1# This file is in the public domain, so clarified as of
2# 2009-05-17 by Arthur David Olson.
3
4# This data is by no means authoritative; if you think you know better,
5# go ahead and edit the file (and please send any changes to
6# tz@iana.org for general use in the future).
7
8# From Paul Eggert (2006-03-22):
9# A good source for time zone historical data outside the U.S. is
10# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
11# San Diego: ACS Publications, Inc. (2003).
12#
13# For data circa 1899, a common source is:
14# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94
15# <http://www.jstor.org/stable/1774359>.
16#
17# Gwillim Law writes that a good source
18# for recent time zone data is the International Air Transport
19# Association's Standard Schedules Information Manual (IATA SSIM),
20# published semiannually. Law sent in several helpful summaries
21# of the IATA's data after 1990.
22#
23# Except where otherwise noted, Shanks & Pottenger is the source for
24# entries through 1990, and IATA SSIM is the source for entries afterwards.
25#
26# Earlier editions of these tables used the North American style (e.g. ARST and
27# ARDT for Argentine Standard and Daylight Time), but the following quote
28# suggests that it's better to use European style (e.g. ART and ARST).
29# I suggest the use of _Summer time_ instead of the more cumbersome
30# _daylight-saving time_. _Summer time_ seems to be in general use
31# in Europe and South America.
32# --���E O Cutler, _New York Times_ (1937-02-14), quoted in
33# H L Mencken, _The American Language: Supplement I_ (1960), p 466
34#
35# Earlier editions of these tables also used the North American style
36# for time zones in Brazil, but this was incorrect, as Brazilians say
37# "summer time". Reinaldo Goulart, a S��o Paulo businessman active in
38# the railroad sector, writes (1999-07-06):
39# The subject of time zones is currently a matter of discussion/debate in
40# Brazil. Let's say that "the Bras��lia time" is considered the
41# "official time" because Bras��lia is the capital city.
42# The other three time zones are called "Bras��lia time "minus one" or
43# "plus one" or "plus two". As far as I know there is no such
44# name/designation as "Eastern Time" or "Central Time".
45# So I invented the following (English-language) abbreviations for now.
46# Corrections are welcome!
47# std dst
48# -2:00 FNT FNST Fernando de Noronha
49# -3:00 BRT BRST Bras��lia
50# -4:00 AMT AMST Amazon
51# -5:00 ACT ACST Acre
52
53###############################################################################
54
55###############################################################################
56
57# Argentina
58
59# From Bob Devine (1988-01-28):
60# Argentina: first Sunday in October to first Sunday in April since 1976.
61# Double Summer time from 1969 to 1974. Switches at midnight.
62
63# From U. S. Naval Observatory (1988-01-19):
64# ARGENTINA 3 H BEHIND UTC
65
66# From Hernan G. Otero (1995-06-26):
67# I am sending modifications to the Argentine time zone table...
68# AR was chosen because they are the ISO letters that represent Argentina.
69
70# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
71Rule Arg 1930 only - Dec 1 0:00 1:00 S
72Rule Arg 1931 only - Apr 1 0:00 0 -
73Rule Arg 1931 only - Oct 15 0:00 1:00 S
74Rule Arg 1932 1940 - Mar 1 0:00 0 -
75Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
76Rule Arg 1940 only - Jul 1 0:00 1:00 S
77Rule Arg 1941 only - Jun 15 0:00 0 -
78Rule Arg 1941 only - Oct 15 0:00 1:00 S
79Rule Arg 1943 only - Aug 1 0:00 0 -
80Rule Arg 1943 only - Oct 15 0:00 1:00 S
81Rule Arg 1946 only - Mar 1 0:00 0 -
82Rule Arg 1946 only - Oct 1 0:00 1:00 S
83Rule Arg 1963 only - Oct 1 0:00 0 -
84Rule Arg 1963 only - Dec 15 0:00 1:00 S
85Rule Arg 1964 1966 - Mar 1 0:00 0 -
86Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
87Rule Arg 1967 only - Apr 2 0:00 0 -
88Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
89Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
90Rule Arg 1974 only - Jan 23 0:00 1:00 S
91Rule Arg 1974 only - May 1 0:00 0 -
92Rule Arg 1988 only - Dec 1 0:00 1:00 S
93#
94# From Hernan G. Otero (1995-06-26):
95# These corrections were contributed by InterSoft Argentina S.A.,
96# obtaining the data from the:
97# Talleres de Hidrograf��a Naval Argentina
98# (Argentine Naval Hydrography Institute)
99Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
100Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
101#
102# From Hernan G. Otero (1995-06-26):
103# From this moment on, the law that mandated the daylight saving
104# time corrections was derogated and no more modifications
105# to the time zones (for daylight saving) are now made.
106#
107# From Rives McDow (2000-01-10):
108# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
109# which did not result in the switch of a time zone, as they stayed 9 hours
110# from the International Date Line.
111Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
112# From Paul Eggert (2007-12-28):
113# DST was set to expire on March 5, not March 3, but since it was converted
114# to standard time on March 3 it's more convenient for us to pretend that
115# it ended on March 3.
116Rule Arg 2000 only - Mar 3 0:00 0 -
117#
118# From Peter Gradelski via Steffen Thorsen (2000-03-01):
119# We just checked with our S��o Paulo office and they say the government of
120# Argentina decided not to become one of the countries that go on or off DST.
121# So Buenos Aires should be -3 hours from GMT at all times.
122#
123# From Fabi��n L. Arce Jofr�� (2000-04-04):
124# The law that claimed DST for Argentina was derogated by President Fernando
125# de la R��a on March 2, 2000, because it would make people spend more energy
126# in the winter time, rather than less. The change took effect on March 3.
127#
128# From Mariano Absatz (2001-06-06):
129# one of the major newspapers here in Argentina said that the 1999
130# Timezone Law (which never was effectively applied) will (would?) be
131# in effect.... The article is at
132# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
133# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
134# 1999-09-17, and published 1999-09-21. The official publication is at:
135# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
136# Regretfully, you have to subscribe (and pay) for the on-line version....
137#
138# (2001-06-12):
139# the timezone for Argentina will not change next Sunday.
140# Apparently it will do so on Sunday 24th....
141# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
142#
143# (2001-06-25):
144# Last Friday (yes, the last working day before the date of the change), the
145# Senate annulled the 1999 law that introduced the changes later postponed.
146# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
147# It remains the vote of the Deputies..., but it will be the same....
148# This kind of things had always been done this way in Argentina.
149# We are still -03:00 all year round in all of the country.
150#
151# From Steffen Thorsen (2007-12-21):
152# A user (Leonardo Chaim) reported that Argentina will adopt DST....
153# all of the country (all Zone-entries) are affected. News reports like
154# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
155# that Argentina will use DST next year as well, from October to
156# March, although exact rules are not given.
157#
158# From Jesper N��rgaard Welen (2007-12-26)
159# The last hurdle of Argentina DST is over, the proposal was approved in
160# the lower chamber too (Diputados) with a vote 192 for and 2 against.
161# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
162# the original scanned proposal, where the dates and the zero hours are
163# clear and unambiguous...This is the article about final approval:
164# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
165#
166# From Paul Eggert (2007-12-22):
167# For dates after mid-2008, the following rules are my guesses and
168# are quite possibly wrong, but are more likely than no DST at all.
169
170# From Alexander Krivenyshev (2008-09-05):
171# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
172# Argentina will start DST on Sunday October 19, 2008.
173#
174# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
175# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
176
177# From Rodrigo Severo (2008-10-06):
178# Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
179# ...
180# ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
181# Hi, there is a problem with timezone-data-2008e and maybe with
182# timezone-data-2008f
183# Argentinian law [Number] 25.155 is no longer valid.
184# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
185# The new one is law [Number] 26.350
186# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
187# So there is no summer time in Argentina for now.
188
189# From Mariano Absatz (2008-10-20):
190# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina
191# From 2008-10-19 until 2009-03-15
192# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
193#
194
195# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
196# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
197# Pampa, Neuqu��n, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
198# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
199#
200# Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying
201# it will not apply DST either (even when it was not included in Decree 1705/2008)
202# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
203
204# From fullinet (2009-10-18):
205# As announced in
206# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
207# (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change")
208#
209# "Por el momento, el Gobierno Nacional resolvi�� no modificar la hora
210# oficial, decisi��n que estaba en estudio para su implementaci��n el
211# domingo 18 de octubre. Desde el Ministerio de Planificaci��n se anunci��
212# que la Argentina hoy, en estas condiciones meteorol��gicas, no necesita
213# la modificaci��n del huso horario, ya que 2009 nos encuentra con
214# crecimiento en la producci��n y distribuci��n energ��tica."
