1# <pre>
2# This file is in the public domain, so clarified as of
3# 2009-05-17 by Arthur David Olson.
4
5# This data is by no means authoritative; if you think you know better,
6# go ahead and edit the file (and please send any changes to
7# tz@iana.org for general use in the future).
8
9# From Paul Eggert (2006-03-22):
10# A good source for time zone historical data outside the U.S. is
11# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
12# San Diego: ACS Publications, Inc. (2003).
13#
14# Gwillim Law writes that a good source
15# for recent time zone data is the International Air Transport
16# Association's Standard Schedules Information Manual (IATA SSIM),
17# published semiannually. Law sent in several helpful summaries
18# of the IATA's data after 1990.
19#
20# Except where otherwise noted, Shanks & Pottenger is the source for
21# entries through 1990, and IATA SSIM is the source for entries afterwards.
22#
23# Earlier editions of these tables used the North American style (e.g. ARST and
24# ARDT for Argentine Standard and Daylight Time), but the following quote
25# suggests that it's better to use European style (e.g. ART and ARST).
26# I suggest the use of _Summer time_ instead of the more cumbersome
27# _daylight-saving time_. _Summer time_ seems to be in general use
28# in Europe and South America.
29# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
30# H L Mencken, _The American Language: Supplement I_ (1960), p 466
31#
32# Earlier editions of these tables also used the North American style
33# for time zones in Brazil, but this was incorrect, as Brazilians say
34# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
35# the railroad sector, writes (1999-07-06):
36# The subject of time zones is currently a matter of discussion/debate in
37# Brazil. Let's say that "the Brasilia time" is considered the
38# "official time" because Brasilia is the capital city.
39# The other three time zones are called "Brasilia time "minus one" or
40# "plus one" or "plus two". As far as I know there is no such
41# name/designation as "Eastern Time" or "Central Time".
42# So I invented the following (English-language) abbreviations for now.
43# Corrections are welcome!
44# std dst
45# -2:00 FNT FNST Fernando de Noronha
46# -3:00 BRT BRST Brasilia
47# -4:00 AMT AMST Amazon
48# -5:00 ACT ACST Acre
49
50###############################################################################
51
52###############################################################################
53
54# Argentina
55
56# From Bob Devine (1988-01-28):
57# Argentina: first Sunday in October to first Sunday in April since 1976.
58# Double Summer time from 1969 to 1974. Switches at midnight.
59
60# From U. S. Naval Observatory (1988-01-199):
61# ARGENTINA 3 H BEHIND UTC
62
63# From Hernan G. Otero (1995-06-26):
64# I am sending modifications to the Argentine time zone table...
65# AR was chosen because they are the ISO letters that represent Argentina.
66
67# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
68Rule Arg 1930 only - Dec 1 0:00 1:00 S
69Rule Arg 1931 only - Apr 1 0:00 0 -
70Rule Arg 1931 only - Oct 15 0:00 1:00 S
71Rule Arg 1932 1940 - Mar 1 0:00 0 -
72Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
73Rule Arg 1940 only - Jul 1 0:00 1:00 S
74Rule Arg 1941 only - Jun 15 0:00 0 -
75Rule Arg 1941 only - Oct 15 0:00 1:00 S
76Rule Arg 1943 only - Aug 1 0:00 0 -
77Rule Arg 1943 only - Oct 15 0:00 1:00 S
78Rule Arg 1946 only - Mar 1 0:00 0 -
79Rule Arg 1946 only - Oct 1 0:00 1:00 S
80Rule Arg 1963 only - Oct 1 0:00 0 -
81Rule Arg 1963 only - Dec 15 0:00 1:00 S
82Rule Arg 1964 1966 - Mar 1 0:00 0 -
83Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
84Rule Arg 1967 only - Apr 2 0:00 0 -
85Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
86Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
87Rule Arg 1974 only - Jan 23 0:00 1:00 S
88Rule Arg 1974 only - May 1 0:00 0 -
89Rule Arg 1988 only - Dec 1 0:00 1:00 S
90#
91# From Hernan G. Otero (1995-06-26):
92# These corrections were contributed by InterSoft Argentina S.A.,
93# obtaining the data from the:
94# Talleres de Hidrografia Naval Argentina
95# (Argentine Naval Hydrography Institute)
96Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
97Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
98#
99# From Hernan G. Otero (1995-06-26):
100# From this moment on, the law that mandated the daylight saving
101# time corrections was derogated and no more modifications
102# to the time zones (for daylight saving) are now made.
