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1# This file is in the public domain, so clarified as of
2# 2009-05-17 by Arthur David Olson.
3
4# This file 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). For more, please see
7# the file CONTRIBUTING in the tz distribution.
8
9# From Paul Eggert (2014-10-31):
9# From Paul Eggert (2016-12-05):
10#
11# Unless otherwise specified, the source for data through 1990 is:
12# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
13# San Diego: ACS Publications, Inc. (2003).
14# Unfortunately this book contains many errors and cites no sources.
15#
16# Gwillim Law writes that a good source
17# for recent time zone data is the International Air Transport
16# Many years ago Gwillim Law wrote that a good source
17# for time zone data was the International Air Transport
18# Association's Standard Schedules Information Manual (IATA SSIM),
19# published semiannually. Law sent in several helpful summaries
20# of the IATA's data after 1990. Except where otherwise noted,
21# IATA SSIM is the source for entries after 1990.
22#
23# For data circa 1899, a common source is:
24# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
25# http://www.jstor.org/stable/1774359
25# https://www.jstor.org/stable/1774359
26#
27# Earlier editions of these tables used the North American style (e.g. ARST and
28# ARDT for Argentine Standard and Daylight Time), but the following quote
29# suggests that it's better to use European style (e.g. ART and ARST).
30# I suggest the use of _Summer time_ instead of the more cumbersome
31# _daylight-saving time_. _Summer time_ seems to be in general use
32# in Europe and South America.
33# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
34# H L Mencken, _The American Language: Supplement I_ (1960), p 466
35#
36# Earlier editions of these tables also used the North American style
37# for time zones in Brazil, but this was incorrect, as Brazilians say
38# "summer time". Reinaldo Goulart, a S��o Paulo businessman active in
39# the railroad sector, writes (1999-07-06):
40# The subject of time zones is currently a matter of discussion/debate in
41# Brazil. Let's say that "the Bras��lia time" is considered the
42# "official time" because Bras��lia is the capital city.
43# The other three time zones are called "Bras��lia time "minus one" or
44# "plus one" or "plus two". As far as I know there is no such
45# name/designation as "Eastern Time" or "Central Time".
46# So I invented the following (English-language) abbreviations for now.
47# Corrections are welcome!
48# std dst
49# -2:00 FNT FNST Fernando de Noronha
50# -3:00 BRT BRST Bras��lia
51# -4:00 AMT AMST Amazon
52# -5:00 ACT ACST Acre
27# These tables use numeric abbreviations like -03 and -0330 for
28# integer hour and minute UTC offsets. Although earlier editions used
29# alphabetic time zone abbreviations, these abbreviations were
30# invented and did not reflect common practice.
31
32###############################################################################
33
34###############################################################################
35
36# Argentina
37
38# From Bob Devine (1988-01-28):
39# Argentina: first Sunday in October to first Sunday in April since 1976.
40# Double Summer time from 1969 to 1974. Switches at midnight.
41
42# From U. S. Naval Observatory (1988-01-19):
43# ARGENTINA 3 H BEHIND UTC
44
45# From Hernan G. Otero (1995-06-26):
46# I am sending modifications to the Argentine time zone table...
47# AR was chosen because they are the ISO letters that represent Argentina.
48
49# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
50Rule Arg 1930 only - Dec 1 0:00 1:00 S
51Rule Arg 1931 only - Apr 1 0:00 0 -
52Rule Arg 1931 only - Oct 15 0:00 1:00 S
53Rule Arg 1932 1940 - Mar 1 0:00 0 -
54Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
55Rule Arg 1940 only - Jul 1 0:00 1:00 S
56Rule Arg 1941 only - Jun 15 0:00 0 -
57Rule Arg 1941 only - Oct 15 0:00 1:00 S
58Rule Arg 1943 only - Aug 1 0:00 0 -
59Rule Arg 1943 only - Oct 15 0:00 1:00 S
60Rule Arg 1946 only - Mar 1 0:00 0 -
61Rule Arg 1946 only - Oct 1 0:00 1:00 S
62Rule Arg 1963 only - Oct 1 0:00 0 -
63Rule Arg 1963 only - Dec 15 0:00 1:00 S
64Rule Arg 1964 1966 - Mar 1 0:00 0 -
65Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
66Rule Arg 1967 only - Apr 2 0:00 0 -
67Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
68Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
69Rule Arg 1974 only - Jan 23 0:00 1:00 S
70Rule Arg 1974 only - May 1 0:00 0 -
71Rule Arg 1988 only - Dec 1 0:00 1:00 S
72#
73# From Hernan G. Otero (1995-06-26):
74# These corrections were contributed by InterSoft Argentina S.A.,
75# obtaining the data from the:
76# Talleres de Hidrograf��a Naval Argentina
77# (Argentine Naval Hydrography Institute)
78Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
79Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
80#
81# From Hernan G. Otero (1995-06-26):
82# From this moment on, the law that mandated the daylight saving
83# time corrections was derogated and no more modifications
84# to the time zones (for daylight saving) are now made.
85#
86# From Rives McDow (2000-01-10):
87# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
88# which did not result in the switch of a time zone, as they stayed 9 hours
89# from the International Date Line.
90Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
91# From Paul Eggert (2007-12-28):
92# DST was set to expire on March 5, not March 3, but since it was converted
93# to standard time on March 3 it's more convenient for us to pretend that
94# it ended on March 3.
95Rule Arg 2000 only - Mar 3 0:00 0 -
96#
97# From Peter Gradelski via Steffen Thorsen (2000-03-01):
98# We just checked with our S��o Paulo office and they say the government of
99# Argentina decided not to become one of the countries that go on or off DST.
100# So Buenos Aires should be -3 hours from GMT at all times.
101#
102# From Fabi��n L. Arce Jofr�� (2000-04-04):
103# The law that claimed DST for Argentina was derogated by President Fernando
104# de la R��a on March 2, 2000, because it would make people spend more energy
105# in the winter time, rather than less. The change took effect on March 3.
106#
107# From Mariano Absatz (2001-06-06):
108# one of the major newspapers here in Argentina said that the 1999
109# Timezone Law (which never was effectively applied) will (would?) be
110# in effect.... The article is at
111# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
112# ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted
113# 1999-09-17, and published 1999-09-21. The official publication is at:
114# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
115# Regretfully, you have to subscribe (and pay) for the on-line version....
116#
117# (2001-06-12):
118# the timezone for Argentina will not change next Sunday.
119# Apparently it will do so on Sunday 24th....
120# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
121#
122# (2001-06-25):
123# Last Friday (yes, the last working day before the date of the change), the
124# Senate annulled the 1999 law that introduced the changes later postponed.
125# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
126# It remains the vote of the Deputies..., but it will be the same....
127# This kind of things had always been done this way in Argentina.
128# We are still -03:00 all year round in all of the country.
129#
130# From Steffen Thorsen (2007-12-21):
131# A user (Leonardo Chaim) reported that Argentina will adopt DST....
132# all of the country (all Zone-entries) are affected. News reports like
133# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
134# that Argentina will use DST next year as well, from October to
135# March, although exact rules are not given.
136#
137# From Jesper N��rgaard Welen (2007-12-26)
138# The last hurdle of Argentina DST is over, the proposal was approved in
139# the lower chamber too (Diputados) with a vote 192 for and 2 against.
140# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
141# the original scanned proposal, where the dates and the zero hours are
142# clear and unambiguous...This is the article about final approval:
143# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
144#
145# From Paul Eggert (2007-12-22):
146# For dates after mid-2008, the following rules are my guesses and
147# are quite possibly wrong, but are more likely than no DST at all.
148
149# From Alexander Krivenyshev (2008-09-05):
150# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
151# Argentina will start DST on Sunday October 19, 2008.
152#
153# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
154# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
155
156# From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07)
157# via Rodrigo Severo:
158# Argentinian law No. 25.155 is no longer valid.
159# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
160# The new one is law No. 26.350
161# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
162# So there is no summer time in Argentina for now.
163
164# From Mariano Absatz (2008-10-20):
165# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST
166# in Argentina from 2008-10-19 until 2009-03-15.
167# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
168#
169
170# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
171# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
172# Pampa, Neuqu��n, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
173# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
174#
175# Press release 235 dated Saturday October 18th, from the Government of the
176# Province of Jujuy saying it will not apply DST either (even when it was not
177# included in Decree 1705/2008).
178# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
179
180# From fullinet (2009-10-18):
181# As announced in
182# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
183# (an official .gob.ar) under title: "Sin Cambio de Hora"
184# (English: "No hour change").
185#
186# "Por el momento, el Gobierno Nacional resolvi�� no modificar la hora
187# oficial, decisi��n que estaba en estudio para su implementaci��n el
188# domingo 18 de octubre. Desde el Ministerio de Planificaci��n se anunci��
189# que la Argentina hoy, en estas condiciones meteorol��gicas, no necesita
190# la modificaci��n del huso horario, ya que 2009 nos encuentra con
191# crecimiento en la producci��n y distribuci��n energ��tica."
192
193Rule Arg 2007 only - Dec 30 0:00 1:00 S
194Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
195Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
196
197# From Mariano Absatz (2004-05-21):
198# Today it was officially published that the Province of Mendoza is changing
199# its timezone this winter... starting tomorrow night....
200# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
201# From Paul Eggert (2004-05-24):
202# It's Law No. 7,210. This change is due to a public power emergency, so for
203# now we'll assume it's for this year only.
204#
205# From Paul Eggert (2014-08-09):
206# Hora de verano para la Rep��blica Argentina
207# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
208# says that standard time in Argentina from 1894-10-31
209# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
210# over Shanks & Pottenger.
211#
212# From Mariano Absatz (2004-06-05):
213# These media articles from a major newspaper mostly cover the current state:
214# http://www.lanacion.com.ar/04/05/27/de_604825.asp
215# http://www.lanacion.com.ar/04/05/28/de_605203.asp
216#
217# The following eight (8) provinces pulled clocks back to UTC-04:00 at
218# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
219# Apparently, all nine provinces would go back to UTC-03:00 at the same
220# time in October 17th.
221#
222# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
223# Tierra del Fuego, Tucum��n.
224#
225# From Mariano Absatz (2004-06-14):
226# ... this weekend, the Province of Tucum��n decided it'd go back to UTC-03:00
227# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
228# annoyance with the change is much higher than the power savings obtained....
229#
230# From Gwillim Law (2004-06-14):
231# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
232# "The time change in Tierra del Fuego was a conflicted decision from
233# the start. The government had decreed that the measure would take
234# effect on June 1, but a normative error forced the new time to begin
235# three days earlier, from a Saturday to a Sunday....
236# Our understanding was that the change was originally scheduled to take place
237# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
238# provinces). Sunday was May 30, only two days earlier. So the article
239# contains a contradiction. I would give more credence to the Saturday/Sunday
240# date than the "three days earlier" phrase, and conclude that Tierra del
241# Fuego set its clocks back at 2004-05-30 00:00.