215
216Rule Arg 2007 only - Dec 30 0:00 1:00 S
217Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
218Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
219
220# From Mariano Absatz (2004-05-21):
221# Today it was officially published that the Province of Mendoza is changing
222# its timezone this winter... starting tomorrow night....
223# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
224# From Paul Eggert (2004-05-24):
225# It's Law No. 7,210. This change is due to a public power emergency, so for
226# now we'll assume it's for this year only.
227#
228# From Paul Eggert (2006-03-22):
229# Hora de verano para la Republica Argentina (2003-06-08)
230# <http://www.spicasc.net/horvera.html>
231# says that standard time in Argentina from 1894-10-31
232# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
233# over Shanks & Pottenger.
234#
235# From Mariano Absatz (2004-06-05):
236# These media articles from a major newspaper mostly cover the current state:
237# http://www.lanacion.com.ar/04/05/27/de_604825.asp
238# http://www.lanacion.com.ar/04/05/28/de_605203.asp
239#
240# The following eight (8) provinces pulled clocks back to UTC-04:00 at
241# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
242# Apparently, all nine provinces would go back to UTC-03:00 at the same
243# time in October 17th.
244#
245# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
246# Tierra del Fuego, Tucum��n.
247#
248# From Mariano Absatz (2004-06-14):
249# ... this weekend, the Province of Tucum��n decided it'd go back to UTC-03:00
250# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
251# annoyance with the change is much higher than the power savings obtained....
252#
253# From Gwillim Law (2004-06-14):
254# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
255# "The time change in Tierra del Fuego was a conflicted decision from
256# the start. The government had decreed that the measure would take
257# effect on June 1, but a normative error forced the new time to begin
258# three days earlier, from a Saturday to a Sunday....
259# Our understanding was that the change was originally scheduled to take place
260# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
261# provinces). Sunday was May 30, only two days earlier. So the article
262# contains a contradiction. I would give more credence to the Saturday/Sunday
263# date than the "three days earlier" phrase, and conclude that Tierra del
264# Fuego set its clocks back at 2004-05-30 00:00.
265#
266# From Steffen Thorsen (2004-10-05):
267# The previous law 7210 which changed the province of Mendoza's time zone
268# back in May have been modified slightly in a new law 7277, which set the
269# new end date to 2004-09-26 (original date was 2004-10-17).
270# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
271#
272# From Mariano Absatz (2004-10-05):
273# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
274# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
275# at midnight between Saturday, July 24th and Sunday, July 25th....
276# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
277# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
278# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
279
280# From Alex Krivenyshev (2008-01-17):
281# Here are articles that Argentina Province San Luis is planning to end DST
282# as earlier as upcoming Monday January 21, 2008 or February 2008:
283#
284# Provincia argentina retrasa reloj y marca diferencia con resto del pa��s
285# (Argentine Province delayed clock and mark difference with the rest of the
286# country)
287# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
288#
289# Es inminente que en San Luis atrasen una hora los relojes
290# (It is imminent in San Luis clocks one hour delay)
291# http://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
292# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
293
294# From Jesper N��rgaard Welen (2008-01-18):
295# The page of the San Luis provincial government
296# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
297# confirms what Alex Krivenyshev has earlier sent to the tz
298# emailing list about that San Luis plans to return to standard
299# time much earlier than the rest of the country. It also
300# confirms that upon request the provinces San Juan and Mendoza
301# refused to follow San Luis in this change.
302#
303# The change is supposed to take place Monday the 21.st at 0:00
304# hours. As far as I understand it if this goes ahead, we need
305# a new timezone for San Luis (although there are also documented
306# independent changes in the southamerica file of San Luis in
307# 1990 and 1991 which has not been confirmed).
308
309# From Jesper N��rgaard Welen (2008-01-25):
310# Unfortunately the below page has become defunct, about the San Luis
311# time change. Perhaps because it now is part of a group of pages "Most
312# important pages of 2008."
313#
314# You can use
315# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
316# instead it seems. Or use "Buscador" from the main page of the San Luis
317# government, and fill in "huso" and click OK, and you will get 3 pages
318# from which the first one is identical to the above.
319
320# From Mariano Absatz (2008-01-28):
321# I can confirm that the Province of San Luis (and so far only that
322# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
323# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
324# 1 hour), and they intend to keep UTC-3 as their timezone all year round
325# (that is, unless they change their mind any minute now).
326#
327# So we'll have to add yet another city to 'southamerica' (I think San
328# Luis city is the mos populated city in the Province, so it'd be
329# America/Argentina/San_Luis... of course I can't remember if San Luis's
330# history of particular changes goes along with Mendoza or San Juan :-(
331# (I only remember not being able to collect hard facts about San Luis
332# back in 2004, when these provinces changed to UTC-4 for a few days, I
333# mailed them personally and never got an answer).
334
335# From Paul Eggert (2008-06-30):
336# Unless otherwise specified, data are from Shanks & Pottenger through 1992,
337# from the IATA otherwise. As noted below, Shanks & Pottenger say that
338# America/Cordoba split into 6 subregions during 1991/1992, one of which
339# was America/San_Luis, but we haven't verified this yet so for now we'll
340# keep America/Cordoba a single region rather than splitting it into the
341# other 5 subregions.
342
343# From Mariano Absatz (2009-03-13):
344# Yesterday (with our usual 2-day notice) the Province of San Luis
345# decided that next Sunday instead of "staying" @utc-03:00 they will go
346# to utc-04:00 until the second Saturday in October...
347#
348# The press release is at
349# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
350# (I couldn't find the decree, but www.sanluis.gov.ar
351# is the official page for the Province Government.)
352#
353# There's also a note in only one of the major national papers ...
354# http://www.lanacion.com.ar/nota.asp?nota_id=1107912
355#
356# The press release says [quick and dirty translation]:
357# ... announced that next Sunday, at 00:00, Puntanos (the San Luis
358# inhabitants) will have to turn back one hour their clocks
359#
360# Since then, San Luis will establish its own Province timezone. Thus,
361# during 2009, this timezone change will run from 00:00 the third Sunday
362# in March until 24:00 of the second Saturday in October.
363
364# From Mariano Absatz (2009-10-16):
365# ...the Province of San Luis is a case in itself.
366#
367# The Law at
368# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
369# is ambiguous because establishes a calendar from the 2nd Sunday in
370# October at 0:00 thru the 2nd Saturday in March at 24:00 and the
371# complement of that starting on the 2nd Sunday of March at 0:00 and
372# ending on the 2nd Saturday of March at 24:00.
373#
374# This clearly breaks every time the 1st of March or October is a Sunday.
375#
376# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
377# Sunday of October and March.
378#
379# The problem is that the changes in the rest of the Provinces that did
380# change in 2007/2008, were made according to the Federal Law and Decrees
381# that did so on the 3rd Sunday of October and March.
382#
383# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
384# (October 11th) at 0:00.
385#
386# So I guess a new set of rules, besides "Arg", must be made and the last
387# America/Argentina/San_Luis entries should change to use these...
388#
389# I'm enclosing a patch that does what I say... regretfully, the San Luis
390# timezone must be called "WART/WARST" even when most of the time (like,
391# right now) WARST == ART... that is, since last Sunday, all the country
392# is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
393# of the country calls it "ART".
394# ...
395
396# From Alexander Krivenyshev (2010-04-09):
397# According to news reports from El Diario de la Republica Province San
398# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
399# after April 11, 2010 - will continue to have same time as rest of
400# Argentina (UTC-3) (no DST).
401#
402# Confirmaron la pr��rroga del huso horario de verano (Spanish)
403# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
404# or (some English translation):
405# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
406
407# From Mariano Absatz (2010-04-12):
408# yes...I can confirm this...and given that San Luis keeps calling
409# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
410# rules...San Luis is still using "Western ARgentina Time" and it got
411# stuck on Summer daylight savings time even though the summer is over.
412
413# From Paul Eggert (2013-09-05):
414# Perhaps San Luis operates on the legal fiction that it is at UTC-4
415# with perpetual summer time, but ordinary usage typically seems to
416# just say it's at UTC-3; see, for example,
417# <http://es.wikipedia.org/wiki/Hora_oficial_argentina>.