103#
104# From Rives McDow (2000-01-10):
105# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
106# which did not result in the switch of a time zone, as they stayed 9 hours
107# from the International Date Line.
108Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
109# From Paul Eggert (2007-12-28):
110# DST was set to expire on March 5, not March 3, but since it was converted
111# to standard time on March 3 it's more convenient for us to pretend that
112# it ended on March 3.
113Rule Arg 2000 only - Mar 3 0:00 0 -
114#
115# From Peter Gradelski via Steffen Thorsen (2000-03-01):
116# We just checked with our Sao Paulo office and they say the government of
117# Argentina decided not to become one of the countries that go on or off DST.
118# So Buenos Aires should be -3 hours from GMT at all times.
119#
120# From Fabian L. Arce Jofre (2000-04-04):
121# The law that claimed DST for Argentina was derogated by President Fernando
122# de la Rua on March 2, 2000, because it would make people spend more energy
123# in the winter time, rather than less. The change took effect on March 3.
124#
125# From Mariano Absatz (2001-06-06):
126# one of the major newspapers here in Argentina said that the 1999
127# Timezone Law (which never was effectively applied) will (would?) be
128# in effect.... The article is at
129# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
130# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
131# 1999-09-17, and published 1999-09-21. The official publication is at:
132# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
133# Regretfully, you have to subscribe (and pay) for the on-line version....
134#
135# (2001-06-12):
136# the timezone for Argentina will not change next Sunday.
137# Apparently it will do so on Sunday 24th....
138# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
139#
140# (2001-06-25):
141# Last Friday (yes, the last working day before the date of the change), the
142# Senate annulled the 1999 law that introduced the changes later postponed.
143# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
144# It remains the vote of the Deputies..., but it will be the same....
145# This kind of things had always been done this way in Argentina.
146# We are still -03:00 all year round in all of the country.
147#
148# From Steffen Thorsen (2007-12-21):
149# A user (Leonardo Chaim) reported that Argentina will adopt DST....
150# all of the country (all Zone-entries) are affected. News reports like
151# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
152# that Argentina will use DST next year as well, from October to
153# March, although exact rules are not given.
154#
155# From Jesper Norgaard Welen (2007-12-26)
156# The last hurdle of Argentina DST is over, the proposal was approved in
157# the lower chamber too (Deputados) with a vote 192 for and 2 against.
158# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
159# the original scanned proposal, where the dates and the zero hours are
160# clear and unambiguous...This is the article about final approval:
161# <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
162# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
163# </a>
164#
165# From Paul Eggert (2007-12-22):
166# For dates after mid-2008, the following rules are my guesses and
167# are quite possibly wrong, but are more likely than no DST at all.
168
169# From Alexander Krivenyshev (2008-09-05):
170# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
171# Argentina will start DST on Sunday October 19, 2008.
172#
173# <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html">
174# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
175# </a>
176# OR
177# <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)">
178# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
179# </a>
180
181# From Rodrigo Severo (2008-10-06):
182# Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
183# ...
184# ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
185# Hi, there is a problem with timezone-data-2008e and maybe with
186# timezone-data-2008f
187# Argentinian law [Number] 25.155 is no longer valid.
188# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm">
189# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
190# </a>
191# The new one is law [Number] 26.350
192# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm">
193# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
194# </a>
195# So there is no summer time in Argentina for now.
196
197# From Mariano Absatz (2008-10-20):
198# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina
199# From 2008-10-19 until 2009-03-15
200# <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01">
201# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
202# </a>
203#
204# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 2008/2009:
205# Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La Pampa, Neuquen, Rio Negro, Chubut, Santa Cruz
206# and Tierra del Fuego
207# <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01">
208# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
209# </a>
210#
211# Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying
212# it will not apply DST either (even when it was not included in Decree 1705/2008)
213# <a href="http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc">
214# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
215# </a>
216
217# From fullinet (2009-10-18):
218# As announced in
219# <a hef="http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356">
220# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
221# </a>
222# (an official .gob.ar) under title: "Sin Cambio de Hora" (english: "No hour change")
223#
224# "Por el momento, el Gobierno Nacional resolvio no modificar la hora
225# oficial, decision que estaba en estudio para su implementacion el
226# domingo 18 de octubre. Desde el Ministerio de Planificacion se anuncio
227# que la Argentina hoy, en estas condiciones meteorologicas, no necesita
228# la modificacion del huso horario, ya que 2009 nos encuentra con
229# crecimiento en la produccion y distribucion energetica."