242#
243# From Steffen Thorsen (2004-10-05):
244# The previous law 7210 which changed the province of Mendoza's time zone
245# back in May have been modified slightly in a new law 7277, which set the
246# new end date to 2004-09-26 (original date was 2004-10-17).
247# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
248#
249# From Mariano Absatz (2004-10-05):
250# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
251# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
252# at midnight between Saturday, July 24th and Sunday, July 25th....
253# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
254# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
255# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
256
257# From Alex Krivenyshev (2008-01-17):
258# Here are articles that Argentina Province San Luis is planning to end DST
259# as earlier as upcoming Monday January 21, 2008 or February 2008:
260#
261# Provincia argentina retrasa reloj y marca diferencia con resto del pa��s
262# (Argentine Province delayed clock and mark difference with the rest of the
263# country)
264# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
265#
266# Es inminente que en San Luis atrasen una hora los relojes
267# (It is imminent in San Luis clocks one hour delay)
290# http://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
291# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
268# https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
269# http://www.worldtimezone.com/dst_news/dst_news_argentina02.html
270
271# From Jesper N��rgaard Welen (2008-01-18):
272# The page of the San Luis provincial government
273# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
274# confirms what Alex Krivenyshev has earlier sent to the tz
275# emailing list about that San Luis plans to return to standard
276# time much earlier than the rest of the country. It also
277# confirms that upon request the provinces San Juan and Mendoza
278# refused to follow San Luis in this change.
279#
280# The change is supposed to take place Monday the 21st at 0:00
281# hours. As far as I understand it if this goes ahead, we need
282# a new timezone for San Luis (although there are also documented
283# independent changes in the southamerica file of San Luis in
284# 1990 and 1991 which has not been confirmed).
285
286# From Jesper N��rgaard Welen (2008-01-25):
287# Unfortunately the below page has become defunct, about the San Luis
288# time change. Perhaps because it now is part of a group of pages "Most
289# important pages of 2008."
290#
291# You can use
292# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
293# instead it seems. Or use "Buscador" from the main page of the San Luis
294# government, and fill in "huso" and click OK, and you will get 3 pages
295# from which the first one is identical to the above.
296
297# From Mariano Absatz (2008-01-28):
298# I can confirm that the Province of San Luis (and so far only that
299# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
300# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
301# 1 hour), and they intend to keep UTC-3 as their timezone all year round
302# (that is, unless they change their mind any minute now).
303#
304# So we'll have to add yet another city to 'southamerica' (I think San
305# Luis city is the mos populated city in the Province, so it'd be
306# America/Argentina/San_Luis... of course I can't remember if San Luis's
307# history of particular changes goes along with Mendoza or San Juan :-(
308# (I only remember not being able to collect hard facts about San Luis
309# back in 2004, when these provinces changed to UTC-4 for a few days, I
310# mailed them personally and never got an answer).
311
312# From Paul Eggert (2014-08-12):
313# Unless otherwise specified, data entries are from Shanks & Pottenger through
314# 1992, from the IATA otherwise. As noted below, Shanks & Pottenger say that
315# America/Cordoba split into 6 subregions during 1991/1992, one of which
316# was America/San_Luis, but we haven't verified this yet so for now we'll
317# keep America/Cordoba a single region rather than splitting it into the
318# other 5 subregions.
319
320# From Mariano Absatz (2009-03-13):
321# Yesterday (with our usual 2-day notice) the Province of San Luis
322# decided that next Sunday instead of "staying" @utc-03:00 they will go
323# to utc-04:00 until the second Saturday in October...
324#
325# The press release is at
326# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
327# (I couldn't find the decree, but www.sanluis.gov.ar
328# is the official page for the Province Government.)
329#
330# There's also a note in only one of the major national papers ...
331# http://www.lanacion.com.ar/nota.asp?nota_id=1107912
332#
333# The press release says [quick and dirty translation]:
334# ... announced that next Sunday, at 00:00, Puntanos (the San Luis
335# inhabitants) will have to turn back one hour their clocks
336#
337# Since then, San Luis will establish its own Province timezone. Thus,
338# during 2009, this timezone change will run from 00:00 the third Sunday
339# in March until 24:00 of the second Saturday in October.
340
341# From Mariano Absatz (2009-10-16):
342# ...the Province of San Luis is a case in itself.
343#
344# The Law at
345# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
346# is ambiguous because establishes a calendar from the 2nd Sunday in
347# October at 0:00 thru the 2nd Saturday in March at 24:00 and the
348# complement of that starting on the 2nd Sunday of March at 0:00 and
349# ending on the 2nd Saturday of March at 24:00.
350#
351# This clearly breaks every time the 1st of March or October is a Sunday.
352#
353# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
354# Sunday of October and March.
355#
356# The problem is that the changes in the rest of the Provinces that did
357# change in 2007/2008, were made according to the Federal Law and Decrees
358# that did so on the 3rd Sunday of October and March.
359#
360# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
361# (October 11th) at 0:00.
362#
363# So I guess a new set of rules, besides "Arg", must be made and the last
364# America/Argentina/San_Luis entries should change to use these...
387#
388# I'm enclosing a patch that does what I say... regretfully, the San Luis
389# timezone must be called "WART/WARST" even when most of the time (like,
390# right now) WARST == ART... that is, since last Sunday, all the country
391# is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
392# of the country calls it "ART".
365# ...
366
367# From Alexander Krivenyshev (2010-04-09):
368# According to news reports from El Diario de la Rep��blica Province San
369# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
370# after April 11, 2010 - will continue to have same time as rest of
371# Argentina (UTC-3) (no DST).
372#
373# Confirmaron la pr��rroga del huso horario de verano (Spanish)
374# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
375# or (some English translation):
376# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
377
378# From Mariano Absatz (2010-04-12):
379# yes...I can confirm this...and given that San Luis keeps calling
380# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
381# rules...San Luis is still using "Western ARgentina Time" and it got
382# stuck on Summer daylight savings time even though the summer is over.
383
384# From Paul Eggert (2013-09-05):
385# Perhaps San Luis operates on the legal fiction that it is at -04
386# with perpetual summer time, but ordinary usage typically seems to
387# just say it's at -03; see, for example,
416# http://es.wikipedia.org/wiki/Hora_oficial_argentina
388# https://es.wikipedia.org/wiki/Hora_oficial_argentina
389# We've documented similar situations as being plain changes to
390# standard time, so let's do that here too. This does not change UTC
391# offsets, only tm_isdst and the time zone abbreviations. One minor
392# plus is that this silences a zic complaint that there's no POSIX TZ
393# setting for time stamps past 2038.
394
395# From Paul Eggert (2013-02-21):
396# Milne says C��rdoba time was -4:16:48.2. Round to the nearest second.
397
398# Zone NAME GMTOFF RULES FORMAT [UNTIL]
399#
400# Buenos Aires (BA), Capital Federal (CF),
401Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
402 -4:16:48 - CMT 1920 May # C��rdoba Mean Time
431 -4:00 - ART 1930 Dec
432 -4:00 Arg AR%sT 1969 Oct 5
433 -3:00 Arg AR%sT 1999 Oct 3
434 -4:00 Arg AR%sT 2000 Mar 3
435 -3:00 Arg AR%sT
403 -4:00 - -04 1930 Dec
404 -4:00 Arg -04/-03 1969 Oct 5
405 -3:00 Arg -03/-02 1999 Oct 3
406 -4:00 Arg -04/-03 2000 Mar 3
407 -3:00 Arg -03/-02
408#
409# C��rdoba (CB), Santa Fe (SF), Entre R��os (ER), Corrientes (CN), Misiones (MN),
410# Chaco (CC), Formosa (FM), Santiago del Estero (SE)
411#
412# Shanks & Pottenger also make the following claims, which we haven't verified:
413# - Formosa switched to -3:00 on 1991-01-07.
414# - Misiones switched to -3:00 on 1990-12-29.
415# - Chaco switched to -3:00 on 1991-01-04.
416# - Santiago del Estero switched to -4:00 on 1991-04-01,
417# then to -3:00 on 1991-04-26.