418# We've documented similar situations as being plain changes to
419# standard time, so let's do that here too. This does not change UTC
420# offsets, only tm_isdst and the time zone abbreviations. One minor
421# plus is that this silences a zic complaint that there's no POSIX TZ
422# setting for time stamps past 2038.
423
424# From Paul Eggert (2013-02-21):
425# Milne says C��rdoba time was -4:16:48.2. Round to the nearest second.
426
427# Zone NAME GMTOFF RULES FORMAT [UNTIL]
428#
429# Buenos Aires (BA), Capital Federal (CF),
430Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
431 -4:16:48 - CMT 1920 May # C��rdoba Mean Time
432 -4:00 - ART 1930 Dec
433 -4:00 Arg AR%sT 1969 Oct 5
434 -3:00 Arg AR%sT 1999 Oct 3
435 -4:00 Arg AR%sT 2000 Mar 3
436 -3:00 Arg AR%sT
437#
438# C��rdoba (CB), Santa Fe (SF), Entre R��os (ER), Corrientes (CN), Misiones (MN),
439# Chaco (CC), Formosa (FM), Santiago del Estero (SE)
440#
441# Shanks & Pottenger also make the following claims, which we haven't verified:
442# - Formosa switched to -3:00 on 1991-01-07.
443# - Misiones switched to -3:00 on 1990-12-29.
444# - Chaco switched to -3:00 on 1991-01-04.
445# - Santiago del Estero switched to -4:00 on 1991-04-01,
446# then to -3:00 on 1991-04-26.
447#
448Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
449 -4:16:48 - CMT 1920 May
450 -4:00 - ART 1930 Dec
451 -4:00 Arg AR%sT 1969 Oct 5
452 -3:00 Arg AR%sT 1991 Mar 3
453 -4:00 - WART 1991 Oct 20
454 -3:00 Arg AR%sT 1999 Oct 3
455 -4:00 Arg AR%sT 2000 Mar 3
456 -3:00 Arg AR%sT
457#
458# Salta (SA), La Pampa (LP), Neuqu��n (NQ), Rio Negro (RN)
459Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
460 -4:16:48 - CMT 1920 May
461 -4:00 - ART 1930 Dec
462 -4:00 Arg AR%sT 1969 Oct 5
463 -3:00 Arg AR%sT 1991 Mar 3
464 -4:00 - WART 1991 Oct 20
465 -3:00 Arg AR%sT 1999 Oct 3
466 -4:00 Arg AR%sT 2000 Mar 3
467 -3:00 Arg AR%sT 2008 Oct 18
468 -3:00 - ART
469#
470# Tucum��n (TM)
471Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
472 -4:16:48 - CMT 1920 May
473 -4:00 - ART 1930 Dec
474 -4:00 Arg AR%sT 1969 Oct 5
475 -3:00 Arg AR%sT 1991 Mar 3
476 -4:00 - WART 1991 Oct 20
477 -3:00 Arg AR%sT 1999 Oct 3
478 -4:00 Arg AR%sT 2000 Mar 3
479 -3:00 - ART 2004 Jun 1
480 -4:00 - WART 2004 Jun 13
481 -3:00 Arg AR%sT
482#
483# La Rioja (LR)
484Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
485 -4:16:48 - CMT 1920 May
486 -4:00 - ART 1930 Dec
487 -4:00 Arg AR%sT 1969 Oct 5
488 -3:00 Arg AR%sT 1991 Mar 1
489 -4:00 - WART 1991 May 7
490 -3:00 Arg AR%sT 1999 Oct 3
491 -4:00 Arg AR%sT 2000 Mar 3
492 -3:00 - ART 2004 Jun 1
493 -4:00 - WART 2004 Jun 20
494 -3:00 Arg AR%sT 2008 Oct 18
495 -3:00 - ART
496#
497# San Juan (SJ)
498Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
499 -4:16:48 - CMT 1920 May
500 -4:00 - ART 1930 Dec
501 -4:00 Arg AR%sT 1969 Oct 5
502 -3:00 Arg AR%sT 1991 Mar 1
503 -4:00 - WART 1991 May 7
504 -3:00 Arg AR%sT 1999 Oct 3
505 -4:00 Arg AR%sT 2000 Mar 3
506 -3:00 - ART 2004 May 31
507 -4:00 - WART 2004 Jul 25
508 -3:00 Arg AR%sT 2008 Oct 18
509 -3:00 - ART
510#
511# Jujuy (JY)
512Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
513 -4:16:48 - CMT 1920 May
514 -4:00 - ART 1930 Dec
515 -4:00 Arg AR%sT 1969 Oct 5
516 -3:00 Arg AR%sT 1990 Mar 4
517 -4:00 - WART 1990 Oct 28
518 -4:00 1:00 WARST 1991 Mar 17
519 -4:00 - WART 1991 Oct 6
520 -3:00 1:00 ARST 1992
521 -3:00 Arg AR%sT 1999 Oct 3
522 -4:00 Arg AR%sT 2000 Mar 3
523 -3:00 Arg AR%sT 2008 Oct 18
524 -3:00 - ART
525#
526# Catamarca (CT), Chubut (CH)
527Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
528 -4:16:48 - CMT 1920 May
529 -4:00 - ART 1930 Dec
530 -4:00 Arg AR%sT 1969 Oct 5
531 -3:00 Arg AR%sT 1991 Mar 3
532 -4:00 - WART 1991 Oct 20
533 -3:00 Arg AR%sT 1999 Oct 3
534 -4:00 Arg AR%sT 2000 Mar 3
535 -3:00 - ART 2004 Jun 1
536 -4:00 - WART 2004 Jun 20
537 -3:00 Arg AR%sT 2008 Oct 18
538 -3:00 - ART
539#
540# Mendoza (MZ)
541Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
542 -4:16:48 - CMT 1920 May
543 -4:00 - ART 1930 Dec
544 -4:00 Arg AR%sT 1969 Oct 5
545 -3:00 Arg AR%sT 1990 Mar 4
546 -4:00 - WART 1990 Oct 15
547 -4:00 1:00 WARST 1991 Mar 1
548 -4:00 - WART 1991 Oct 15
549 -4:00 1:00 WARST 1992 Mar 1
550 -4:00 - WART 1992 Oct 18
551 -3:00 Arg AR%sT 1999 Oct 3
552 -4:00 Arg AR%sT 2000 Mar 3
553 -3:00 - ART 2004 May 23
554 -4:00 - WART 2004 Sep 26
555 -3:00 Arg AR%sT 2008 Oct 18
556 -3:00 - ART
557#
558# San Luis (SL)
559
560Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
561Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S
562
563Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
564 -4:16:48 - CMT 1920 May
565 -4:00 - ART 1930 Dec
566 -4:00 Arg AR%sT 1969 Oct 5
567 -3:00 Arg AR%sT 1990
568 -3:00 1:00 ARST 1990 Mar 14
569 -4:00 - WART 1990 Oct 15
570 -4:00 1:00 WARST 1991 Mar 1
571 -4:00 - WART 1991 Jun 1
572 -3:00 - ART 1999 Oct 3
573 -4:00 1:00 WARST 2000 Mar 3
574 -3:00 - ART 2004 May 31
575 -4:00 - WART 2004 Jul 25
576 -3:00 Arg AR%sT 2008 Jan 21
577 -4:00 SanLuis WAR%sT 2009 Oct 11
578 -3:00 - ART
579#
580# Santa Cruz (SC)
581Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
582 -4:16:48 - CMT 1920 May # C��rdoba Mean Time
583 -4:00 - ART 1930 Dec
584 -4:00 Arg AR%sT 1969 Oct 5
585 -3:00 Arg AR%sT 1999 Oct 3
586 -4:00 Arg AR%sT 2000 Mar 3
587 -3:00 - ART 2004 Jun 1
588 -4:00 - WART 2004 Jun 20
589 -3:00 Arg AR%sT 2008 Oct 18
590 -3:00 - ART
591#
592# Tierra del Fuego, Ant��rtida e Islas del Atl��ntico Sur (TF)
593Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
594 -4:16:48 - CMT 1920 May # C��rdoba Mean Time
595 -4:00 - ART 1930 Dec
596 -4:00 Arg AR%sT 1969 Oct 5
597 -3:00 Arg AR%sT 1999 Oct 3
598 -4:00 Arg AR%sT 2000 Mar 3
599 -3:00 - ART 2004 May 30
600 -4:00 - WART 2004 Jun 20
601 -3:00 Arg AR%sT 2008 Oct 18
602 -3:00 - ART
603
604# Aruba
605Link America/Curacao America/Aruba
606
607# Bolivia
608# Zone NAME GMTOFF RULES FORMAT [UNTIL]
609Zone America/La_Paz -4:32:36 - LMT 1890
610 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
611 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
612 -4:00 - BOT # Bolivia Time
613
614# Brazil
615
616# From Paul Eggert (1993-11-18):
617# The mayor of Rio recently attempted to change the time zone rules
618# just in his city, in order to leave more summer time for the tourist trade.