230
231Rule Arg 2007 only - Dec 30 0:00 1:00 S
232Rule Arg 2008 2009 - Mar Sun>=15 0:00 0 -
233Rule Arg 2008 only - Oct Sun>=15 0:00 1:00 S
234
235# From Mariano Absatz (2004-05-21):
236# Today it was officially published that the Province of Mendoza is changing
237# its timezone this winter... starting tomorrow night....
238# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
239# From Paul Eggert (2004-05-24):
240# It's Law No. 7,210. This change is due to a public power emergency, so for
241# now we'll assume it's for this year only.
242#
243# From Paul Eggert (2006-03-22):
244# <a href="http://www.spicasc.net/horvera.html">
245# Hora de verano para la Republica Argentina (2003-06-08)
246# </a> says that standard time in Argentina from 1894-10-31
247# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
248# over Shanks & Pottenger.
249#
250# From Mariano Absatz (2004-06-05):
251# These media articles from a major newspaper mostly cover the current state:
252# http://www.lanacion.com.ar/04/05/27/de_604825.asp
253# http://www.lanacion.com.ar/04/05/28/de_605203.asp
254#
255# The following eight (8) provinces pulled clocks back to UTC-04:00 at
256# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
257# Apparently, all nine provinces would go back to UTC-03:00 at the same
258# time in October 17th.
259#
260# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
261# Tierra del Fuego, Tucuman.
262#
263# From Mariano Absatz (2004-06-14):
264# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
265# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
266# annoyance with the change is much higher than the power savings obtained....
267#
268# From Gwillim Law (2004-06-14):
269# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
270# "The time change in Tierra del Fuego was a conflicted decision from
271# the start. The government had decreed that the measure would take
272# effect on June 1, but a normative error forced the new time to begin
273# three days earlier, from a Saturday to a Sunday....
274# Our understanding was that the change was originally scheduled to take place
275# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
276# provinces). Sunday was May 30, only two days earlier. So the article
277# contains a contradiction. I would give more credence to the Saturday/Sunday
278# date than the "three days earlier" phrase, and conclude that Tierra del
279# Fuego set its clocks back at 2004-05-30 00:00.
280#
281# From Steffen Thorsen (2004-10-05):
282# The previous law 7210 which changed the province of Mendoza's time zone
283# back in May have been modified slightly in a new law 7277, which set the
284# new end date to 2004-09-26 (original date was 2004-10-17).
285# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
286#
287# From Mariano Absatz (2004-10-05):
288# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
289# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
290# at midnight between Saturday, July 24th and Sunday, July 25th....
291# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
292# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
293# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
294
295# From Alex Krivenyshev (2008-01-17):
296# Here are articles that Argentina Province San Luis is planning to end DST
297# as earlier as upcoming Monday January 21, 2008 or February 2008:
298#
299# Provincia argentina retrasa reloj y marca diferencia con resto del pais
300# (Argentine Province delayed clock and mark difference with the rest of the
301# country)
302# <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
303# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
304# </a>
305#
306# Es inminente que en San Luis atrasen una hora los relojes
307# (It is imminent in San Luis clocks one hour delay)
308# <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
309# http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
310# </a>
311#
312# <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
313# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
314# </a>
315
316# From Jesper Norgaard Welen (2008-01-18):
317# The page of the San Luis provincial government
318# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
319# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
320# </a>
321# confirms what Alex Krivenyshev has earlier sent to the tz
322# emailing list about that San Luis plans to return to standard
323# time much earlier than the rest of the country. It also
324# confirms that upon request the provinces San Juan and Mendoza
325# refused to follow San Luis in this change.
326#
327# The change is supposed to take place Monday the 21.st at 0:00
328# hours. As far as I understand it if this goes ahead, we need
329# a new timezone for San Luis (although there are also documented
330# independent changes in the southamerica file of San Luis in
331# 1990 and 1991 which has not been confirmed).
332
333# From Jesper Norgaard Welen (2008-01-25):
334# Unfortunately the below page has become defunct, about the San Luis
335# time change. Perhaps because it now is part of a group of pages "Most
336# important pages of 2008."
