domain, so clarified as of |
# 2009-05-17 by Arthur David Olson. |
|
# also includes Central America and the Caribbean |
|
# This file is by no means authoritative; if you think you know better, |
# go ahead and edit the file (and please send any changes to |
# tz@iana.org for general use in the future). For more, please see |
# the file CONTRIBUTING in the tz distribution. |
|
# From Paul Eggert (1999-03-22): |
# A reliable and entertaining source about time zones is |
# Derek Howse, Greenwich time and longitude, Philip Wilson Publishers (1997). |
|
############################################################################### |
|
# United States |
|
# From Paul Eggert (1999-03-31): |
# Howse writes (pp 121-125) that time zones were invented by |
# Professor Charles Ferdinand Dowd (1825-1904), |
# Principal of Temple Grove Ladies' Seminary (Saratoga Springs, NY). |
# His pamphlet "A System of National Time for Railroads" (1870) |
# was the result of his proposals at the Convention of Railroad Trunk Lines |
# in New York City (1869-10). His 1870 proposal was based on Washington, DC, |
# but in 1872-05 he moved the proposed origin to Greenwich. |
# His proposal was adopted by the railroads on 1883-11-18 at 12:00, |
# and the most of the country soon followed suit. |
|
# From Paul Eggert (2005-04-16): |
# That 1883 transition occurred at 12:00 new time, not at 12:00 old time. |
# See p 46 of David Prerau, Seize the daylight, Thunder's Mouth Press (2005). |
|
# From Paul Eggert (2006-03-22): |
# A good source for time zone historical data in the US is |
# Thomas G. Shanks, The American Atlas (5th edition), |
# San Diego: ACS Publications, Inc. (1991). |
# Make sure you have the errata sheet; the book is somewhat useless without it. |
# It is the source for most of the pre-1991 US entries below. |
|
# From Paul Eggert (2001-03-06): |
# Daylight Saving Time was first suggested as a joke by Benjamin Franklin |
# in his whimsical essay "An Economical Project for Diminishing the Cost |
# of Light" published in the Journal de Paris (1784-04-26). |
# Not everyone is happy with the results: |
# |
# I don't really care how time is reckoned so long as there is some |
# agreement about it, but I object to being told that I am saving |
# daylight when my reason tells me that I am doing nothing of the kind. |
# I even object to the implication that I am wasting something |
# valuable if I stay in bed after the sun has risen. As an admirer |
# of moonlight I resent the bossy insistence of those who want to |
# reduce my time for enjoying it. At the back of the Daylight Saving |
# scheme I detect the bony, blue-fingered hand of Puritanism, eager |
# to push people into bed earlier, and get them up earlier, to make |
# them healthy, wealthy and wise in spite of themselves. |
# |
# -- Robertson Davies, The diary of Samuel Marchbanks, |
# Clarke, Irwin (1947), XIX, Sunday |
# |
# For more about the first ten years of DST in the United States, see |
# Robert Garland, Ten years of daylight saving from the Pittsburgh standpoint |
# (Carnegie Library of Pittsburgh, 1927). |
# http://www.clpgh.org/exhibit/dst.html |
# |
# Shanks says that DST was called "War Time" in the US in 1918 and 1919. |
# However, DST was imposed by the Standard Time Act of 1918, which |
# was the first nationwide legal time standard, and apparently |
# time was just called "Standard Time" or "Daylight Saving Time". |
|
# From Arthur David Olson: |
# US Daylight Saving Time ended on the last Sunday of *October* in 1974. |
# See, for example, the front page of the Saturday, 1974-10-26 |
# and Sunday, 1974-10-27 editions of the Washington Post. |
|
# From Arthur David Olson: |
# Before the Uniform Time Act of 1966 took effect in 1967, observance of |
# Daylight Saving Time in the US was by local option, except during wartime. |
|
# From Arthur David Olson (2000-09-25): |
# Last night I heard part of a rebroadcast of a 1945 Arch Oboler radio drama. |
# In the introduction, Oboler spoke of "Eastern Peace Time." |
# An AltaVista search turned up: |
# http://rowayton.org/rhs/hstaug45.html |
# "When the time is announced over the radio now, it is 'Eastern Peace |
# Time' instead of the old familiar 'Eastern War Time.' Peace is wonderful." |
# (August 1945) by way of confirmation. |
|
# From Joseph Gallant citing |
# George H. Douglas, _The Early Days of Radio Broadcasting_ (1987): |
# At 7 P.M. (Eastern War Time) [on 1945-08-14], the networks were set |
# to switch to London for Attlee's address, but the American people |
# never got to hear his speech live. According to one press account, |
# CBS' Bob Trout was first to announce the word of Japan's surrender, |
# but a few seconds later, NBC, ABC and Mutual also flashed the word |
# of surrender, all of whom interrupting the bells of Big Ben in |
# London which were to precede Mr. Attlee's speech. |
|
# From Paul Eggert (2003-02-09): It was Robert St John, not Bob Trout. From |
# Myrna Oliver's obituary of St John on page B16 of today's Los Angeles Times: |
# |
# ... a war-weary U.S. clung to radios, awaiting word of Japan's surrender. |
# Any announcement from Asia would reach St. John's New York newsroom on a |
# wire service teletype machine, which had prescribed signals for major news. |
# Associated Press, for example, would ring five bells before spewing out |
# typed copy of an important story, and 10 bells for news "of transcendental |
# importance." |
# |
# On Aug. 14, stalling while talking steadily into the NBC networks' open |
# microphone, St. John heard five bells and waited only to hear a sixth bell, |
# before announcing confidently: "Ladies and gentlemen, World War II is over. |
# The Japanese have agreed to our surrender terms." |
# |
# He had scored a 20-second scoop on other broadcasters. |
|
# From Arthur David Olson (2005-08-22): |
# Paul has been careful to use the "US" rules only in those locations |
# that are part of the United States; this reflects the real scope of |
# U.S. government action. So even though the "US" rules have changed |
# in the latest release, other countries won't be affected. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule US 1918 1919 - Mar lastSun 2:00 1:00 D |
Rule US 1918 1919 - Oct lastSun 2:00 0 S |
Rule US 1942 only - Feb 9 2:00 1:00 W # War |
Rule US 1945 only - Aug 14 23:00u 1:00 P # Peace |
Rule US 1945 only - Sep lastSun 2:00 0 S |
Rule US 1967 2006 - Oct lastSun 2:00 0 S |
Rule US 1967 1973 - Apr lastSun 2:00 1:00 D |
Rule US 1974 only - Jan 6 2:00 1:00 D |
Rule US 1975 only - Feb 23 2:00 1:00 D |
Rule US 1976 1986 - Apr lastSun 2:00 1:00 D |
Rule US 1987 2006 - Apr Sun>=1 2:00 1:00 D |
Rule US 2007 max - Mar Sun>=8 2:00 1:00 D |
Rule US 2007 max - Nov Sun>=1 2:00 0 S |
|
# From Arthur David Olson, 2005-12-19 |
# We generate the files specified below to guard against old files with |
# obsolete information being left in the time zone binary directory. |
# We limit the list to names that have appeared in previous versions of |
# this time zone package. |
# We do these as separate Zones rather than as Links to avoid problems if |
# a particular place changes whether it observes DST. |
# We put these specifications here in the northamerica file both to |
# increase the chances that they'll actually get compiled and to |
# avoid the need to duplicate the US rules in another file. |
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone EST -5:00 - EST |
Zone MST -7:00 - MST |
Zone HST -10:00 - HST |
Zone EST5EDT -5:00 US E%sT |
Zone CST6CDT -6:00 US C%sT |
Zone MST7MDT -7:00 US M%sT |
Zone PST8PDT -8:00 US P%sT |
|
# From Bob Devine (1988-01-28): |
# ...Alaska (and Hawaii) had the timezone names changed in 1967. |
# old new |
# Pacific Standard Time(PST) -same- |
# Yukon Standard Time(YST) -same- |
# Central Alaska S.T. (CAT) Alaska-Hawaii St[an]dard Time (AHST) |
# Nome Standard Time (NT) Bering Standard Time (BST) |
# |
# ...Alaska's timezone lines were redrawn in 1983 to give only 2 tz. |
# The YST zone now covers nearly all of the state, AHST just part |
# of the Aleutian islands. No DST. |
|
# From Paul Eggert (1995-12-19): |
# The tables below use 'NST', not 'NT', for Nome Standard Time. |
# I invented 'CAWT' for Central Alaska War Time. |
|
# From U. S. Naval Observatory (1989-01-19): |
# USA EASTERN 5 H BEHIND UTC NEW YORK, WASHINGTON |
# USA EASTERN 4 H BEHIND UTC APR 3 - OCT 30 |
# USA CENTRAL 6 H BEHIND UTC CHICAGO, HOUSTON |
# USA CENTRAL 5 H BEHIND UTC APR 3 - OCT 30 |
# USA MOUNTAIN 7 H BEHIND UTC DENVER |
# USA MOUNTAIN 6 H BEHIND UTC APR 3 - OCT 30 |
# USA PACIFIC 8 H BEHIND UTC L.A., SAN FRANCISCO |
# USA PACIFIC 7 H BEHIND UTC APR 3 - OCT 30 |
# USA ALASKA STD 9 H BEHIND UTC MOST OF ALASKA (AKST) |
# USA ALASKA STD 8 H BEHIND UTC APR 3 - OCT 30 (AKDT) |
# USA ALEUTIAN 10 H BEHIND UTC ISLANDS WEST OF 170W |
# USA " 9 H BEHIND UTC APR 3 - OCT 30 |
# USA HAWAII 10 H BEHIND UTC |
# USA BERING 11 H BEHIND UTC SAMOA, MIDWAY |
|
# From Arthur David Olson (1989-01-21): |
# The above dates are for 1988. |
# Note the "AKST" and "AKDT" abbreviations, the claim that there's |
# no DST in Samoa, and the claim that there is DST in Alaska and the |
# Aleutians. |
|
# From Arthur David Olson (1988-02-13): |
# Legal standard time zone names, from United States Code (1982 Edition and |
# Supplement III), Title 15, Chapter 6, Section 260 and forward. First, names |
# up to 1967-04-01 (when most provisions of the Uniform Time Act of 1966 |
# took effect), as explained in sections 263 and 261: |
# (none) |
# United States standard eastern time |
# United States standard mountain time |
# United States standard central time |
# United States standard Pacific time |
# (none) |
# United States standard Alaska time |
# (none) |
# Next, names from 1967-04-01 until 1983-11-30 (the date for |
# public law 98-181): |
# Atlantic standard time |
# eastern standard time |
# central standard time |
# mountain standard time |
# Pacific standard time |
# Yukon standard time |
# Alaska-Hawaii standard time |
# Bering standard time |
# And after 1983-11-30: |
# Atlantic standard time |
# eastern standard time |
# central standard time |
# mountain standard time |
# Pacific standard time |
# Alaska standard time |
# Hawaii-Aleutian standard time |
# Samoa standard time |
# The law doesn't give abbreviations. |
# |
# From Paul Eggert (2000-01-08), following a heads-up from Rives McDow: |
# Public law 106-564 (2000-12-23) introduced ... "Chamorro Standard Time" |
# for time in Guam and the Northern Marianas. See the file "australasia". |
# |
# From Paul Eggert (2015-04-17): |
# HST and HDT are standardized abbreviations for Hawaii-Aleutian |
# standard and daylight times. See section 9.47 (p 234) of the |
# U.S. Government Printing Office Style Manual (2008) |
# http://www.gpo.gov/fdsys/pkg/GPO-STYLEMANUAL-2008/pdf/GPO-STYLEMANUAL-2008.pdf |
|
# From Arthur David Olson, 2005-08-09 |
# The following was signed into law on 2005-08-08. |
# |
# H.R. 6, Energy Policy Act of 2005, SEC. 110. DAYLIGHT SAVINGS. |
# (a) Amendment.--Section 3(a) of the Uniform Time Act of 1966 (15 |
# U.S.C. 260a(a)) is amended-- |
# (1) by striking "first Sunday of April" and inserting "second |
# Sunday of March"; and |
# (2) by striking "last Sunday of October" and inserting "first |
# Sunday of November'. |
# (b) Effective Date.--Subsection (a) shall take effect 1 year after the |
# date of enactment of this Act or March 1, 2007, whichever is later. |
# (c) Report to Congress.--Not later than 9 months after the effective |
# date stated in subsection (b), the Secretary shall report to Congress |
# on the impact of this section on energy consumption in the United |
# States. |
# (d) Right to Revert.--Congress retains the right to revert the |
# Daylight Saving Time back to the 2005 time schedules once the |
# Department study is complete. |
|
# US eastern time, represented by New York |
|
# Connecticut, Delaware, District of Columbia, most of Florida, |
# Georgia, southeast Indiana (Dearborn and Ohio counties), eastern Kentucky |
# (except America/Kentucky/Louisville below), Maine, Maryland, Massachusetts, |
# New Hampshire, New Jersey, New York, North Carolina, Ohio, |
# Pennsylvania, Rhode Island, South Carolina, eastern Tennessee, |
# Vermont, Virginia, West Virginia |
|
# From Dave Cantor (2004-11-02): |
# Early this summer I had the occasion to visit the Mount Washington |
# Observatory weather station atop (of course!) Mount Washington [, NH].... |
# One of the staff members said that the station was on Eastern Standard Time |
# and didn't change their clocks for Daylight Saving ... so that their |
# reports will always have times which are 5 hours behind UTC. |
|
# From Paul Eggert (2005-08-26): |
# According to today's Huntsville Times |
# http://www.al.com/news/huntsvilletimes/index.ssf?/base/news/1125047783228320.xml&coll=1 |
# a few towns on Alabama's "eastern border with Georgia, such as Phenix City |
# in Russell County, Lanett in Chambers County and some towns in Lee County, |
# set their watches and clocks on Eastern time." It quotes H.H. "Bubba" |
# Roberts, city administrator in Phenix City. as saying "We are in the Central |
# time zone, but we do go by the Eastern time zone because so many people work |
# in Columbus." |
|
# From Paul Eggert (2014-09-06): |
# Monthly Notices of the Royal Astronomical Society 44, 4 (1884-02-08), 208 |
# says that New York City Hall time was 3 minutes 58.4 seconds fast of |
# Eastern time (i.e., -4:56:01.6) just before the 1883 switch. Round to the |
# nearest second. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule NYC 1920 only - Mar lastSun 2:00 1:00 D |
Rule NYC 1920 only - Oct lastSun 2:00 0 S |
Rule NYC 1921 1966 - Apr lastSun 2:00 1:00 D |
Rule NYC 1921 1954 - Sep lastSun 2:00 0 S |
Rule NYC 1955 1966 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/New_York -4:56:02 - LMT 1883 Nov 18 12:03:58 |
-5:00 US E%sT 1920 |
-5:00 NYC E%sT 1942 |
-5:00 US E%sT 1946 |
-5:00 NYC E%sT 1967 |
-5:00 US E%sT |
|
# US central time, represented by Chicago |
|
# Alabama, Arkansas, Florida panhandle (Bay, Calhoun, Escambia, |
# Gulf, Holmes, Jackson, Okaloosa, Santa Rosa, Walton, and |
# Washington counties), Illinois, western Indiana |
# (Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, |
# Vanderburgh, and Warrick counties), Iowa, most of Kansas, western |
# Kentucky, Louisiana, Minnesota, Mississippi, Missouri, eastern |
# Nebraska, eastern North Dakota, Oklahoma, eastern South Dakota, |
# western Tennessee, most of Texas, Wisconsin |
|
# From Larry M. Smith (2006-04-26) re Wisconsin: |
# http://www.legis.state.wi.us/statutes/Stat0175.pdf ... |
# is currently enforced at the 01:00 time of change. Because the local |
# "bar time" in the state corresponds to 02:00, a number of citations |
# are issued for the "sale of class 'B' alcohol after prohibited |
# hours" within the deviated hour of this change every year.... |
# |
# From Douglas R. Bomberg (2007-03-12): |
# Wisconsin has enacted (nearly eleventh-hour) legislation to get WI |
# Statue 175 closer in synch with the US Congress' intent.... |
# http://www.legis.state.wi.us/2007/data/acts/07Act3.pdf |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Chicago 1920 only - Jun 13 2:00 1:00 D |
Rule Chicago 1920 1921 - Oct lastSun 2:00 0 S |
Rule Chicago 1921 only - Mar lastSun 2:00 1:00 D |
Rule Chicago 1922 1966 - Apr lastSun 2:00 1:00 D |
Rule Chicago 1922 1954 - Sep lastSun 2:00 0 S |
Rule Chicago 1955 1966 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Chicago -5:50:36 - LMT 1883 Nov 18 12:09:24 |
-6:00 US C%sT 1920 |
-6:00 Chicago C%sT 1936 Mar 1 2:00 |
-5:00 - EST 1936 Nov 15 2:00 |
-6:00 Chicago C%sT 1942 |
-6:00 US C%sT 1946 |
-6:00 Chicago C%sT 1967 |
-6:00 US C%sT |
# Oliver County, ND switched from mountain to central time on 1992-10-25. |
Zone America/North_Dakota/Center -6:45:12 - LMT 1883 Nov 18 12:14:48 |
-7:00 US M%sT 1992 Oct 25 2:00 |
-6:00 US C%sT |
# Morton County, ND, switched from mountain to central time on |
# 2003-10-26, except for the area around Mandan which was already central time. |
# See <http://dmses.dot.gov/docimages/p63/135818.pdf>. |
# Officially this switch also included part of Sioux County, and |
# Jones, Mellette, and Todd Counties in South Dakota; |
# but in practice these other counties were already observing central time. |
# See <http://www.epa.gov/fedrgstr/EPA-IMPACT/2003/October/Day-28/i27056.htm>. |
Zone America/North_Dakota/New_Salem -6:45:39 - LMT 1883 Nov 18 12:14:21 |
-7:00 US M%sT 2003 Oct 26 2:00 |
-6:00 US C%sT |
|
# From Josh Findley (2011-01-21): |
# ...it appears that Mercer County, North Dakota, changed from the |
# mountain time zone to the central time zone at the last transition from |
# daylight-saving to standard time (on Nov. 7, 2010): |
# http://www.gpo.gov/fdsys/pkg/FR-2010-09-29/html/2010-24376.htm |
# http://www.bismarcktribune.com/news/local/article_1eb1b588-c758-11df-b472-001cc4c03286.html |
|
# From Andy Lipscomb (2011-01-24): |
# ...according to the Census Bureau, the largest city is Beulah (although |
# it's commonly referred to as Beulah-Hazen, with Hazen being the next |
# largest city in Mercer County). Google Maps places Beulah's city hall |
# at 47 degrees 15' 51" N, 101 degrees 46' 40" W, which yields an offset |
# of 6h47'07". |
|
Zone America/North_Dakota/Beulah -6:47:07 - LMT 1883 Nov 18 12:12:53 |
-7:00 US M%sT 2010 Nov 7 2:00 |
-6:00 US C%sT |
|
# US mountain time, represented by Denver |
# |
# Colorado, far western Kansas, Montana, western |
# Nebraska, Nevada border (Jackpot, Owyhee, and Mountain City), |
# New Mexico, southwestern North Dakota, |
# western South Dakota, far western Texas (El Paso County, Hudspeth County, |
# and Pine Springs and Nickel Creek in Culberson County), Utah, Wyoming |
# |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Denver 1920 1921 - Mar lastSun 2:00 1:00 D |
Rule Denver 1920 only - Oct lastSun 2:00 0 S |