418#
419Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
420 -4:16:48 - CMT 1920 May
449 -4:00 - ART 1930 Dec
450 -4:00 Arg AR%sT 1969 Oct 5
451 -3:00 Arg AR%sT 1991 Mar 3
452 -4:00 - WART 1991 Oct 20
453 -3:00 Arg AR%sT 1999 Oct 3
454 -4:00 Arg AR%sT 2000 Mar 3
455 -3:00 Arg AR%sT
421 -4:00 - -04 1930 Dec
422 -4:00 Arg -04/-03 1969 Oct 5
423 -3:00 Arg -03/-02 1991 Mar 3
424 -4:00 - -04 1991 Oct 20
425 -3:00 Arg -03/-02 1999 Oct 3
426 -4:00 Arg -04/-03 2000 Mar 3
427 -3:00 Arg -03/-02
428#
429# Salta (SA), La Pampa (LP), Neuqu��n (NQ), Rio Negro (RN)
430Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
431 -4:16:48 - CMT 1920 May
460 -4:00 - ART 1930 Dec
461 -4:00 Arg AR%sT 1969 Oct 5
462 -3:00 Arg AR%sT 1991 Mar 3
463 -4:00 - WART 1991 Oct 20
464 -3:00 Arg AR%sT 1999 Oct 3
465 -4:00 Arg AR%sT 2000 Mar 3
466 -3:00 Arg AR%sT 2008 Oct 18
467 -3:00 - ART
432 -4:00 - -04 1930 Dec
433 -4:00 Arg -04/-03 1969 Oct 5
434 -3:00 Arg -03/-02 1991 Mar 3
435 -4:00 - -04 1991 Oct 20
436 -3:00 Arg -03/-02 1999 Oct 3
437 -4:00 Arg -04/-03 2000 Mar 3
438 -3:00 Arg -03/-02 2008 Oct 18
439 -3:00 - -03
440#
441# Tucum��n (TM)
442Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
443 -4:16:48 - CMT 1920 May
472 -4:00 - ART 1930 Dec
473 -4:00 Arg AR%sT 1969 Oct 5
474 -3:00 Arg AR%sT 1991 Mar 3
475 -4:00 - WART 1991 Oct 20
476 -3:00 Arg AR%sT 1999 Oct 3
477 -4:00 Arg AR%sT 2000 Mar 3
478 -3:00 - ART 2004 Jun 1
479 -4:00 - WART 2004 Jun 13
480 -3:00 Arg AR%sT
444 -4:00 - -04 1930 Dec
445 -4:00 Arg -04/-03 1969 Oct 5
446 -3:00 Arg -03/-02 1991 Mar 3
447 -4:00 - -04 1991 Oct 20
448 -3:00 Arg -03/-02 1999 Oct 3
449 -4:00 Arg -04/-03 2000 Mar 3
450 -3:00 - -03 2004 Jun 1
451 -4:00 - -04 2004 Jun 13
452 -3:00 Arg -03/-02
453#
454# La Rioja (LR)
455Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
456 -4:16:48 - CMT 1920 May
485 -4:00 - ART 1930 Dec
486 -4:00 Arg AR%sT 1969 Oct 5
487 -3:00 Arg AR%sT 1991 Mar 1
488 -4:00 - WART 1991 May 7
489 -3:00 Arg AR%sT 1999 Oct 3
490 -4:00 Arg AR%sT 2000 Mar 3
491 -3:00 - ART 2004 Jun 1
492 -4:00 - WART 2004 Jun 20
493 -3:00 Arg AR%sT 2008 Oct 18
494 -3:00 - ART
457 -4:00 - -04 1930 Dec
458 -4:00 Arg -04/-03 1969 Oct 5
459 -3:00 Arg -03/-02 1991 Mar 1
460 -4:00 - -04 1991 May 7
461 -3:00 Arg -03/-02 1999 Oct 3
462 -4:00 Arg -04/-03 2000 Mar 3
463 -3:00 - -03 2004 Jun 1
464 -4:00 - -04 2004 Jun 20
465 -3:00 Arg -03/-02 2008 Oct 18
466 -3:00 - -03
467#
468# San Juan (SJ)
469Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
470 -4:16:48 - CMT 1920 May
499 -4:00 - ART 1930 Dec
500 -4:00 Arg AR%sT 1969 Oct 5
501 -3:00 Arg AR%sT 1991 Mar 1
502 -4:00 - WART 1991 May 7
503 -3:00 Arg AR%sT 1999 Oct 3
504 -4:00 Arg AR%sT 2000 Mar 3
505 -3:00 - ART 2004 May 31
506 -4:00 - WART 2004 Jul 25
507 -3:00 Arg AR%sT 2008 Oct 18
508 -3:00 - ART
471 -4:00 - -04 1930 Dec
472 -4:00 Arg -04/-03 1969 Oct 5
473 -3:00 Arg -03/-02 1991 Mar 1
474 -4:00 - -04 1991 May 7
475 -3:00 Arg -03/-02 1999 Oct 3
476 -4:00 Arg -04/-03 2000 Mar 3
477 -3:00 - -03 2004 May 31
478 -4:00 - -04 2004 Jul 25
479 -3:00 Arg -03/-02 2008 Oct 18
480 -3:00 - -03
481#
482# Jujuy (JY)
483Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
484 -4:16:48 - CMT 1920 May
513 -4:00 - ART 1930 Dec
514 -4:00 Arg AR%sT 1969 Oct 5
515 -3:00 Arg AR%sT 1990 Mar 4
516 -4:00 - WART 1990 Oct 28
517 -4:00 1:00 WARST 1991 Mar 17
518 -4:00 - WART 1991 Oct 6
519 -3:00 1:00 ARST 1992
520 -3:00 Arg AR%sT 1999 Oct 3
521 -4:00 Arg AR%sT 2000 Mar 3
522 -3:00 Arg AR%sT 2008 Oct 18
523 -3:00 - ART
485 -4:00 - -04 1930 Dec
486 -4:00 Arg -04/-03 1969 Oct 5
487 -3:00 Arg -03/-02 1990 Mar 4
488 -4:00 - -04 1990 Oct 28
489 -4:00 1:00 -03 1991 Mar 17
490 -4:00 - -04 1991 Oct 6
491 -3:00 1:00 -02 1992
492 -3:00 Arg -03/-02 1999 Oct 3
493 -4:00 Arg -04/-03 2000 Mar 3
494 -3:00 Arg -03/-02 2008 Oct 18
495 -3:00 - -03
496#
497# Catamarca (CT), Chubut (CH)
498Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
499 -4:16:48 - CMT 1920 May
528 -4:00 - ART 1930 Dec
529 -4:00 Arg AR%sT 1969 Oct 5
530 -3:00 Arg AR%sT 1991 Mar 3
531 -4:00 - WART 1991 Oct 20
532 -3:00 Arg AR%sT 1999 Oct 3
533 -4:00 Arg AR%sT 2000 Mar 3
534 -3:00 - ART 2004 Jun 1
535 -4:00 - WART 2004 Jun 20
536 -3:00 Arg AR%sT 2008 Oct 18
537 -3:00 - ART
500 -4:00 - -04 1930 Dec
501 -4:00 Arg -04/-03 1969 Oct 5
502 -3:00 Arg -03/-02 1991 Mar 3
503 -4:00 - -04 1991 Oct 20
504 -3:00 Arg -03/-02 1999 Oct 3
505 -4:00 Arg -04/-03 2000 Mar 3
506 -3:00 - -03 2004 Jun 1
507 -4:00 - -04 2004 Jun 20
508 -3:00 Arg -03/-02 2008 Oct 18
509 -3:00 - -03
510#
511# Mendoza (MZ)
512Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
513 -4:16:48 - CMT 1920 May
542 -4:00 - ART 1930 Dec
543 -4:00 Arg AR%sT 1969 Oct 5
544 -3:00 Arg AR%sT 1990 Mar 4
545 -4:00 - WART 1990 Oct 15
546 -4:00 1:00 WARST 1991 Mar 1
547 -4:00 - WART 1991 Oct 15
548 -4:00 1:00 WARST 1992 Mar 1
549 -4:00 - WART 1992 Oct 18
550 -3:00 Arg AR%sT 1999 Oct 3
551 -4:00 Arg AR%sT 2000 Mar 3
552 -3:00 - ART 2004 May 23
553 -4:00 - WART 2004 Sep 26
554 -3:00 Arg AR%sT 2008 Oct 18
555 -3:00 - ART
514 -4:00 - -04 1930 Dec
515 -4:00 Arg -04/-03 1969 Oct 5
516 -3:00 Arg -03/-02 1990 Mar 4
517 -4:00 - -04 1990 Oct 15
518 -4:00 1:00 -03 1991 Mar 1
519 -4:00 - -04 1991 Oct 15
520 -4:00 1:00 -03 1992 Mar 1
521 -4:00 - -04 1992 Oct 18
522 -3:00 Arg -03/-02 1999 Oct 3
523 -4:00 Arg -04/-03 2000 Mar 3
524 -3:00 - -03 2004 May 23
525 -4:00 - -04 2004 Sep 26
526 -3:00 Arg -03/-02 2008 Oct 18
527 -3:00 - -03
528#
529# San Luis (SL)
530
531Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
532Rule SanLuis 2007 2008 - Oct Sun>=8 0:00 1:00 S
533
534Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
535 -4:16:48 - CMT 1920 May
564 -4:00 - ART 1930 Dec
565 -4:00 Arg AR%sT 1969 Oct 5
566 -3:00 Arg AR%sT 1990
567 -3:00 1:00 ARST 1990 Mar 14
568 -4:00 - WART 1990 Oct 15
569 -4:00 1:00 WARST 1991 Mar 1
570 -4:00 - WART 1991 Jun 1
571 -3:00 - ART 1999 Oct 3
572 -4:00 1:00 WARST 2000 Mar 3
573 -3:00 - ART 2004 May 31
574 -4:00 - WART 2004 Jul 25
575 -3:00 Arg AR%sT 2008 Jan 21
576 -4:00 SanLuis WAR%sT 2009 Oct 11
577 -3:00 - ART
536 -4:00 - -04 1930 Dec
537 -4:00 Arg -04/-03 1969 Oct 5
538 -3:00 Arg -03/-02 1990
539 -3:00 1:00 -02 1990 Mar 14
540 -4:00 - -04 1990 Oct 15
541 -4:00 1:00 -03 1991 Mar 1
542 -4:00 - -04 1991 Jun 1
543 -3:00 - -03 1999 Oct 3
544 -4:00 1:00 -03 2000 Mar 3
545 -3:00 - -03 2004 May 31
546 -4:00 - -04 2004 Jul 25
547 -3:00 Arg -03/-02 2008 Jan 21
548 -4:00 SanLuis -04/-03 2009 Oct 11
549 -3:00 - -03
550#
551# Santa Cruz (SC)
552Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
581 -4:16:48 - CMT 1920 May # C��rdoba Mean Time
582 -4:00 - ART 1930 Dec
583 -4:00 Arg AR%sT 1969 Oct 5
584 -3:00 Arg AR%sT 1999 Oct 3
585 -4:00 Arg AR%sT 2000 Mar 3
586 -3:00 - ART 2004 Jun 1
587 -4:00 - WART 2004 Jun 20
588 -3:00 Arg AR%sT 2008 Oct 18
589 -3:00 - ART
553 -4:16:48 - CMT 1920 May
554 -4:00 - -04 1930 Dec
555 -4:00 Arg -04/-03 1969 Oct 5
556 -3:00 Arg -03/-02 1999 Oct 3
557 -4:00 Arg -04/-03 2000 Mar 3
558 -3:00 - -03 2004 Jun 1
559 -4:00 - -04 2004 Jun 20
560 -3:00 Arg -03/-02 2008 Oct 18
561 -3:00 - -03
562#
563# Tierra del Fuego, Ant��rtida e Islas del Atl��ntico Sur (TF)
564Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
593 -4:16:48 - CMT 1920 May # C��rdoba Mean Time
594 -4:00 - ART 1930 Dec
595 -4:00 Arg AR%sT 1969 Oct 5
596 -3:00 Arg AR%sT 1999 Oct 3
597 -4:00 Arg AR%sT 2000 Mar 3
598 -3:00 - ART 2004 May 30
599 -4:00 - WART 2004 Jun 20
600 -3:00 Arg AR%sT 2008 Oct 18
601 -3:00 - ART
565 -4:16:48 - CMT 1920 May
566 -4:00 - -04 1930 Dec
567 -4:00 Arg -04/-03 1969 Oct 5
568 -3:00 Arg -03/-02 1999 Oct 3
569 -4:00 Arg -04/-03 2000 Mar 3
570 -3:00 - -03 2004 May 30
571 -4:00 - -04 2004 Jun 20
572 -3:00 Arg -03/-02 2008 Oct 18
573 -3:00 - -03
574
575# Aruba
576Link America/Curacao America/Aruba
577
578# Bolivia
579# Zone NAME GMTOFF RULES FORMAT [UNTIL]
580Zone America/La_Paz -4:32:36 - LMT 1890
581 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
582 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
611 -4:00 - BOT # Bolivia Time
583 -4:00 - -04
584
585# Brazil
586
587# From Paul Eggert (1993-11-18):
588# The mayor of Rio recently attempted to change the time zone rules
589# just in his city, in order to leave more summer time for the tourist trade.
590# The rule change lasted only part of the day;
591# the federal government refused to follow the city's rules, and business
592# was in a chaos, so the mayor backed down that afternoon.
593
594# From IATA SSIM (1996-02):
595# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
596# Santa Catarina (SC), Paran�� (PR), S��o Paulo (SP), Rio de Janeiro (RJ),
597# Esp��rito Santo (ES), Minas Gerais (MG), Bahia (BA), Goi��s (GO),
598# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
599# [The last three states are new to this issue of the IATA SSIM.]