337#
338# You can use
339# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
340# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
341# </a>
342# instead it seems. Or use "Buscador" from the main page of the San Luis
343# government, and fill in "huso" and click OK, and you will get 3 pages
344# from which the first one is identical to the above.
345
346# From Mariano Absatz (2008-01-28):
347# I can confirm that the Province of San Luis (and so far only that
348# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
349# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
350# 1 hour), and they intend to keep UTC-3 as their timezone all year round
351# (that is, unless they change their mind any minute now).
352#
353# So we'll have to add yet another city to 'southamerica' (I think San
354# Luis city is the mos populated city in the Province, so it'd be
355# America/Argentina/San_Luis... of course I can't remember if San Luis's
356# history of particular changes goes along with Mendoza or San Juan :-(
357# (I only remember not being able to collect hard facts about San Luis
358# back in 2004, when these provinces changed to UTC-4 for a few days, I
359# mailed them personally and never got an answer).
360
361# From Paul Eggert (2008-06-30):
362# Unless otherwise specified, data are from Shanks & Pottenger through 1992,
363# from the IATA otherwise. As noted below, Shanks & Pottenger say that
364# America/Cordoba split into 6 subregions during 1991/1992, one of which
365# was America/San_Luis, but we haven't verified this yet so for now we'll
366# keep America/Cordoba a single region rather than splitting it into the
367# other 5 subregions.
368
369# From Mariano Absatz (2009-03-13):
370# Yesterday (with our usual 2-day notice) the Province of San Luis
371# decided that next Sunday instead of "staying" @utc-03:00 they will go
372# to utc-04:00 until the second Saturday in October...
373#
374# The press release is at
375# <a href="http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102">
376# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
377# </a>
378# (I couldn't find the decree, but
379# <a href="http://www.sanluis.gov.ar">
380# www.sanluis.gov.ar
381# <a/>
382# is the official page for the Province Government).
383#
384# There's also a note in only one of the major national papers (La Naci�n) at
385# <a href="http://www.lanacion.com.ar/nota.asp?nota_id=1107912">
386# http://www.lanacion.com.ar/nota.asp?nota_id=1107912
387# </a>
388#
389# The press release says:
390# (...) anunci� que el pr�ximo domingo a las 00:00 los puntanos deber�n
391# atrasar una hora sus relojes.
392#
393# A partir de entonces, San Luis establecer� el huso horario propio de
394# la Provincia. De esta manera, durante el periodo del calendario anual
395# 2009, el cambio horario quedar� comprendido entre las 00:00 del tercer
396# domingo de marzo y las 24:00 del segundo s�bado de octubre.
397# Quick&dirty translation
398# (...) announced that next Sunday, at 00:00, Puntanos (the San Luis
399# inhabitants) will have to turn back one hour their clocks
400#
401# Since then, San Luis will establish its own Province timezone. Thus,
402# during 2009, this timezone change will run from 00:00 the third Sunday
403# in March until 24:00 of the second Saturday in October.
404
405# From Mariano Absatz (2009-10-16):
406# ...the Province of San Luis is a case in itself.
407#
408# The Law at
409# <a href="http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276>"
410# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
411# </a>
412# is ambiguous because establishes a calendar from the 2nd Sunday in
413# October at 0:00 thru the 2nd Saturday in March at 24:00 and the
414# complement of that starting on the 2nd Sunday of March at 0:00 and
415# ending on the 2nd Saturday of March at 24:00.
416#
417# This clearly breaks every time the 1st of March or October is a Sunday.
418#
419# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
420# Sunday of October and March.
421#
422# The problem is that the changes in the rest of the Provinces that did
423# change in 2007/2008, were made according to the Federal Law and Decrees
424# that did so on the 3rd Sunday of October and March.
425#
426# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
427# (October 11th) at 0:00.
428#
429# So I guess a new set of rules, besides "Arg", must be made and the last
430# America/Argentina/San_Luis entries should change to use these...
431#
432# I'm enclosing a patch that does what I say... regretfully, the San Luis
433# timezone must be called "WART/WARST" even when most of the time (like,
434# right now) WARST == ART... that is, since last Sunday, all the country
435# is using UTC-3, but in my patch, San Luis calls it "WARST" and the rest
436# of the country calls it "ART".
437# ...