Rule Denver 1921 only - May 22 2:00 0 S |
Rule Denver 1965 1966 - Apr lastSun 2:00 1:00 D |
Rule Denver 1965 1966 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Denver -6:59:56 - LMT 1883 Nov 18 12:00:04 |
-7:00 US M%sT 1920 |
-7:00 Denver M%sT 1942 |
-7:00 US M%sT 1946 |
-7:00 Denver M%sT 1967 |
-7:00 US M%sT |
|
# US Pacific time, represented by Los Angeles |
# |
# California, northern Idaho (Benewah, Bonner, Boundary, Clearwater, |
# Kootenai, Latah, Lewis, Nez Perce, and Shoshone counties, Idaho county |
# north of the Salmon River, and the towns of Burgdorf and Warren), |
# Nevada (except West Wendover), Oregon (except the northern 3/4 of |
# Malheur county), and Washington |
# |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule CA 1948 only - Mar 14 2:00 1:00 D |
Rule CA 1949 only - Jan 1 2:00 0 S |
Rule CA 1950 1966 - Apr lastSun 2:00 1:00 D |
Rule CA 1950 1961 - Sep lastSun 2:00 0 S |
Rule CA 1962 1966 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Los_Angeles -7:52:58 - LMT 1883 Nov 18 12:07:02 |
-8:00 US P%sT 1946 |
-8:00 CA P%sT 1967 |
-8:00 US P%sT |
|
# Alaska |
# AK%sT is the modern abbreviation for -9:00 per USNO. |
# |
# From Paul Eggert (2001-05-30): |
# Howse writes that Alaska switched from the Julian to the Gregorian calendar, |
# and from east-of-GMT to west-of-GMT days, when the US bought it from Russia. |
# This was on 1867-10-18, a Friday; the previous day was 1867-10-06 Julian, |
# also a Friday. Include only the time zone part of this transition, |
# ignoring the switch from Julian to Gregorian, since we can't represent |
# the Julian calendar. |
# |
# As far as we know, none of the exact locations mentioned below were |
# permanently inhabited in 1867 by anyone using either calendar. |
# (Yakutat was colonized by the Russians in 1799, but the settlement |
# was destroyed in 1805 by a Yakutat-kon war party.) However, there |
# were nearby inhabitants in some cases and for our purposes perhaps |
# it's best to simply use the official transition. |
|
# From Paul Eggert (2014-07-18): |
# One opinion of the early-1980s turmoil in Alaska over time zones and |
# daylight saving time appeared as graffiti on a Juneau airport wall: |
# "Welcome to Juneau. Please turn your watch back to the 19th century." |
# See: Turner W. Alaska's four time zones now two. NY Times 1983-11-01. |
# http://www.nytimes.com/1983/11/01/us/alaska-s-four-time-zones-now-two.html |
# |
# Steve Ferguson (2011-01-31) referred to the following source: |
# Norris F. Keeping time in Alaska: national directives, local response. |
# Alaska History 2001;16(1-2). |
# http://alaskahistoricalsociety.org/discover-alaska/glimpses-of-the-past/keeping-time-in-alaska/ |
|
# From Arthur David Olson (2011-02-01): |
# Here's database-relevant material from the 2001 "Alaska History" article: |
# |
# On September 20 [1979]...DOT...officials decreed that on April 27, |
# 1980, Juneau and other nearby communities would move to Yukon Time. |
# Sitka, Petersburg, Wrangell, and Ketchikan, however, would remain on |
# Pacific Time. |
# |
# ...on September 22, 1980, DOT Secretary Neil E. Goldschmidt rescinded the |
# Department's September 1979 decision. Juneau and other communities in |
# northern Southeast reverted to Pacific Time on October 26. |
# |
# On October 28 [1983]...the Metlakatla Indian Community Council voted |
# unanimously to keep the reservation on Pacific Time. |
# |
# According to DOT official Joanne Petrie, Indian reservations are not |
# bound to follow time zones imposed by neighboring jurisdictions. |
# |
# (The last is consistent with how the database now handles the Navajo |
# Nation.) |
|
# From Arthur David Olson (2011-02-09): |
# I just spoke by phone with a staff member at the Metlakatla Indian |
# Community office (using contact information available at |
# http://www.commerce.state.ak.us/dca/commdb/CIS.cfm?Comm_Boro_name=Metlakatla |
# It's shortly after 1:00 here on the east coast of the United States; |
# the staffer said it was shortly after 10:00 there. When I asked whether |
# that meant they were on Pacific time, they said no - they were on their |
# own time. I asked about daylight saving; they said it wasn't used. I |
# did not inquire about practices in the past. |
|
# From Arthur David Olson (2011-08-17): |
# For lack of better information, assume that Metlakatla's |
# abandonment of use of daylight saving resulted from the 1983 vote. |
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Juneau 15:02:19 - LMT 1867 Oct 18 |
-8:57:41 - LMT 1900 Aug 20 12:00 |
-8:00 - PST 1942 |
-8:00 US P%sT 1946 |
-8:00 - PST 1969 |
-8:00 US P%sT 1980 Apr 27 2:00 |
-9:00 US Y%sT 1980 Oct 26 2:00 |
-8:00 US P%sT 1983 Oct 30 2:00 |
-9:00 US Y%sT 1983 Nov 30 |
-9:00 US AK%sT |
Zone America/Sitka 14:58:47 - LMT 1867 Oct 18 |
-9:01:13 - LMT 1900 Aug 20 12:00 |
-8:00 - PST 1942 |
-8:00 US P%sT 1946 |
-8:00 - PST 1969 |
-8:00 US P%sT 1983 Oct 30 2:00 |
-9:00 US Y%sT 1983 Nov 30 |
-9:00 US AK%sT |
Zone America/Metlakatla 15:13:42 - LMT 1867 Oct 18 |
-8:46:18 - LMT 1900 Aug 20 12:00 |
-8:00 - PST 1942 |
-8:00 US P%sT 1946 |
-8:00 - PST 1969 |
-8:00 US P%sT 1983 Oct 30 2:00 |
-8:00 - PST |
Zone America/Yakutat 14:41:05 - LMT 1867 Oct 18 |
-9:18:55 - LMT 1900 Aug 20 12:00 |
-9:00 - YST 1942 |
-9:00 US Y%sT 1946 |
-9:00 - YST 1969 |
-9:00 US Y%sT 1983 Nov 30 |
-9:00 US AK%sT |
Zone America/Anchorage 14:00:24 - LMT 1867 Oct 18 |
-9:59:36 - LMT 1900 Aug 20 12:00 |
-10:00 - CAT 1942 |
-10:00 US CAT/CAWT 1945 Aug 14 23:00u |
-10:00 US CAT/CAPT 1946 # Peace |
-10:00 - CAT 1967 Apr |
-10:00 - AHST 1969 |
-10:00 US AH%sT 1983 Oct 30 2:00 |
-9:00 US Y%sT 1983 Nov 30 |
-9:00 US AK%sT |
Zone America/Nome 12:58:21 - LMT 1867 Oct 18 |
-11:01:38 - LMT 1900 Aug 20 12:00 |
-11:00 - NST 1942 |
-11:00 US N%sT 1946 |
-11:00 - NST 1967 Apr |
-11:00 - BST 1969 |
-11:00 US B%sT 1983 Oct 30 2:00 |
-9:00 US Y%sT 1983 Nov 30 |
-9:00 US AK%sT |
Zone America/Adak 12:13:21 - LMT 1867 Oct 18 |
-11:46:38 - LMT 1900 Aug 20 12:00 |
-11:00 - NST 1942 |
-11:00 US N%sT 1946 |
-11:00 - NST 1967 Apr |
-11:00 - BST 1969 |
-11:00 US B%sT 1983 Oct 30 2:00 |
-10:00 US AH%sT 1983 Nov 30 |
-10:00 US H%sT |
# The following switches don't quite make our 1970 cutoff. |
# |
# Shanks writes that part of southwest Alaska (e.g. Aniak) |
# switched from -11:00 to -10:00 on 1968-09-22 at 02:00, |
# and another part (e.g. Akiak) made the same switch five weeks later. |
# |
# From David Flater (2004-11-09): |
# In e-mail, 2004-11-02, Ray Hudson, historian/liaison to the Unalaska |
# Historic Preservation Commission, provided this information, which |
# suggests that Unalaska deviated from statutory time from early 1967 |
# possibly until 1983: |
# |
# Minutes of the Unalaska City Council Meeting, January 10, 1967: |
# "Except for St. Paul and Akutan, Unalaska is the only important |
# location not on Alaska Standard Time. The following resolution was |
# made by William Robinson and seconded by Henry Swanson: Be it |
# resolved that the City of Unalaska hereby goes to Alaska Standard |
# Time as of midnight Friday, January 13, 1967 (1 A.M. Saturday, |
# January 14, Alaska Standard Time.) This resolution was passed with |
# three votes for and one against." |
|
# Hawaii |
|
# From Arthur David Olson (2010-12-09): |
# "Hawaiian Time" by Robert C. Schmitt and Doak C. Cox appears on pages 207-225 |
# of volume 26 of The Hawaiian Journal of History (1992). As of 2010-12-09, |
# the article is available at |
# http://evols.library.manoa.hawaii.edu/bitstream/10524/239/2/JL26215.pdf |
# and indicates that standard time was adopted effective noon, January |
# 13, 1896 (page 218), that in "1933, the Legislature decreed daylight |
# saving for the period between the last Sunday of each April and the |
# last Sunday of each September, but less than a month later repealed the |
# act," (page 220), that year-round daylight saving time was in effect |
# from 1942-02-09 to 1945-09-30 (page 221, with no time of day given for |
# when clocks changed) and that clocks were changed by 30 minutes |
# effective the second Sunday of June, 1947 (page 219, with no time of |
# day given for when clocks changed). A footnote for the 1933 changes |
# cites Session Laws of Hawaii 1933, "Act. 90 (approved 26 Apr. 1933) |
# and Act 163 (approved 21 May 1933)." |
|
# From Arthur David Olson (2011-01-19): |
# The following is from "Laws of the Territory of Hawaii Passed by the |
# Seventeenth Legislature: Regular Session 1933," available (as of |
# 2011-01-19) at American University's Pence Law Library. Page 85: "Act |
# 90...At 2 o'clock ante meridian of the last Sunday in April of each |
# year, the standard time of this Territory shall be advanced one |
# hour...This Act shall take effect upon its approval. Approved this 26th |
# day of April, A. D. 1933. LAWRENCE M JUDD, Governor of the Territory of |
# Hawaii." Page 172: "Act 163...Act 90 of the Session Laws of 1933 is |
# hereby repealed...This Act shall take effect upon its approval, upon |
# which date the standard time of this Territory shall be restored to |
# that existing immediately prior to the taking effect of said Act 90. |
# Approved this 21st day of May, A. D. 1933. LAWRENCE M. JUDD, Governor |
# of the Territory of Hawaii." |
# |
# Note that 1933-05-21 was a Sunday. |
# We're left to guess the time of day when Act 163 was approved; guess noon. |
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone Pacific/Honolulu -10:31:26 - LMT 1896 Jan 13 12:00 |
-10:30 - HST 1933 Apr 30 2:00 |
-10:30 1:00 HDT 1933 May 21 12:00 |
-10:30 - HST 1942 Feb 9 2:00 |
-10:30 1:00 HDT 1945 Sep 30 2:00 |
-10:30 - HST 1947 Jun 8 2:00 |
-10:00 - HST |
Link Pacific/Honolulu Pacific/Johnston |
|
# Now we turn to US areas that have diverged from the consensus since 1970. |
|
# Arizona mostly uses MST. |
|
# From Paul Eggert (2002-10-20): |
# |
# The information in the rest of this paragraph is derived from the |
# Daylight Saving Time web page |
# <http://www.dlapr.lib.az.us/links/daylight.htm> (2002-01-23) |
# maintained by the Arizona State Library, Archives and Public Records. |
# Between 1944-01-01 and 1944-04-01 the State of Arizona used standard |
# time, but by federal law railroads, airlines, bus lines, military |
# personnel, and some engaged in interstate commerce continued to |
# observe war (i.e., daylight saving) time. The 1944-03-17 Phoenix |
# Gazette says that was the date the law changed, and that 04-01 was |
# the date the state's clocks would change. In 1945 the State of |
# Arizona used standard time all year, again with exceptions only as |
# mandated by federal law. Arizona observed DST in 1967, but Arizona |
# Laws 1968, ch. 183 (effective 1968-03-21) repealed DST. |
# |
# Shanks says the 1944 experiment came to an end on 1944-03-17. |
# Go with the Arizona State Library instead. |
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Phoenix -7:28:18 - LMT 1883 Nov 18 11:31:42 |
-7:00 US M%sT 1944 Jan 1 0:01 |
-7:00 - MST 1944 Apr 1 0:01 |
-7:00 US M%sT 1944 Oct 1 0:01 |
-7:00 - MST 1967 |
-7:00 US M%sT 1968 Mar 21 |
-7:00 - MST |
# From Arthur David Olson (1988-02-13): |
# A writer from the Inter Tribal Council of Arizona, Inc., |
# notes in private correspondence dated 1987-12-28 that "Presently, only the |
# Navajo Nation participates in the Daylight Saving Time policy, due to its |
# large size and location in three states." (The "only" means that other |
# tribal nations don't use DST.) |
# |
# From Paul Eggert (2013-08-26): |
# See America/Denver for a zone appropriate for the Navajo Nation. |
|
# Southern Idaho (Ada, Adams, Bannock, Bear Lake, Bingham, Blaine, |
# Boise, Bonneville, Butte, Camas, Canyon, Caribou, Cassia, Clark, |
# Custer, Elmore, Franklin, Fremont, Gem, Gooding, Jefferson, Jerome, |
# Lemhi, Lincoln, Madison, Minidoka, Oneida, Owyhee, Payette, Power, |
# Teton, Twin Falls, Valley, Washington counties, and the southern |
# quarter of Idaho county) and eastern Oregon (most of Malheur County) |
# switched four weeks late in 1974. |
# |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Boise -7:44:49 - LMT 1883 Nov 18 12:15:11 |
-8:00 US P%sT 1923 May 13 2:00 |
-7:00 US M%sT 1974 |
-7:00 - MST 1974 Feb 3 2:00 |
-7:00 US M%sT |
|
# Indiana |
# |
# For a map of Indiana's time zone regions, see: |
# http://en.wikipedia.org/wiki/Time_in_Indiana |
# |
# From Paul Eggert (2007-08-17): |
# Since 1970, most of Indiana has been like America/Indiana/Indianapolis, |
# with the following exceptions: |
# |
# - Gibson, Jasper, Lake, LaPorte, Newton, Porter, Posey, Spencer, |
# Vanderburgh, and Warrick counties have been like America/Chicago. |
# |
# - Dearborn and Ohio counties have been like America/New_York. |
# |
# - Clark, Floyd, and Harrison counties have been like |
# America/Kentucky/Louisville. |
# |
# - Crawford, Daviess, Dubois, Knox, Martin, Perry, Pike, Pulaski, Starke, |
# and Switzerland counties have their own time zone histories as noted below. |
# |
# Shanks partitioned Indiana into 345 regions, each with its own time history, |
# and wrote "Even newspaper reports present contradictory information." |
# Those Hoosiers! Such a flighty and changeable people! |
# Fortunately, most of the complexity occurred before our cutoff date of 1970. |
# |
# Other than Indianapolis, the Indiana place names are so nondescript |
# that they would be ambiguous if we left them at the 'America' level. |
# So we reluctantly put them all in a subdirectory 'America/Indiana'. |
|
# From Paul Eggert (2014-06-26): |
# https://www.federalregister.gov/articles/2006/01/20/06-563/standard-time-zone-boundary-in-the-state-of-indiana |
# says "DOT is relocating the time zone boundary in Indiana to move Starke, |
# Pulaski, Knox, Daviess, Martin, Pike, Dubois, and Perry Counties from the |
# Eastern Time Zone to the Central Time Zone.... The effective date of |
# this rule is 2 a.m. EST Sunday, April 2, 2006, which is the |
# changeover date from standard time to Daylight Saving Time." |
# Strictly speaking, this meant the affected counties changed their |
# clocks twice that night, but this obviously was in error. The intent |
# was that 01:59:59 EST be followed by 02:00:00 CDT. |
|
# From Gwillim Law (2007-02-10): |
# The Associated Press has been reporting that Pulaski County, Indiana is |
# going to switch from Central to Eastern Time on March 11, 2007.... |
# http://www.indystar.com/apps/pbcs.dll/article?AID=/20070207/LOCAL190108/702070524/0/LOCAL |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Indianapolis 1941 only - Jun 22 2:00 1:00 D |
Rule Indianapolis 1941 1954 - Sep lastSun 2:00 0 S |
Rule Indianapolis 1946 1954 - Apr lastSun 2:00 1:00 D |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Indiana/Indianapolis -5:44:38 - LMT 1883 Nov 18 12:15:22 |
-6:00 US C%sT 1920 |
-6:00 Indianapolis C%sT 1942 |
-6:00 US C%sT 1946 |
-6:00 Indianapolis C%sT 1955 Apr 24 2:00 |
-5:00 - EST 1957 Sep 29 2:00 |
-6:00 - CST 1958 Apr 27 2:00 |
-5:00 - EST 1969 |
-5:00 US E%sT 1971 |
-5:00 - EST 2006 |
-5:00 US E%sT |
# |
# Eastern Crawford County, Indiana, left its clocks alone in 1974, |
# as well as from 1976 through 2005. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Marengo 1951 only - Apr lastSun 2:00 1:00 D |
Rule Marengo 1951 only - Sep lastSun 2:00 0 S |
Rule Marengo 1954 1960 - Apr lastSun 2:00 1:00 D |
Rule Marengo 1954 1960 - Sep lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Indiana/Marengo -5:45:23 - LMT 1883 Nov 18 12:14:37 |
-6:00 US C%sT 1951 |
-6:00 Marengo C%sT 1961 Apr 30 2:00 |
-5:00 - EST 1969 |
-5:00 US E%sT 1974 Jan 6 2:00 |
-6:00 1:00 CDT 1974 Oct 27 2:00 |
-5:00 US E%sT 1976 |
-5:00 - EST 2006 |
-5:00 US E%sT |
# |
# Daviess, Dubois, Knox, and Martin Counties, Indiana, |
# switched from eastern to central time in April 2006, then switched back |
# in November 2007. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Vincennes 1946 only - Apr lastSun 2:00 1:00 D |
Rule Vincennes 1946 only - Sep lastSun 2:00 0 S |
Rule Vincennes 1953 1954 - Apr lastSun 2:00 1:00 D |
Rule Vincennes 1953 1959 - Sep lastSun 2:00 0 S |
Rule Vincennes 1955 only - May 1 0:00 1:00 D |
Rule Vincennes 1956 1963 - Apr lastSun 2:00 1:00 D |
Rule Vincennes 1960 only - Oct lastSun 2:00 0 S |
Rule Vincennes 1961 only - Sep lastSun 2:00 0 S |
Rule Vincennes 1962 1963 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Indiana/Vincennes -5:50:07 - LMT 1883 Nov 18 12:09:53 |
-6:00 US C%sT 1946 |
-6:00 Vincennes C%sT 1964 Apr 26 2:00 |
-5:00 - EST 1969 |
-5:00 US E%sT 1971 |
-5:00 - EST 2006 Apr 2 2:00 |
-6:00 US C%sT 2007 Nov 4 2:00 |
-5:00 US E%sT |
# |
# Perry County, Indiana, switched from eastern to central time in April 2006. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Perry 1946 only - Apr lastSun 2:00 1:00 D |
Rule Perry 1946 only - Sep lastSun 2:00 0 S |
Rule Perry 1953 1954 - Apr lastSun 2:00 1:00 D |
Rule Perry 1953 1959 - Sep lastSun 2:00 0 S |
Rule Perry 1955 only - May 1 0:00 1:00 D |
Rule Perry 1956 1963 - Apr lastSun 2:00 1:00 D |
Rule Perry 1960 only - Oct lastSun 2:00 0 S |
Rule Perry 1961 only - Sep lastSun 2:00 0 S |
Rule Perry 1962 1963 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Indiana/Tell_City -5:47:03 - LMT 1883 Nov 18 12:12:57 |
-6:00 US C%sT 1946 |
-6:00 Perry C%sT 1964 Apr 26 2:00 |
-5:00 - EST 1969 |
-5:00 US E%sT 1971 |
-5:00 - EST 2006 Apr 2 2:00 |
-6:00 US C%sT |
# |
# Pike County, Indiana moved from central to eastern time in 1977, |
# then switched back in 2006, then switched back again in 2007. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Pike 1955 only - May 1 0:00 1:00 D |
Rule Pike 1955 1960 - Sep lastSun 2:00 0 S |
Rule Pike 1956 1964 - Apr lastSun 2:00 1:00 D |
Rule Pike 1961 1964 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Indiana/Petersburg -5:49:07 - LMT 1883 Nov 18 12:10:53 |
-6:00 US C%sT 1955 |
-6:00 Pike C%sT 1965 Apr 25 2:00 |