600
601# From Gwillim Law (1996-10-07):
602# Geography, history (Tocantins was part of Goi��s until 1989), and other
603# sources of time zone information lead me to believe that AL, SE, and TO were
604# always in BR1, and so the only change was whether or not they observed DST....
605# The earliest issue of the SSIM I have is 2/91. Each issue from then until
606# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
607# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
608# (UTC-4).... The other two time zones given for Brazil are BR3, which is
609# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
610# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
611# become part of the state of Pernambuco). The boundary between BR1 and BR2
612# has never been clearly stated. They've simply been called East and West.
613# However, some conclusions can be drawn from another IATA manual: the Airline
614# Coding Directory, which lists close to 400 airports in Brazil. For each
615# airport it gives a time zone which is coded to the SSIM. From that
616# information, I'm led to conclude that the states of Amap�� (AP), Cear�� (CE),
617# Maranh��o (MA), Para��ba (PR), Pernambuco (PE), Piau�� (PI), and Rio Grande do
618# Norte (RN), and the eastern part of Par�� (PA) are all in BR1 without DST.
619
620# From Marcos Tadeu (1998-09-27):
621# Brazilian official page <http://pcdsh01.on.br/verao1.html>
622
623# From Jesper N��rgaard (2000-11-03):
624# [For an official list of which regions in Brazil use which time zones, see:]
625# http://pcdsh01.on.br/Fusbr.htm
626# http://pcdsh01.on.br/Fusbrhv.htm
627
628# From Celso Doria via David Madeo (2002-10-09):
629# The reason for the delay this year has to do with elections in Brazil.
630#
631# Unlike in the United States, elections in Brazil are 100% computerized and
632# the results are known almost immediately. Yesterday, it was the first
633# round of the elections when 115 million Brazilians voted for President,
634# Governor, Senators, Federal Deputies, and State Deputies. Nobody is
635# counting (or re-counting) votes anymore and we know there will be a second
636# round for the Presidency and also for some Governors. The 2nd round will
637# take place on October 27th.
638#
639# The reason why the DST will only begin November 3rd is that the thousands
640# of electoral machines used cannot have their time changed, and since the
641# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
642# the Government decided to postpone DST, instead of changing the Constitution
643# (maybe, for the next elections, it will be possible to change the clock)...
644
645# From Rodrigo Severo (2004-10-04):
646# It's just the biannual change made necessary by the much hyped, supposedly
647# modern Brazilian eletronic voting machines which, apparently, can't deal
648# with a time change between the first and the second rounds of the elections.
649
650# From Steffen Thorsen (2007-09-20):
651# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
652# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
653
654# From Paul Schulze (2008-06-24):
655# ...by law number 11.662 of April 24, 2008 (published in the "Diario
656# Oficial da Uni��o"...) in Brazil there are changes in the timezones,
657# effective today (00:00am at June 24, 2008) as follows:
658#
659# a) The timezone UTC+5 is extinguished, with all the Acre state and the
660# part of the Amazonas state that had this timezone now being put to the
661# timezone UTC+4
662# b) The whole Par�� state now is put at timezone UTC+3, instead of just
663# part of it, as was before.
664#
665# This change follows a proposal of senator Tiao Viana of Acre state, that
666# proposed it due to concerns about open television channels displaying
667# programs inappropriate to youths in the states that had the timezone
668# UTC+5 too early in the night. In the occasion, some more corrections
669# were proposed, trying to unify the timezones of any given state. This
670# change modifies timezone rules defined in decree 2.784 of 18 June,
671# 1913.
672
673# From Rodrigo Severo (2008-06-24):
674# Just correcting the URL:
675# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
676#
677# As a result of the above Decree I believe the America/Rio_Branco
678# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
679# be created to represent the...west side of the Par�� State. I
680# suggest this new timezone be called Santarem as the most
681# important/populated city in the affected area.
682#
683# This new timezone would be the same as the Rio_Branco timezone up to
684# the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
685
686# From Alex Krivenyshev (2008-06-24):
687# This is a quick reference page for New and Old Brazil Time Zones map.
688# http://www.worldtimezone.com/brazil-time-new-old.php
689#
690# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
691# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
692# part of Par state is moving to one timezone UTC-03 (from UTC-04).
693
694# From Paul Eggert (2002-10-10):
695# The official decrees referenced below are mostly taken from
696# Decretos sobre o Hor��rio de Ver��o no Brasil.
697# http://pcdsh01.on.br/DecHV.html
698
699# From Steffen Thorsen (2008-08-29):
700# As announced by the government and many newspapers in Brazil late
701# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
702# it will end on 2009-02-15 (current rule for Brazil is fine). Based on
703# past years experience with the elections, there was a good chance that
704# the start was postponed to November, but it did not happen this year.
705#
706# It has not yet been posted to http://pcdsh01.on.br/DecHV.html
707#
708# An official page about it:
709# http://www.mme.gov.br/site/news/detail.do?newsId=16722
710# Note that this link does not always work directly, but must be accessed
711# by going to
712# http://www.mme.gov.br/first
713#
714# One example link that works directly:
715# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
716# (Portuguese)
717#
718# We have a written a short article about it as well:
747# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
719# https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
720#
721# From Alexander Krivenyshev (2011-10-04):
722# State Bahia will return to Daylight savings time this year after 8 years off.
723# The announcement was made by Governor Jaques Wagner in an interview to a
724# television station in Salvador.
725
726# In Portuguese:
727# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
756# http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
728# https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
729
730# From Guilherme Bernardes Rodrigues (2011-10-07):
731# There is news in the media, however there is still no decree about it.
732# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
733# official agency about time in Brazil, and she confirmed that the old rule is
734# still in force.
735
736# From Guilherme Bernardes Rodrigues (2011-10-14)
737# It's official, the President signed a decree that includes Bahia in summer
738# time.
739# [ and in a second message (same day): ]
740# I found the decree.
741#
742# DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011
743# Link :
744# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
745
746# From Kelley Cook (2012-10-16):
747# The governor of state of Bahia in Brazil announced on Thursday that
748# due to public pressure, he is reversing the DST policy they implemented
749# last year and will not be going to Summer Time on October 21st....
750# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
751
752# From Rodrigo Severo (2012-10-16):
753# Tocantins state will have DST.
782# http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
754# https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
755
756# From Steffen Thorsen (2013-09-20):
757# Tocantins in Brazil is very likely not to observe DST from October....
758# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
759# We will keep this article updated when this is confirmed:
788# http://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
760# https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
761
762# From Steffen Thorsen (2013-10-17):
791# http://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
763# https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
764# Senator Jorge Viana announced that Acre will change time zone on November 10.
765# He did not specify the time of the change, nor if western parts of Amazonas
766# will change as well.
767#
768# From Paul Eggert (2013-10-17):
769# For now, assume western Amazonas will change as well.
770
771# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
772# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
773# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
774Rule Brazil 1931 only - Oct 3 11:00 1:00 S
775Rule Brazil 1932 1933 - Apr 1 0:00 0 -
776Rule Brazil 1932 only - Oct 3 0:00 1:00 S
777# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
778# revoked DST.
779# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
780# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
781Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
782Rule Brazil 1950 only - Apr 16 1:00 0 -
783Rule Brazil 1951 1952 - Apr 1 0:00 0 -
784# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
785Rule Brazil 1953 only - Mar 1 0:00 0 -
786# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
787# revoked DST.
788# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
789# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
790# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
791# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
792# extended the above decree to all of the national territory on 12-09.
793Rule Brazil 1963 only - Dec 9 0:00 1:00 S
794# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
795# extended summer time by one day to 1964-03-01 00:00 (start of school).
796Rule Brazil 1964 only - Mar 1 0:00 0 -
797# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
798Rule Brazil 1965 only - Jan 31 0:00 1:00 S
799Rule Brazil 1965 only - Mar 31 0:00 0 -
800# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
801Rule Brazil 1965 only - Dec 1 0:00 1:00 S
802# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
803Rule Brazil 1966 1968 - Mar 1 0:00 0 -
804Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
805# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
806# revoked DST.
807# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
808Rule Brazil 1985 only - Nov 2 0:00 1:00 S
809# Decree 92,310 (1986-01-21)
810# Decree 92,463 (1986-03-13)
811Rule Brazil 1986 only - Mar 15 0:00 0 -
812# Decree 93,316 (1986-10-01)
813Rule Brazil 1986 only - Oct 25 0:00 1:00 S
814Rule Brazil 1987 only - Feb 14 0:00 0 -
815# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
816Rule Brazil 1987 only - Oct 25 0:00 1:00 S
817Rule Brazil 1988 only - Feb 7 0:00 0 -
818# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
819# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
820Rule Brazil 1988 only - Oct 16 0:00 1:00 S
821Rule Brazil 1989 only - Jan 29 0:00 0 -
822# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
823# with the same exceptions
824Rule Brazil 1989 only - Oct 15 0:00 1:00 S
825Rule Brazil 1990 only - Feb 11 0:00 0 -
826# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
827# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
828# Decree 99,629 (1990-10-19) adds BA, MT.
829Rule Brazil 1990 only - Oct 21 0:00 1:00 S
830Rule Brazil 1991 only - Feb 17 0:00 0 -
831# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
832# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
833Rule Brazil 1991 only - Oct 20 0:00 1:00 S
834Rule Brazil 1992 only - Feb 9 0:00 0 -
835# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
836# adopted by same states.
837Rule Brazil 1992 only - Oct 25 0:00 1:00 S
838Rule Brazil 1993 only - Jan 31 0:00 0 -
839# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
840# adopted by same states, plus AM.
841# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
842# web page corrected 2004-01-07) adopted by same states, minus AM.
843# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
844# adopted by same states, plus MT and TO.
845# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
846# adds AL, SE.
847Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
848Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
849Rule Brazil 1996 only - Feb 11 0:00 0 -
850# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
851# adopted by same states, minus AL, SE.
852Rule Brazil 1996 only - Oct 6 0:00 1:00 S
853Rule Brazil 1997 only - Feb 16 0:00 0 -
854# From Daniel C. Sobral (1998-02-12):
855# In 1997, the DS began on October 6. The stated reason was that
856# because international television networks ignored Brazil's policy on DS,
857# they bought the wrong times on satellite for coverage of Pope's visit.
858# This year, the ending date of DS was postponed to March 1
859# to help dealing with the shortages of electric power.
860#
861# Decree 2,317 (1997-09-04), adopted by same states.
862Rule Brazil 1997 only - Oct 6 0:00 1:00 S
863# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
864# (1998-02-10)
865Rule Brazil 1998 only - Mar 1 0:00 0 -
866# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
867# adopted by the same states as before.
868Rule Brazil 1998 only - Oct 11 0:00 1:00 S
869Rule Brazil 1999 only - Feb 21 0:00 0 -
870# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
871# (1999-08-23) adopted by same states.
872# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
873# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
874Rule Brazil 1999 only - Oct 3 0:00 1:00 S
875Rule Brazil 2000 only - Feb 27 0:00 0 -
876# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
877# adopted by the same states as before.
878# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
879# repeals DST in PE and RR, effective 2000-10-15 00:00.
880# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
881# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
882# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
883# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
884Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
885Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
886# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
887# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
888Rule Brazil 2002 only - Nov 3 0:00 1:00 S
889# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
890# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
891Rule Brazil 2003 only - Oct 19 0:00 1:00 S
892# Decree 5,223 (2004-10-01) reestablishes DST in MT.
893# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
894Rule Brazil 2004 only - Nov 2 0:00 1:00 S
895# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
896# adopted by the same states as before.
897Rule Brazil 2005 only - Oct 16 0:00 1:00 S
898# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
899# adopted by the same states as before.
900Rule Brazil 2006 only - Nov 5 0:00 1:00 S
901Rule Brazil 2007 only - Feb 25 0:00 0 -
902# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
903# adopted by the same states as before.
904Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
905# From Frederico A. C. Neves (2008-09-10):
906# According to this decree
907# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
908# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
909# 3rd Feb Sunday. There is an exception on the return date when this is
910# the Carnival Sunday then the return date will be the next Sunday...
911Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
912Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
913Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
914Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
915Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
916Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
917Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
918Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
919Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
920Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
921Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
922Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
923Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
924# From Arthur David Olson (2008-09-29):
925# The next is wrong in some years but is better than nothing.
926Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
927
928# The latest ruleset listed above says that the following states observe DST:
929# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
930
931# Zone NAME GMTOFF RULES FORMAT [UNTIL]
932#
933# Fernando de Noronha (administratively part of PE)
934Zone America/Noronha -2:09:40 - LMT 1914
963 -2:00 Brazil FN%sT 1990 Sep 17
964 -2:00 - FNT 1999 Sep 30
965 -2:00 Brazil FN%sT 2000 Oct 15
966 -2:00 - FNT 2001 Sep 13
967 -2:00 Brazil FN%sT 2002 Oct 1
968 -2:00 - FNT
935 -2:00 Brazil -02/-01 1990 Sep 17
936 -2:00 - -02 1999 Sep 30
937 -2:00 Brazil -02/-01 2000 Oct 15
938 -2:00 - -02 2001 Sep 13
939 -2:00 Brazil -02/-01 2002 Oct 1
940 -2:00 - -02
941# Other Atlantic islands have no permanent settlement.
942# These include Trindade and Martim Vaz (administratively part of ES),
943# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
944# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
945# it also included the Penedos.
946#
947# Amap�� (AP), east Par�� (PA)
948# East Par�� includes Bel��m, Marab��, Serra Norte, and S��o F��lix do Xingu.
949# The division between east and west Par�� is the river Xingu.
950# In the north a very small part from the river Javary (now Jari I guess,
951# the border with Amap��) to the Amazon, then to the Xingu.
952Zone America/Belem -3:13:56 - LMT 1914
981 -3:00 Brazil BR%sT 1988 Sep 12
982 -3:00 - BRT
953 -3:00 Brazil -03/-02 1988 Sep 12
954 -3:00 - -03
955#
956# west Par�� (PA)
957# West Par�� includes Altamira, ��bidos, Prainha, Oriximin��, and Santar��m.
958Zone America/Santarem -3:38:48 - LMT 1914
987 -4:00 Brazil AM%sT 1988 Sep 12
988 -4:00 - AMT 2008 Jun 24 0:00
989 -3:00 - BRT
959 -4:00 Brazil -04/-03 1988 Sep 12
960 -4:00 - -04 2008 Jun 24 0:00
961 -3:00 - -03
962#
963# Maranh��o (MA), Piau�� (PI), Cear�� (CE), Rio Grande do Norte (RN),
964# Para��ba (PB)
965Zone America/Fortaleza -2:34:00 - LMT 1914
994 -3:00 Brazil BR%sT 1990 Sep 17
995 -3:00 - BRT 1999 Sep 30
996 -3:00 Brazil BR%sT 2000 Oct 22
997 -3:00 - BRT 2001 Sep 13
998 -3:00 Brazil BR%sT 2002 Oct 1
999 -3:00 - BRT
966 -3:00 Brazil -03/-02 1990 Sep 17
967 -3:00 - -03 1999 Sep 30
968 -3:00 Brazil -03/-02 2000 Oct 22
969 -3:00 - -03 2001 Sep 13
970 -3:00 Brazil -03/-02 2002 Oct 1
971 -3:00 - -03
972#
973# Pernambuco (PE) (except Atlantic islands)
974Zone America/Recife -2:19:36 - LMT 1914
1003 -3:00 Brazil BR%sT 1990 Sep 17
1004 -3:00 - BRT 1999 Sep 30
1005 -3:00 Brazil BR%sT 2000 Oct 15
1006 -3:00 - BRT 2001 Sep 13
1007 -3:00 Brazil BR%sT 2002 Oct 1
1008 -3:00 - BRT
975 -3:00 Brazil -03/-02 1990 Sep 17
976 -3:00 - -03 1999 Sep 30
977 -3:00 Brazil -03/-02 2000 Oct 15
978 -3:00 - -03 2001 Sep 13
979 -3:00 Brazil -03/-02 2002 Oct 1
980 -3:00 - -03
981#
982# Tocantins (TO)
983Zone America/Araguaina -3:12:48 - LMT 1914
1012 -3:00 Brazil BR%sT 1990 Sep 17
1013 -3:00 - BRT 1995 Sep 14
1014 -3:00 Brazil BR%sT 2003 Sep 24
1015 -3:00 - BRT 2012 Oct 21
1016 -3:00 Brazil BR%sT 2013 Sep
1017 -3:00 - BRT
984 -3:00 Brazil -03/-02 1990 Sep 17
985 -3:00 - -03 1995 Sep 14
986 -3:00 Brazil -03/-02 2003 Sep 24
987 -3:00 - -03 2012 Oct 21
988 -3:00 Brazil -03/-02 2013 Sep
989 -3:00 - -03
990#
991# Alagoas (AL), Sergipe (SE)
992Zone America/Maceio -2:22:52 - LMT 1914
1021 -3:00 Brazil BR%sT 1990 Sep 17
1022 -3:00 - BRT 1995 Oct 13
1023 -3:00 Brazil BR%sT 1996 Sep 4
1024 -3:00 - BRT 1999 Sep 30
1025 -3:00 Brazil BR%sT 2000 Oct 22
1026 -3:00 - BRT 2001 Sep 13
1027 -3:00 Brazil BR%sT 2002 Oct 1
1028 -3:00 - BRT
993 -3:00 Brazil -03/-02 1990 Sep 17
994 -3:00 - -03 1995 Oct 13
995 -3:00 Brazil -03/-02 1996 Sep 4
996 -3:00 - -03 1999 Sep 30
997 -3:00 Brazil -03/-02 2000 Oct 22
998 -3:00 - -03 2001 Sep 13
999 -3:00 Brazil -03/-02 2002 Oct 1
1000 -3:00 - -03
1001#
1002# Bahia (BA)
1003# There are too many Salvadors elsewhere, so use America/Bahia instead
1004# of America/Salvador.
1005Zone America/Bahia -2:34:04 - LMT 1914
1034 -3:00 Brazil BR%sT 2003 Sep 24
1035 -3:00 - BRT 2011 Oct 16
1036 -3:00 Brazil BR%sT 2012 Oct 21
1037 -3:00 - BRT
1006 -3:00 Brazil -03/-02 2003 Sep 24
1007 -3:00 - -03 2011 Oct 16
1008 -3:00 Brazil -03/-02 2012 Oct 21
1009 -3:00 - -03
1010#
1011# Goi��s (GO), Distrito Federal (DF), Minas Gerais (MG),
1012# Esp��rito Santo (ES), Rio de Janeiro (RJ), S��o Paulo (SP), Paran�� (PR),
1013# Santa Catarina (SC), Rio Grande do Sul (RS)
1014Zone America/Sao_Paulo -3:06:28 - LMT 1914
1043 -3:00 Brazil BR%sT 1963 Oct 23 0:00
1044 -3:00 1:00 BRST 1964
1045 -3:00 Brazil BR%sT
1015 -3:00 Brazil -03/-02 1963 Oct 23 0:00
1016 -3:00 1:00 -02 1964
1017 -3:00 Brazil -03/-02
1018#
1019# Mato Grosso do Sul (MS)
1020Zone America/Campo_Grande -3:38:28 - LMT 1914
1049 -4:00 Brazil AM%sT
1021 -4:00 Brazil -04/-03
1022#
1023# Mato Grosso (MT)
1024Zone America/Cuiaba -3:44:20 - LMT 1914
1053 -4:00 Brazil AM%sT 2003 Sep 24
1054 -4:00 - AMT 2004 Oct 1
1055 -4:00 Brazil AM%sT
1025 -4:00 Brazil -04/-03 2003 Sep 24
1026 -4:00 - -04 2004 Oct 1
1027 -4:00 Brazil -04/-03
1028#
1029# Rond��nia (RO)
1030Zone America/Porto_Velho -4:15:36 - LMT 1914
1059 -4:00 Brazil AM%sT 1988 Sep 12
1060 -4:00 - AMT
1031 -4:00 Brazil -04/-03 1988 Sep 12
1032 -4:00 - -04
1033#
1034# Roraima (RR)
1035Zone America/Boa_Vista -4:02:40 - LMT 1914
1064 -4:00 Brazil AM%sT 1988 Sep 12
1065 -4:00 - AMT 1999 Sep 30
1066 -4:00 Brazil AM%sT 2000 Oct 15
1067 -4:00 - AMT
1036 -4:00 Brazil -04/-03 1988 Sep 12
1037 -4:00 - -04 1999 Sep 30
1038 -4:00 Brazil -04/-03 2000 Oct 15
1039 -4:00 - -04
1040#
1041# east Amazonas (AM): Boca do Acre, Juta��, Manaus, Floriano Peixoto
1042# The great circle line from Tabatinga to Porto Acre divides
1043# east from west Amazonas.