438
439# From Alexander Krivenyshev (2010-04-09):
440# According to news reports from El Diario de la Republica Province San
441# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
442# after April 11, 2010--will continue to have same time as rest of
443# Argentina (UTC-3) (no DST).
444#
445# Confirmaron la pr&oacute;rroga del huso horario de verano (Spanish)
446# <a href="http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9">
447# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
448# </a>
449# or (some English translation):
450# <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina08.html">
451# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
452# </a>
453
454# From Mariano Absatz (2010-04-12):
455# yes...I can confirm this...and given that San Luis keeps calling
456# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
457# rules...San Luis is still using "Western ARgentina Time" and it got
458# stuck on Summer daylight savings time even though the summer is over.
459
460# Zone NAME GMTOFF RULES FORMAT [UNTIL]
461#
462# Buenos Aires (BA), Capital Federal (CF),
463Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
464 -4:16:48 - CMT 1920 May # Cordoba Mean Time
465 -4:00 - ART 1930 Dec
466 -4:00 Arg AR%sT 1969 Oct 5
467 -3:00 Arg AR%sT 1999 Oct 3
468 -4:00 Arg AR%sT 2000 Mar 3
469 -3:00 Arg AR%sT
470#
471# Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),
472# Chaco (CC), Formosa (FM), Santiago del Estero (SE)
473#
474# Shanks & Pottenger also make the following claims, which we haven't verified:
475# - Formosa switched to -3:00 on 1991-01-07.
476# - Misiones switched to -3:00 on 1990-12-29.
477# - Chaco switched to -3:00 on 1991-01-04.
478# - Santiago del Estero switched to -4:00 on 1991-04-01,
479# then to -3:00 on 1991-04-26.
480#
481Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
482 -4:16:48 - CMT 1920 May
483 -4:00 - ART 1930 Dec
484 -4:00 Arg AR%sT 1969 Oct 5
485 -3:00 Arg AR%sT 1991 Mar 3
486 -4:00 - WART 1991 Oct 20
487 -3:00 Arg AR%sT 1999 Oct 3
488 -4:00 Arg AR%sT 2000 Mar 3
489 -3:00 Arg AR%sT
490#
491# Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
492Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
493 -4:16:48 - CMT 1920 May
494 -4:00 - ART 1930 Dec
495 -4:00 Arg AR%sT 1969 Oct 5
496 -3:00 Arg AR%sT 1991 Mar 3
497 -4:00 - WART 1991 Oct 20
498 -3:00 Arg AR%sT 1999 Oct 3
499 -4:00 Arg AR%sT 2000 Mar 3
500 -3:00 Arg AR%sT 2008 Oct 18
501 -3:00 - ART
502#
503# Tucuman (TM)
504Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
505 -4:16:48 - CMT 1920 May
506 -4:00 - ART 1930 Dec
507 -4:00 Arg AR%sT 1969 Oct 5
508 -3:00 Arg AR%sT 1991 Mar 3
509 -4:00 - WART 1991 Oct 20
510 -3:00 Arg AR%sT 1999 Oct 3
511 -4:00 Arg AR%sT 2000 Mar 3
512 -3:00 - ART 2004 Jun 1
513 -4:00 - WART 2004 Jun 13
514 -3:00 Arg AR%sT
515#
516# La Rioja (LR)
517Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
518 -4:16:48 - CMT 1920 May
519 -4:00 - ART 1930 Dec
520 -4:00 Arg AR%sT 1969 Oct 5
521 -3:00 Arg AR%sT 1991 Mar 1
522 -4:00 - WART 1991 May 7
523 -3:00 Arg AR%sT 1999 Oct 3
524 -4:00 Arg AR%sT 2000 Mar 3
525 -3:00 - ART 2004 Jun 1
526 -4:00 - WART 2004 Jun 20
527 -3:00 Arg AR%sT 2008 Oct 18
528 -3:00 - ART
529#
530# San Juan (SJ)
531Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
532 -4:16:48 - CMT 1920 May
533 -4:00 - ART 1930 Dec
534 -4:00 Arg AR%sT 1969 Oct 5
535 -3:00 Arg AR%sT 1991 Mar 1
536 -4:00 - WART 1991 May 7
537 -3:00 Arg AR%sT 1999 Oct 3