619# The rule change lasted only part of the day;
620# the federal government refused to follow the city's rules, and business
621# was in a chaos, so the mayor backed down that afternoon.
622
623# From IATA SSIM (1996-02):
624# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
625# Santa Catarina (SC), Paran�� (PR), S��o Paulo (SP), Rio de Janeiro (RJ),
626# Esp��rito Santo (ES), Minas Gerais (MG), Bahia (BA), Goi��s (GO),
627# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
628# [The last three states are new to this issue of the IATA SSIM.]
629
630# From Gwillim Law (1996-10-07):
631# Geography, history (Tocantins was part of Goi��s until 1989), and other
632# sources of time zone information lead me to believe that AL, SE, and TO were
633# always in BR1, and so the only change was whether or not they observed DST....
634# The earliest issue of the SSIM I have is 2/91. Each issue from then until
635# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
636# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
637# (UTC-4).... The other two time zones given for Brazil are BR3, which is
638# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
639# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
640# become part of the state of Pernambuco). The boundary between BR1 and BR2
641# has never been clearly stated. They've simply been called East and West.
642# However, some conclusions can be drawn from another IATA manual: the Airline
643# Coding Directory, which lists close to 400 airports in Brazil. For each
644# airport it gives a time zone which is coded to the SSIM. From that
645# information, I'm led to conclude that the states of Amap�� (AP), Cear�� (CE),
646# Maranh��o (MA), Para��ba (PR), Pernambuco (PE), Piau�� (PI), and Rio Grande do
647# Norte (RN), and the eastern part of Par�� (PA) are all in BR1 without DST.
648
649# From Marcos Tadeu (1998-09-27):
650# Brazilian official page <http://pcdsh01.on.br/verao1.html>
651
652# From Jesper N��rgaard (2000-11-03):
653# [For an official list of which regions in Brazil use which time zones, see:]
654# http://pcdsh01.on.br/Fusbr.htm
655# http://pcdsh01.on.br/Fusbrhv.htm
656
657# From Celso Doria via David Madeo (2002-10-09):
658# The reason for the delay this year has to do with elections in Brazil.
659#
660# Unlike in the United States, elections in Brazil are 100% computerized and
661# the results are known almost immediately. Yesterday, it was the first
662# round of the elections when 115 million Brazilians voted for President,
663# Governor, Senators, Federal Deputies, and State Deputies. Nobody is
664# counting (or re-counting) votes anymore and we know there will be a second
665# round for the Presidency and also for some Governors. The 2nd round will
666# take place on October 27th.
667#
668# The reason why the DST will only begin November 3rd is that the thousands
669# of electoral machines used cannot have their time changed, and since the
670# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
671# the Government decided to postpone DST, instead of changing the Constitution
672# (maybe, for the next elections, it will be possible to change the clock)...
673
674# From Rodrigo Severo (2004-10-04):
675# It's just the biannual change made necessary by the much hyped, supposedly
676# modern Brazilian eletronic voting machines which, apparently, can't deal
677# with a time change between the first and the second rounds of the elections.
678
679# From Steffen Thorsen (2007-09-20):
680# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
681# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
682
683# From Paul Schulze (2008-06-24):
684# ...by law number 11.662 of April 24, 2008 (published in the "Diario
685# Oficial da Uni��o"...) in Brazil there are changes in the timezones,
686# effective today (00:00am at June 24, 2008) as follows:
687#
688# a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
689# part of the Amazonas state that had this timezone now being put to the
690# timezone UTC+4
691# b) The whole Par�� state now is put at timezone UTC+3, instead of just
692# part of it, as was before.
693#
694# This change follows a proposal of senator Tiao Viana of Acre state, that
695# proposed it due to concerns about open television channels displaying
696# programs inappropriate to youths in the states that had the timezone
697# UTC+5 too early in the night. In the occasion, some more corrections
698# were proposed, trying to unify the timezones of any given state. This
699# change modifies timezone rules defined in decree 2.784 of 18 June,
700# 1913.
701
702# From Rodrigo Severo (2008-06-24):
703# Just correcting the URL:
704# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
705#
706# As a result of the above Decree I believe the America/Rio_Branco
707# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
708# be created to represent the...west side of the Par�� State. I
709# suggest this new timezone be called Santarem as the most
710# important/populated city in the affected area.
711#
712# This new timezone would be the same as the Rio_Branco timezone up to
713# the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
714
715# From Alex Krivenyshev (2008-06-24):
716# This is a quick reference page for New and Old Brazil Time Zones map.
717# http://www.worldtimezone.com/brazil-time-new-old.php
718#
719# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
720# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
721# part of Par state is moving to one timezone UTC-03 (from UTC-04).
722
723# From Paul Eggert (2002-10-10):
724# The official decrees referenced below are mostly taken from
725# Decretos sobre o Hor��rio de Ver��o no Brasil
726# <http://pcdsh01.on.br/DecHV.html>.
727
728# From Steffen Thorsen (2008-08-29):
729# As announced by the government and many newspapers in Brazil late
730# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
731# it will end on 2009-02-15 (current rule for Brazil is fine). Based on
732# past years experience with the elections, there was a good chance that
733# the start was postponed to November, but it did not happen this year.
734#
735# It has not yet been posted to http://pcdsh01.on.br/DecHV.html
736#
737# An official page about it:
738# http://www.mme.gov.br/site/news/detail.do?newsId=16722
739# Note that this link does not always work directly, but must be accessed
740# by going to
741# http://www.mme.gov.br/first
742#
743# One example link that works directly:
744# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
745# (Portuguese)
746#
747# We have a written a short article about it as well:
748# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
749#
750# From Alexander Krivenyshev (2011-10-04):
751# State Bahia will return to Daylight savings time this year after 8 years off.
752# The announcement was made by Governor Jaques Wagner in an interview to a
753# television station in Salvador.
754
755# In Portuguese:
756# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
757# http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
758
759# From Guilherme Bernardes Rodrigues (2011-10-07):
760# There is news in the media, however there is still no decree about it.
761# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
762# official agency about time in Brazil, and she confirmed that the old rule is
763# still in force.
764
765# From Guilherme Bernardes Rodrigues (2011-10-14)
766# It's official, the President signed a decree that includes Bahia in summer
767# time.
768# [ and in a second message (same day): ]
769# I found the decree.
770#
771# DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011
772# Link :
773# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
774
775# From Kelley Cook (2012-10-16):
776# The governor of state of Bahia in Brazil announced on Thursday that
777# due to public pressure, he is reversing the DST policy they implemented
778# last year and will not be going to Summer Time on October 21st....
779# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
780
781# From Rodrigo Severo (2012-10-16):
782# Tocantins state will have DST.
783# http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
784
785# From Steffen Thorsen (2013-09-20):
786# Tocantins in Brazil is very likely not to observe DST from October....
787# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
788# We will keep this article updated when this is confirmed:
789# http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
790
791# From Steffen Thorsen (2013-10-17):
792# http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
793# Senator Jorge Viana announced that Acre will change time zone on November 10.
794# He did not specify the time of the change, nor if western parts of Amazonas
795# will change as well.
796#
797# From Paul Eggert (2013-10-17):
798# For now, assume western Amazonas will change as well.
799
800# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
801# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
802# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
803Rule Brazil 1931 only - Oct 3 11:00 1:00 S
804Rule Brazil 1932 1933 - Apr 1 0:00 0 -
805Rule Brazil 1932 only - Oct 3 0:00 1:00 S
806# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
807# revoked DST.
808# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
809# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
810Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
811Rule Brazil 1950 only - Apr 16 1:00 0 -
812Rule Brazil 1951 1952 - Apr 1 0:00 0 -
813# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
814Rule Brazil 1953 only - Mar 1 0:00 0 -
815# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
816# revoked DST.
817# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
818# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
819# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
820# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
821# extended the above decree to all of the national territory on 12-09.