1044Zone America/Manaus -4:00:04 - LMT 1914
1073 -4:00 Brazil AM%sT 1988 Sep 12
1074 -4:00 - AMT 1993 Sep 28
1075 -4:00 Brazil AM%sT 1994 Sep 22
1076 -4:00 - AMT
1045 -4:00 Brazil -04/-03 1988 Sep 12
1046 -4:00 - -04 1993 Sep 28
1047 -4:00 Brazil -04/-03 1994 Sep 22
1048 -4:00 - -04
1049#
1050# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1051# Eirunep��, Envira, Ipixuna
1052Zone America/Eirunepe -4:39:28 - LMT 1914
1081 -5:00 Brazil AC%sT 1988 Sep 12
1082 -5:00 - ACT 1993 Sep 28
1083 -5:00 Brazil AC%sT 1994 Sep 22
1084 -5:00 - ACT 2008 Jun 24 0:00
1085 -4:00 - AMT 2013 Nov 10
1086 -5:00 - ACT
1053 -5:00 Brazil -05/-04 1988 Sep 12
1054 -5:00 - -05 1993 Sep 28
1055 -5:00 Brazil -05/-04 1994 Sep 22
1056 -5:00 - -05 2008 Jun 24 0:00
1057 -4:00 - -04 2013 Nov 10
1058 -5:00 - -05
1059#
1060# Acre (AC)
1061Zone America/Rio_Branco -4:31:12 - LMT 1914
1090 -5:00 Brazil AC%sT 1988 Sep 12
1091 -5:00 - ACT 2008 Jun 24 0:00
1092 -4:00 - AMT 2013 Nov 10
1093 -5:00 - ACT
1062 -5:00 Brazil -05/-04 1988 Sep 12
1063 -5:00 - -05 2008 Jun 24 0:00
1064 -4:00 - -04 2013 Nov 10
1065 -5:00 - -05
1066
1067# Chile
1068
1069# From Paul Eggert (2015-04-03):
1070# Shanks & Pottenger says America/Santiago introduced standard time in
1071# 1890 and rounds its UTC offset to 70W40; guess that in practice this
1072# was the same offset as in 1916-1919. It also says Pacific/Easter
1073# standardized on 109W22 in 1890; assume this didn't change the clocks.
1074#
1075# Dates for America/Santiago from 1910 to 2004 are primarily from
1076# the following source, cited by Oscar van Vlijmen (2006-10-08):
1077# [1] Chile Law
1078# http://www.webexhibits.org/daylightsaving/chile.html
1107# This contains a copy of a this official table:
1079# This contains a copy of this official table:
1080# Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30)
1109# http://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm
1081# https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm
1082# [1] needs several corrections, though.
1083#
1084# The first set of corrections is from:
1085# [2] History of the Official Time of Chile
1086# http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06). See:
1115# http://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html
1087# https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html
1088# This is an English translation of:
1089# Historia de la hora oficial de Chile (retrieved 2012-10-24). See:
1118# http://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm
1090# https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm
1091# A fancier Spanish version (requiring mouse-clicking) is at:
1092# http://www.horaoficial.cl/historia_hora.html
1093# Conflicts between [1] and [2] were resolved as follows:
1094#
1095# - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites
1096# Bolet��n No. 1, Aviso No. 1 (1910). Go with [2].
1097#
1098# - [1] says SMT was -4:42:45, [2] says Chile's official time from
1099# 1916 to 1919 was -4:42:46.3, the meridian of Chile's National
1100# Astronomical Observatory (OAN), then located in what is now
1101# Quinta Normal in Santiago. Go with [2], rounding it to -4:42:46.
1102#
1103# - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites
1104# Bolet��n No. 22, Aviso No. 129/1918 (1918-08-23). Go with [2].
1105#
1106# - [1] does not give times for transitions; assume they occur
1107# at midnight mainland time, the current common practice. However,
1108# go with [2]'s specification of 23:00 for the 1947-05-21 transition.
1109#
1110# Another correction to [1] is from Jesper N��rgaard Welen, who
1111# wrote (2006-10-08), "I think that there are some obvious mistakes in
1112# the suggested link from Oscar van Vlijmen,... for instance entry 66
1113# says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at
1114# 1990-09-15 (they should have been 1990-09-15 and 1990-09-16
1115# respectively), but anyhow it clears up some doubts too."
1116#
1117# Data for Pacific/Easter from 1910 through 1967 come from Shanks &
1118# Pottenger. After that, for lack of better info assume
1119# Pacific/Easter is always two hours behind America/Santiago;
1120# this is known to work for DST transitions starting in 2008 and
1121# may well be true for earlier transitions.
1122
1123# From Eduardo Krell (1995-10-19):
1124# The law says to switch to DST at midnight [24:00] on the second SATURDAY
1125# of October.... The law is the same for March and October.
1126# (1998-09-29):
1127# Because of the drought this year, the government decided to go into
1128# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1129# (unless there's another dry season next year, I guess).
1130
1131# From Julio I. Pacheco Troncoso (1999-03-18):
1132# Because of the same drought, the government decided to end DST later,
1133# on April 3, (one-time change).
1134
1135# From Germ��n Poo-Caama��o (2008-03-03):
1136# Due to drought, Chile extends Daylight Time in three weeks. This
1137# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1138# and Saturday 3/29 at 22:00 for Pacific/Easter)
1139# The Supreme Decree is located at
1140# http://www.shoa.cl/servicios/supremo316.pdf
1141#
1142# From Jos�� Miguel Garrido (2008-03-05):
1143# http://www.shoa.cl/noticias/2008/04hora/hora.htm
1144
1145# From Angel Chiang (2010-03-04):
1146# Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1147# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1148#
1149# From Arthur David Olson (2010-03-06):
1150# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1151
1152# From Glenn Eychaner (2011-03-28):
1153# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1154# In English:
1155# Chile's clocks will go back an hour this year on the 7th of May instead
1156# of this Saturday. They will go forward again the 3rd Saturday in
1157# August, not in October as they have since 1968.
1158
1159# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1160# As stated in the website of the Chilean Energy Ministry
1161# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1162# The Chilean Government has decided to postpone the entrance into winter time
1163# (to leave DST) from March 11 2012 to April 28th 2012....
1164# Quote from the website communication:
1165#
1166# 6. For the year 2012, the dates of entry into winter time will be as follows:
1167# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1168# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1169# of the same day.
1170# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1171# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1172# 01:00 on September 2.
1173
1174# From Steffen Thorsen (2013-02-15):
1175# According to several news sources, Chile has extended DST this year,
1176# they will end DST later and start DST earlier than planned. They
1177# hope to save energy. The new end date is 2013-04-28 00:00 and new
1178# start date is 2013-09-08 00:00....
1179# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1180
1181# From Jos�� Miguel Garrido (2014-02-19):
1182# Today appeared in the Diario Oficial a decree amending the time change
1183# dates to 2014.
1184# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
1185# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
1186# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
1187
1188# From Eduardo Romero Urra (2015-03-03):
1189# Today has been published officially that Chile will use the DST time
1190# permanently until March 25 of 2017
1191# http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg
1192#
1193# From Paul Eggert (2015-03-03):
1194# For now, assume that the extension will persist indefinitely.
1195
1196# From Juan Correa (2016-03-18):
1197# The decree regarding DST has been published in today's Official Gazette:
1198# http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/
1199# http://www.leychile.cl/Navegar?idNorma=1088502
1200# It does consider the second Saturday of May and August as the dates
1201# for the transition; and it lists DST dates until 2019, but I think
1202# this scheme will stick.
1203#
1204# From Paul Eggert (2016-03-18):
1205# For now, assume the pattern holds for the indefinite future.
1206# The decree says transitions occur at 24:00; in practice this appears
1207# to mean 24:00 mainland time, not 24:00 local time, so that Easter
1208# Island is always two hours behind the mainland.
1209
1210# From Juan Correa (2016-12-04):
1211# Magallanes region ... will keep DST (UTC -3) all year round....
1212# http://www.soychile.cl/Santiago/Sociedad/2016/12/04/433428/Bachelet-firmo-el-decreto-para-establecer-un-horario-unico-para-la-Region-de-Magallanes.aspx
1213#
1214# From Deborah Goldsmith (2017-01-19):
1215# http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf
1216# From Paul Eggert (2017-01-19):
1217# The above says the Magallanes change expires 2019-05-11 at 24:00,
1218# so in theory, they will revert to -04/-03 after that, which means
1219# they will switch from -03 to -04 one hour after Santiago does that day.
1220# For now, assume that they will not revert.
1221
1222# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1223Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
1224Rule Chile 1928 1932 - Apr 1 0:00 0 -
1225Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1226Rule Chile 1969 only - Mar 30 3:00u 0 -
1227Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1228Rule Chile 1970 only - Mar 29 3:00u 0 -
1229Rule Chile 1971 only - Mar 14 3:00u 0 -
1230Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1231Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1232Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1233Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1234Rule Chile 1987 only - Apr 12 3:00u 0 -
1235Rule Chile 1988 1990 - Mar Sun>=9 3:00u 0 -
1236Rule Chile 1988 1989 - Oct Sun>=9 4:00u 1:00 S
1237Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1238Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1239Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1240Rule Chile 1997 only - Mar 30 3:00u 0 -
1241Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1242Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1243Rule Chile 1999 only - Apr 4 3:00u 0 -
1244Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
1245Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1246# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1247# which is used below in specifying the transition.
1248Rule Chile 2008 only - Mar 30 3:00u 0 -
1249Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1250Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1251Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1252Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1253Rule Chile 2012 2014 - Apr Sun>=23 3:00u 0 -
1254Rule Chile 2012 2014 - Sep Sun>=2 4:00u 1:00 S
1255Rule Chile 2016 max - May Sun>=9 3:00u 0 -
1256Rule Chile 2016 max - Aug Sun>=9 4:00u 1:00 S
1257# IATA SSIM anomalies: (1992-02) says 1992-03-14;
1258# (1996-09) says 1998-03-08. Ignore these.
1259# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1260Zone America/Santiago -4:42:46 - LMT 1890
1261 -4:42:46 - SMT 1910 Jan 10 # Santiago Mean Time
1278 -5:00 - CLT 1916 Jul 1 # Chile Time
1262 -5:00 - -05 1916 Jul 1
1263 -4:42:46 - SMT 1918 Sep 10
1280 -4:00 - CLT 1919 Jul 1
1264 -4:00 - -04 1919 Jul 1
1265 -4:42:46 - SMT 1927 Sep 1
1282 -5:00 Chile CL%sT 1932 Sep 1
1283 -4:00 - CLT 1942 Jun 1
1284 -5:00 - CLT 1942 Aug 1
1285 -4:00 - CLT 1946 Jul 15
1286 -4:00 1:00 CLST 1946 Sep 1 # central Chile
1287 -4:00 - CLT 1947 Apr 1
1288 -5:00 - CLT 1947 May 21 23:00
1289 -4:00 Chile CL%sT
1266 -5:00 Chile -05/-04 1932 Sep 1
1267 -4:00 - -04 1942 Jun 1
1268 -5:00 - -05 1942 Aug 1
1269 -4:00 - -04 1946 Jul 15
1270 -4:00 1:00 -03 1946 Sep 1 # central Chile
1271 -4:00 - -04 1947 Apr 1
1272 -5:00 - -05 1947 May 21 23:00
1273 -4:00 Chile -04/-03
1274Zone America/Punta_Arenas -4:43:40 - LMT 1890
1275 -4:42:46 - SMT 1910 Jan 10
1276 -5:00 - -05 1916 Jul 1
1277 -4:42:46 - SMT 1918 Sep 10
1278 -4:00 - -04 1919 Jul 1
1279 -4:42:46 - SMT 1927 Sep 1
1280 -5:00 Chile -05/-04 1932 Sep 1
1281 -4:00 - -04 1942 Jun 1
1282 -5:00 - -05 1942 Aug 1
1283 -4:00 - -04 1947 Apr 1
1284 -5:00 - -05 1947 May 21 23:00
1285 -4:00 Chile -04/-03 2016 Dec 4
1286 -3:00 - -03
1287Zone Pacific/Easter -7:17:28 - LMT 1890
1288 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1292 -7:00 Chile EAS%sT 1982 Mar 14 3:00u # Easter Time
1293 -6:00 Chile EAS%sT
1289 -7:00 Chile -07/-06 1982 Mar 14 3:00u # Easter Time
1290 -6:00 Chile -06/-05
1291#
1292# Salas y G��mez Island is uninhabited.