-5:00 - EST 1966 Oct 30 2:00 |
-6:00 US C%sT 1977 Oct 30 2:00 |
-5:00 - EST 2006 Apr 2 2:00 |
-6:00 US C%sT 2007 Nov 4 2:00 |
-5:00 US E%sT |
# |
# Starke County, Indiana moved from central to eastern time in 1991, |
# then switched back in 2006. |
# From Arthur David Olson (1991-10-28): |
# An article on page A3 of the Sunday, 1991-10-27 Washington Post |
# notes that Starke County switched from Central time to Eastern time as of |
# 1991-10-27. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Starke 1947 1961 - Apr lastSun 2:00 1:00 D |
Rule Starke 1947 1954 - Sep lastSun 2:00 0 S |
Rule Starke 1955 1956 - Oct lastSun 2:00 0 S |
Rule Starke 1957 1958 - Sep lastSun 2:00 0 S |
Rule Starke 1959 1961 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Indiana/Knox -5:46:30 - LMT 1883 Nov 18 12:13:30 |
-6:00 US C%sT 1947 |
-6:00 Starke C%sT 1962 Apr 29 2:00 |
-5:00 - EST 1963 Oct 27 2:00 |
-6:00 US C%sT 1991 Oct 27 2:00 |
-5:00 - EST 2006 Apr 2 2:00 |
-6:00 US C%sT |
# |
# Pulaski County, Indiana, switched from eastern to central time in |
# April 2006 and then switched back in March 2007. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Pulaski 1946 1960 - Apr lastSun 2:00 1:00 D |
Rule Pulaski 1946 1954 - Sep lastSun 2:00 0 S |
Rule Pulaski 1955 1956 - Oct lastSun 2:00 0 S |
Rule Pulaski 1957 1960 - Sep lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Indiana/Winamac -5:46:25 - LMT 1883 Nov 18 12:13:35 |
-6:00 US C%sT 1946 |
-6:00 Pulaski C%sT 1961 Apr 30 2:00 |
-5:00 - EST 1969 |
-5:00 US E%sT 1971 |
-5:00 - EST 2006 Apr 2 2:00 |
-6:00 US C%sT 2007 Mar 11 2:00 |
-5:00 US E%sT |
# |
# Switzerland County, Indiana, did not observe DST from 1973 through 2005. |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Indiana/Vevay -5:40:16 - LMT 1883 Nov 18 12:19:44 |
-6:00 US C%sT 1954 Apr 25 2:00 |
-5:00 - EST 1969 |
-5:00 US E%sT 1973 |
-5:00 - EST 2006 |
-5:00 US E%sT |
|
# Part of Kentucky left its clocks alone in 1974. |
# This also includes Clark, Floyd, and Harrison counties in Indiana. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Louisville 1921 only - May 1 2:00 1:00 D |
Rule Louisville 1921 only - Sep 1 2:00 0 S |
Rule Louisville 1941 1961 - Apr lastSun 2:00 1:00 D |
Rule Louisville 1941 only - Sep lastSun 2:00 0 S |
Rule Louisville 1946 only - Jun 2 2:00 0 S |
Rule Louisville 1950 1955 - Sep lastSun 2:00 0 S |
Rule Louisville 1956 1960 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Kentucky/Louisville -5:43:02 - LMT 1883 Nov 18 12:16:58 |
-6:00 US C%sT 1921 |
-6:00 Louisville C%sT 1942 |
-6:00 US C%sT 1946 |
-6:00 Louisville C%sT 1961 Jul 23 2:00 |
-5:00 - EST 1968 |
-5:00 US E%sT 1974 Jan 6 2:00 |
-6:00 1:00 CDT 1974 Oct 27 2:00 |
-5:00 US E%sT |
# |
# Wayne County, Kentucky |
# |
# From Lake Cumberland LIFE |
# http://www.lake-cumberland.com/life/archive/news990129time.shtml |
# (1999-01-29) via WKYM-101.7: |
# Clinton County has joined Wayne County in asking the DoT to change from |
# the Central to the Eastern time zone.... The Wayne County government made |
# the same request in December. And while Russell County officials have not |
# taken action, the majority of respondents to a poll conducted there in |
# August indicated they would like to change to "fast time" also. |
# The three Lake Cumberland counties are the farthest east of any U.S. |
# location in the Central time zone. |
# |
# From Rich Wales (2000-08-29): |
# After prolonged debate, and despite continuing deep differences of opinion, |
# Wayne County (central Kentucky) is switching from Central (-0600) to Eastern |
# (-0500) time. They won't "fall back" this year. See Sara Shipley, |
# The difference an hour makes, Nando Times (2000-08-29 15:33 -0400). |
# |
# From Paul Eggert (2001-07-16): |
# The final rule was published in the |
# Federal Register 65, 160 (2000-08-17), pp 50154-50158. |
# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=2000_register&docid=fr17au00-22 |
# |
Zone America/Kentucky/Monticello -5:39:24 - LMT 1883 Nov 18 12:20:36 |
-6:00 US C%sT 1946 |
-6:00 - CST 1968 |
-6:00 US C%sT 2000 Oct 29 2:00 |
-5:00 US E%sT |
|
|
# From Rives McDow (2000-08-30): |
# Here ... are all the changes in the US since 1985. |
# Kearny County, KS (put all of county on central; |
# previously split between MST and CST) ... 1990-10 |
# Starke County, IN (from CST to EST) ... 1991-10 |
# Oliver County, ND (from MST to CST) ... 1992-10 |
# West Wendover, NV (from PST TO MST) ... 1999-10 |
# Wayne County, KY (from CST to EST) ... 2000-10 |
# |
# From Paul Eggert (2001-07-17): |
# We don't know where the line used to be within Kearny County, KS, |
# so omit that change for now. |
# See America/Indiana/Knox for the Starke County, IN change. |
# See America/North_Dakota/Center for the Oliver County, ND change. |
# West Wendover, NV officially switched from Pacific to mountain time on |
# 1999-10-31. See the |
# Federal Register 64, 203 (1999-10-21), pp 56705-56707. |
# http://frwebgate.access.gpo.gov/cgi-bin/getdoc.cgi?dbname=1999_register&docid=fr21oc99-15 |
# However, the Federal Register says that West Wendover already operated |
# on mountain time, and the rule merely made this official; |
# hence a separate tz entry is not needed. |
|
# Michigan |
# |
# From Bob Devine (1988-01-28): |
# Michigan didn't observe DST from 1968 to 1973. |
# |
# From Paul Eggert (1999-03-31): |
# Shanks writes that Michigan started using standard time on 1885-09-18, |
# but Howse writes (pp 124-125, referring to Popular Astronomy, 1901-01) |
# that Detroit kept |
# |
# local time until 1900 when the City Council decreed that clocks should |
# be put back twenty-eight minutes to Central Standard Time. Half the |
# city obeyed, half refused. After considerable debate, the decision |
# was rescinded and the city reverted to Sun time. A derisive offer to |
# erect a sundial in front of the city hall was referred to the |
# Committee on Sewers. Then, in 1905, Central time was adopted |
# by city vote. |
# |
# This story is too entertaining to be false, so go with Howse over Shanks. |
# |
# From Paul Eggert (2001-03-06): |
# Garland (1927) writes "Cleveland and Detroit advanced their clocks |
# one hour in 1914." This change is not in Shanks. We have no more |
# info, so omit this for now. |
# |
# Most of Michigan observed DST from 1973 on, but was a bit late in 1975. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Detroit 1948 only - Apr lastSun 2:00 1:00 D |
Rule Detroit 1948 only - Sep lastSun 2:00 0 S |
Rule Detroit 1967 only - Jun 14 2:00 1:00 D |
Rule Detroit 1967 only - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Detroit -5:32:11 - LMT 1905 |
-6:00 - CST 1915 May 15 2:00 |
-5:00 - EST 1942 |
-5:00 US E%sT 1946 |
-5:00 Detroit E%sT 1973 |
-5:00 US E%sT 1975 |
-5:00 - EST 1975 Apr 27 2:00 |
-5:00 US E%sT |
# |
# Dickinson, Gogebic, Iron, and Menominee Counties, Michigan, |
# switched from EST to CST/CDT in 1973. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER |
Rule Menominee 1946 only - Apr lastSun 2:00 1:00 D |
Rule Menominee 1946 only - Sep lastSun 2:00 0 S |
Rule Menominee 1966 only - Apr lastSun 2:00 1:00 D |
Rule Menominee 1966 only - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Menominee -5:50:27 - LMT 1885 Sep 18 12:00 |
-6:00 US C%sT 1946 |
-6:00 Menominee C%sT 1969 Apr 27 2:00 |
-5:00 - EST 1973 Apr 29 2:00 |
-6:00 US C%sT |
|
# Navassa |
# administered by the US Fish and Wildlife Service |
# claimed by US under the provisions of the 1856 Guano Islands Act |
# also claimed by Haiti |
# occupied 1857/1900 by the Navassa Phosphate Co |
# US lighthouse 1917/1996-09 |
# currently uninhabited |
# see Mark Fineman, "An Isle Rich in Guano and Discord", |
# _Los Angeles Times_ (1998-11-10), A1, A10; it cites |
# Jimmy Skaggs, _The Great Guano Rush_ (1994). |
|
################################################################################ |
|
|
# From Paul Eggert (2014-10-31): |
# |
# Unless otherwise specified, the source for data through 1990 is: |
# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition), |
# San Diego: ACS Publications, Inc. (2003). |
# Unfortunately this book contains many errors and cites no sources. |
# |
# Gwillim Law writes that a good source |
# for recent time zone data is the International Air Transport |
# Association's Standard Schedules Information Manual (IATA SSIM), |
# published semiannually. Law sent in several helpful summaries |
# of the IATA's data after 1990. Except where otherwise noted, |
# IATA SSIM is the source for entries after 1990. |
# |
# Other sources occasionally used include: |
# |
# Edward W. Whitman, World Time Differences, |
# Whitman Publishing Co, 2 Niagara Av, Ealing, London (undated), |
# which I found in the UCLA library. |
# |
# William Willett, The Waste of Daylight, 19th edition |
# <http://cs.ucla.edu/~eggert/The-Waste-of-Daylight-19th.pdf> |
# [PDF] (1914-03) |
# |
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94 |
# <http://www.jstor.org/stable/1774359>. |
# |
# See the 'europe' file for Greenland. |
|
# Canada |
|
# From Alain LaBonté (1994-11-14): |
# I post here the time zone abbreviations standardized in Canada |
# for both English and French in the CAN/CSA-Z234.4-89 standard.... |
# |
# UTC Standard time Daylight saving time |
# offset French English French English |
# -2:30 - - HAT NDT |
# -3 - - HAA ADT |
# -3:30 HNT NST - - |
# -4 HNA AST HAE EDT |
# -5 HNE EST HAC CDT |
# -6 HNC CST HAR MDT |
# -7 HNR MST HAP PDT |
# -8 HNP PST HAY YDT |
# -9 HNY YST - - |
# |
# HN: Heure Normale ST: Standard Time |
# HA: Heure Avancée DT: Daylight saving Time |
# |
# A: de l'Atlantique Atlantic |
# C: du Centre Central |
# E: de l'Est Eastern |
# M: Mountain |
# N: Newfoundland |
# P: du Pacifique Pacific |
# R: des Rocheuses |
# T: de Terre-Neuve |
# Y: du Yukon Yukon |
# |
# From Paul Eggert (1994-11-22): |
# Alas, this sort of thing must be handled by localization software. |
|
# Unless otherwise specified, the data entries for Canada are all from Shanks |
# & Pottenger. |
|
# From Chris Walton (2006-04-01, 2006-04-25, 2006-06-26, 2007-01-31, |
# 2007-03-01): |
# The British Columbia government announced yesterday that it will |
# adjust daylight savings next year to align with changes in the |
# U.S. and the rest of Canada.... |
# http://www2.news.gov.bc.ca/news_releases_2005-2009/2006AG0014-000330.htm |
# ... |
# Nova Scotia |
# Daylight saving time will be extended by four weeks starting in 2007.... |
# http://www.gov.ns.ca/just/regulations/rg2/2006/ma1206.pdf |
# |
# [For New Brunswick] the new legislation dictates that the time change is to |
# be done at 02:00 instead of 00:01. |
# http://www.gnb.ca/0062/acts/BBA-2006/Chap-19.pdf |
# ... |
# Manitoba has traditionally changed the clock every fall at 03:00. |
# As of 2006, the transition is to take place one hour earlier at 02:00. |
# http://web2.gov.mb.ca/laws/statutes/ccsm/o030e.php |
# ... |
# [Alberta, Ontario, Quebec] will follow US rules. |
# http://www.qp.gov.ab.ca/documents/spring/CH03_06.CFM |
# http://www.e-laws.gov.on.ca/DBLaws/Source/Regs/English/2006/R06111_e.htm |
# http://www2.publicationsduquebec.gouv.qc.ca/dynamicSearch/telecharge.php?type=5&file=2006C39A.PDF |
# ... |
# P.E.I. will follow US rules.... |
# http://www.assembly.pe.ca/bills/pdf_chapter/62/3/chapter-41.pdf |
# ... |
# Province of Newfoundland and Labrador.... |
# http://www.hoa.gov.nl.ca/hoa/bills/Bill0634.htm |
# ... |
# Yukon |
# http://www.gov.yk.ca/legislation/regs/oic2006_127.pdf |
# ... |
# N.W.T. will follow US rules. Whoever maintains the government web site |
# does not seem to believe in bookmarks. To see the news release, click the |
# following link and search for "Daylight Savings Time Change". Press the |
# "Daylight Savings Time Change" link; it will fire off a popup using |
# JavaScript. |
# http://www.exec.gov.nt.ca/currentnews/currentPR.asp?mode=archive |
# ... |
# Nunavut |
# An amendment to the Interpretation Act was registered on February 19/2007.... |
# http://action.attavik.ca/home/justice-gn/attach/2007/gaz02part2.pdf |
|
# From Paul Eggert (2014-10-18): |
# H. David Matthews and Mary Vincent's map |
# "It's about TIME", _Canadian Geographic_ (September-October 1998) |
# http://www.canadiangeographic.ca/Magazine/SO98/alacarte.asp |
# contains detailed boundaries for regions observing nonstandard |
# time and daylight saving time arrangements in Canada circa 1998. |
# |
# National Research Council Canada maintains info about time zones and DST. |
# http://www.nrc-cnrc.gc.ca/eng/services/time/time_zones.html |
# http://www.nrc-cnrc.gc.ca/eng/services/time/faq/index.html#Q5 |
# Its unofficial information is often taken from Matthews and Vincent. |
|
# From Paul Eggert (2006-06-27): |
# For now, assume all of DST-observing Canada will fall into line with the |
# new US DST rules, |
|
# From Chris Walton (2011-12-01) |
# In the first of Tammy Hardwick's articles |
# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 |
# she quotes the Friday November 1/1918 edition of the Creston Review. |
# The quote includes these two statements: |
# 'Sunday the CPR went back to the old system of time...' |
# '... The daylight saving scheme was dropped all over Canada at the same time,' |
# These statements refer to a transition from daylight time to standard time |
# that occurred nationally on Sunday October 27/1918. This transition was |
# also documented in the Saturday October 26/1918 edition of the Toronto Star. |
|
# In light of that evidence, we alter the date from the earlier believed |
# Oct 31, to Oct 27, 1918 (and Sunday is a more likely transition day |
# than Thursday) in all Canadian rulesets. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Canada 1918 only - Apr 14 2:00 1:00 D |
Rule Canada 1918 only - Oct 27 2:00 0 S |
Rule Canada 1942 only - Feb 9 2:00 1:00 W # War |
Rule Canada 1945 only - Aug 14 23:00u 1:00 P # Peace |
Rule Canada 1945 only - Sep 30 2:00 0 S |
Rule Canada 1974 1986 - Apr lastSun 2:00 1:00 D |
Rule Canada 1974 2006 - Oct lastSun 2:00 0 S |
Rule Canada 1987 2006 - Apr Sun>=1 2:00 1:00 D |
Rule Canada 2007 max - Mar Sun>=8 2:00 1:00 D |
Rule Canada 2007 max - Nov Sun>=1 2:00 0 S |
|
|
# Newfoundland and Labrador |
|
# From Paul Eggert (2000-10-02): |
# Matthews and Vincent (1998) write that Labrador should use NST/NDT, |
# but the only part of Labrador that follows the rules is the |
# southeast corner, including Port Hope Simpson and Mary's Harbour, |
# but excluding, say, Black Tickle. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule StJohns 1917 only - Apr 8 2:00 1:00 D |
Rule StJohns 1917 only - Sep 17 2:00 0 S |
# Whitman gives 1919 Apr 5 and 1920 Apr 5; go with Shanks & Pottenger. |
Rule StJohns 1919 only - May 5 23:00 1:00 D |
Rule StJohns 1919 only - Aug 12 23:00 0 S |
# For 1931-1935 Whitman gives Apr same date; go with Shanks & Pottenger. |
Rule StJohns 1920 1935 - May Sun>=1 23:00 1:00 D |
Rule StJohns 1920 1935 - Oct lastSun 23:00 0 S |
# For 1936-1941 Whitman gives May Sun>=8 and Oct Sun>=1; go with Shanks & |
# Pottenger. |
Rule StJohns 1936 1941 - May Mon>=9 0:00 1:00 D |
Rule StJohns 1936 1941 - Oct Mon>=2 0:00 0 S |
# Whitman gives the following transitions: |
# 1942 03-01/12-31, 1943 05-30/09-05, 1944 07-10/09-02, 1945 01-01/10-07 |
# but go with Shanks & Pottenger and assume they used Canadian rules. |
# For 1946-9 Whitman gives May 5,4,9,1 - Oct 1,5,3,2, and for 1950 he gives |
# Apr 30 - Sep 24; go with Shanks & Pottenger. |
Rule StJohns 1946 1950 - May Sun>=8 2:00 1:00 D |
Rule StJohns 1946 1950 - Oct Sun>=2 2:00 0 S |
Rule StJohns 1951 1986 - Apr lastSun 2:00 1:00 D |
Rule StJohns 1951 1959 - Sep lastSun 2:00 0 S |
Rule StJohns 1960 1986 - Oct lastSun 2:00 0 S |
# From Paul Eggert (2000-10-02): |
# INMS (2000-09-12) says that, since 1988 at least, Newfoundland switches |
# at 00:01 local time. For now, assume it started in 1987. |
|
# From Michael Pelley (2011-09-12): |
# We received today, Monday, September 12, 2011, notification that the |
# changes to the Newfoundland Standard Time Act have been proclaimed. |
# The change in the Act stipulates that the change from Daylight Savings |
# Time to Standard Time and from Standard Time to Daylight Savings Time |
# now occurs at 2:00AM. |
# ... |
# http://www.assembly.nl.ca/legislation/sr/annualstatutes/2011/1106.chp.htm |
# ... |
# MICHAEL PELLEY | Manager of Enterprise Architecture - Solution Delivery |
# Office of the Chief Information Officer |
# Executive Council |
# Government of Newfoundland & Labrador |
|
Rule StJohns 1987 only - Apr Sun>=1 0:01 1:00 D |
Rule StJohns 1987 2006 - Oct lastSun 0:01 0 S |
Rule StJohns 1988 only - Apr Sun>=1 0:01 2:00 DD |
Rule StJohns 1989 2006 - Apr Sun>=1 0:01 1:00 D |
Rule StJohns 2007 2011 - Mar Sun>=8 0:01 1:00 D |
Rule StJohns 2007 2010 - Nov Sun>=1 0:01 0 S |
# |
# St John's has an apostrophe, but Posix file names can't have apostrophes. |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/St_Johns -3:30:52 - LMT 1884 |
-3:30:52 StJohns N%sT 1918 |
-3:30:52 Canada N%sT 1919 |
-3:30:52 StJohns N%sT 1935 Mar 30 |
-3:30 StJohns N%sT 1942 May 11 |
-3:30 Canada N%sT 1946 |
-3:30 StJohns N%sT 2011 Nov |
-3:30 Canada N%sT |
|
# most of east Labrador |
|
# The name 'Happy Valley-Goose Bay' is too long; use 'Goose Bay'. |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Goose_Bay -4:01:40 - LMT 1884 # Happy Valley-Goose Bay |
-3:30:52 - NST 1918 |
-3:30:52 Canada N%sT 1919 |
-3:30:52 - NST 1935 Mar 30 |
-3:30 - NST 1936 |
-3:30 StJohns N%sT 1942 May 11 |
-3:30 Canada N%sT 1946 |
-3:30 StJohns N%sT 1966 Mar 15 2:00 |
-4:00 StJohns A%sT 2011 Nov |
-4:00 Canada A%sT |
|
|
# west Labrador, Nova Scotia, Prince Edward I |
|
# From Brian Inglis (2015-07-20): |
# From the historical weather station records available at: |
# https://weatherspark.com/history/28351/1971/Sydney-Nova-Scotia-Canada |
# Sydney shares the same time history as Glace Bay, so was |
# likely to be the same across the island.... |
# Sydney, as the capital and most populous location, or Cape Breton, would |
# have been better names for the zone had we known this in 1996. |
|