538 -4:00 Arg AR%sT 2000 Mar 3
539 -3:00 - ART 2004 May 31
540 -4:00 - WART 2004 Jul 25
541 -3:00 Arg AR%sT 2008 Oct 18
542 -3:00 - ART
543#
544# Jujuy (JY)
545Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
546 -4:16:48 - CMT 1920 May
547 -4:00 - ART 1930 Dec
548 -4:00 Arg AR%sT 1969 Oct 5
549 -3:00 Arg AR%sT 1990 Mar 4
550 -4:00 - WART 1990 Oct 28
551 -4:00 1:00 WARST 1991 Mar 17
552 -4:00 - WART 1991 Oct 6
553 -3:00 1:00 ARST 1992
554 -3:00 Arg AR%sT 1999 Oct 3
555 -4:00 Arg AR%sT 2000 Mar 3
556 -3:00 Arg AR%sT 2008 Oct 18
557 -3:00 - ART
558#
559# Catamarca (CT), Chubut (CH)
560Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
561 -4:16:48 - CMT 1920 May
562 -4:00 - ART 1930 Dec
563 -4:00 Arg AR%sT 1969 Oct 5
564 -3:00 Arg AR%sT 1991 Mar 3
565 -4:00 - WART 1991 Oct 20
566 -3:00 Arg AR%sT 1999 Oct 3
567 -4:00 Arg AR%sT 2000 Mar 3
568 -3:00 - ART 2004 Jun 1
569 -4:00 - WART 2004 Jun 20
570 -3:00 Arg AR%sT 2008 Oct 18
571 -3:00 - ART
572#
573# Mendoza (MZ)
574Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
575 -4:16:48 - CMT 1920 May
576 -4:00 - ART 1930 Dec
577 -4:00 Arg AR%sT 1969 Oct 5
578 -3:00 Arg AR%sT 1990 Mar 4
579 -4:00 - WART 1990 Oct 15
580 -4:00 1:00 WARST 1991 Mar 1
581 -4:00 - WART 1991 Oct 15
582 -4:00 1:00 WARST 1992 Mar 1
583 -4:00 - WART 1992 Oct 18
584 -3:00 Arg AR%sT 1999 Oct 3
585 -4:00 Arg AR%sT 2000 Mar 3
586 -3:00 - ART 2004 May 23
587 -4:00 - WART 2004 Sep 26
588 -3:00 Arg AR%sT 2008 Oct 18
589 -3:00 - ART
590#
591# San Luis (SL)
592
593Rule SanLuis 2008 2009 - Mar Sun>=8 0:00 0 -
594Rule SanLuis 2007 2009 - Oct Sun>=8 0:00 1:00 S
595
596Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
597 -4:16:48 - CMT 1920 May
598 -4:00 - ART 1930 Dec
599 -4:00 Arg AR%sT 1969 Oct 5
600 -3:00 Arg AR%sT 1990
601 -3:00 1:00 ARST 1990 Mar 14
602 -4:00 - WART 1990 Oct 15
603 -4:00 1:00 WARST 1991 Mar 1
604 -4:00 - WART 1991 Jun 1
605 -3:00 - ART 1999 Oct 3
606 -4:00 1:00 WARST 2000 Mar 3
607 -3:00 - ART 2004 May 31
608 -4:00 - WART 2004 Jul 25
609 -3:00 Arg AR%sT 2008 Jan 21
610 -4:00 SanLuis WAR%sT
611#
612# Santa Cruz (SC)
613Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
614 -4:16:48 - CMT 1920 May # Cordoba Mean Time
615 -4:00 - ART 1930 Dec
616 -4:00 Arg AR%sT 1969 Oct 5
617 -3:00 Arg AR%sT 1999 Oct 3
618 -4:00 Arg AR%sT 2000 Mar 3
619 -3:00 - ART 2004 Jun 1
620 -4:00 - WART 2004 Jun 20
621 -3:00 Arg AR%sT 2008 Oct 18
622 -3:00 - ART
623#
624# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
625Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
626 -4:16:48 - CMT 1920 May # Cordoba Mean Time
627 -4:00 - ART 1930 Dec
628 -4:00 Arg AR%sT 1969 Oct 5
629 -3:00 Arg AR%sT 1999 Oct 3
630 -4:00 Arg AR%sT 2000 Mar 3
631 -3:00 - ART 2004 May 30
632 -4:00 - WART 2004 Jun 20
633 -3:00 Arg AR%sT 2008 Oct 18
634 -3:00 - ART
635
636# Aruba
637# Zone NAME GMTOFF RULES FORMAT [UNTIL]
638Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
639 -4:30 - ANT 1965 # Netherlands Antilles Time
640 -4:00 - AST
641
642# Bolivia
643# Zone NAME GMTOFF RULES FORMAT [UNTIL]
644Zone America/La_Paz -4:32:36 - LMT 1890
645 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
646 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
647 -4:00 - BOT # Bolivia Time
648
649# Brazil
650
651# From Paul Eggert (1993-11-18):
652# The mayor of Rio recently attempted to change the time zone rules
653# just in his city, in order to leave more summer time for the tourist trade.