1293# Other Chilean locations, including Juan Fern��ndez Is, Desventuradas Is,
1294# and Antarctic bases, are like America/Santiago.
1295
1296# Antarctic base using South American rules
1297# (See the file 'antarctica' for more.)
1298#
1299# Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
1300#
1301# From Ethan Dicks (1996-10-06):
1302# It keeps the same time as Punta Arenas, Chile, because, just like us
1303# and the South Pole, that's the other end of their supply line....
1304# I verified with someone who was there that since 1980,
1305# Palmer has followed Chile. Prior to that, before the Falklands War,
1306# Palmer used to be supplied from Argentina.
1307#
1308# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1309Zone Antarctica/Palmer 0 - -00 1965
1313 -4:00 Arg AR%sT 1969 Oct 5
1314 -3:00 Arg AR%sT 1982 May
1315 -4:00 Chile CL%sT
1310 -4:00 Arg -04/-03 1969 Oct 5
1311 -3:00 Arg -03/-02 1982 May
1312 -4:00 Chile -04/-03 2016 Dec 4
1313 -3:00 - -03
1314
1315# Colombia
1316
1317# Milne gives 4:56:16.4 for Bogot�� time in 1899; round to nearest. He writes,
1318# "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1319
1320# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1321Rule CO 1992 only - May 3 0:00 1:00 S
1322Rule CO 1993 only - Apr 4 0:00 0 -
1323# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1324Zone America/Bogota -4:56:16 - LMT 1884 Mar 13
1325 -4:56:16 - BMT 1914 Nov 23 # Bogot�� Mean Time
1328 -5:00 CO CO%sT # Colombia Time
1326 -5:00 CO -05/-04
1327# Malpelo, Providencia, San Andres
1328# no information; probably like America/Bogota
1329
1330# Cura��ao
1331
1332# Milne gives 4:35:46.9 for Cura��ao mean time; round to nearest.
1333#
1334# From Paul Eggert (2006-03-22):
1335# Shanks & Pottenger say that The Bottom and Philipsburg have been at
1336# -4:00 since standard time was introduced on 1912-03-02; and that
1337# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1338# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1339# Saba Island has been like Cura��ao.
1340# This all predates our 1970 cutoff, though.
1341#
1342# By July 2007 Cura��ao and St Maarten are planned to become
1343# associated states within the Netherlands, much like Aruba;
1344# Bonaire, Saba and St Eustatius would become directly part of the
1345# Netherlands as Kingdom Islands. This won't affect their time zones
1346# though, as far as we know.
1347#
1348# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1349Zone America/Curacao -4:35:47 - LMT 1912 Feb 12 # Willemstad
1352 -4:30 - ANT 1965 # Netherlands Antilles Time
1350 -4:30 - -0430 1965
1351 -4:00 - AST
1352
1353# From Arthur David Olson (2011-06-15):
1354# use links for places with new iso3166 codes.
1355# The name "Lower Prince's Quarter" is both longer than fourteen characters
1356# and contains an apostrophe; use "Lower_Princes" below.
1357
1358Link America/Curacao America/Lower_Princes # Sint Maarten
1359Link America/Curacao America/Kralendijk # Caribbean Netherlands
1360
1361# Ecuador
1362#
1363# Milne says the Central and South American Telegraph Company used -5:24:15.
1364#
1367# From Paul Eggert (2007-03-04):
1368# Apparently Ecuador had a failed experiment with DST in 1992.
1369# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1370# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1371# talk about "hora Sixto". Leave this alone for now, as we have no data.
1365# From Alois Treindl (2016-12-15):
1366# https://www.elcomercio.com/actualidad/hora-sixto-1993.html
1367# ... Whether the law applied also to Gal��pagos, I do not know.
1368# From Paul Eggert (2016-12-15):
1369# https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html
1370# This says President Sixto Dur��n Ball��n signed decree No. 285, which
1371# established DST from 1992-11-28 to 1993-02-05; it does not give transition
1372# times. The people called it "hora de Sixto" ("Sixto hour"). The change did
1373# not go over well; a popular song "Qu�� hora es" by Jaime Guevara had lyrics
1374# that included "Amanec��a en mitad de la noche, los guaguas iban a clase sin
1375# sol" ("It was dawning in the middle of the night, the buses went to class
1376# without sun"). Although Ball��n's campaign slogan was "Ni un paso atr��s"
1377# (Not one step back), the clocks went back in 1993 and the experiment was not
1378# repeated. For now, assume transitions were at 00:00 local time country-wide.
1379#
1380# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1381Rule Ecuador 1992 only - Nov 28 0:00 1:00 S
1382Rule Ecuador 1993 only - Feb 5 0:00 0 -
1383#
1384# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1385Zone America/Guayaquil -5:19:20 - LMT 1890
1386 -5:14:00 - QMT 1931 # Quito Mean Time
1376 -5:00 - ECT # Ecuador Time
1387 -5:00 Ecuador -05/-04
1388Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1378 -5:00 - ECT 1986
1379 -6:00 - GALT # Gal��pagos Time
1389 -5:00 - -05 1986
1390 -6:00 Ecuador -06/-05
1391
1392# Falklands
1393
1394# From Paul Eggert (2006-03-22):
1395# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1396# the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1397
1398# From Falkland Islands Government Office, London (2001-01-22)
1399# via Jesper N��rgaard:
1400# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1401# April 2001 and advance one hour to summer time at 2 am on Sunday 2
1402# September. It is anticipated that the clocks will revert back at 2
1403# am on Sunday 21 April 2002 and advance to summer time at 2 am on
1404# Sunday 1 September.
1405
1406# From Rives McDow (2001-02-13):
1407#
1408# I have communicated several times with people there, and the last
1409# time I had communications that was helpful was in 1998. Here is
1410# what was said then:
1411#
1412# "The general rule was that Stanley used daylight saving and the Camp
1413# did not. However for various reasons many people in the Camp have
1414# started to use daylight saving (known locally as 'Stanley Time')
1415# There is no rule as to who uses daylight saving - it is a matter of
1416# personal choice and so it is impossible to draw a map showing who
1417# uses it and who does not. Any list would be out of date as soon as
1418# it was produced. This year daylight saving ended on April 18/19th
1419# and started again on September 12/13th. I do not know what the rule
1420# is, but can find out if you like. We do not change at the same time
1421# as UK or Chile."
1422#
1423# I did have in my notes that the rule was "Second Saturday in Sep at
1424# 0:00 until third Saturday in Apr at 0:00". I think that this does
1425# not agree in some cases with Shanks; is this true?
1426#
1427# Also, there is no mention in the list that some areas in the
1428# Falklands do not use DST. I have found in my communications there
1429# that these areas are on the western half of East Falkland and all of
1430# West Falkland. Stanley is the only place that consistently observes
1431# DST. Again, as in other places in the world, the farmers don't like
1432# it. West Falkland is almost entirely sheep farmers.
1433#
1434# I know one lady there that keeps a list of which farm keeps DST and
1435# which doesn't each year. She runs a shop in Stanley, and says that
1436# the list changes each year. She uses it to communicate to her
1437# customers, catching them when they are home for lunch or dinner.
1438
1439# From Paul Eggert (2001-03-05):
1440# For now, we'll just record the time in Stanley, since we have no
1441# better info.
1442
1443# From Steffen Thorsen (2011-04-01):
1444# The Falkland Islands will not turn back clocks this winter, but stay on
1445# daylight saving time.
1446#
1447# One source:
1448# http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1449#
1450# We have gotten this confirmed by a clerk of the legislative assembly:
1451# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1452# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1453# hours) on the first Sunday of September at 0200hrs.
1454#
1455# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1456# will not revert to local mean time, but clocks will remain on Summer
1457# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1458# change to local time following the trial period will be notified.
1459#
1460# From Andrew Newman (2012-02-24)
1461# A letter from Justin McPhee, Chief Executive,
1462# Cable & Wireless Falkland Islands (dated 2012-02-22)
1463# states...
1464# The current Atlantic/Stanley entry under South America expects the
1465# clocks to go back to standard Falklands Time (FKT) on the 15th April.
1466# The database entry states that in 2011 Stanley was staying on fixed
1467# summer time on a trial basis only. FIG need to contact IANA and/or
1468# the maintainers of the database to inform them we're adopting
1469# the same policy this year and suggest recommendations for future years.
1470#
1471# For now we will assume permanent summer time for the Falklands
1472# until advised differently (to apply for 2012 and beyond, after the 2011
1473# experiment was apparently successful.)
1474# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1475Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1476Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1477Rule Falk 1939 only - Oct 1 0:00 1:00 S
1478Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1479Rule Falk 1943 only - Jan 1 0:00 0 -
1480Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1481Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1482Rule Falk 1984 only - Sep 16 0:00 1:00 S
1483Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1484Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1485Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1486Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1487# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1488Zone Atlantic/Stanley -3:51:24 - LMT 1890
1489 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1479 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1480 -3:00 Falk FK%sT 1985 Sep 15
1481 -4:00 Falk FK%sT 2010 Sep 5 2:00
1482 -3:00 - FKST
1490 -4:00 Falk -04/-03 1983 May
1491 -3:00 Falk -03/-02 1985 Sep 15
1492 -4:00 Falk -04/-03 2010 Sep 5 2:00
1493 -3:00 - -03
1494
1495# French Guiana
1496# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1497Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1487 -4:00 - GFT 1967 Oct # French Guiana Time
1488 -3:00 - GFT
1498 -4:00 - -04 1967 Oct
1499 -3:00 - -03
1500
1501# Guyana
1502# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1503Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1493 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1494 -3:45 - GYT 1975 Jul 31 # Guyana Time
1495 -3:00 - GYT 1991
1504 -3:45 - -0345 1975 Jul 31
1505 -3:00 - -03 1991
1506# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1497 -4:00 - GYT
1507 -4:00 - -04
1508
1509# Paraguay
1510#
1511# From Paul Eggert (2006-03-22):
1512# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
1513# and autumn transitions are 00:00 -> 23:00. Go with pre-1999
1514# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1515#
1516# From Waldemar Villamayor-Venialbo (2013-09-20):
1517# No time of the day is established for the adjustment, so people normally
1518# adjust their clocks at 0 hour of the given dates.