# From Paul Eggert (2015-07-20): |
# Shanks & Pottenger write that since 1970 most of this region has been like |
# Halifax. Many locales did not observe peacetime DST until 1972; |
# the Cape Breton area, represented by Glace Bay, is the largest we know of |
# (Glace Bay was perhaps not the best name choice but no point changing now). |
# Shanks & Pottenger also write that Liverpool, NS was the only town |
# in Canada to observe DST in 1971 but not 1970; for now we'll assume |
# this is a typo. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Halifax 1916 only - Apr 1 0:00 1:00 D |
Rule Halifax 1916 only - Oct 1 0:00 0 S |
Rule Halifax 1920 only - May 9 0:00 1:00 D |
Rule Halifax 1920 only - Aug 29 0:00 0 S |
Rule Halifax 1921 only - May 6 0:00 1:00 D |
Rule Halifax 1921 1922 - Sep 5 0:00 0 S |
Rule Halifax 1922 only - Apr 30 0:00 1:00 D |
Rule Halifax 1923 1925 - May Sun>=1 0:00 1:00 D |
Rule Halifax 1923 only - Sep 4 0:00 0 S |
Rule Halifax 1924 only - Sep 15 0:00 0 S |
Rule Halifax 1925 only - Sep 28 0:00 0 S |
Rule Halifax 1926 only - May 16 0:00 1:00 D |
Rule Halifax 1926 only - Sep 13 0:00 0 S |
Rule Halifax 1927 only - May 1 0:00 1:00 D |
Rule Halifax 1927 only - Sep 26 0:00 0 S |
Rule Halifax 1928 1931 - May Sun>=8 0:00 1:00 D |
Rule Halifax 1928 only - Sep 9 0:00 0 S |
Rule Halifax 1929 only - Sep 3 0:00 0 S |
Rule Halifax 1930 only - Sep 15 0:00 0 S |
Rule Halifax 1931 1932 - Sep Mon>=24 0:00 0 S |
Rule Halifax 1932 only - May 1 0:00 1:00 D |
Rule Halifax 1933 only - Apr 30 0:00 1:00 D |
Rule Halifax 1933 only - Oct 2 0:00 0 S |
Rule Halifax 1934 only - May 20 0:00 1:00 D |
Rule Halifax 1934 only - Sep 16 0:00 0 S |
Rule Halifax 1935 only - Jun 2 0:00 1:00 D |
Rule Halifax 1935 only - Sep 30 0:00 0 S |
Rule Halifax 1936 only - Jun 1 0:00 1:00 D |
Rule Halifax 1936 only - Sep 14 0:00 0 S |
Rule Halifax 1937 1938 - May Sun>=1 0:00 1:00 D |
Rule Halifax 1937 1941 - Sep Mon>=24 0:00 0 S |
Rule Halifax 1939 only - May 28 0:00 1:00 D |
Rule Halifax 1940 1941 - May Sun>=1 0:00 1:00 D |
Rule Halifax 1946 1949 - Apr lastSun 2:00 1:00 D |
Rule Halifax 1946 1949 - Sep lastSun 2:00 0 S |
Rule Halifax 1951 1954 - Apr lastSun 2:00 1:00 D |
Rule Halifax 1951 1954 - Sep lastSun 2:00 0 S |
Rule Halifax 1956 1959 - Apr lastSun 2:00 1:00 D |
Rule Halifax 1956 1959 - Sep lastSun 2:00 0 S |
Rule Halifax 1962 1973 - Apr lastSun 2:00 1:00 D |
Rule Halifax 1962 1973 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Halifax -4:14:24 - LMT 1902 Jun 15 |
-4:00 Halifax A%sT 1918 |
-4:00 Canada A%sT 1919 |
-4:00 Halifax A%sT 1942 Feb 9 2:00s |
-4:00 Canada A%sT 1946 |
-4:00 Halifax A%sT 1974 |
-4:00 Canada A%sT |
Zone America/Glace_Bay -3:59:48 - LMT 1902 Jun 15 |
-4:00 Canada A%sT 1953 |
-4:00 Halifax A%sT 1954 |
-4:00 - AST 1972 |
-4:00 Halifax A%sT 1974 |
-4:00 Canada A%sT |
|
# New Brunswick |
|
# From Paul Eggert (2007-01-31): |
# The Time Definition Act <http://www.gnb.ca/0062/PDF-acts/t-06.pdf> |
# says they changed at 00:01 through 2006, and |
# <http://www.canlii.org/nb/laws/sta/t-6/20030127/whole.html> makes it |
# clear that this was the case since at least 1993. |
# For now, assume it started in 1993. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Moncton 1933 1935 - Jun Sun>=8 1:00 1:00 D |
Rule Moncton 1933 1935 - Sep Sun>=8 1:00 0 S |
Rule Moncton 1936 1938 - Jun Sun>=1 1:00 1:00 D |
Rule Moncton 1936 1938 - Sep Sun>=1 1:00 0 S |
Rule Moncton 1939 only - May 27 1:00 1:00 D |
Rule Moncton 1939 1941 - Sep Sat>=21 1:00 0 S |
Rule Moncton 1940 only - May 19 1:00 1:00 D |
Rule Moncton 1941 only - May 4 1:00 1:00 D |
Rule Moncton 1946 1972 - Apr lastSun 2:00 1:00 D |
Rule Moncton 1946 1956 - Sep lastSun 2:00 0 S |
Rule Moncton 1957 1972 - Oct lastSun 2:00 0 S |
Rule Moncton 1993 2006 - Apr Sun>=1 0:01 1:00 D |
Rule Moncton 1993 2006 - Oct lastSun 0:01 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Moncton -4:19:08 - LMT 1883 Dec 9 |
-5:00 - EST 1902 Jun 15 |
-4:00 Canada A%sT 1933 |
-4:00 Moncton A%sT 1942 |
-4:00 Canada A%sT 1946 |
-4:00 Moncton A%sT 1973 |
-4:00 Canada A%sT 1993 |
-4:00 Moncton A%sT 2007 |
-4:00 Canada A%sT |
|
# Quebec |
|
# From Paul Eggert (2015-03-24): |
# See America/Toronto for most of Quebec, including Montreal. |
# |
# Matthews and Vincent (1998) also write that Quebec east of the -63 |
# meridian is supposed to observe AST, but residents as far east as |
# Natashquan use EST/EDT, and residents east of Natashquan use AST. |
# The Quebec department of justice writes in |
# "The situation in Minganie and Basse-Côte-Nord" |
# http://www.justice.gouv.qc.ca/english/publications/generale/temps-minganie-a.htm |
# that the coastal strip from just east of Natashquan to Blanc-Sablon |
# observes Atlantic standard time all year round. |
# http://www.assnat.qc.ca/Media/Process.aspx?MediaId=ANQ.Vigie.Bll.DocumentGenerique_8845en |
# says this common practice was codified into law as of 2007. |
# For lack of better info, guess this practice began around 1970, contra to |
# Shanks & Pottenger who have this region observing AST/ADT. |
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Blanc-Sablon -3:48:28 - LMT 1884 |
-4:00 Canada A%sT 1970 |
-4:00 - AST |
|
# Ontario |
|
# From Paul Eggert (2006-07-09): |
# Shanks & Pottenger write that since 1970 most of Ontario has been like |
# Toronto. |
# Thunder Bay skipped DST in 1973. |
# Many smaller locales did not observe peacetime DST until 1974; |
# Nipigon (EST) and Rainy River (CST) are the largest that we know of. |
# Far west Ontario is like Winnipeg; far east Quebec is like Halifax. |
|
# From Mark Brader (2003-07-26): |
# [According to the Toronto Star] Orillia, Ontario, adopted DST |
# effective Saturday, 1912-06-22, 22:00; the article mentions that |
# Port Arthur (now part of Thunder Bay, Ontario) as well as Moose Jaw |
# have already done so. In Orillia DST was to run until Saturday, |
# 1912-08-31 (no time mentioned), but it was met with considerable |
# hostility from certain segments of the public, and was revoked after |
# only two weeks - I copied it as Saturday, 1912-07-07, 22:00, but |
# presumably that should be -07-06. (1912-06-19, -07-12; also letters |
# earlier in June). |
# |
# Kenora, Ontario, was to abandon DST on 1914-06-01 (-05-21). |
|
# From Paul Eggert (1997-10-17): |
# Mark Brader writes that an article in the 1997-10-14 Toronto Star |
# says that Atikokan, Ontario currently does not observe DST, |
# but will vote on 11-10 whether to use EST/EDT. |
# He also writes that the Ontario Time Act (1990, Chapter T.9) |
# http://www.gov.on.ca/MBS/english/publications/statregs/conttext.html |
# says that Ontario east of 90W uses EST/EDT, and west of 90W uses CST/CDT. |
# Officially Atikokan is therefore on CST/CDT, and most likely this report |
# concerns a non-official time observed as a matter of local practice. |
# |
# From Paul Eggert (2000-10-02): |
# Matthews and Vincent (1998) write that Atikokan, Pickle Lake, and |
# New Osnaburgh observe CST all year, that Big Trout Lake observes |
# CST/CDT, and that Upsala and Shebandowan observe EST/EDT, all in |
# violation of the official Ontario rules. |
# |
# From Paul Eggert (2006-07-09): |
# Chris Walton (2006-07-06) mentioned an article by Stephanie MacLellan in the |
# 2005-07-21 Chronicle-Journal, which said: |
# |
# The clocks in Atikokan stay set on standard time year-round. |
# This means they spend about half the time on central time and |
# the other half on eastern time. |
# |
# For the most part, the system works, Mayor Dennis Brown said. |
# |
# "The majority of businesses in Atikokan deal more with Eastern |
# Canada, but there are some that deal with Western Canada," he |
# said. "I don't see any changes happening here." |
# |
# Walton also writes "Supposedly Pickle Lake and Mishkeegogamang |
# [New Osnaburgh] follow the same practice." |
|
# From Garry McKinnon (2006-07-14) via Chris Walton: |
# I chatted with a member of my board who has an outstanding memory |
# and a long history in Atikokan (and in the telecom industry) and he |
# can say for certain that Atikokan has been practicing the current |
# time keeping since 1952, at least. |
|
# From Paul Eggert (2006-07-17): |
# Shanks & Pottenger say that Atikokan has agreed with Rainy River |
# ever since standard time was introduced, but the information from |
# McKinnon sounds more authoritative. For now, assume that Atikokan |
# switched to EST immediately after WWII era daylight saving time |
# ended. This matches the old (less-populous) America/Coral_Harbour |
# entry since our cutoff date of 1970, so we can move |
# America/Coral_Harbour to the 'backward' file. |
|
# From Mark Brader (2010-03-06): |
# |
# Currently the database has: |
# |
# # Ontario |
# |
# # From Paul Eggert (2006-07-09): |
# # Shanks & Pottenger write that since 1970 most of Ontario has been like |
# # Toronto. |
# # Thunder Bay skipped DST in 1973. |
# # Many smaller locales did not observe peacetime DST until 1974; |
# # Nipigon (EST) and Rainy River (CST) are the largest that we know of. |
# |
# In the (Toronto) Globe and Mail for Saturday, 1955-09-24, in the bottom |
# right corner of page 1, it says that Toronto will return to standard |
# time at 2 am Sunday morning (which agrees with the database), and that: |
# |
# The one-hour setback will go into effect throughout most of Ontario, |
# except in areas like Windsor which remains on standard time all year. |
# |
# Windsor is, of course, a lot larger than Nipigon. |
# |
# I only came across this incidentally. I don't know if Windsor began |
# observing DST when Detroit did, or in 1974, or on some other date. |
# |
# By the way, the article continues by noting that: |
# |
# Some cities in the United States have pushed the deadline back |
# three weeks and will change over from daylight saving in October. |
|
# From Arthur David Olson (2010-07-17): |
# |
# "Standard Time and Time Zones in Canada" appeared in |
# The Journal of The Royal Astronomical Society of Canada, |
# volume 26, number 2 (February 1932) and, as of 2010-07-17, |
# was available at |
# http://adsabs.harvard.edu/full/1932JRASC..26...49S |
# |
# It includes the text below (starting on page 57): |
# |
# A list of the places in Canada using daylight saving time would |
# require yearly revision. From information kindly furnished by |
# the provincial governments and by the postmasters in many cities |
# and towns, it is found that the following places used daylight sav- |
# ing in 1930. The information for the province of Quebec is definite, |
# for the other provinces only approximate: |
# |
# Province Daylight saving time used |
# Prince Edward Island Not used. |
# Nova Scotia In Halifax only. |
# New Brunswick In St. John only. |
# Quebec In the following places: |
# Montreal Lachine |
# Quebec Mont-Royal |
# Lévis Iberville |
# St. Lambert Cap de la Madelèine |
# Verdun Loretteville |
# Westmount Richmond |
# Outremont St. Jérôme |
# Longueuil Greenfield Park |
# Arvida Waterloo |
# Chambly-Canton Beaulieu |
# Melbourne La Tuque |
# St. Théophile Buckingham |
# Ontario Used generally in the cities and towns along |
# the southerly part of the province. Not |
# used in the northwesterly part. |
# Manitoba Not used. |
# Saskatchewan In Regina only. |
# Alberta Not used. |
# British Columbia Not used. |
# |
# With some exceptions, the use of daylight saving may be said to be limited |
# to those cities and towns lying between Quebec city and Windsor, Ont. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Toronto 1919 only - Mar 30 23:30 1:00 D |
Rule Toronto 1919 only - Oct 26 0:00 0 S |
Rule Toronto 1920 only - May 2 2:00 1:00 D |
Rule Toronto 1920 only - Sep 26 0:00 0 S |
Rule Toronto 1921 only - May 15 2:00 1:00 D |
Rule Toronto 1921 only - Sep 15 2:00 0 S |
Rule Toronto 1922 1923 - May Sun>=8 2:00 1:00 D |
# Shanks & Pottenger say 1923-09-19; assume it's a typo and that "-16" |
# was meant. |
Rule Toronto 1922 1926 - Sep Sun>=15 2:00 0 S |
Rule Toronto 1924 1927 - May Sun>=1 2:00 1:00 D |
# The 1927-to-1939 rules can be expressed more simply as |
# Rule Toronto 1927 1937 - Sep Sun>=25 2:00 0 S |
# Rule Toronto 1928 1937 - Apr Sun>=25 2:00 1:00 D |
# Rule Toronto 1938 1940 - Apr lastSun 2:00 1:00 D |
# Rule Toronto 1938 1939 - Sep lastSun 2:00 0 S |
# The rules below avoid use of Sun>=25 |
# (which pre-2004 versions of zic cannot handle). |
Rule Toronto 1927 1932 - Sep lastSun 2:00 0 S |
Rule Toronto 1928 1931 - Apr lastSun 2:00 1:00 D |
Rule Toronto 1932 only - May 1 2:00 1:00 D |
Rule Toronto 1933 1940 - Apr lastSun 2:00 1:00 D |
Rule Toronto 1933 only - Oct 1 2:00 0 S |
Rule Toronto 1934 1939 - Sep lastSun 2:00 0 S |
Rule Toronto 1945 1946 - Sep lastSun 2:00 0 S |
Rule Toronto 1946 only - Apr lastSun 2:00 1:00 D |
Rule Toronto 1947 1949 - Apr lastSun 0:00 1:00 D |
Rule Toronto 1947 1948 - Sep lastSun 0:00 0 S |
Rule Toronto 1949 only - Nov lastSun 0:00 0 S |
Rule Toronto 1950 1973 - Apr lastSun 2:00 1:00 D |
Rule Toronto 1950 only - Nov lastSun 2:00 0 S |
Rule Toronto 1951 1956 - Sep lastSun 2:00 0 S |
# Shanks & Pottenger say Toronto ended DST a week early in 1971, |
# namely on 1971-10-24, but Mark Brader wrote (2003-05-31) that this |
# is wrong, and that he had confirmed it by checking the 1971-10-30 |
# Toronto Star, which said that DST was ending 1971-10-31 as usual. |
Rule Toronto 1957 1973 - Oct lastSun 2:00 0 S |
|
# From Paul Eggert (2003-07-27): |
# Willett (1914-03) writes (p. 17) "In the Cities of Fort William, and |
# Port Arthur, Ontario, the principle of the Bill has been in |
# operation for the past three years, and in the City of Moose Jaw, |
# Saskatchewan, for one year." |
|
# From David Bryan via Tory Tronrud, Director/Curator, |
# Thunder Bay Museum (2003-11-12): |
# There is some suggestion, however, that, by-law or not, daylight |
# savings time was being practiced in Fort William and Port Arthur |
# before 1909.... [I]n 1910, the line between the Eastern and Central |
# Time Zones was permanently moved about two hundred miles west to |
# include the Thunder Bay area.... When Canada adopted daylight |
# savings time in 1916, Fort William and Port Arthur, having done so |
# already, did not change their clocks.... During the Second World |
# War,... [t]he cities agreed to implement DST during the summer |
# months for the remainder of the war years. |
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Toronto -5:17:32 - LMT 1895 |
-5:00 Canada E%sT 1919 |
-5:00 Toronto E%sT 1942 Feb 9 2:00s |
-5:00 Canada E%sT 1946 |
-5:00 Toronto E%sT 1974 |
-5:00 Canada E%sT |
Zone America/Thunder_Bay -5:57:00 - LMT 1895 |
-6:00 - CST 1910 |
-5:00 - EST 1942 |
-5:00 Canada E%sT 1970 |
-5:00 Toronto E%sT 1973 |
-5:00 - EST 1974 |
-5:00 Canada E%sT |
Zone America/Nipigon -5:53:04 - LMT 1895 |
-5:00 Canada E%sT 1940 Sep 29 |
-5:00 1:00 EDT 1942 Feb 9 2:00s |
-5:00 Canada E%sT |
Zone America/Rainy_River -6:18:16 - LMT 1895 |
-6:00 Canada C%sT 1940 Sep 29 |
-6:00 1:00 CDT 1942 Feb 9 2:00s |
-6:00 Canada C%sT |
Zone America/Atikokan -6:06:28 - LMT 1895 |
-6:00 Canada C%sT 1940 Sep 29 |
-6:00 1:00 CDT 1942 Feb 9 2:00s |
-6:00 Canada C%sT 1945 Sep 30 2:00 |
-5:00 - EST |
|
|
# Manitoba |
|
# From Rob Douglas (2006-04-06): |
# the old Manitoba Time Act - as amended by Bill 2, assented to |
# March 27, 1987 ... said ... |
# "between two o'clock Central Standard Time in the morning of |
# the first Sunday of April of each year and two o'clock Central |
# Standard Time in the morning of the last Sunday of October next |
# following, one hour in advance of Central Standard Time."... |
# I believe that the English legislation [of the old time act] had |
# been assented to (March 22, 1967).... |
# Also, as far as I can tell, there was no order-in-council varying |
# the time of Daylight Saving Time for 2005 and so the provisions of |
# the 1987 version would apply - the changeover was at 2:00 Central |
# Standard Time (i.e. not until 3:00 Central Daylight Time). |
|
# From Paul Eggert (2006-04-10): |
# Shanks & Pottenger say Manitoba switched at 02:00 (not 02:00s) |
# starting 1966. Since 02:00s is clearly correct for 1967 on, assume |
# it was also 02:00s in 1966. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Winn 1916 only - Apr 23 0:00 1:00 D |
Rule Winn 1916 only - Sep 17 0:00 0 S |
Rule Winn 1918 only - Apr 14 2:00 1:00 D |
Rule Winn 1918 only - Oct 27 2:00 0 S |
Rule Winn 1937 only - May 16 2:00 1:00 D |
Rule Winn 1937 only - Sep 26 2:00 0 S |
Rule Winn 1942 only - Feb 9 2:00 1:00 W # War |
Rule Winn 1945 only - Aug 14 23:00u 1:00 P # Peace |
Rule Winn 1945 only - Sep lastSun 2:00 0 S |
Rule Winn 1946 only - May 12 2:00 1:00 D |
Rule Winn 1946 only - Oct 13 2:00 0 S |
Rule Winn 1947 1949 - Apr lastSun 2:00 1:00 D |
Rule Winn 1947 1949 - Sep lastSun 2:00 0 S |
Rule Winn 1950 only - May 1 2:00 1:00 D |
Rule Winn 1950 only - Sep 30 2:00 0 S |
Rule Winn 1951 1960 - Apr lastSun 2:00 1:00 D |
Rule Winn 1951 1958 - Sep lastSun 2:00 0 S |
Rule Winn 1959 only - Oct lastSun 2:00 0 S |
Rule Winn 1960 only - Sep lastSun 2:00 0 S |
Rule Winn 1963 only - Apr lastSun 2:00 1:00 D |
Rule Winn 1963 only - Sep 22 2:00 0 S |
Rule Winn 1966 1986 - Apr lastSun 2:00s 1:00 D |
Rule Winn 1966 2005 - Oct lastSun 2:00s 0 S |
Rule Winn 1987 2005 - Apr Sun>=1 2:00s 1:00 D |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Winnipeg -6:28:36 - LMT 1887 Jul 16 |
-6:00 Winn C%sT 2006 |
-6:00 Canada C%sT |
|
|
# Saskatchewan |
|
# From Mark Brader (2003-07-26): |
# The first actual adoption of DST in Canada was at the municipal |
# level. As the [Toronto] Star put it (1912-06-07), "While people |
# elsewhere have long been talking of legislation to save daylight, |
# the city of Moose Jaw [Saskatchewan] has acted on its own hook." |
# DST in Moose Jaw began on Saturday, 1912-06-01 (no time mentioned: |
# presumably late evening, as below), and would run until "the end of |
# the summer". The discrepancy between municipal time and railroad |
# time was noted. |
|