654# The rule change lasted only part of the day;
655# the federal government refused to follow the city's rules, and business
656# was in a chaos, so the mayor backed down that afternoon.
657
658# From IATA SSIM (1996-02):
659# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
660# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
661# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
662# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
663# [The last three states are new to this issue of the IATA SSIM.]
664
665# From Gwillim Law (1996-10-07):
666# Geography, history (Tocantins was part of Goias until 1989), and other
667# sources of time zone information lead me to believe that AL, SE, and TO were
668# always in BR1, and so the only change was whether or not they observed DST....
669# The earliest issue of the SSIM I have is 2/91. Each issue from then until
670# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
671# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
672# (UTC-4).... The other two time zones given for Brazil are BR3, which is
673# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
674# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
675# become part of the state of Pernambuco). The boundary between BR1 and BR2
676# has never been clearly stated. They've simply been called East and West.
677# However, some conclusions can be drawn from another IATA manual: the Airline
678# Coding Directory, which lists close to 400 airports in Brazil. For each
679# airport it gives a time zone which is coded to the SSIM. From that
680# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
681# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
682# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
683
684# From Marcos Tadeu (1998-09-27):
685# <a href="http://pcdsh01.on.br/verao1.html">
686# Brazilian official page
687# </a>
688
689# From Jesper Norgaard (2000-11-03):
690# [For an official list of which regions in Brazil use which time zones, see:]
691# http://pcdsh01.on.br/Fusbr.htm
692# http://pcdsh01.on.br/Fusbrhv.htm
693
694# From Celso Doria via David Madeo (2002-10-09):
695# The reason for the delay this year has to do with elections in Brazil.
696#
697# Unlike in the United States, elections in Brazil are 100% computerized and
698# the results are known almost immediately. Yesterday, it was the first
699# round of the elections when 115 million Brazilians voted for President,
700# Governor, Senators, Federal Deputies, and State Deputies. Nobody is
701# counting (or re-counting) votes anymore and we know there will be a second
702# round for the Presidency and also for some Governors. The 2nd round will
703# take place on October 27th.
704#
705# The reason why the DST will only begin November 3rd is that the thousands
706# of electoral machines used cannot have their time changed, and since the
707# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
708# the Government decided to postpone DST, instead of changing the Constitution
709# (maybe, for the next elections, it will be possible to change the clock)...
710
711# From Rodrigo Severo (2004-10-04):
712# It's just the biannual change made necessary by the much hyped, supposedly
713# modern Brazilian eletronic voting machines which, apparently, can't deal
714# with a time change between the first and the second rounds of the elections.
715
716# From Steffen Thorsen (2007-09-20):
717# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
718# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
719
720# From Paul Schulze (2008-06-24):
721# ...by law number 11.662 of April 24, 2008 (published in the "Diario
722# Oficial da Uniao"...) in Brazil there are changes in the timezones,
723# effective today (00:00am at June 24, 2008) as follows:
724#
725# a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
726# part of the Amazonas state that had this timezone now being put to the
727# timezone UTC+4
728# b) The whole Para state now is put at timezone UTC+3, instead of just
729# part of it, as was before.
730#
731# This change follows a proposal of senator Tiao Viana of Acre state, that
732# proposed it due to concerns about open television channels displaying
733# programs inappropriate to youths in the states that had the timezone
734# UTC+5 too early in the night. In the occasion, some more corrections
735# were proposed, trying to unify the timezones of any given state. This
736# change modifies timezone rules defined in decree 2.784 of 18 June,
737# 1913.
738
739# From Rodrigo Severo (2008-06-24):
740# Just correcting the URL:
741# <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008">
742# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
743# </a>
744#
745# As a result of the above Decree I believe the America/Rio_Branco
746# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
747# be created to represent the...west side of the Para State. I
748# suggest this new timezone be called Santarem as the most
749# important/populated city in the affected area.