822Rule Brazil 1963 only - Dec 9 0:00 1:00 S
823# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
824# extended summer time by one day to 1964-03-01 00:00 (start of school).
825Rule Brazil 1964 only - Mar 1 0:00 0 -
826# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
827Rule Brazil 1965 only - Jan 31 0:00 1:00 S
828Rule Brazil 1965 only - Mar 31 0:00 0 -
829# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
830Rule Brazil 1965 only - Dec 1 0:00 1:00 S
831# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
832Rule Brazil 1966 1968 - Mar 1 0:00 0 -
833Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
834# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
835# revoked DST.
836# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
837Rule Brazil 1985 only - Nov 2 0:00 1:00 S
838# Decree 92,310 (1986-01-21)
839# Decree 92,463 (1986-03-13)
840Rule Brazil 1986 only - Mar 15 0:00 0 -
841# Decree 93,316 (1986-10-01)
842Rule Brazil 1986 only - Oct 25 0:00 1:00 S
843Rule Brazil 1987 only - Feb 14 0:00 0 -
844# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
845Rule Brazil 1987 only - Oct 25 0:00 1:00 S
846Rule Brazil 1988 only - Feb 7 0:00 0 -
847# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
848# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
849Rule Brazil 1988 only - Oct 16 0:00 1:00 S
850Rule Brazil 1989 only - Jan 29 0:00 0 -
851# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
852# with the same exceptions
853Rule Brazil 1989 only - Oct 15 0:00 1:00 S
854Rule Brazil 1990 only - Feb 11 0:00 0 -
855# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
856# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
857# Decree 99,629 (1990-10-19) adds BA, MT.
858Rule Brazil 1990 only - Oct 21 0:00 1:00 S
859Rule Brazil 1991 only - Feb 17 0:00 0 -
860# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
861# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
862Rule Brazil 1991 only - Oct 20 0:00 1:00 S
863Rule Brazil 1992 only - Feb 9 0:00 0 -
864# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
865# adopted by same states.
866Rule Brazil 1992 only - Oct 25 0:00 1:00 S
867Rule Brazil 1993 only - Jan 31 0:00 0 -
868# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
869# adopted by same states, plus AM.
870# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
871# web page corrected 2004-01-07) adopted by same states, minus AM.
872# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
873# adopted by same states, plus MT and TO.
874# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
875# adds AL, SE.
876Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
877Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
878Rule Brazil 1996 only - Feb 11 0:00 0 -
879# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
880# adopted by same states, minus AL, SE.
881Rule Brazil 1996 only - Oct 6 0:00 1:00 S
882Rule Brazil 1997 only - Feb 16 0:00 0 -
883# From Daniel C. Sobral (1998-02-12):
884# In 1997, the DS began on October 6. The stated reason was that
885# because international television networks ignored Brazil's policy on DS,
886# they bought the wrong times on satellite for coverage of Pope's visit.
887# This year, the ending date of DS was postponed to March 1
888# to help dealing with the shortages of electric power.
889#
890# Decree 2,317 (1997-09-04), adopted by same states.
891Rule Brazil 1997 only - Oct 6 0:00 1:00 S
892# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
893# (1998-02-10)
894Rule Brazil 1998 only - Mar 1 0:00 0 -
895# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
896# adopted by the same states as before.
897Rule Brazil 1998 only - Oct 11 0:00 1:00 S
898Rule Brazil 1999 only - Feb 21 0:00 0 -
899# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
900# (1999-08-23) adopted by same states.
901# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
902# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
903Rule Brazil 1999 only - Oct 3 0:00 1:00 S
904Rule Brazil 2000 only - Feb 27 0:00 0 -
905# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
906# adopted by the same states as before.
907# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
908# repeals DST in PE and RR, effective 2000-10-15 00:00.
909# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
910# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
911# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
912# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
913Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
914Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
915# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
916# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
917Rule Brazil 2002 only - Nov 3 0:00 1:00 S
918# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
919# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
920Rule Brazil 2003 only - Oct 19 0:00 1:00 S
921# Decree 5,223 (2004-10-01) reestablishes DST in MT.
922# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
923Rule Brazil 2004 only - Nov 2 0:00 1:00 S
924# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
925# adopted by the same states as before.
926Rule Brazil 2005 only - Oct 16 0:00 1:00 S
927# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
928# adopted by the same states as before.
929Rule Brazil 2006 only - Nov 5 0:00 1:00 S
930Rule Brazil 2007 only - Feb 25 0:00 0 -
931# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
932# adopted by the same states as before.
933Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
934# From Frederico A. C. Neves (2008-09-10):
935# According to this decree
936# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
937# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
938# 3rd Feb Sunday. There is an exception on the return date when this is
939# the Carnival Sunday then the return date will be the next Sunday...
940Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
941Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
942Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
943Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
944Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
945Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
946Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
947Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
948Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
949Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
950Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
951Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
952Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
953# From Arthur David Olson (2008-09-29):
954# The next is wrong in some years but is better than nothing.
955Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
956
957# The latest ruleset listed above says that the following states observe DST:
958# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
959
960# Zone NAME GMTOFF RULES FORMAT [UNTIL]
961#
962# Fernando de Noronha (administratively part of PE)
963Zone America/Noronha -2:09:40 - LMT 1914
964 -2:00 Brazil FN%sT 1990 Sep 17
965 -2:00 - FNT 1999 Sep 30
966 -2:00 Brazil FN%sT 2000 Oct 15
967 -2:00 - FNT 2001 Sep 13
968 -2:00 Brazil FN%sT 2002 Oct 1
969 -2:00 - FNT
970# Other Atlantic islands have no permanent settlement.
971# These include Trindade and Martim Vaz (administratively part of ES),
972# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
973# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
974# it also included the Penedos.
975#
976# Amap�� (AP), east Par�� (PA)
977# East Par�� includes Bel��m, Marab��, Serra Norte, and S��o F��lix do Xingu.
978# The division between east and west Par�� is the river Xingu.
979# In the north a very small part from the river Javary (now Jari I guess,
980# the border with Amap��) to the Amazon, then to the Xingu.
981Zone America/Belem -3:13:56 - LMT 1914
982 -3:00 Brazil BR%sT 1988 Sep 12
983 -3:00 - BRT
984#
985# west Par�� (PA)
986# West Par�� includes Altamira, ��bidos, Prainha, Oriximin��, and Santar��m.
987Zone America/Santarem -3:38:48 - LMT 1914
988 -4:00 Brazil AM%sT 1988 Sep 12
989 -4:00 - AMT 2008 Jun 24 00:00
990 -3:00 - BRT
991#
992# Maranh��o (MA), Piau�� (PI), Cear�� (CE), Rio Grande do Norte (RN),
993# Para��ba (PB)
994Zone America/Fortaleza -2:34:00 - LMT 1914
995 -3:00 Brazil BR%sT 1990 Sep 17
996 -3:00 - BRT 1999 Sep 30
997 -3:00 Brazil BR%sT 2000 Oct 22
998 -3:00 - BRT 2001 Sep 13
999 -3:00 Brazil BR%sT 2002 Oct 1
1000 -3:00 - BRT
1001#
1002# Pernambuco (PE) (except Atlantic islands)
1003Zone America/Recife -2:19:36 - LMT 1914
1004 -3:00 Brazil BR%sT 1990 Sep 17
1005 -3:00 - BRT 1999 Sep 30
1006 -3:00 Brazil BR%sT 2000 Oct 15
1007 -3:00 - BRT 2001 Sep 13
1008 -3:00 Brazil BR%sT 2002 Oct 1
1009 -3:00 - BRT
1010#
1011# Tocantins (TO)
1012Zone America/Araguaina -3:12:48 - LMT 1914
1013 -3:00 Brazil BR%sT 1990 Sep 17
1014 -3:00 - BRT 1995 Sep 14
1015 -3:00 Brazil BR%sT 2003 Sep 24
1016 -3:00 - BRT 2012 Oct 21
1017 -3:00 Brazil BR%sT 2013 Sep
1018 -3:00 - BRT
1019#
1020# Alagoas (AL), Sergipe (SE)
1021Zone America/Maceio -2:22:52 - LMT 1914
1022 -3:00 Brazil BR%sT 1990 Sep 17
1023 -3:00 - BRT 1995 Oct 13
1024 -3:00 Brazil BR%sT 1996 Sep 4
1025 -3:00 - BRT 1999 Sep 30
1026 -3:00 Brazil BR%sT 2000 Oct 22
1027 -3:00 - BRT 2001 Sep 13
1028 -3:00 Brazil BR%sT 2002 Oct 1
1029 -3:00 - BRT
1030#
1031# Bahia (BA)
1032# There are too many Salvadors elsewhere, so use America/Bahia instead
1033# of America/Salvador.