1519#
1520# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1521Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1522Rule Para 1975 1978 - Mar 1 0:00 0 -
1523Rule Para 1979 1991 - Apr 1 0:00 0 -
1524Rule Para 1989 only - Oct 22 0:00 1:00 S
1525Rule Para 1990 only - Oct 1 0:00 1:00 S
1526Rule Para 1991 only - Oct 6 0:00 1:00 S
1527Rule Para 1992 only - Mar 1 0:00 0 -
1528Rule Para 1992 only - Oct 5 0:00 1:00 S
1529Rule Para 1993 only - Mar 31 0:00 0 -
1530Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1531Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1532Rule Para 1996 only - Mar 1 0:00 0 -
1533# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1534# From Steffen Thorsen (2000-10-02):
1535# I have three independent reports that Paraguay changed to DST this Sunday
1536# (10-01).
1537#
1538# Translated by Gwillim Law (2001-02-27) from
1539# Noticias, a daily paper in Asunci��n, Paraguay (2000-10-01):
1540# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
1541# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1542# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1543# system has been operating for several years. Formerly there was a separate
1544# decree each year; the new law has the same effect, but permanently. Every
1545# year, the time will change on the first Sunday of October; likewise, the
1546# clock will be set back on the first Sunday of March.
1547#
1548Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1549# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1550Rule Para 1997 only - Feb lastSun 0:00 0 -
1551# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1552# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1553Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1554# From Rives McDow (2002-02-28):
1555# A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the
1556# dst method to be from the first Sunday in September to the first Sunday in
1557# April.
1558Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1559Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1560#
1561# From Jesper N��rgaard Welen (2005-01-02):
1562# There are several sources that claim that Paraguay made
1563# a timezone rule change in autumn 2004.
1564# From Steffen Thorsen (2005-01-05):
1565# Decree 1,867 (2004-03-05)
1566# From Carlos Ra��l Perasso via Jesper N��rgaard Welen (2006-10-13)
1567# http://www.presidencia.gov.py/decretos/D1867.pdf
1568Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1569Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1570# From Carlos Ra��l Perasso (2010-02-18):
1571# By decree number 3958 issued yesterday
1572# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1573# Paraguay changes its DST schedule, postponing the March rule to April and
1574# modifying the October date. The decree reads:
1575# ...
1576# Art. 1. It is hereby established that from the second Sunday of the month of
1577# April of this year (2010), the official time is to be set back 60 minutes,
1578# and that on the first Sunday of the month of October, it is to be set
1579# forward 60 minutes, in all the territory of the Paraguayan Republic.
1580# ...
1581Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1582Rule Para 2010 2012 - Apr Sun>=8 0:00 0 -
1583#
1584# From Steffen Thorsen (2013-03-07):
1585# Paraguay will end DST on 2013-03-24 00:00....
1586# http://www.ande.gov.py/interna.php?id=1075
1587#
1588# From Carlos Ra��l Perasso (2013-03-15):
1589# The change in Paraguay is now final. Decree number 10780
1590# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1591# From Carlos Ra��l Perasso (2014-02-28):
1592# Decree 1264 can be found at:
1593# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
1594Rule Para 2013 max - Mar Sun>=22 0:00 0 -
1595
1596# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1597Zone America/Asuncion -3:50:40 - LMT 1890
1598 -3:50:40 - AMT 1931 Oct 10 # Asunci��n Mean Time
1589 -4:00 - PYT 1972 Oct # Paraguay Time
1590 -3:00 - PYT 1974 Apr
1591 -4:00 Para PY%sT
1599 -4:00 - -04 1972 Oct
1600 -3:00 - -03 1974 Apr
1601 -4:00 Para -04/-03
1602
1603# Peru
1604#
1605# From Evelyn C. Leeper via Mark Brader (2003-10-26)
1606# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1607# When we were in Peru in 1985-1986, they apparently switched over
1608# sometime between December 29 and January 3 while we were on the Amazon.
1609#
1610# From Paul Eggert (2006-03-22):
1611# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1612
1613# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1614Rule Peru 1938 only - Jan 1 0:00 1:00 S
1615Rule Peru 1938 only - Apr 1 0:00 0 -
1616Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1617Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1618Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1619Rule Peru 1986 1987 - Apr 1 0:00 0 -
1620Rule Peru 1990 only - Jan 1 0:00 1:00 S
1621Rule Peru 1990 only - Apr 1 0:00 0 -
1622# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1623Rule Peru 1994 only - Jan 1 0:00 1:00 S
1624Rule Peru 1994 only - Apr 1 0:00 0 -
1625# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1626Zone America/Lima -5:08:12 - LMT 1890
1627 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1618 -5:00 Peru PE%sT # Peru Time
1628 -5:00 Peru -05/-04
1629
1630# South Georgia
1631# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1632Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1623 -2:00 - GST # South Georgia Time
1633 -2:00 - -02
1634
1635# South Sandwich Is
1636# uninhabited; scientific personnel have wintered
1637
1638# Suriname
1639# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1640Zone America/Paramaribo -3:40:40 - LMT 1911
1641 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1642 -3:40:36 - PMT 1945 Oct # The capital moved?
1633 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1634 -3:30 - SRT 1984 Oct # Suriname Time
1635 -3:00 - SRT
1643 -3:30 - -0330 1984 Oct
1644 -3:00 - -03
1645
1646# Trinidad and Tobago
1647# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1648Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1649 -4:00 - AST
1650
1651# These all agree with Trinidad and Tobago since 1970.
1652Link America/Port_of_Spain America/Anguilla
1653Link America/Port_of_Spain America/Antigua
1654Link America/Port_of_Spain America/Dominica
1655Link America/Port_of_Spain America/Grenada
1656Link America/Port_of_Spain America/Guadeloupe
1657Link America/Port_of_Spain America/Marigot # St Martin (French part)
1658Link America/Port_of_Spain America/Montserrat
1659Link America/Port_of_Spain America/St_Barthelemy # St Barth��lemy
1660Link America/Port_of_Spain America/St_Kitts # St Kitts & Nevis
1661Link America/Port_of_Spain America/St_Lucia
1662Link America/Port_of_Spain America/St_Thomas # Virgin Islands (US)
1663Link America/Port_of_Spain America/St_Vincent
1664Link America/Port_of_Spain America/Tortola # Virgin Islands (UK)
1665
1666# Uruguay
1667# From Paul Eggert (1993-11-18):
1668# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1669# From Shanks & Pottenger:
1670# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1671# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1672Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1673Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1674Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1675Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1676# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1677Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1678Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1679Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1680# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1681Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1682# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1683# and 1943 Apr 13 "to present time"; go with Shanks & Pottenger.
1684Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1685Rule Uruguay 1942 only - Jan 1 0:00 0 -
1686Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1687Rule Uruguay 1943 only - Mar 14 0:00 0 -
1688Rule Uruguay 1959 only - May 24 0:00 1:00 S
1689Rule Uruguay 1959 only - Nov 15 0:00 0 -
1690Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1691Rule Uruguay 1960 only - Mar 6 0:00 0 -
1692Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1693Rule Uruguay 1965 only - Sep 26 0:00 0 -
1694Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1695Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1696Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1697Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1698Rule Uruguay 1972 only - Aug 15 0:00 0 -
1699Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1700Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1701Rule Uruguay 1976 only - Oct 1 0:00 0 -
1702Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1703Rule Uruguay 1978 only - Apr 1 0:00 0 -
1704Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1705Rule Uruguay 1980 only - May 1 0:00 0 -
1706Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1707Rule Uruguay 1988 only - Mar 14 0:00 0 -
1708Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1709Rule Uruguay 1989 only - Mar 12 0:00 0 -
1710Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1711# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1712# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1713Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1714Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1715Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1716Rule Uruguay 1993 only - Feb 28 0:00 0 -
1717# From Eduardo Cota (2004-09-20):
1718# The Uruguayan government has decreed a change in the local time....
1719# http://www.presidencia.gub.uy/decretos/2004091502.htm
1720Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1721# From Steffen Thorsen (2005-03-11):
1722# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1723# save energy ... it was postponed two weeks....
1724# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1725Rule Uruguay 2005 only - Mar 27 2:00 0 -
1726# From Eduardo Cota (2005-09-27):
1727# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1728# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1729# 02:00 local time, official time in Uruguay will be at GMT -2.
1730Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1731Rule Uruguay 2006 only - Mar 12 2:00 0 -
1732# From Jesper N��rgaard Welen (2006-09-06):
1733# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1734#
1735# From Steffen Thorsen (2015-06-30):
1736# ... it looks like they will not be using DST the coming summer:
1737# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
1738# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/
1739# From Paul Eggert (2015-06-30):
1740# Apparently restaurateurs complained that DST caused people to go to the beach
1741# instead of out to dinner.
1742# From Pablo Camargo (2015-07-13):
1743# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
1744# [dated 2015-06-29; repeals Decree 311/006 dated 2006-09-04]
1745Rule Uruguay 2006 2014 - Oct Sun>=1 2:00 1:00 S
1746Rule Uruguay 2007 2015 - Mar Sun>=8 2:00 0 -
1738# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1747
1748# This Zone can be simplified once we assume zic %z.
1749Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1750 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1741 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1742 -3:00 Uruguay UY%sT
1751 -3:30 Uruguay -0330/-03 1942 Dec 14
1752 -3:00 Uruguay -03/-02 1968
1753 -3:00 Uruguay -03/-0230 1971
1754 -3:00 Uruguay -03/-02 1974
1755 -3:00 Uruguay -03/-0230 1974 Dec 22
1756 -3:00 Uruguay -03/-02
1757
1758# Venezuela
1759#
1760# From Paul Eggert (2015-07-28):
1761# For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533
1762# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf
1763#
1764# From John Stainforth (2007-11-28):
1765# ... the change for Venezuela originally expected for 2007-12-31 has
1766# been brought forward to 2007-12-09. The official announcement was
1767# published today in the "Gaceta Oficial de la Rep��blica Bolivariana
1768# de Venezuela, n��mero 38.819" (official document for all laws or
1769# resolution publication)
1770# http://www.globovision.com/news.php?nid=72208
1771
1772# From Alexander Krivenyshev (2016-04-15):
1773# https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino
1774#
1775# From Paul Eggert (2016-04-15):
1776# Clocks advance 30 minutes on 2016-05-01 at 02:30....
1777# "'Venezuela's new time-zone: hours without light, hours without water,
1778# hours of presidential broadcasts, hours of lines,' quipped comedian
1779# Jean Mary Curr�� ...". See: Cawthorne A, Kai D. Venezuela scraps
1780# half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400
1767# http://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE
1781# https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE
1782#
1783# From Matt Johnson (2016-04-20):
1784# ... published in the official Gazette [2016-04-18], here:
1785# http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf
1786
1787# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1788Zone America/Caracas -4:27:44 - LMT 1890
1789 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1776 -4:30 - VET 1965 Jan 1 0:00 # Venezuela T.
1777 -4:00 - VET 2007 Dec 9 3:00
1778 -4:30 - VET 2016 May 1 2:30
1779 -4:00 - VET
1790 -4:30 - -0430 1965 Jan 1 0:00
1791 -4:00 - -04 2007 Dec 9 3:00
1792 -4:30 - -0430 2016 May 1 2:30
1793 -4:00 - -04