# From Paul Eggert (2003-07-27): |
# Willett (1914-03) notes that DST "has been in operation ... in the |
# City of Moose Jaw, Saskatchewan, for one year." |
|
# From Paul Eggert (2006-03-22): |
# Shanks & Pottenger say that since 1970 this region has mostly been as Regina. |
# Some western towns (e.g. Swift Current) switched from MST/MDT to CST in 1972. |
# Other western towns (e.g. Lloydminster) are like Edmonton. |
# Matthews and Vincent (1998) write that Denare Beach and Creighton |
# are like Winnipeg, in violation of Saskatchewan law. |
|
# From W. Jones (1992-11-06): |
# The. . .below is based on information I got from our law library, the |
# provincial archives, and the provincial Community Services department. |
# A precise history would require digging through newspaper archives, and |
# since you didn't say what you wanted, I didn't bother. |
# |
# Saskatchewan is split by a time zone meridian (105W) and over the years |
# the boundary became pretty ragged as communities near it reevaluated |
# their affiliations in one direction or the other. In 1965 a provincial |
# referendum favoured legislating common time practices. |
# |
# On 15 April 1966 the Time Act (c. T-14, Revised Statutes of |
# Saskatchewan 1978) was proclaimed, and established that the eastern |
# part of Saskatchewan would use CST year round, that districts in |
# northwest Saskatchewan would by default follow CST but could opt to |
# follow Mountain Time rules (thus 1 hour difference in the winter and |
# zero in the summer), and that districts in southwest Saskatchewan would |
# by default follow MT but could opt to follow CST. |
# |
# It took a few years for the dust to settle (I know one story of a town |
# on one time zone having its school in another, such that a mom had to |
# serve her family lunch in two shifts), but presently it seems that only |
# a few towns on the border with Alberta (e.g. Lloydminster) follow MT |
# rules any more; all other districts appear to have used CST year round |
# since sometime in the 1960s. |
|
# From Chris Walton (2006-06-26): |
# The Saskatchewan time act which was last updated in 1996 is about 30 pages |
# long and rather painful to read. |
# http://www.qp.gov.sk.ca/documents/English/Statutes/Statutes/T14.pdf |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Regina 1918 only - Apr 14 2:00 1:00 D |
Rule Regina 1918 only - Oct 27 2:00 0 S |
Rule Regina 1930 1934 - May Sun>=1 0:00 1:00 D |
Rule Regina 1930 1934 - Oct Sun>=1 0:00 0 S |
Rule Regina 1937 1941 - Apr Sun>=8 0:00 1:00 D |
Rule Regina 1937 only - Oct Sun>=8 0:00 0 S |
Rule Regina 1938 only - Oct Sun>=1 0:00 0 S |
Rule Regina 1939 1941 - Oct Sun>=8 0:00 0 S |
Rule Regina 1942 only - Feb 9 2:00 1:00 W # War |
Rule Regina 1945 only - Aug 14 23:00u 1:00 P # Peace |
Rule Regina 1945 only - Sep lastSun 2:00 0 S |
Rule Regina 1946 only - Apr Sun>=8 2:00 1:00 D |
Rule Regina 1946 only - Oct Sun>=8 2:00 0 S |
Rule Regina 1947 1957 - Apr lastSun 2:00 1:00 D |
Rule Regina 1947 1957 - Sep lastSun 2:00 0 S |
Rule Regina 1959 only - Apr lastSun 2:00 1:00 D |
Rule Regina 1959 only - Oct lastSun 2:00 0 S |
# |
Rule Swift 1957 only - Apr lastSun 2:00 1:00 D |
Rule Swift 1957 only - Oct lastSun 2:00 0 S |
Rule Swift 1959 1961 - Apr lastSun 2:00 1:00 D |
Rule Swift 1959 only - Oct lastSun 2:00 0 S |
Rule Swift 1960 1961 - Sep lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Regina -6:58:36 - LMT 1905 Sep |
-7:00 Regina M%sT 1960 Apr lastSun 2:00 |
-6:00 - CST |
Zone America/Swift_Current -7:11:20 - LMT 1905 Sep |
-7:00 Canada M%sT 1946 Apr lastSun 2:00 |
-7:00 Regina M%sT 1950 |
-7:00 Swift M%sT 1972 Apr lastSun 2:00 |
-6:00 - CST |
|
|
# Alberta |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Edm 1918 1919 - Apr Sun>=8 2:00 1:00 D |
Rule Edm 1918 only - Oct 27 2:00 0 S |
Rule Edm 1919 only - May 27 2:00 0 S |
Rule Edm 1920 1923 - Apr lastSun 2:00 1:00 D |
Rule Edm 1920 only - Oct lastSun 2:00 0 S |
Rule Edm 1921 1923 - Sep lastSun 2:00 0 S |
Rule Edm 1942 only - Feb 9 2:00 1:00 W # War |
Rule Edm 1945 only - Aug 14 23:00u 1:00 P # Peace |
Rule Edm 1945 only - Sep lastSun 2:00 0 S |
Rule Edm 1947 only - Apr lastSun 2:00 1:00 D |
Rule Edm 1947 only - Sep lastSun 2:00 0 S |
Rule Edm 1967 only - Apr lastSun 2:00 1:00 D |
Rule Edm 1967 only - Oct lastSun 2:00 0 S |
Rule Edm 1969 only - Apr lastSun 2:00 1:00 D |
Rule Edm 1969 only - Oct lastSun 2:00 0 S |
Rule Edm 1972 1986 - Apr lastSun 2:00 1:00 D |
Rule Edm 1972 2006 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Edmonton -7:33:52 - LMT 1906 Sep |
-7:00 Edm M%sT 1987 |
-7:00 Canada M%sT |
|
|
# British Columbia |
|
# From Paul Eggert (2006-03-22): |
# Shanks & Pottenger write that since 1970 most of this region has |
# been like Vancouver. |
# Dawson Creek uses MST. Much of east BC is like Edmonton. |
# Matthews and Vincent (1998) write that Creston is like Dawson Creek. |
|
# It seems though that (re: Creston) is not entirely correct: |
|
# From Chris Walton (2011-12-01): |
# There are two areas within the Canadian province of British Columbia |
# that do not currently observe daylight saving: |
# a) The Creston Valley (includes the town of Creston and surrounding area) |
# b) The eastern half of the Peace River Regional District |
# (includes the cities of Dawson Creek and Fort St. John) |
|
# Earlier this year I stumbled across a detailed article about the time |
# keeping history of Creston; it was written by Tammy Hardwick who is the |
# manager of the Creston & District Museum. The article was written in May 2009. |
# http://www.ilovecreston.com/?p=articles&t=spec&ar=260 |
# According to the article, Creston has not changed its clocks since June 1918. |
# i.e. Creston has been stuck on UTC-7 for 93 years. |
# Dawson Creek, on the other hand, changed its clocks as recently as April 1972. |
|
# Unfortunately the exact date for the time change in June 1918 remains |
# unknown and will be difficult to ascertain. I e-mailed Tammy a few months |
# ago to ask if Sunday June 2 was a reasonable guess. She said it was just |
# as plausible as any other date (in June). She also said that after writing |
# the article she had discovered another time change in 1916; this is the |
# subject of another article which she wrote in October 2010. |
# http://www.creston.museum.bc.ca/index.php?module=comments&uop=view_comment&cm+id=56 |
|
# Here is a summary of the three clock change events in Creston's history: |
# 1. 1884 or 1885: adoption of Mountain Standard Time (GMT-7) |
# Exact date unknown |
# 2. Oct 1916: switch to Pacific Standard Time (GMT-8) |
# Exact date in October unknown; Sunday October 1 is a reasonable guess. |
# 3. June 1918: switch to Pacific Daylight Time (GMT-7) |
# Exact date in June unknown; Sunday June 2 is a reasonable guess. |
# note 1: |
# On Oct 27/1918 when daylight saving ended in the rest of Canada, |
# Creston did not change its clocks. |
# note 2: |
# During WWII when the Federal Government legislated a mandatory clock change, |
# Creston did not oblige. |
# note 3: |
# There is no guarantee that Creston will remain on Mountain Standard Time |
# (UTC-7) forever. |
# The subject was debated at least once this year by the town Council. |
# http://www.bclocalnews.com/kootenay_rockies/crestonvalleyadvance/news/116760809.html |
|
# During a period WWII, summer time (Daylight saying) was mandatory in Canada. |
# In Creston, that was handled by shifting the area to PST (-8:00) then applying |
# summer time to cause the offset to be -7:00, the same as it had been before |
# the change. It can be argued that the timezone abbreviation during this |
# period should be PDT rather than MST, but that doesn't seem important enough |
# (to anyone) to further complicate the rules. |
|
# The transition dates (and times) are guesses. |
|
# From Matt Johnson (2015-09-21): |
# Fort Nelson, BC, Canada will cancel DST this year. So while previously they |
# were aligned with America/Vancouver, they're now aligned with |
# America/Dawson_Creek. |
# http://www.northernrockies.ca/EN/meta/news/archives/2015/northern-rockies-time-change.html |
# |
# From Tim Parenti (2015-09-23): |
# This requires a new zone for the Northern Rockies Regional Municipality, |
# America/Fort_Nelson. The resolution of 2014-12-08 was reached following a |
# 2014-11-15 poll with nearly 75% support. Effectively, the municipality has |
# been on MST (-0700) like Dawson Creek since it advanced its clocks on |
# 2015-03-08. |
# |
# From Paul Eggert (2015-09-23): |
# Shanks says Fort Nelson did not observe DST in 1946, unlike Vancouver. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Vanc 1918 only - Apr 14 2:00 1:00 D |
Rule Vanc 1918 only - Oct 27 2:00 0 S |
Rule Vanc 1942 only - Feb 9 2:00 1:00 W # War |
Rule Vanc 1945 only - Aug 14 23:00u 1:00 P # Peace |
Rule Vanc 1945 only - Sep 30 2:00 0 S |
Rule Vanc 1946 1986 - Apr lastSun 2:00 1:00 D |
Rule Vanc 1946 only - Oct 13 2:00 0 S |
Rule Vanc 1947 1961 - Sep lastSun 2:00 0 S |
Rule Vanc 1962 2006 - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Vancouver -8:12:28 - LMT 1884 |
-8:00 Vanc P%sT 1987 |
-8:00 Canada P%sT |
Zone America/Dawson_Creek -8:00:56 - LMT 1884 |
-8:00 Canada P%sT 1947 |
-8:00 Vanc P%sT 1972 Aug 30 2:00 |
-7:00 - MST |
Zone America/Fort_Nelson -8:10:47 - LMT 1884 |
-8:00 Vanc P%sT 1946 |
-8:00 - PST 1947 |
-8:00 Vanc P%sT 1987 |
-8:00 Canada P%sT 2015 Mar 8 2:00 |
-7:00 - MST |
Zone America/Creston -7:46:04 - LMT 1884 |
-7:00 - MST 1916 Oct 1 |
-8:00 - PST 1918 Jun 2 |
-7:00 - MST |
|
# Northwest Territories, Nunavut, Yukon |
|
# From Paul Eggert (2006-03-22): |
# Dawson switched to PST in 1973. Inuvik switched to MST in 1979. |
# Mathew Englander (1996-10-07) gives the following refs: |
# * 1967. Paragraph 28(34)(g) of the Interpretation Act, S.C. 1967-68, |
# c. 7 defines Yukon standard time as UTC-9.... |
# see Interpretation Act, R.S.C. 1985, c. I-21, s. 35(1). |
# [http://canlii.ca/t/7vhg] |
# * C.O. 1973/214 switched Yukon to PST on 1973-10-28 00:00. |
# * O.I.C. 1980/02 established DST. |
# * O.I.C. 1987/056 changed DST to Apr firstSun 2:00 to Oct lastSun 2:00. |
|
# From Brian Inglis (2015-04-14): |
# |
# I tried to trace the history of Yukon time and found the following |
# regulations, giving the reference title and URL if found, regulation name, |
# and relevant quote if available. Each regulation specifically revokes its |
# predecessor. The final reference is to the current Interpretation Act |
# authorizing and resulting from these regulatory changes. |
# |
# Only recent regulations were retrievable via Yukon government site search or |
# index, and only some via Canadian legal sources. Other sources used include |
# articles titled "Standard Time and Time Zones in Canada" from JRASC via ADS |
# Abstracts, cited by ADO for 1932 ..., and updated versions from 1958 and |
# 1970 quoted below; each article includes current extracts from provincial |
# and territorial ST and DST regulations at the end, summaries and details of |
# standard times and daylight saving time at many locations across Canada, |
# with time zone maps, tables and calculations for Canadian Sunrise, Sunset, |
# and LMST; they also cover many countries and global locations, with a chart |
# and table showing current Universal Time offsets, and may be useful as |
# another source of information for 1970 and earlier. |
# |
# * Standard Time and Time Zones in Canada; Smith, C.C.; JRASC, Vol. 26, |
# pp.49-77; February 1932; SAO/NASA Astrophysics Data System (ADS) |
# http://adsabs.harvard.edu/abs/1932JRASC..26...49S from p.75: |
# Yukon Interpretation Ordinance |
# Yukon standard time is the local mean time at the one hundred and |
# thirty-fifth meridian. |
# |
# * Standard Time and Time Zones in Canada; Smith, C.C.; Thomson, Malcolm M.; |
# JRASC, Vol. 52, pp.193-223; October 1958; SAO/NASA Astrophysics Data System |
# (ADS) http://adsabs.harvard.edu/abs/1958JRASC..52..193S from pp.220-1: |
# Yukon Interpretation Ordinance, 1955, Chap. 16. |
# |
# (1) Subject to this section, standard time shall be reckoned as nine |
# hours behind Greenwich Time and called Yukon Standard Time. |
# |
# (2) Notwithstanding subsection (1), the Commissioner may make regulations |
# varying the manner of reckoning standard time. |
# |
# * Yukon Territory Commissioner's Order 1966-20 Interpretation Ordinance |
# http://? - no online source found |
# |
# * Standard Time and Time Zones in Canada; Thomson, Malcolm M.; JRASC, |
# Vol. 64, pp.129-162; June 1970; SAO/NASA Astrophysics Data System (ADS) |
# http://adsabs.harvard.edu/abs/1970JRASC..64..129T from p.156: Yukon |
# Territory Commissioner's Order 1967-59 Interpretation Ordinance ... |
# |
# 1. Commissioner's Order 1966-20 dated at Whitehorse in the Yukon |
# Territory on 27th January, 1966, is hereby revoked. |
# |
# 2. Yukon (East) Standard Time as defined by section 36 of the |
# Interpretation Ordinance from and after mid-night on the 28th day of May, |
# 1967 shall be reckoned in the same manner as Pacific Standard Time, that |
# is to say, eight hours behind Greenwich Time in the area of the Yukon |
# Territory lying east of the 138th degree longitude west. |
# |
# 3. In the remainder of the Territory, lying west of the 138th degree |
# longitude west, Yukon (West) Standard Time shall be reckoned as nine |
# hours behind Greenwich Time. |
# |
# * Yukon Standard Time defined as Pacific Standard Time, YCO 1973/214 |
# http://www.canlii.org/en/yk/laws/regu/yco-1973-214/latest/yco-1973-214.html |
# C.O. 1973/214 INTERPRETATION ACT ... |
# |
# 1. Effective October 28, 1973 Commissioner's Order 1967/59 is hereby |
# revoked. |
# |
# 2. Yukon Standard Time as defined by section 36 of the Interpretation |
# Act from and after midnight on the twenty-eighth day of October, 1973 |
# shall be reckoned in the same manner as Pacific Standard Time, that is |
# to say eight hours behind Greenwich Time. |
# |
# * O.I.C. 1980/02 INTERPRETATION ACT |
# http://? - no online source found |
# |
# * Yukon Daylight Saving Time, YOIC 1987/56 |
# http://www.canlii.org/en/yk/laws/regu/yoic-1987-56/latest/yoic-1987-56.html |
# O.I.C. 1987/056 INTERPRETATION ACT ... |
# |
# In every year between |
# (a) two o'clock in the morning in the first Sunday in April, and |
# (b) two o'clock in the morning in the last Sunday in October, |
# Standard Time shall be reckoned as seven hours behind Greenwich Time and |
# called Yukon Daylight Saving Time. |
# ... |
# Dated ... 9th day of March, A.D., 1987. |
# |
# * Yukon Daylight Saving Time 2006, YOIC 2006/127 |
# http://www.canlii.org/en/yk/laws/regu/yoic-2006-127/latest/yoic-2006-127.html |
# O.I.C. 2006/127 INTERPRETATION ACT ... |
# |
# 1. In Yukon each year the time for general purposes shall be 7 hours |
# behind Greenwich mean time during the period commencing at two o'clock |
# in the forenoon on the second Sunday of March and ending at two o'clock |
# in the forenoon on the first Sunday of November and shall be called |
# Yukon Daylight Saving Time. |
# |
# 2. Order-in-Council 1987/56 is revoked. |
# |
# 3. This order comes into force January 1, 2007. |
# |
# * Interpretation Act, RSY 2002, c 125 |
# http://www.canlii.org/en/yk/laws/stat/rsy-2002-c-125/latest/rsy-2002-c-125.html |
|
# From Rives McDow (1999-09-04): |
# Nunavut ... moved ... to incorporate the whole territory into one time zone. |
# Nunavut moves to single time zone Oct. 31 |
# http://www.nunatsiaq.com/nunavut/nvt90903_13.html |
# |
# From Antoine Leca (1999-09-06): |
# We then need to create a new timezone for the Kitikmeot region of Nunavut |
# to differentiate it from the Yellowknife region. |
|
# From Paul Eggert (1999-09-20): |
# Basic Facts: The New Territory |
# http://www.nunavut.com/basicfacts/english/basicfacts_1territory.html |
# (1999) reports that Pangnirtung operates on eastern time, |
# and that Coral Harbour does not observe DST. We don't know when |
# Pangnirtung switched to eastern time; we'll guess 1995. |
|
# From Rives McDow (1999-11-08): |
# On October 31, when the rest of Nunavut went to Central time, |
# Pangnirtung wobbled. Here is the result of their wobble: |
# |
# The following businesses and organizations in Pangnirtung use Central Time: |
# |
# First Air, Power Corp, Nunavut Construction, Health Center, RCMP, |
# Eastern Arctic National Parks, A & D Specialist |
# |
# The following businesses and organizations in Pangnirtung use Eastern Time: |
# |
# Hamlet office, All other businesses, Both schools, Airport operator |
# |
# This has made for an interesting situation there, which warranted the news. |
# No one there that I spoke with seems concerned, or has plans to |
# change the local methods of keeping time, as it evidently does not |
# really interfere with any activities or make things difficult locally. |
# They plan to celebrate New Year's turn-over twice, one hour apart, |
# so it appears that the situation will last at least that long. |
# The Nunavut Intergovernmental Affairs hopes that they will "come to |
# their senses", but the locals evidently don't see any problem with |
# the current state of affairs. |
|
# From Michaela Rodrigue, writing in the |
# Nunatsiaq News (1999-11-19): |
# http://www.nunatsiaq.com/archives/nunavut991130/nvt91119_17.html |
# Clyde River, Pangnirtung and Sanikiluaq now operate with two time zones, |
# central - or Nunavut time - for government offices, and eastern time |
# for municipal offices and schools.... Igloolik [was similar but then] |
# made the switch to central time on Saturday, Nov. 6. |
|