1034Zone America/Bahia -2:34:04 - LMT 1914
1035 -3:00 Brazil BR%sT 2003 Sep 24
1036 -3:00 - BRT 2011 Oct 16
1037 -3:00 Brazil BR%sT 2012 Oct 21
1038 -3:00 - BRT
1039#
1040# Goi��s (GO), Distrito Federal (DF), Minas Gerais (MG),
1041# Esp��rito Santo (ES), Rio de Janeiro (RJ), S��o Paulo (SP), Paran�� (PR),
1042# Santa Catarina (SC), Rio Grande do Sul (RS)
1043Zone America/Sao_Paulo -3:06:28 - LMT 1914
1044 -3:00 Brazil BR%sT 1963 Oct 23 00:00
1045 -3:00 1:00 BRST 1964
1046 -3:00 Brazil BR%sT
1047#
1048# Mato Grosso do Sul (MS)
1049Zone America/Campo_Grande -3:38:28 - LMT 1914
1050 -4:00 Brazil AM%sT
1051#
1052# Mato Grosso (MT)
1053Zone America/Cuiaba -3:44:20 - LMT 1914
1054 -4:00 Brazil AM%sT 2003 Sep 24
1055 -4:00 - AMT 2004 Oct 1
1056 -4:00 Brazil AM%sT
1057#
1058# Rond��nia (RO)
1059Zone America/Porto_Velho -4:15:36 - LMT 1914
1060 -4:00 Brazil AM%sT 1988 Sep 12
1061 -4:00 - AMT
1062#
1063# Roraima (RR)
1064Zone America/Boa_Vista -4:02:40 - LMT 1914
1065 -4:00 Brazil AM%sT 1988 Sep 12
1066 -4:00 - AMT 1999 Sep 30
1067 -4:00 Brazil AM%sT 2000 Oct 15
1068 -4:00 - AMT
1069#
1070# east Amazonas (AM): Boca do Acre, Juta��, Manaus, Floriano Peixoto
1071# The great circle line from Tabatinga to Porto Acre divides
1072# east from west Amazonas.
1073Zone America/Manaus -4:00:04 - LMT 1914
1074 -4:00 Brazil AM%sT 1988 Sep 12
1075 -4:00 - AMT 1993 Sep 28
1076 -4:00 Brazil AM%sT 1994 Sep 22
1077 -4:00 - AMT
1078#
1079# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1080# Eirunep��, Envira, Ipixuna
1081Zone America/Eirunepe -4:39:28 - LMT 1914
1082 -5:00 Brazil AC%sT 1988 Sep 12
1083 -5:00 - ACT 1993 Sep 28
1084 -5:00 Brazil AC%sT 1994 Sep 22
1085 -5:00 - ACT 2008 Jun 24 00:00
1086 -4:00 - AMT 2013 Nov 10
1087 -5:00 - ACT
1088#
1089# Acre (AC)
1090Zone America/Rio_Branco -4:31:12 - LMT 1914
1091 -5:00 Brazil AC%sT 1988 Sep 12
1092 -5:00 - ACT 2008 Jun 24 00:00
1093 -4:00 - AMT 2013 Nov 10
1094 -5:00 - ACT
1095
1096# Chile
1097
1098# From Eduardo Krell (1995-10-19):
1099# The law says to switch to DST at midnight [24:00] on the second SATURDAY
1100# of October.... The law is the same for March and October.
1101# (1998-09-29):
1102# Because of the drought this year, the government decided to go into
1103# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1104# (unless there's another dry season next year, I guess).
1105
1106# From Julio I. Pacheco Troncoso (1999-03-18):
1107# Because of the same drought, the government decided to end DST later,
1108# on April 3, (one-time change).
1109
1110# From Oscar van Vlijmen (2006-10-08):
1111# http://www.horaoficial.cl/cambio.htm
1112
1113# From Jesper N��rgaard Welen (2006-10-08):
1114# I think that there are some obvious mistakes in the suggested link
1115# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1116# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1117# (they should have been 1990-09-15 and 1990-09-16 respectively), but
1118# anyhow it clears up some doubts too.
1119
1120# From Paul Eggert (2006-12-27):
1121# The following data for Chile and America/Santiago are from
1122# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1123# Jesper N��rgaard Welen. The data for Pacific/Easter are from Shanks
1124# & Pottenger, except with DST transitions after 1932 cloned from
1125# America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1126# but we have no other source.
1127
1128# From Germ��n Poo-Caama��o (2008-03-03):
1129# Due to drought, Chile extends Daylight Time in three weeks. This
1130# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1131# and Saturday 3/29 at 22:00 for Pacific/Easter)
1132# The Supreme Decree is located at
1133# http://www.shoa.cl/servicios/supremo316.pdf
1134# and the instructions for 2008 are located in:
1135# http://www.horaoficial.cl/cambio.htm
1136
1137# From Jos�� Miguel Garrido (2008-03-05):
1138# ...
1139# You could see the announces of the change on
1140# http://www.shoa.cl/noticias/2008/04hora/hora.htm
1141
1142# From Angel Chiang (2010-03-04):
1143# Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1144# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1145# (in Spanish, last paragraph).
1146#
1147# This is breaking news. There should be more information available later.
1148
1149# From Arthur Daivd Olson (2010-03-06):
1150# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1151
1152# From Glenn Eychaner (2011-03-02): [geychaner@mac.com]
1153# It appears that the Chilean government has decided to postpone the
1154# change from summer time to winter time again, by three weeks to April
1155# 2nd:
1156# http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651
1157#
1158# This is not yet reflected in the official "cambio de hora" site, but
1159# probably will be soon:
1160# http://www.horaoficial.cl/cambio.htm
1161
1162# From Arthur David Olson (2011-03-02):
1163# The emol.com article mentions a water shortage as the cause of the
1164# postponement, which may mean that it's not a permanent change.
1165
1166# From Glenn Eychaner (2011-03-28):
1167# The article:
1168# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1169#
1170# In English:
1171# Chile's clocks will go back an hour this year on the 7th of May instead
1172# of this Saturday. They will go forward again the 3rd Saturday in
1173# August, not in October as they have since 1968. This is a pilot plan
1174# which will be reevaluated in 2012.
1175
1176# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1177# As stated in the website of the Chilean Energy Ministry
1178# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1179# The Chilean Government has decided to postpone the entrance into winter time
1180# (to leave DST) from March 11 2012 to April 28th 2012. The decision has not
1181# been yet formalized but it will within the next days.
1182# Quote from the website communication:
1183#
1184# 6. For the year 2012, the dates of entry into winter time will be as follows:
1185# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1186# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1187# of the same day.
1188# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1189# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1190# 01:00 on September 2.
1191
1192# From Steffen Thorsen (2013-02-15):
1193# According to several news sources, Chile has extended DST this year,
1194# they will end DST later and start DST earlier than planned. They
1195# hope to save energy. The new end date is 2013-04-28 00:00 and new
1196# start date is 2013-09-08 00:00....
1197# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1198
1199# From Jos�� Miguel Garrido (2014-02-19):
1200# Today appeared in the Diario Oficial a decree amending the time change
1201# dates to 2014.
1202# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
1203# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
1204# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
1205
1206# NOTE: ChileAQ rules for Antarctic bases are stored separately in the
1207# 'antarctica' file.
1208
1209# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1210Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1211Rule Chile 1928 1932 - Apr 1 0:00 0 -
1212Rule Chile 1942 only - Jun 1 4:00u 0 -
1213Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1214Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1215Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1216Rule Chile 1947 only - Apr 1 4:00u 0 -
1217Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1218Rule Chile 1969 only - Mar 30 3:00u 0 -
1219Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1220Rule Chile 1970 only - Mar 29 3:00u 0 -
1221Rule Chile 1971 only - Mar 14 3:00u 0 -
1222Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1223Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1224Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1225Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1226Rule Chile 1987 only - Apr 12 3:00u 0 -
1227Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1228Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1229Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1230Rule Chile 1990 only - Mar 18 3:00u 0 -
1231Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1232Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1233Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1234Rule Chile 1997 only - Mar 30 3:00u 0 -
1235Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1236Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1237Rule Chile 1999 only - Apr 4 3:00u 0 -
1238Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
1239Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1240# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1241# which is used below in specifying the transition.
1242Rule Chile 2008 only - Mar 30 3:00u 0 -
1243Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1244Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1245Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1246Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1247Rule Chile 2012 max - Apr Sun>=23 3:00u 0 -
1248Rule Chile 2012 max - Sep Sun>=2 4:00u 1:00 S
1249# IATA SSIM anomalies: (1992-02) says 1992-03-14;
1250# (1996-09) says 1998-03-08. Ignore these.
1251# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1252Zone America/Santiago -4:42:46 - LMT 1890
1253 -4:42:46 - SMT 1910 # Santiago Mean Time
1254 -5:00 - CLT 1916 Jul 1 # Chile Time
1255 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1256 -4:00 - CLT 1919 Jul 1 # Chile Time
1257 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1258 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1259 -4:00 Chile CL%sT
1260Zone Pacific/Easter -7:17:44 - LMT 1890
1261 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1262 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1263 -6:00 Chile EAS%sT
1264#
1265# Salas y G��mez Island is uninhabited.
1266# Other Chilean locations, including Juan Fern��ndez Is, Desventuradas Is,
1267# and Antarctic bases, are like America/Santiago.
1268
1269# Colombia
1270
1271# Milne gives 4:56:16.4 for Bogot�� time in 1899; round to nearest. He writes,
1272# "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1273
1274# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1275Rule CO 1992 only - May 3 0:00 1:00 S
1276Rule CO 1993 only - Apr 4 0:00 0 -
1277# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1278Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1279 -4:56:16 - BMT 1914 Nov 23 # Bogot�� Mean Time
1280 -5:00 CO CO%sT # Colombia Time
1281# Malpelo, Providencia, San Andres
1282# no information; probably like America/Bogota
1283
1284# Cura��ao
1285
1286# Milne gives 4:35:46.9 for Cura��ao mean time; round to nearest.
1287#
1288# From Paul Eggert (2006-03-22):
1289# Shanks & Pottenger say that The Bottom and Philipsburg have been at
1290# -4:00 since standard time was introduced on 1912-03-02; and that
1291# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1292# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1293# Saba Island has been like Cura��ao.
1294# This all predates our 1970 cutoff, though.
1295#
1296# By July 2007 Cura��ao and St Maarten are planned to become
1297# associated states within the Netherlands, much like Aruba;
1298# Bonaire, Saba and St Eustatius would become directly part of the
1299# Netherlands as Kingdom Islands. This won't affect their time zones
1300# though, as far as we know.
1301#
1302# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1303Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
1304 -4:30 - ANT 1965 # Netherlands Antilles Time
1305 -4:00 - AST
1306
1307# From Arthur David Olson (2011-06-15):
1308# use links for places with new iso3166 codes.
1309# The name "Lower Prince's Quarter" is both longer than fourteen characters
1310# and contains an apostrophe; use "Lower_Princes" below.
1311
1312Link America/Curacao America/Lower_Princes # Sint Maarten
1313Link America/Curacao America/Kralendijk # Caribbean Netherlands
1314
1315# Ecuador
1316#
1317# Milne says the Central and South American Telegraph Company used -5:24:15.
1318#
1319# From Paul Eggert (2007-03-04):
1320# Apparently Ecuador had a failed experiment with DST in 1992.
1321# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1322# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1323# talk about "hora Sixto". Leave this alone for now, as we have no data.
1324#
1325# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1326Zone America/Guayaquil -5:19:20 - LMT 1890
1327 -5:14:00 - QMT 1931 # Quito Mean Time
1328 -5:00 - ECT # Ecuador Time
1329Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1330 -5:00 - ECT 1986
1331 -6:00 - GALT # Gal��pagos Time
1332
1333# Falklands
1334
1335# From Paul Eggert (2006-03-22):
1336# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1337# the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1338
1339# From Falkland Islands Government Office, London (2001-01-22)
1340# via Jesper N��rgaard:
1341# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1342# April 2001 and advance one hour to summer time at 2 am on Sunday 2
1343# September. It is anticipated that the clocks will revert back at 2
1344# am on Sunday 21 April 2002 and advance to summer time at 2 am on
1345# Sunday 1 September.
1346
1347# From Rives McDow (2001-02-13):
1348#
1349# I have communicated several times with people there, and the last
1350# time I had communications that was helpful was in 1998. Here is
1351# what was said then:
1352#
1353# "The general rule was that Stanley used daylight saving and the Camp
1354# did not. However for various reasons many people in the Camp have
1355# started to use daylight saving (known locally as 'Stanley Time')
1356# There is no rule as to who uses daylight saving - it is a matter of
1357# personal choice and so it is impossible to draw a map showing who
1358# uses it and who does not. Any list would be out of date as soon as
1359# it was produced. This year daylight saving ended on April 18/19th
1360# and started again on September 12/13th. I do not know what the rule
1361# is, but can find out if you like. We do not change at the same time
1362# as UK or Chile."
1363#
1364# I did have in my notes that the rule was "Second Saturday in Sep at
1365# 0:00 until third Saturday in Apr at 0:00". I think that this does
1366# not agree in some cases with Shanks; is this true?
1367#
1368# Also, there is no mention in the list that some areas in the
1369# Falklands do not use DST. I have found in my communications there
1370# that these areas are on the western half of East Falkland and all of
1371# West Falkland. Stanley is the only place that consistently observes
1372# DST. Again, as in other places in the world, the farmers don't like
1373# it. West Falkland is almost entirely sheep farmers.
1374#
1375# I know one lady there that keeps a list of which farm keeps DST and
1376# which doesn't each year. She runs a shop in Stanley, and says that
1377# the list changes each year. She uses it to communicate to her
1378# customers, catching them when they are home for lunch or dinner.
1379
1380# From Paul Eggert (2001-03-05):
1381# For now, we'll just record the time in Stanley, since we have no
1382# better info.
1383
1384# From Steffen Thorsen (2011-04-01):
1385# The Falkland Islands will not turn back clocks this winter, but stay on
1386# daylight saving time.
1387#
1388# One source:
1389# http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1390#
1391# We have gotten this confirmed by a clerk of the legislative assembly:
1392# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1393# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1394# hours) on the first Sunday of September at 0200hrs.
1395#
1396# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1397# will not revert to local mean time, but clocks will remain on Summer
1398# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1399# change to local time following the trial period will be notified.
1400#
1401# From Andrew Newman (2012-02-24)
1402# A letter from Justin McPhee, Chief Executive,
1403# Cable & Wireless Falkland Islands (dated 2012-02-22)
1404# states...
1405# The current Atlantic/Stanley entry under South America expects the
1406# clocks to go back to standard Falklands Time (FKT) on the 15th April.
1407# The database entry states that in 2011 Stanley was staying on fixed
1408# summer time on a trial basis only. FIG need to contact IANA and/or
1409# the maintainers of the database to inform them we're adopting
1410# the same policy this year and suggest recommendations for future years.
1411#
1412# For now we will assume permanent summer time for the Falklands
1413# until advised differently (to apply for 2012 and beyond, after the 2011
1414# experiment was apparently successful.)
1415# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1416Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1417Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1418Rule Falk 1939 only - Oct 1 0:00 1:00 S
1419Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1420Rule Falk 1943 only - Jan 1 0:00 0 -
1421Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1422Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1423Rule Falk 1984 only - Sep 16 0:00 1:00 S
1424Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1425Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1426Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1427Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1428# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1429Zone Atlantic/Stanley -3:51:24 - LMT 1890
1430 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1431 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1432 -3:00 Falk FK%sT 1985 Sep 15
1433 -4:00 Falk FK%sT 2010 Sep 5 02:00
1434 -3:00 - FKST
1435
1436# French Guiana
1437# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1438Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1439 -4:00 - GFT 1967 Oct # French Guiana Time
1440 -3:00 - GFT
1441
1442# Guyana
1443# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1444Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1445 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1446 -3:45 - GYT 1975 Jul 31 # Guyana Time
1447 -3:00 - GYT 1991
1448# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1449 -4:00 - GYT
1450
1451# Paraguay
1452#
1453# From Paul Eggert (2006-03-22):
1454# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
1455# and autumn transitions are 00:00 -> 23:00. Go with pre-1999
1456# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1457#
1458# From Waldemar Villamayor-Venialbo (2013-09-20):
1459# No time of the day is established for the adjustment, so people normally
1460# adjust their clocks at 0 hour of the given dates.