# From Paul Eggert (2000-10-02): |
# Matthews and Vincent (1998) say the following, but we lack histories |
# for these potential new Zones. |
# |
# The Canadian Forces station at Alert uses Eastern Time while the |
# handful of residents at the Eureka weather station [in the Central |
# zone] skip daylight savings. Baffin Island, which is crossed by the |
# Central, Eastern and Atlantic Time zones only uses Eastern Time. |
# Gjoa Haven, Taloyoak and Pelly Bay all use Mountain instead of |
# Central Time and Southampton Island [in the Central zone] is not |
# required to use daylight savings. |
|
# From <http://www.nunatsiaq.com/archives/nunavut001130/nvt21110_02.html> |
# Nunavut now has two time zones (2000-11-10): |
# The Nunavut government would allow its employees in Kugluktuk and |
# Cambridge Bay to operate on central time year-round, putting them |
# one hour behind the rest of Nunavut for six months during the winter. |
# At the end of October the two communities had rebelled against |
# Nunavut's unified time zone, refusing to shift to eastern time with |
# the rest of the territory for the winter. Cambridge Bay remained on |
# central time, while Kugluktuk, even farther west, reverted to |
# mountain time, which they had used before the advent of Nunavut's |
# unified time zone in 1999. |
# |
# From Rives McDow (2001-01-20), quoting the Nunavut government: |
# The preceding decision came into effect at midnight, Saturday Nov 4, 2000. |
|
# From Paul Eggert (2000-12-04): |
# Let's just keep track of the official times for now. |
|
# From Rives McDow (2001-03-07): |
# The premier of Nunavut has issued a ministerial statement advising |
# that effective 2001-04-01, the territory of Nunavut will revert |
# back to three time zones (mountain, central, and eastern). Of the |
# cities in Nunavut, Coral Harbor is the only one that I know of that |
# has said it will not observe dst, staying on EST year round. I'm |
# checking for more info, and will get back to you if I come up with |
# more. |
# [Also see <http://www.nunatsiaq.com/nunavut/nvt10309_06.html> (2001-03-09).] |
|
# From Gwillim Law (2005-05-21): |
# According to ... |
# http://www.canadiangeographic.ca/Magazine/SO98/geomap.asp |
# (from a 1998 Canadian Geographic article), the de facto and de jure time |
# for Southampton Island (at the north end of Hudson Bay) is UTC-5 all year |
# round. Using Google, it's easy to find other websites that confirm this. |
# I wasn't able to find how far back this time regimen goes, but since it |
# predates the creation of Nunavut, it probably goes back many years.... |
# The Inuktitut name of Coral Harbour is Sallit, but it's rarely used. |
# |
# From Paul Eggert (2014-10-17): |
# For lack of better information, assume that Southampton Island observed |
# daylight saving only during wartime. Gwillim Law's email also |
# mentioned maps now maintained by National Research Council Canada; |
# see above for an up-to-date link. |
|
# From Chris Walton (2007-03-01): |
# ... the community of Resolute (located on Cornwallis Island in |
# Nunavut) moved from Central Time to Eastern Time last November. |
# Basically the community did not change its clocks at the end of |
# daylight saving.... |
# http://www.nnsl.com/frames/newspapers/2006-11/nov13_06none.html |
|
# From Chris Walton (2011-03-21): |
# Back in 2007 I initiated the creation of a new "zone file" for Resolute |
# Bay. Resolute Bay is a small community located about 900km north of |
# the Arctic Circle. The zone file was required because Resolute Bay had |
# decided to use UTC-5 instead of UTC-6 for the winter of 2006-2007. |
# |
# According to new information which I received last week, Resolute Bay |
# went back to using UTC-6 in the winter of 2007-2008... |
# |
# On March 11/2007 most of Canada went onto daylight saving. On March |
# 14/2007 I phoned the Resolute Bay hamlet office to do a "time check." I |
# talked to somebody that was both knowledgeable and helpful. I was able |
# to confirm that Resolute Bay was still operating on UTC-5. It was |
# explained to me that Resolute Bay had been on the Eastern Time zone |
# (EST) in the winter, and was now back on the Central Time zone (CDT). |
# i.e. the time zone had changed twice in the last year but the clocks |
# had not moved. The residents had to know which time zone they were in |
# so they could follow the correct TV schedule... |
# |
# On Nov 02/2008 most of Canada went onto standard time. On Nov 03/2008 I |
# phoned the Resolute Bay hamlet office...[D]ue to the challenging nature |
# of the phone call, I decided to seek out an alternate source of |
# information. I found an e-mail address for somebody by the name of |
# Stephanie Adams whose job was listed as "Inns North Support Officer for |
# Arctic Co-operatives." I was under the impression that Stephanie lived |
# and worked in Resolute Bay... |
# |
# On March 14/2011 I phoned the hamlet office again. I was told that |
# Resolute Bay had been using Central Standard Time over the winter of |
# 2010-2011 and that the clocks had therefore been moved one hour ahead |
# on March 13/2011. The person I talked to was aware that Resolute Bay |
# had previously experimented with Eastern Standard Time but he could not |
# tell me when the practice had stopped. |
# |
# On March 17/2011 I searched the Web to find an e-mail address of |
# somebody that might be able to tell me exactly when Resolute Bay went |
# off Eastern Standard Time. I stumbled on the name "Aziz Kheraj." Aziz |
# used to be the mayor of Resolute Bay and he apparently owns half the |
# businesses including "South Camp Inn." This website has some info on |
# Aziz: |
# http://www.uphere.ca/node/493 |
# |
# I sent Aziz an e-mail asking when Resolute Bay had stopped using |
# Eastern Standard Time. |
# |
# Aziz responded quickly with this: "hi, The time was not changed for the |
# 1 year only, the following year, the community went back to the old way |
# of "spring ahead-fall behind" currently we are zulu plus 5 hrs and in |
# the winter Zulu plus 6 hrs" |
# |
# This of course conflicted with everything I had ascertained in November 2008. |
# |
# I sent Aziz a copy of my 2008 e-mail exchange with Stephanie. Aziz |
# responded with this: "Hi, Stephanie lives in Winnipeg. I live here, You |
# may want to check with the weather office in Resolute Bay or do a |
# search on the weather through Env. Canada. web site" |
# |
# If I had realized the Stephanie did not live in Resolute Bay I would |
# never have contacted her. I now believe that all the information I |
# obtained in November 2008 should be ignored... |
# I apologize for reporting incorrect information in 2008. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule NT_YK 1918 only - Apr 14 2:00 1:00 D |
Rule NT_YK 1918 only - Oct 27 2:00 0 S |
Rule NT_YK 1919 only - May 25 2:00 1:00 D |
Rule NT_YK 1919 only - Nov 1 0:00 0 S |
Rule NT_YK 1942 only - Feb 9 2:00 1:00 W # War |
Rule NT_YK 1945 only - Aug 14 23:00u 1:00 P # Peace |
Rule NT_YK 1945 only - Sep 30 2:00 0 S |
Rule NT_YK 1965 only - Apr lastSun 0:00 2:00 DD |
Rule NT_YK 1965 only - Oct lastSun 2:00 0 S |
Rule NT_YK 1980 1986 - Apr lastSun 2:00 1:00 D |
Rule NT_YK 1980 2006 - Oct lastSun 2:00 0 S |
Rule NT_YK 1987 2006 - Apr Sun>=1 2:00 1:00 D |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
# aka Panniqtuuq |
Zone America/Pangnirtung 0 - zzz 1921 # trading post est. |
-4:00 NT_YK A%sT 1995 Apr Sun>=1 2:00 |
-5:00 Canada E%sT 1999 Oct 31 2:00 |
-6:00 Canada C%sT 2000 Oct 29 2:00 |
-5:00 Canada E%sT |
# formerly Frobisher Bay |
Zone America/Iqaluit 0 - zzz 1942 Aug # Frobisher Bay est. |
-5:00 NT_YK E%sT 1999 Oct 31 2:00 |
-6:00 Canada C%sT 2000 Oct 29 2:00 |
-5:00 Canada E%sT |
# aka Qausuittuq |
Zone America/Resolute 0 - zzz 1947 Aug 31 # Resolute founded |
-6:00 NT_YK C%sT 2000 Oct 29 2:00 |
-5:00 - EST 2001 Apr 1 3:00 |
-6:00 Canada C%sT 2006 Oct 29 2:00 |
-5:00 - EST 2007 Mar 11 3:00 |
-6:00 Canada C%sT |
# aka Kangiqiniq |
Zone America/Rankin_Inlet 0 - zzz 1957 # Rankin Inlet founded |
-6:00 NT_YK C%sT 2000 Oct 29 2:00 |
-5:00 - EST 2001 Apr 1 3:00 |
-6:00 Canada C%sT |
# aka Iqaluktuuttiaq |
Zone America/Cambridge_Bay 0 - zzz 1920 # trading post est.? |
-7:00 NT_YK M%sT 1999 Oct 31 2:00 |
-6:00 Canada C%sT 2000 Oct 29 2:00 |
-5:00 - EST 2000 Nov 5 0:00 |
-6:00 - CST 2001 Apr 1 3:00 |
-7:00 Canada M%sT |
Zone America/Yellowknife 0 - zzz 1935 # Yellowknife founded? |
-7:00 NT_YK M%sT 1980 |
-7:00 Canada M%sT |
Zone America/Inuvik 0 - zzz 1953 # Inuvik founded |
-8:00 NT_YK P%sT 1979 Apr lastSun 2:00 |
-7:00 NT_YK M%sT 1980 |
-7:00 Canada M%sT |
Zone America/Whitehorse -9:00:12 - LMT 1900 Aug 20 |
-9:00 NT_YK Y%sT 1967 May 28 0:00 |
-8:00 NT_YK P%sT 1980 |
-8:00 Canada P%sT |
Zone America/Dawson -9:17:40 - LMT 1900 Aug 20 |
-9:00 NT_YK Y%sT 1973 Oct 28 0:00 |
-8:00 NT_YK P%sT 1980 |
-8:00 Canada P%sT |
|
|
############################################################################### |
|
# Mexico |
|
# From Paul Eggert (2014-12-07): |
# The Investigation and Analysis Service of the |
# Mexican Library of Congress (MLoC) has published a |
# history of Mexican local time (in Spanish) |
# http://www.diputados.gob.mx/bibliot/publica/inveyana/polisoc/horver/index.htm |
# |
# Here are the discrepancies between Shanks & Pottenger (S&P) and the MLoC. |
# (In all cases we go with the MLoC.) |
# S&P report that Baja was at -8:00 in 1922/1923. |
# S&P say the 1930 transition in Baja was 1930-11-16. |
# S&P report no DST during summer 1931. |
# S&P report a transition at 1932-03-30 23:00, not 1932-04-01. |
|
# From Gwillim Law (2001-02-20): |
# There are some other discrepancies between the Decrees page and the |
# tz database. I think they can best be explained by supposing that |
# the researchers who prepared the Decrees page failed to find some of |
# the relevant documents. |
|
# From Alan Perry (1996-02-15): |
# A guy from our Mexico subsidiary finally found the Presidential Decree |
# outlining the timezone changes in Mexico. |
# |
# ------------- Begin Forwarded Message ------------- |
# |
# I finally got my hands on the Official Presidential Decree that sets up the |
# rules for the DST changes. The rules are: |
# |
# 1. The country is divided in 3 timezones: |
# - Baja California Norte (the Mexico/BajaNorte TZ) |
# - Baja California Sur, Nayarit, Sinaloa and Sonora (the Mexico/BajaSur TZ) |
# - The rest of the country (the Mexico/General TZ) |
# |
# 2. From the first Sunday in April at 2:00 AM to the last Sunday in October |
# at 2:00 AM, the times in each zone are as follows: |
# BajaNorte: GMT+7 |
# BajaSur: GMT+6 |
# General: GMT+5 |
# |
# 3. The rest of the year, the times are as follows: |
# BajaNorte: GMT+8 |
# BajaSur: GMT+7 |
# General: GMT+6 |
# |
# The Decree was published in Mexico's Official Newspaper on January 4th. |
# |
# -------------- End Forwarded Message -------------- |
# From Paul Eggert (1996-06-12): |
# For an English translation of the decree, see |
# "Diario Oficial: Time Zone Changeover" (1996-01-04). |
# http://mexico-travel.com/extra/timezone_eng.html |
|
# From Rives McDow (1998-10-08): |
# The State of Quintana Roo has reverted back to central STD and DST times |
# (i.e. UTC -0600 and -0500 as of 1998-08-02). |
|
# From Rives McDow (2000-01-10): |
# Effective April 4, 1999 at 2:00 AM local time, Sonora changed to the time |
# zone 5 hours from the International Date Line, and will not observe daylight |
# savings time so as to stay on the same time zone as the southern part of |
# Arizona year round. |
|
# From Jesper Nørgaard, translating |
# <http://www.reforma.com/nacional/articulo/064327/> (2001-01-17): |
# In Oaxaca, the 55.000 teachers from the Section 22 of the National |
# Syndicate of Education Workers, refuse to apply daylight saving each |
# year, so that the more than 10,000 schools work at normal hour the |
# whole year. |
|
# From Gwillim Law (2001-01-19): |
# <http://www.reforma.com/negocios_y_dinero/articulo/064481/> ... says |
# (translated):... |
# January 17, 2000 - The Energy Secretary, Ernesto Martens, announced |
# that Summer Time will be reduced from seven to five months, starting |
# this year.... |
# http://www.publico.com.mx/scripts/texto3.asp?action=pagina&pag=21&pos=p&secc=naci&date=01/17/2001 |
# [translated], says "summer time will ... take effect on the first Sunday |
# in May, and end on the last Sunday of September. |
|
# From Arthur David Olson (2001-01-25): |
# The 2001-01-24 traditional Washington Post contained the page one |
# story "Timely Issue Divides Mexicans."... |
# http://www.washingtonpost.com/wp-dyn/articles/A37383-2001Jan23.html |
# ... Mexico City Mayor López Obrador "...is threatening to keep |
# Mexico City and its 20 million residents on a different time than |
# the rest of the country..." In particular, López Obrador would abolish |
# observation of Daylight Saving Time. |
|
# Official statute published by the Energy Department |
# http://www.conae.gob.mx/ahorro/decretohorver2001.html#decre |
# (2001-02-01) shows Baja and Chihauhua as still using US DST rules, |
# and Sonora with no DST. This was reported by Jesper Nørgaard (2001-02-03). |
|
# From Paul Eggert (2001-03-03): |
# |
# http://www.latimes.com/news/nation/20010303/t000018766.html |
# James F. Smith writes in today's LA Times |
# * Sonora will continue to observe standard time. |
# * Last week Mexico City's mayor Andrés Manuel López Obrador decreed that |
# the Federal District will not adopt DST. |
# * 4 of 16 district leaders announced they'll ignore the decree. |
# * The decree does not affect federal-controlled facilities including |
# the airport, banks, hospitals, and schools. |
# |
# For now we'll assume that the Federal District will bow to federal rules. |
|
# From Jesper Nørgaard (2001-04-01): |
# I found some references to the Mexican application of daylight |
# saving, which modifies what I had already sent you, stating earlier |
# that a number of northern Mexican states would go on daylight |
# saving. The modification reverts this to only cover Baja California |
# (Norte), while all other states (except Sonora, who has no daylight |
# saving all year) will follow the original decree of president |
# Vicente Fox, starting daylight saving May 6, 2001 and ending |
# September 30, 2001. |
# References: "Diario de Monterrey" <http://www.diariodemonterrey.com/index.asp> |
# Palabra <http://palabra.infosel.com/010331/primera/ppri3101.pdf> (2001-03-31) |
|
# From Reuters (2001-09-04): |
# Mexico's Supreme Court on Tuesday declared that daylight savings was |
# unconstitutional in Mexico City, creating the possibility the |
# capital will be in a different time zone from the rest of the nation |
# next year.... The Supreme Court's ruling takes effect at 2:00 |
# a.m. (0800 GMT) on Sept. 30, when Mexico is scheduled to revert to |
# standard time. "This is so residents of the Federal District are not |
# subject to unexpected time changes," a statement from the court said. |
|
# From Jesper Nørgaard Welen (2002-03-12): |
# ... consulting my local grocery store(!) and my coworkers, they all insisted |
# that a new decision had been made to reinstate US style DST in Mexico.... |
# http://www.conae.gob.mx/ahorro/horaver2001_m1_2002.html (2002-02-20) |
# confirms this. Sonora as usual is the only state where DST is not applied. |
|
# From Steffen Thorsen (2009-12-28): |
# |
# Steffen Thorsen wrote: |
# > Mexico's House of Representatives has approved a proposal for northern |
# > Mexico's border cities to share the same daylight saving schedule as |
# > the United States. |
# Now this has passed both the Congress and the Senate, so starting from |
# 2010, some border regions will be the same: |
# http://www.signonsandiego.com/news/2009/dec/28/clocks-will-match-both-sides-border/ |
# http://www.elmananarey.com/diario/noticia/nacional/noticias/empatan_horario_de_frontera_con_eu/621939 |
# (Spanish) |
# |
# Could not find the new law text, but the proposed law text changes are here: |
# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/20091210-V.pdf |
# (Gaceta Parlamentaria) |
# |
# There is also a list of the votes here: |
# http://gaceta.diputados.gob.mx/Gaceta/61/2009/dic/V2-101209.html |
# |
# Our page: |
# http://www.timeanddate.com/news/time/north-mexico-dst-change.html |
|
# From Arthur David Olson (2010-01-20): |
# The page |
# http://dof.gob.mx/nota_detalle.php?codigo=5127480&fecha=06/01/2010 |
# includes this text: |
# En los municipios fronterizos de Tijuana y Mexicali en Baja California; |
# Juárez y Ojinaga en Chihuahua; Acuña y Piedras Negras en Coahuila; |
# Anáhuac en Nuevo León; y Nuevo Laredo, Reynosa y Matamoros en |
# Tamaulipas, la aplicación de este horario estacional surtirá efecto |
# desde las dos horas del segundo domingo de marzo y concluirá a las dos |
# horas del primer domingo de noviembre. |
# En los municipios fronterizos que se encuentren ubicados en la franja |
# fronteriza norte en el territorio comprendido entre la línea |
# internacional y la línea paralela ubicada a una distancia de veinte |
# kilómetros, así como la Ciudad de Ensenada, Baja California, hacia el |
# interior del país, la aplicación de este horario estacional surtirá |
# efecto desde las dos horas del segundo domingo de marzo y concluirá a |
# las dos horas del primer domingo de noviembre. |
|
# From Steffen Thorsen (2014-12-08), translated by Gwillim Law: |
# The Mexican state of Quintana Roo will likely change to EST in 2015. |
# |
# http://www.unioncancun.mx/articulo/2014/12/04/medio-ambiente/congreso-aprueba-una-hora-mas-de-sol-en-qroo |
# "With this change, the time conflict that has existed between the municipios |
# of Quintana Roo and the municipio of Felipe Carrillo Puerto may come to an |
# end. The latter declared itself in rebellion 15 years ago when a time change |
# was initiated in Mexico, and since then it has refused to change its time |
# zone along with the rest of the country." |
# |
# From Steffen Thorsen (2015-01-14), translated by Gwillim Law: |
# http://sipse.com/novedades/confirman-aplicacion-de-nueva-zona-horaria-para-quintana-roo-132331.html |
# "...the new time zone will come into effect at two o'clock on the first Sunday |
# of February, when we will have to advance the clock one hour from its current |
# time..." |
# Also, the new zone will not use DST. |
# |
# From Carlos Raúl Perasso (2015-02-02): |
# The decree that modifies the Mexican Hour System Law has finally |
# been published at the Diario Oficial de la Federación |
# http://www.dof.gob.mx/nota_detalle.php?codigo=5380123&fecha=31/01/2015 |
# It establishes 5 zones for Mexico: |
# 1- Zona Centro (Central Zone): Corresponds to longitude 90 W, |
# includes most of Mexico, excluding what's mentioned below. |
# 2- Zona Pacífico (Pacific Zone): Longitude 105 W, includes the |
# states of Baja California Sur; Chihuahua; Nayarit (excluding Bahía |
# de Banderas which lies in Central Zone); Sinaloa and Sonora. |
# 3- Zona Noroeste (Northwest Zone): Longitude 120 W, includes the |
# state of Baja California. |
# 4- Zona Sureste (Southeast Zone): Longitude 75 W, includes the state |
# of Quintana Roo. |
# 5- The islands, reefs and keys shall take their timezone from the |
# longitude they are located at. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Mexico 1939 only - Feb 5 0:00 1:00 D |
Rule Mexico 1939 only - Jun 25 0:00 0 S |
Rule Mexico 1940 only - Dec 9 0:00 1:00 D |
Rule Mexico 1941 only - Apr 1 0:00 0 S |
Rule Mexico 1943 only - Dec 16 0:00 1:00 W # War |
Rule Mexico 1944 only - May 1 0:00 0 S |
Rule Mexico 1950 only - Feb 12 0:00 1:00 D |
Rule Mexico 1950 only - Jul 30 0:00 0 S |
Rule Mexico 1996 2000 - Apr Sun>=1 2:00 1:00 D |
Rule Mexico 1996 2000 - Oct lastSun 2:00 0 S |
Rule Mexico 2001 only - May Sun>=1 2:00 1:00 D |
Rule Mexico 2001 only - Sep lastSun 2:00 0 S |
Rule Mexico 2002 max - Apr Sun>=1 2:00 1:00 D |
Rule Mexico 2002 max - Oct lastSun 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
# Quintana Roo; represented by Cancún |
Zone America/Cancun -5:47:04 - LMT 1922 Jan 1 0:12:56 |
-6:00 - CST 1981 Dec 23 |
-5:00 Mexico E%sT 1998 Aug 2 2:00 |
-6:00 Mexico C%sT 2015 Feb 1 2:00 |
-5:00 - EST |
# Campeche, Yucatán; represented by Mérida |
Zone America/Merida -5:58:28 - LMT 1922 Jan 1 0:01:32 |
-6:00 - CST 1981 Dec 23 |
-5:00 - EST 1982 Dec 2 |
-6:00 Mexico C%sT |
# Coahuila, Durango, Nuevo León, Tamaulipas (near US border) |
Zone America/Matamoros -6:40:00 - LMT 1921 Dec 31 23:20:00 |
-6:00 - CST 1988 |
-6:00 US C%sT 1989 |
-6:00 Mexico C%sT 2010 |
-6:00 US C%sT |
# Coahuila, Durango, Nuevo León, Tamaulipas (away from US border) |
Zone America/Monterrey -6:41:16 - LMT 1921 Dec 31 23:18:44 |
-6:00 - CST 1988 |
-6:00 US C%sT 1989 |
-6:00 Mexico C%sT |
# Central Mexico |
Zone America/Mexico_City -6:36:36 - LMT 1922 Jan 1 0:23:24 |
-7:00 - MST 1927 Jun 10 23:00 |
-6:00 - CST 1930 Nov 15 |
-7:00 - MST 1931 May 1 23:00 |
-6:00 - CST 1931 Oct |
-7:00 - MST 1932 Apr 1 |
-6:00 Mexico C%sT 2001 Sep 30 2:00 |
-6:00 - CST 2002 Feb 20 |
-6:00 Mexico C%sT |
# Chihuahua (near US border) |
Zone America/Ojinaga -6:57:40 - LMT 1922 Jan 1 0:02:20 |
-7:00 - MST 1927 Jun 10 23:00 |
-6:00 - CST 1930 Nov 15 |
-7:00 - MST 1931 May 1 23:00 |
-6:00 - CST 1931 Oct |
-7:00 - MST 1932 Apr 1 |
-6:00 - CST 1996 |
-6:00 Mexico C%sT 1998 |
-6:00 - CST 1998 Apr Sun>=1 3:00 |
-7:00 Mexico M%sT 2010 |
-7:00 US M%sT |
# Chihuahua (away from US border) |
Zone America/Chihuahua -7:04:20 - LMT 1921 Dec 31 23:55:40 |
-7:00 - MST 1927 Jun 10 23:00 |
-6:00 - CST 1930 Nov 15 |
-7:00 - MST 1931 May 1 23:00 |
-6:00 - CST 1931 Oct |
-7:00 - MST 1932 Apr 1 |
-6:00 - CST 1996 |
-6:00 Mexico C%sT 1998 |
-6:00 - CST 1998 Apr Sun>=1 3:00 |
-7:00 Mexico M%sT |
# Sonora |
Zone America/Hermosillo -7:23:52 - LMT 1921 Dec 31 23:36:08 |
-7:00 - MST 1927 Jun 10 23:00 |
-6:00 - CST 1930 Nov 15 |
-7:00 - MST 1931 May 1 23:00 |
-6:00 - CST 1931 Oct |
-7:00 - MST 1932 Apr 1 |
-6:00 - CST 1942 Apr 24 |
-7:00 - MST 1949 Jan 14 |
-8:00 - PST 1970 |
-7:00 Mexico M%sT 1999 |
-7:00 - MST |
|
# From Alexander Krivenyshev (2010-04-21): |
# According to news, Bahía de Banderas (Mexican state of Nayarit) |
# changed time zone UTC-7 to new time zone UTC-6 on April 4, 2010 (to |
# share the same time zone as nearby city Puerto Vallarta, Jalisco). |
# |
# (Spanish) |
# Bahía de Banderas homologa su horario al del centro del |
# país, a partir de este domingo |
# http://www.nayarit.gob.mx/notes.asp?id=20748 |
# |
# Bahía de Banderas homologa su horario con el del Centro del |
# País |
# http://www.bahiadebanderas.gob.mx/principal/index.php?option=com_content&view=article&id=261:bahia-de-banderas-homologa-su-horario-con-el-del-centro-del-pais&catid=42:comunicacion-social&Itemid=50 |
# |
# (English) |
# Puerto Vallarta and Bahía de Banderas: One Time Zone |
# http://virtualvallarta.com/puertovallarta/puertovallarta/localnews/2009-12-03-Puerto-Vallarta-and-Bahia-de-Banderas-One-Time-Zone.shtml |
# http://www.worldtimezone.com/dst_news/dst_news_mexico08.html |
# |
# "Mexico's Senate approved the amendments to the Mexican Schedule System that |
# will allow Bahía de Banderas and Puerto Vallarta to share the same time |
# zone ..." |
# Baja California Sur, Nayarit, Sinaloa |
|
# From Arthur David Olson (2010-05-01): |
# Use "Bahia_Banderas" to keep the name to fourteen characters. |
|
# Mazatlán |
Zone America/Mazatlan -7:05:40 - LMT 1921 Dec 31 23:54:20 |
-7:00 - MST 1927 Jun 10 23:00 |
-6:00 - CST 1930 Nov 15 |
-7:00 - MST 1931 May 1 23:00 |
-6:00 - CST 1931 Oct |
-7:00 - MST 1932 Apr 1 |
-6:00 - CST 1942 Apr 24 |
-7:00 - MST 1949 Jan 14 |
-8:00 - PST 1970 |
-7:00 Mexico M%sT |
|
# Bahía de Banderas |
Zone America/Bahia_Banderas -7:01:00 - LMT 1921 Dec 31 23:59:00 |
-7:00 - MST 1927 Jun 10 23:00 |
-6:00 - CST 1930 Nov 15 |
-7:00 - MST 1931 May 1 23:00 |
-6:00 - CST 1931 Oct |
-7:00 - MST 1932 Apr 1 |
-6:00 - CST 1942 Apr 24 |
-7:00 - MST 1949 Jan 14 |
-8:00 - PST 1970 |
-7:00 Mexico M%sT 2010 Apr 4 2:00 |
-6:00 Mexico C%sT |
|
# Baja California (near US border) |
Zone America/Tijuana -7:48:04 - LMT 1922 Jan 1 0:11:56 |
-7:00 - MST 1924 |
-8:00 - PST 1927 Jun 10 23:00 |
-7:00 - MST 1930 Nov 15 |
-8:00 - PST 1931 Apr 1 |
-8:00 1:00 PDT 1931 Sep 30 |
-8:00 - PST 1942 Apr 24 |
-8:00 1:00 PWT 1945 Aug 14 23:00u |
-8:00 1:00 PPT 1945 Nov 12 # Peace |
-8:00 - PST 1948 Apr 5 |
-8:00 1:00 PDT 1949 Jan 14 |
-8:00 - PST 1954 |
-8:00 CA P%sT 1961 |
-8:00 - PST 1976 |
-8:00 US P%sT 1996 |
-8:00 Mexico P%sT 2001 |
-8:00 US P%sT 2002 Feb 20 |
-8:00 Mexico P%sT 2010 |
-8:00 US P%sT |
# Baja California (away from US border) |
Zone America/Santa_Isabel -7:39:28 - LMT 1922 Jan 1 0:20:32 |
-7:00 - MST 1924 |
-8:00 - PST 1927 Jun 10 23:00 |
-7:00 - MST 1930 Nov 15 |
-8:00 - PST 1931 Apr 1 |
-8:00 1:00 PDT 1931 Sep 30 |
-8:00 - PST 1942 Apr 24 |
-8:00 1:00 PWT 1945 Aug 14 23:00u |
-8:00 1:00 PPT 1945 Nov 12 # Peace |
-8:00 - PST 1948 Apr 5 |
-8:00 1:00 PDT 1949 Jan 14 |
-8:00 - PST 1954 |
-8:00 CA P%sT 1961 |
-8:00 - PST 1976 |
-8:00 US P%sT 1996 |
-8:00 Mexico P%sT 2001 |
-8:00 US P%sT 2002 Feb 20 |
-8:00 Mexico P%sT |
# From Paul Eggert (2006-03-22): |
# Formerly there was an America/Ensenada zone, which differed from |
# America/Tijuana only in that it did not observe DST from 1976 |
# through 1995. This was as per Shanks (1999). But Shanks & Pottenger say |
# Ensenada did not observe DST from 1948 through 1975. Guy Harris reports |
# that the 1987 OAG says "Only Ensenada, Mexicali, San Felipe and |
# Tijuana observe DST," which agrees with Shanks & Pottenger but implies that |
# DST-observance was a town-by-town matter back then. This concerns |
# data after 1970 so most likely there should be at least one Zone |
# other than America/Tijuana for Baja, but it's not clear yet what its |
# name or contents should be. |
# |
# Revillagigedo Is |
# no information |
|
############################################################################### |
|
# Anguilla |
# Antigua and Barbuda |
# See America/Port_of_Spain. |
|
# Bahamas |
# |
# For 1899 Milne gives -5:09:29.5; round that. |
# |
# From Sue Williams (2006-12-07): |
# The Bahamas announced about a month ago that they plan to change their DST |
# rules to sync with the U.S. starting in 2007.... |
# http://www.jonesbahamas.com/?c=45&a=10412 |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Bahamas 1964 1975 - Oct lastSun 2:00 0 S |
Rule Bahamas 1964 1975 - Apr lastSun 2:00 1:00 D |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Nassau -5:09:30 - LMT 1912 Mar 2 |
-5:00 Bahamas E%sT 1976 |
-5:00 US E%sT |
|
# Barbados |
|
# For 1899 Milne gives -3:58:29.2; round that. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Barb 1977 only - Jun 12 2:00 1:00 D |
Rule Barb 1977 1978 - Oct Sun>=1 2:00 0 S |
Rule Barb 1978 1980 - Apr Sun>=15 2:00 1:00 D |
Rule Barb 1979 only - Sep 30 2:00 0 S |
Rule Barb 1980 only - Sep 25 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Barbados -3:58:29 - LMT 1924 # Bridgetown |
-3:58:29 - BMT 1932 # Bridgetown Mean Time |
-4:00 Barb A%sT |
|
# Belize |
# Whitman entirely disagrees with Shanks; go with Shanks & Pottenger. |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Belize 1918 1942 - Oct Sun>=2 0:00 0:30 HD |
Rule Belize 1919 1943 - Feb Sun>=9 0:00 0 S |
Rule Belize 1973 only - Dec 5 0:00 1:00 D |
Rule Belize 1974 only - Feb 9 0:00 0 S |
Rule Belize 1982 only - Dec 18 0:00 1:00 D |
Rule Belize 1983 only - Feb 12 0:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Belize -5:52:48 - LMT 1912 Apr |
-6:00 Belize C%sT |
|
# Bermuda |
|
# For 1899 Milne gives -4:19:18.3 as the meridian of the clock tower, |
# Bermuda dockyard, Ireland I; round that. |
|
# From Dan Jones, reporting in The Royal Gazette (2006-06-26): |
|
# Next year, however, clocks in the US will go forward on the second Sunday |
# in March, until the first Sunday in November. And, after the Time Zone |
# (Seasonal Variation) Bill 2006 was passed in the House of Assembly on |
# Friday, the same thing will happen in Bermuda. |
# http://www.theroyalgazette.com/apps/pbcs.dll/article?AID=/20060529/NEWS/105290135 |
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone Atlantic/Bermuda -4:19:18 - LMT 1930 Jan 1 2:00 # Hamilton |
-4:00 - AST 1974 Apr 28 2:00 |
-4:00 Canada A%sT 1976 |
-4:00 US A%sT |
|
# Cayman Is |
|
# From Paul Eggert (2015-05-15): |
# The Cayman government has decided to introduce DST in 2016, the idea being |
# to keep in sync with New York. The legislation hasn't passed but the change |
# seems quite likely. See: Meade B. Cayman 27. |
# http://www.cayman27.com.ky/2015/05/15/clock-ticks-toward-daylight-saving-time-in-cayman |
|
Zone America/Cayman -5:25:32 - LMT 1890 # Georgetown |
-5:07:11 - KMT 1912 Feb # Kingston Mean Time |
-5:00 - EST 2016 |
-5:00 US E%sT |
|
# Costa Rica |
|
# Milne gives -5:36:13.3 as San José mean time; round to nearest. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule CR 1979 1980 - Feb lastSun 0:00 1:00 D |
Rule CR 1979 1980 - Jun Sun>=1 0:00 0 S |
Rule CR 1991 1992 - Jan Sat>=15 0:00 1:00 D |
# IATA SSIM (1991-09) says the following was at 1:00; |
# go with Shanks & Pottenger. |
Rule CR 1991 only - Jul 1 0:00 0 S |
Rule CR 1992 only - Mar 15 0:00 0 S |
# There are too many San Josés elsewhere, so we'll use 'Costa Rica'. |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Costa_Rica -5:36:13 - LMT 1890 # San José |
-5:36:13 - SJMT 1921 Jan 15 # San José Mean Time |
-6:00 CR C%sT |
# Coco |
# no information; probably like America/Costa_Rica |
|
# Cuba |
|
# From Paul Eggert (2013-02-21): |
# Milne gives -5:28:50.45 for the observatory at Havana, -5:29:23.57 |
# for the port, and -5:30 for meteorological observations. |
# For now, stick with Shanks & Pottenger. |
|
# From Arthur David Olson (1999-03-29): |
# The 1999-03-28 exhibition baseball game held in Havana, Cuba, between |
# the Cuban National Team and the Baltimore Orioles was carried live on |
# the Orioles Radio Network, including affiliate WTOP in Washington, DC. |
# During the game, play-by-play announcer Jim Hunter noted that |
# "We'll be losing two hours of sleep...Cuba switched to Daylight Saving |
# Time today." (The "two hour" remark referred to losing one hour of |
# sleep on 1999-03-28 - when the announcers were in Cuba as it switched |
# to DST - and one more hour on 1999-04-04 - when the announcers will have |
# returned to Baltimore, which switches on that date.) |
|
# From Steffen Thorsen (2013-11-11): |
# DST start in Cuba in 2004 ... does not follow the same rules as the |
# years before. The correct date should be Sunday 2004-03-28 00:00 ... |
# https://web.archive.org/web/20040402060750/http://www.granma.cu/espanol/2004/marzo/sab27/reloj.html |
|
# From Evert van der Veer via Steffen Thorsen (2004-10-28): |
# Cuba is not going back to standard time this year. |
# From Paul Eggert (2006-03-22): |
# http://www.granma.cu/ingles/2004/septiembre/juev30/41medid-i.html |
# says that it's due to a problem at the Antonio Guiteras |
# thermoelectric plant, and says "This October there will be no return |
# to normal hours (after daylight saving time)". |
# For now, let's assume that it's a temporary measure. |
|
# From Carlos A. Carnero Delgado (2005-11-12): |
# This year (just like in 2004-2005) there's no change in time zone |
# adjustment in Cuba. We will stay in daylight saving time: |
# http://www.granma.cu/espanol/2005/noviembre/mier9/horario.html |
|
# From Jesper Nørgaard Welen (2006-10-21): |
# An article in GRANMA INTERNACIONAL claims that Cuba will end |
# the 3 years of permanent DST next weekend, see |
# http://www.granma.cu/ingles/2006/octubre/lun16/43horario.html |
# "On Saturday night, October 28 going into Sunday, October 29, at 01:00, |
# watches should be set back one hour - going back to 00:00 hours - returning |
# to the normal schedule.... |
|
# From Paul Eggert (2007-03-02): |
# <http://www.granma.cubaweb.cu/english/news/art89.html>, dated yesterday, |
# says Cuban clocks will advance at midnight on March 10. |
# For lack of better information, assume Cuba will use US rules, |
# except that it switches at midnight standard time as usual. |
# |
# From Steffen Thorsen (2007-10-25): |
# Carlos Alberto Fonseca Arauz informed me that Cuba will end DST one week |
# earlier - on the last Sunday of October, just like in 2006. |
# |
# He supplied these references: |
# |
# http://www.prensalatina.com.mx/article.asp?ID=%7B4CC32C1B-A9F7-42FB-8A07-8631AFC923AF%7D&language=ES |
# http://actualidad.terra.es/sociedad/articulo/cuba_llama_ahorrar_energia_cambio_1957044.htm |
# |
# From Alex Krivenyshev (2007-10-25): |
# Here is also article from Granma (Cuba): |
# |
# Regirá el Horario Normal desde el próximo domingo 28 de octubre |
# http://www.granma.cubaweb.cu/2007/10/24/nacional/artic07.html |
# |
# http://www.worldtimezone.com/dst_news/dst_news_cuba03.html |
|
# From Arthur David Olson (2008-03-09): |
# I'm in Maryland which is now observing United States Eastern Daylight |
# Time. At 9:44 local time I used RealPlayer to listen to |
# http://media.enet.cu/radioreloj |
# a Cuban information station, and heard |
# the time announced as "ocho cuarenta y cuatro" ("eight forty-four"), |
# indicating that Cuba is still on standard time. |
|
# From Steffen Thorsen (2008-03-12): |
# It seems that Cuba will start DST on Sunday, 2007-03-16... |
# It was announced yesterday, according to this source (in Spanish): |
# http://www.nnc.cubaweb.cu/marzo-2008/cien-1-11-3-08.htm |
# |
# Some more background information is posted here: |
# http://www.timeanddate.com/news/time/cuba-starts-dst-march-16.html |
# |
# The article also says that Cuba has been observing DST since 1963, |
# while Shanks (and tzdata) has 1965 as the first date (except in the |
# 1940's). Many other web pages in Cuba also claim that it has been |
# observed since 1963, but with the exception of 1970 - an exception |
# which is not present in tzdata/Shanks. So there is a chance we need to |
# change some historic records as well. |
# |
# One example: |
# http://www.radiohc.cu/espanol/noticias/mar07/11mar/hor.htm |
|
# From Jesper Nørgaard Welen (2008-03-13): |
# The Cuban time change has just been confirmed on the most authoritative |
# web site, the Granma. Please check out |
# http://www.granma.cubaweb.cu/2008/03/13/nacional/artic10.html |
# |
# Basically as expected after Steffen Thorsen's information, the change |
# will take place midnight between Saturday and Sunday. |
|
# From Arthur David Olson (2008-03-12): |
# Assume Sun>=15 (third Sunday) going forward. |
|
# From Alexander Krivenyshev (2009-03-04) |
# According to the Radio Reloj - Cuba will start Daylight Saving Time on |
# midnight between Saturday, March 07, 2009 and Sunday, March 08, 2009- |
# not on midnight March 14 / March 15 as previously thought. |
# |
# http://www.worldtimezone.com/dst_news/dst_news_cuba05.html |
# (in Spanish) |
|
# From Arthur David Olson (2009-03-09) |
# I listened over the Internet to |
# http://media.enet.cu/readioreloj |
# this morning; when it was 10:05 a. m. here in Bethesda, Maryland the |
# the time was announced as "diez cinco" - the same time as here, indicating |
# that has indeed switched to DST. Assume second Sunday from 2009 forward. |
|
# From Steffen Thorsen (2011-03-08): |
# Granma announced that Cuba is going to start DST on 2011-03-20 00:00:00 |
# this year. Nothing about the end date known so far (if that has |
# changed at all). |
# |
# Source: |
# http://granma.co.cu/2011/03/08/nacional/artic01.html |
# |
# Our info: |
# http://www.timeanddate.com/news/time/cuba-starts-dst-2011.html |
# |
# From Steffen Thorsen (2011-10-30) |
# Cuba will end DST two weeks later this year. Instead of going back |
# tonight, it has been delayed to 2011-11-13 at 01:00. |
# |
# One source (Spanish) |
# http://www.radioangulo.cu/noticias/cuba/17105-cuba-restablecera-el-horario-del-meridiano-de-greenwich.html |
# |
# Our page: |
# http://www.timeanddate.com/news/time/cuba-time-changes-2011.html |
# |
# From Steffen Thorsen (2012-03-01) |
# According to Radio Reloj, Cuba will start DST on Midnight between March |
# 31 and April 1. |
# |
# Radio Reloj has the following info (Spanish): |
# http://www.radioreloj.cu/index.php/noticias-radio-reloj/71-miscelaneas/7529-cuba-aplicara-el-horario-de-verano-desde-el-1-de-abril |
# |
# Our info on it: |
# http://www.timeanddate.com/news/time/cuba-starts-dst-2012.html |
|