1461#
1462# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1463Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1464Rule Para 1975 1978 - Mar 1 0:00 0 -
1465Rule Para 1979 1991 - Apr 1 0:00 0 -
1466Rule Para 1989 only - Oct 22 0:00 1:00 S
1467Rule Para 1990 only - Oct 1 0:00 1:00 S
1468Rule Para 1991 only - Oct 6 0:00 1:00 S
1469Rule Para 1992 only - Mar 1 0:00 0 -
1470Rule Para 1992 only - Oct 5 0:00 1:00 S
1471Rule Para 1993 only - Mar 31 0:00 0 -
1472Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1473Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1474Rule Para 1996 only - Mar 1 0:00 0 -
1475# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1476# From Steffen Thorsen (2000-10-02):
1477# I have three independent reports that Paraguay changed to DST this Sunday
1478# (10-01).
1479#
1480# Translated by Gwillim Law (2001-02-27) from
1481# Noticias, a daily paper in Asunci��n, Paraguay (2000-10-01)
1482# <http://www.diarionoticias.com.py/011000/nacional/naciona1.htm>:
1483# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1484# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1485# system has been operating for several years. Formerly there was a separate
1486# decree each year; the new law has the same effect, but permanently. Every
1487# year, the time will change on the first Sunday of October; likewise, the
1488# clock will be set back on the first Sunday of March.
1489#
1490Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1491# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1492Rule Para 1997 only - Feb lastSun 0:00 0 -
1493# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1494# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1495Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1496# From Rives McDow (2002-02-28):
1497# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1498# dst method to be from the first Sunday in September to the first Sunday in
1499# April.
1500Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1501Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1502#
1503# From Jesper N��rgaard Welen (2005-01-02):
1504# There are several sources that claim that Paraguay made
1505# a timezone rule change in autumn 2004.
1506# From Steffen Thorsen (2005-01-05):
1507# Decree 1,867 (2004-03-05)
1508# From Carlos Ra��l Perasso via Jesper N��rgaard Welen (2006-10-13)
1509# <http://www.presidencia.gov.py/decretos/D1867.pdf>
1510Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1511Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1512# From Carlos Ra��l Perasso (2010-02-18):
1513# By decree number 3958 issued yesterday
1514# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1515# Paraguay changes its DST schedule, postponing the March rule to April and
1516# modifying the October date. The decree reads:
1517# ...
1518# Art. 1. It is hereby established that from the second Sunday of the month of
1519# April of this year (2010), the official time is to be set back 60 minutes,
1520# and that on the first Sunday of the month of October, it is to be set
1521# forward 60 minutes, in all the territory of the Paraguayan Republic.
1522# ...
1523Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1524Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1525#
1526# From Steffen Thorsen (2013-03-07):
1527# Paraguay will end DST on 2013-03-24 00:00....
1528# http://www.ande.gov.py/interna.php?id=1075
1529#
1530# From Carlos Ra��l Perasso (2013-03-15):
1531# The change in Paraguay is now final. Decree number 10780
1532# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1533# From Carlos Ra��l Perasso (2014-02-28):
1534# Decree 1264 can be found at:
1535# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
1536Rule Para 2013 max - Mar Sun>=22 0:00 0 -
1537
1538# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1539Zone America/Asuncion -3:50:40 - LMT 1890
1540 -3:50:40 - AMT 1931 Oct 10 # Asunci��n Mean Time
1541 -4:00 - PYT 1972 Oct # Paraguay Time
1542 -3:00 - PYT 1974 Apr
1543 -4:00 Para PY%sT
1544
1545# Peru
1546#
1547# From Evelyn C. Leeper via Mark Brader (2003-10-26)
1548# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1549# When we were in Peru in 1985-1986, they apparently switched over
1550# sometime between December 29 and January 3 while we were on the Amazon.
1551#
1552# From Paul Eggert (2006-03-22):
1553# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1554
1555# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1556Rule Peru 1938 only - Jan 1 0:00 1:00 S
1557Rule Peru 1938 only - Apr 1 0:00 0 -
1558Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1559Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1560Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1561Rule Peru 1986 1987 - Apr 1 0:00 0 -
1562Rule Peru 1990 only - Jan 1 0:00 1:00 S
1563Rule Peru 1990 only - Apr 1 0:00 0 -
1564# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1565Rule Peru 1994 only - Jan 1 0:00 1:00 S
1566Rule Peru 1994 only - Apr 1 0:00 0 -
1567# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1568Zone America/Lima -5:08:12 - LMT 1890
1569 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1570 -5:00 Peru PE%sT # Peru Time
1571
1572# South Georgia
1573# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1574Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1575 -2:00 - GST # South Georgia Time
1576
1577# South Sandwich Is
1578# uninhabited; scientific personnel have wintered
1579
1580# Suriname
1581# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1582Zone America/Paramaribo -3:40:40 - LMT 1911
1583 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1584 -3:40:36 - PMT 1945 Oct # The capital moved?
1585 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1586 -3:30 - SRT 1984 Oct # Suriname Time
1587 -3:00 - SRT
1588
1589# Trinidad and Tobago
1590# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1591Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1592 -4:00 - AST
1593
1594# These all agree with Trinidad and Tobago since 1970.
1595Link America/Port_of_Spain America/Anguilla
1596Link America/Port_of_Spain America/Dominica
1597Link America/Port_of_Spain America/Grenada
1598Link America/Port_of_Spain America/Guadeloupe
1599Link America/Port_of_Spain America/Marigot # St Martin (French part)
1600Link America/Port_of_Spain America/Montserrat
1601Link America/Port_of_Spain America/St_Barthelemy # St Barth��lemy
1602Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis
1603Link America/Port_of_Spain America/St_Lucia
1604Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US)
1605Link America/Port_of_Spain America/St_Vincent
1606Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
1607
1608# Uruguay
1609# From Paul Eggert (1993-11-18):
1610# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1611# From Shanks & Pottenger:
1612# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1613# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1614Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1615Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1616Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1617Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1618# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1619Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1620Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1621Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1622# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1623Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1624# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1625# and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
1626Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1627Rule Uruguay 1942 only - Jan 1 0:00 0 -
1628Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1629Rule Uruguay 1943 only - Mar 14 0:00 0 -
1630Rule Uruguay 1959 only - May 24 0:00 1:00 S
1631Rule Uruguay 1959 only - Nov 15 0:00 0 -
1632Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1633Rule Uruguay 1960 only - Mar 6 0:00 0 -
1634Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1635Rule Uruguay 1965 only - Sep 26 0:00 0 -
1636Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1637Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1638Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1639Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1640Rule Uruguay 1972 only - Aug 15 0:00 0 -
1641Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1642Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1643Rule Uruguay 1976 only - Oct 1 0:00 0 -
1644Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1645Rule Uruguay 1978 only - Apr 1 0:00 0 -
1646Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1647Rule Uruguay 1980 only - May 1 0:00 0 -
1648Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1649Rule Uruguay 1988 only - Mar 14 0:00 0 -
1650Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1651Rule Uruguay 1989 only - Mar 12 0:00 0 -
1652Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1653# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1654# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1655Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1656Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1657Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1658Rule Uruguay 1993 only - Feb 28 0:00 0 -
1659# From Eduardo Cota (2004-09-20):
1660# The uruguayan government has decreed a change in the local time....
1661# http://www.presidencia.gub.uy/decretos/2004091502.htm
1662Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1663# From Steffen Thorsen (2005-03-11):
1664# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1665# save energy ... it was postponed two weeks....
1666# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1667Rule Uruguay 2005 only - Mar 27 2:00 0 -
1668# From Eduardo Cota (2005-09-27):
1669# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1670# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1671# 02:00 local time, official time in Uruguay will be at GMT -2.
1672Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1673Rule Uruguay 2006 only - Mar 12 2:00 0 -
1674# From Jesper N��rgaard Welen (2006-09-06):
1675# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1676Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1677Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1678# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1679Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1680 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1681 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1682 -3:00 Uruguay UY%sT
1683
1684# Venezuela
1685#
1686# From John Stainforth (2007-11-28):
1687# ... the change for Venezuela originally expected for 2007-12-31 has
1688# been brought forward to 2007-12-09. The official announcement was
1689# published today in the "Gaceta Oficial de la Rep��blica Bolivariana
1690# de Venezuela, n��mero 38.819" (official document for all laws or
1691# resolution publication)
1692# http://www.globovision.com/news.php?nid=72208
1693
1694# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1695Zone America/Caracas -4:27:44 - LMT 1890
1696 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1697 -4:30 - VET 1965 # Venezuela Time
1698 -4:00 - VET 2007 Dec 9 03:00
1699 -4:30 - VET