# From Steffen Thorsen (2012-11-03): |
# Radio Reloj and many other sources report that Cuba is changing back |
# to standard time on 2012-11-04: |
# http://www.radioreloj.cu/index.php/noticias-radio-reloj/36-nacionales/9961-regira-horario-normal-en-cuba-desde-el-domingo-cuatro-de-noviembre |
# From Paul Eggert (2012-11-03): |
# For now, assume the future rule is first Sunday in November. |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Cuba 1928 only - Jun 10 0:00 1:00 D |
Rule Cuba 1928 only - Oct 10 0:00 0 S |
Rule Cuba 1940 1942 - Jun Sun>=1 0:00 1:00 D |
Rule Cuba 1940 1942 - Sep Sun>=1 0:00 0 S |
Rule Cuba 1945 1946 - Jun Sun>=1 0:00 1:00 D |
Rule Cuba 1945 1946 - Sep Sun>=1 0:00 0 S |
Rule Cuba 1965 only - Jun 1 0:00 1:00 D |
Rule Cuba 1965 only - Sep 30 0:00 0 S |
Rule Cuba 1966 only - May 29 0:00 1:00 D |
Rule Cuba 1966 only - Oct 2 0:00 0 S |
Rule Cuba 1967 only - Apr 8 0:00 1:00 D |
Rule Cuba 1967 1968 - Sep Sun>=8 0:00 0 S |
Rule Cuba 1968 only - Apr 14 0:00 1:00 D |
Rule Cuba 1969 1977 - Apr lastSun 0:00 1:00 D |
Rule Cuba 1969 1971 - Oct lastSun 0:00 0 S |
Rule Cuba 1972 1974 - Oct 8 0:00 0 S |
Rule Cuba 1975 1977 - Oct lastSun 0:00 0 S |
Rule Cuba 1978 only - May 7 0:00 1:00 D |
Rule Cuba 1978 1990 - Oct Sun>=8 0:00 0 S |
Rule Cuba 1979 1980 - Mar Sun>=15 0:00 1:00 D |
Rule Cuba 1981 1985 - May Sun>=5 0:00 1:00 D |
Rule Cuba 1986 1989 - Mar Sun>=14 0:00 1:00 D |
Rule Cuba 1990 1997 - Apr Sun>=1 0:00 1:00 D |
Rule Cuba 1991 1995 - Oct Sun>=8 0:00s 0 S |
Rule Cuba 1996 only - Oct 6 0:00s 0 S |
Rule Cuba 1997 only - Oct 12 0:00s 0 S |
Rule Cuba 1998 1999 - Mar lastSun 0:00s 1:00 D |
Rule Cuba 1998 2003 - Oct lastSun 0:00s 0 S |
Rule Cuba 2000 2003 - Apr Sun>=1 0:00s 1:00 D |
Rule Cuba 2004 only - Mar lastSun 0:00s 1:00 D |
Rule Cuba 2006 2010 - Oct lastSun 0:00s 0 S |
Rule Cuba 2007 only - Mar Sun>=8 0:00s 1:00 D |
Rule Cuba 2008 only - Mar Sun>=15 0:00s 1:00 D |
Rule Cuba 2009 2010 - Mar Sun>=8 0:00s 1:00 D |
Rule Cuba 2011 only - Mar Sun>=15 0:00s 1:00 D |
Rule Cuba 2011 only - Nov 13 0:00s 0 S |
Rule Cuba 2012 only - Apr 1 0:00s 1:00 D |
Rule Cuba 2012 max - Nov Sun>=1 0:00s 0 S |
Rule Cuba 2013 max - Mar Sun>=8 0:00s 1:00 D |
|
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Havana -5:29:28 - LMT 1890 |
-5:29:36 - HMT 1925 Jul 19 12:00 # Havana MT |
-5:00 Cuba C%sT |
|
# Dominica |
# See America/Port_of_Spain. |
|
# Dominican Republic |
|
# From Steffen Thorsen (2000-10-30): |
# Enrique Morales reported to me that the Dominican Republic has changed the |
# time zone to Eastern Standard Time as of Sunday 29 at 2 am.... |
# http://www.listin.com.do/antes/261000/republica/princi.html |
|
# From Paul Eggert (2000-12-04): |
# That URL (2000-10-26, in Spanish) says they planned to use US-style DST. |
|
# From Rives McDow (2000-12-01): |
# Dominican Republic changed its mind and presidential decree on Tuesday, |
# November 28, 2000, with a new decree. On Sunday, December 3 at 1:00 AM the |
# Dominican Republic will be reverting to 8 hours from the International Date |
# Line, and will not be using DST in the foreseeable future. The reason they |
# decided to use DST was to be in synch with Puerto Rico, who was also going |
# to implement DST. When Puerto Rico didn't implement DST, the president |
# decided to revert. |
|
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule DR 1966 only - Oct 30 0:00 1:00 D |
Rule DR 1967 only - Feb 28 0:00 0 S |
Rule DR 1969 1973 - Oct lastSun 0:00 0:30 HD |
Rule DR 1970 only - Feb 21 0:00 0 S |
Rule DR 1971 only - Jan 20 0:00 0 S |
Rule DR 1972 1974 - Jan 21 0:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Santo_Domingo -4:39:36 - LMT 1890 |
-4:40 - SDMT 1933 Apr 1 12:00 # S. Dom. MT |
-5:00 DR E%sT 1974 Oct 27 |
-4:00 - AST 2000 Oct 29 2:00 |
-5:00 US E%sT 2000 Dec 3 1:00 |
-4:00 - AST |
|
# El Salvador |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Salv 1987 1988 - May Sun>=1 0:00 1:00 D |
Rule Salv 1987 1988 - Sep lastSun 0:00 0 S |
# There are too many San Salvadors elsewhere, so use America/El_Salvador |
# instead of America/San_Salvador. |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/El_Salvador -5:56:48 - LMT 1921 # San Salvador |
-6:00 Salv C%sT |
|
# Grenada |
# Guadeloupe |
# St Barthélemy |
# St Martin (French part) |
# See America/Port_of_Spain. |
|
# Guatemala |
# |
# From Gwillim Law (2006-04-22), after a heads-up from Oscar van Vlijmen: |
# Diario Co Latino, at |
# <http://www.diariocolatino.com/internacionales/detalles.asp?NewsID=8079>, |
# says in an article dated 2006-04-19 that the Guatemalan government had |
# decided on that date to advance official time by 60 minutes, to lessen the |
# impact of the elevated cost of oil.... Daylight saving time will last from |
# 2006-04-29 24:00 (Guatemalan standard time) to 2006-09-30 (time unspecified). |
# From Paul Eggert (2006-06-22): |
# The Ministry of Energy and Mines, press release CP-15/2006 |
# (2006-04-19), says DST ends at 24:00. See |
# http://www.sieca.org.gt/Sitio_publico/Energeticos/Doc/Medidas/Cambio_Horario_Nac_190406.pdf |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Guat 1973 only - Nov 25 0:00 1:00 D |
Rule Guat 1974 only - Feb 24 0:00 0 S |
Rule Guat 1983 only - May 21 0:00 1:00 D |
Rule Guat 1983 only - Sep 22 0:00 0 S |
Rule Guat 1991 only - Mar 23 0:00 1:00 D |
Rule Guat 1991 only - Sep 7 0:00 0 S |
Rule Guat 2006 only - Apr 30 0:00 1:00 D |
Rule Guat 2006 only - Oct 1 0:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Guatemala -6:02:04 - LMT 1918 Oct 5 |
-6:00 Guat C%sT |
|
# Haiti |
# From Gwillim Law (2005-04-15): |
# Risto O. Nykänen wrote me that Haiti is now on DST. |
# I searched for confirmation, and I found a press release |
# on the Web page of the Haitian Consulate in Chicago (2005-03-31), |
# <http://www.haitianconsulate.org/time.doc>. Translated from French, it says: |
# |
# "The Prime Minister's Communication Office notifies the public in general |
# and the press in particular that, following a decision of the Interior |
# Ministry and the Territorial Collectivities [I suppose that means the |
# provinces], Haiti will move to Eastern Daylight Time in the night from next |
# Saturday the 2nd to Sunday the 3rd. |
# |
# "Consequently, the Prime Minister's Communication Office wishes to inform |
# the population that the country's clocks will be set forward one hour |
# starting at midnight. This provision will hold until the last Saturday in |
# October 2005. |
# |
# "Port-au-Prince, March 31, 2005" |
# |
# From Steffen Thorsen (2006-04-04): |
# I have been informed by users that Haiti observes DST this year like |
# last year, so the current "only" rule for 2005 might be changed to a |
# "max" rule or to last until 2006. (Who knows if they will observe DST |
# next year or if they will extend their DST like US/Canada next year). |
# |
# I have found this article about it (in French): |
# http://www.haitipressnetwork.com/news.cfm?articleID=7612 |
# |
# The reason seems to be an energy crisis. |
|
# From Stephen Colebourne (2007-02-22): |
# Some IATA info: Haiti won't be having DST in 2007. |
|
# From Steffen Thorsen (2012-03-11): |
# According to several news sources, Haiti will observe DST this year, |
# apparently using the same start and end date as USA/Canada. |
# So this means they have already changed their time. |
# |
# http://www.alterpresse.org/spip.php?article12510 |
# http://radiovision2000haiti.net/home/?p=13253 |
# |
# From Arthur David Olson (2012-03-11): |
# The alterpresse.org source seems to show a US-style leap from 2:00 a.m. to |
# 3:00 a.m. rather than the traditional Haitian jump at midnight. |
# Assume a US-style fall back as well. |
|
# From Steffen Thorsen (2013-03-10): |
# It appears that Haiti is observing DST this year as well, same rules |
# as US/Canada. They did it last year as well, and it looks like they |
# are going to observe DST every year now... |
# |
# http://radiovision2000haiti.net/public/haiti-avis-changement-dheure-dimanche/ |
# http://www.canalplushaiti.net/?p=6714 |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Haiti 1983 only - May 8 0:00 1:00 D |
Rule Haiti 1984 1987 - Apr lastSun 0:00 1:00 D |
Rule Haiti 1983 1987 - Oct lastSun 0:00 0 S |
# Shanks & Pottenger say AT is 2:00, but IATA SSIM (1991/1997) says 1:00s. |
# Go with IATA. |
Rule Haiti 1988 1997 - Apr Sun>=1 1:00s 1:00 D |
Rule Haiti 1988 1997 - Oct lastSun 1:00s 0 S |
Rule Haiti 2005 2006 - Apr Sun>=1 0:00 1:00 D |
Rule Haiti 2005 2006 - Oct lastSun 0:00 0 S |
Rule Haiti 2012 max - Mar Sun>=8 2:00 1:00 D |
Rule Haiti 2012 max - Nov Sun>=1 2:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Port-au-Prince -4:49:20 - LMT 1890 |
-4:49 - PPMT 1917 Jan 24 12:00 # P-a-P MT |
-5:00 Haiti E%sT |
|
# Honduras |
# Shanks & Pottenger say 1921 Jan 1; go with Whitman's more precise Apr 1. |
|
# From Paul Eggert (2006-05-05): |
# worldtimezone.com reports a 2006-05-02 Spanish-language AP article |
# saying Honduras will start using DST midnight Saturday, effective 4 |
# months until September. La Tribuna reported today |
# <http://www.latribuna.hn/99299.html> that Manuel Zelaya, the president |
# of Honduras, refused to back down on this. |
|
# From Jesper Nørgaard Welen (2006-08-08): |
# It seems that Honduras has returned from DST to standard time this Monday at |
# 00:00 hours (prolonging Sunday to 25 hours duration). |
# http://www.worldtimezone.com/dst_news/dst_news_honduras04.html |
|
# From Paul Eggert (2006-08-08): |
# Also see Diario El Heraldo, The country returns to standard time (2006-08-08). |
# http://www.elheraldo.hn/nota.php?nid=54941&sec=12 |
# It mentions executive decree 18-2006. |
|
# From Steffen Thorsen (2006-08-17): |
# Honduras will observe DST from 2007 to 2009, exact dates are not |
# published, I have located this authoritative source: |
# http://www.presidencia.gob.hn/noticia.aspx?nId=47 |
|
# From Steffen Thorsen (2007-03-30): |
# http://www.laprensahn.com/pais_nota.php?id04962=7386 |
# So it seems that Honduras will not enter DST this year.... |
|
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Hond 1987 1988 - May Sun>=1 0:00 1:00 D |
Rule Hond 1987 1988 - Sep lastSun 0:00 0 S |
Rule Hond 2006 only - May Sun>=1 0:00 1:00 D |
Rule Hond 2006 only - Aug Mon>=1 0:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Tegucigalpa -5:48:52 - LMT 1921 Apr |
-6:00 Hond C%sT |
# |
# Great Swan I ceded by US to Honduras in 1972 |
|
# Jamaica |
# Shanks & Pottenger give -5:07:12, but Milne records -5:07:10.41 from an |
# unspecified official document, and says "This time is used throughout the |
# island". Go with Milne. Round to the nearest second as required by zic. |
# |
# Shanks & Pottenger give April 28 for the 1974 spring-forward transition, but |
# Lance Neita writes that Prime Minister Michael Manley decreed it January 5. |
# Assume Neita meant Jan 6 02:00, the same as the US. Neita also writes that |
# Manley's supporters associated this act with Manley's nickname "Joshua" |
# (recall that in the Bible the sun stood still at Joshua's request), |
# and with the Rod of Correction which Manley said he had received from |
# Haile Selassie, Emperor of Ethiopia. See: |
# Neita L. The politician in all of us. Jamaica Observer 2014-09-20 |
# http://www.jamaicaobserver.com/columns/The-politician-in-all-of-us_17573647 |
# |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Jamaica -5:07:11 - LMT 1890 # Kingston |
-5:07:11 - KMT 1912 Feb # Kingston Mean Time |
-5:00 - EST 1974 |
-5:00 US E%sT 1984 |
-5:00 - EST |
|
# Martinique |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Martinique -4:04:20 - LMT 1890 # Fort-de-France |
-4:04:20 - FFMT 1911 May # Fort-de-France MT |
-4:00 - AST 1980 Apr 6 |
-4:00 1:00 ADT 1980 Sep 28 |
-4:00 - AST |
|
# Montserrat |
# See America/Port_of_Spain. |
|
# Nicaragua |
# |
# This uses Shanks & Pottenger for times before 2005. |
# |
# From Steffen Thorsen (2005-04-12): |
# I've got reports from 8 different people that Nicaragua just started |
# DST on Sunday 2005-04-10, in order to save energy because of |
# expensive petroleum. The exact end date for DST is not yet |
# announced, only "September" but some sites also say "mid-September". |
# Some background information is available on the President's official site: |
# http://www.presidencia.gob.ni/Presidencia/Files_index/Secretaria/Notas%20de%20Prensa/Presidente/2005/ABRIL/Gobierno-de-nicaragua-adelanta-hora-oficial-06abril.htm |
# The Decree, no 23-2005 is available here: |
# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2005/Decreto%2023-2005%20Se%20adelanta%20en%20una%20hora%20en%20todo%20el%20territorio%20nacional%20apartir%20de%20las%2024horas%20del%2009%20de%20Abril.pdf |
# |
# From Paul Eggert (2005-05-01): |
# The decree doesn't say anything about daylight saving, but for now let's |
# assume that it is daylight saving.... |
# |
# From Gwillim Law (2005-04-21): |
# The Associated Press story on the time change, which can be found at |
# http://www.lapalmainteractivo.com/guias/content/gen/ap/America_Latina/AMC_GEN_NICARAGUA_HORA.html |
# and elsewhere, says (fifth paragraph, translated from Spanish): "The last |
# time that a change of clocks was applied to save energy was in the year 2000 |
# during the Arnoldo Alemán administration."... |
# The northamerica file says that Nicaragua has been on UTC-6 continuously |
# since December 1998. I wasn't able to find any details of Nicaraguan time |
# changes in 2000. Perhaps a note could be added to the northamerica file, to |
# the effect that we have indirect evidence that DST was observed in 2000. |
# |
# From Jesper Nørgaard Welen (2005-11-02): |
# Nicaragua left DST the 2005-10-02 at 00:00 (local time). |
# http://www.presidencia.gob.ni/presidencia/files_index/secretaria/comunicados/2005/septiembre/26septiembre-cambio-hora.htm |
# (2005-09-26) |
# |
# From Jesper Nørgaard Welen (2006-05-05): |
# http://www.elnuevodiario.com.ni/2006/05/01/nacionales/18410 |
# (my informal translation) |
# By order of the president of the republic, Enrique Bolaños, Nicaragua |
# advanced by sixty minutes their official time, yesterday at 2 in the |
# morning, and will stay that way until 30th of September. |
# |
# From Jesper Nørgaard Welen (2006-09-30): |
# http://www.presidencia.gob.ni/buscador_gaceta/BD/DECRETOS/2006/D-063-2006P-PRN-Cambio-Hora.pdf |
# My informal translation runs: |
# The natural sun time is restored in all the national territory, in that the |
# time is returned one hour at 01:00 am of October 1 of 2006. |
# |
# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S |
Rule Nic 1979 1980 - Mar Sun>=16 0:00 1:00 D |
Rule Nic 1979 1980 - Jun Mon>=23 0:00 0 S |
Rule Nic 2005 only - Apr 10 0:00 1:00 D |
Rule Nic 2005 only - Oct Sun>=1 0:00 0 S |
Rule Nic 2006 only - Apr 30 2:00 1:00 D |
Rule Nic 2006 only - Oct Sun>=1 1:00 0 S |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Managua -5:45:08 - LMT 1890 |
-5:45:12 - MMT 1934 Jun 23 # Managua Mean Time? |
-6:00 - CST 1973 May |
-5:00 - EST 1975 Feb 16 |
-6:00 Nic C%sT 1992 Jan 1 4:00 |
-5:00 - EST 1992 Sep 24 |
-6:00 - CST 1993 |
-5:00 - EST 1997 |
-6:00 Nic C%sT |
|
# Panama |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Panama -5:18:08 - LMT 1890 |
-5:19:36 - CMT 1908 Apr 22 # Colón Mean Time |
-5:00 - EST |
|
# Puerto Rico |
# There are too many San Juans elsewhere, so we'll use 'Puerto_Rico'. |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Puerto_Rico -4:24:25 - LMT 1899 Mar 28 12:00 # San Juan |
-4:00 - AST 1942 May 3 |
-4:00 US A%sT 1946 |
-4:00 - AST |
|
# St Kitts-Nevis |
# St Lucia |
# See America/Port_of_Spain. |
|
# St Pierre and Miquelon |
# There are too many St Pierres elsewhere, so we'll use 'Miquelon'. |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Miquelon -3:44:40 - LMT 1911 May 15 # St Pierre |
-4:00 - AST 1980 May |
-3:00 - PMST 1987 # Pierre & Miquelon Time |
-3:00 Canada PM%sT |
|
# St Vincent and the Grenadines |
# See America/Port_of_Spain. |
|
# Turks and Caicos |
# |
# From Chris Dunn in |
# http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=415007 |
# (2007-03-15): In the Turks & Caicos Islands (America/Grand_Turk) the |
# daylight saving dates for time changes have been adjusted to match |
# the recent U.S. change of dates. |
# |
# From Brian Inglis (2007-04-28): |
# http://www.turksandcaicos.tc/calendar/index.htm [2007-04-26] |
# there is an entry for Nov 4 "Daylight Savings Time Ends 2007" and three |
# rows before that there is an out of date entry for Oct: |
# "Eastern Standard Times Begins 2007 |
# Clocks are set back one hour at 2:00 a.m. local Daylight Saving Time" |
# indicating that the normal ET rules are followed. |
# |
# From Paul Eggert (2014-08-19): |
# The 2014-08-13 Cabinet meeting decided to stay on UTC-4 year-round. See: |
# http://tcweeklynews.com/daylight-savings-time-to-be-maintained-p5353-127.htm |
# Model this as a switch from EST/EDT to AST ... |
# From Chris Walton (2014-11-04): |
# ... the TCI government appears to have delayed the switch to |
# "permanent daylight saving time" by one year.... |
# http://tcweeklynews.com/time-change-to-go-ahead-this-november-p5437-127.htm |
# |
# Zone NAME GMTOFF RULES FORMAT [UNTIL] |
Zone America/Grand_Turk -4:44:32 - LMT 1890 |
-5:07:11 - KMT 1912 Feb # Kingston Mean Time |
-5:00 - EST 1979 |
-5:00 US E%sT 2015 Nov Sun>=1 2:00 |
-4:00 - AST |
|
# British Virgin Is |
# Virgin Is |
# See America/Port_of_Spain. |
|
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