750#
751# This new timezone would be the same as the Rio_Branco timezone up to
752# the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
753
754# From Alex Krivenyshev (2008-06-24):
755# This is a quick reference page for New and Old Brazil Time Zones map.
756# <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
757# http://www.worldtimezone.com/brazil-time-new-old.php
758# </a>
759#
760# - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
761# (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
762# part of Par state is moving to one timezone UTC- 03 (from UTC -04).
763
764# From Paul Eggert (2002-10-10):
765# The official decrees referenced below are mostly taken from
766# <a href="http://pcdsh01.on.br/DecHV.html">
767# Decretos sobre o Horario de Verao no Brasil
768# </a>.
769
770# From Steffen Thorsen (2008-08-29):
771# As announced by the government and many newspapers in Brazil late
772# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
773# it will end on 2009-02-15 (current rule for Brazil is fine). Based on
774# past years experience with the elections, there was a good chance that
775# the start was postponed to November, but it did not happen this year.
776#
777# It has not yet been posted to http://pcdsh01.on.br/DecHV.html
778#
779# An official page about it:
780# <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
781# http://www.mme.gov.br/site/news/detail.do?newsId=16722
782# </a>
783# Note that this link does not always work directly, but must be accessed
784# by going to
785# <a href="http://www.mme.gov.br/first">
786# http://www.mme.gov.br/first
787# </a>
788#
789# One example link that works directly:
790# <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
791# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
792# (Portuguese)
793# </a>
794#
795# We have a written a short article about it as well:
796# <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
797# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
798# </a>
799#
800# From Alexander Krivenyshev (2011-10-04):
801# State Bahia will return to Daylight savings time this year after 8 years off.
802# The announcement was made by Governor Jaques Wagner in an interview to a
803# television station in Salvador.
804
805# In Portuguese:
806# <a href="http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html">
807# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
808# </a> and
809# <a href="http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html">
810# http://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
811# </a>
812
813# From Guilherme Bernardes Rodrigues (2011-10-07):
814# There is news in the media, however there is still no decree about it.
815# I just send a e-mail to Zulmira Brand�o at
816# <a href="http://pcdsh01.on.br/">http://pcdsh01.on.br/</a> the
817# oficial agency about time in Brazil, and she confirmed that the old rule is
818# still in force.
819
820# From Guilherme Bernardes Rodrigues (2011-10-14)
821# It's official, the President signed a decree that includes Bahia in summer
822# time.
823# [ and in a second message (same day): ]
824# I found the decree.
825#
826# DECRETO No- 7.584, DE 13 DE OUTUBRO DE 2011
827# Link :
828# <a href="http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6">
829# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
830# </a>
831
832# From Kelley Cook (2012-10-16):
833# The governor of state of Bahia in Brazil announced on Thursday that
834# due to public pressure, he is reversing the DST policy they implemented
835# last year and will not be going to Summer Time on October 21st....
836# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
837
838# From Rodrigo Severo (2012-10-16):
839# Tocantins state will have DST.
840# http://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
841
842# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
843# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
844# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
845Rule Brazil 1931 only - Oct 3 11:00 1:00 S
846Rule Brazil 1932 1933 - Apr 1 0:00 0 -
847Rule Brazil 1932 only - Oct 3 0:00 1:00 S
848# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
849# revoked DST.
850# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
851# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
852Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
853Rule Brazil 1950 only - Apr 16 1:00 0 -
854Rule Brazil 1951 1952 - Apr 1 0:00 0 -
855# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
856Rule Brazil 1953 only - Mar 1 0:00 0 -
857# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
858# revoked DST.
859# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
860# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
861# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
862# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
863# extended the above decree to all of the national territory on 12-09.
864Rule Brazil 1963 only - Dec 9 0:00 1:00 S
865# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
866# extended summer time by one day to 1964-03-01 00:00 (start of school).
867Rule Brazil 1964 only - Mar 1 0:00 0 -
868# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
869Rule Brazil 1965 only - Jan 31 0:00 1:00 S
870Rule Brazil 1965 only - Mar 31 0:00 0 -
871# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
872Rule Brazil 1965 only - Dec 1 0:00 1:00 S
873# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
874Rule Brazil 1966 1968 - Mar 1 0:00 0 -
875Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
876# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
877# revoked DST.
878# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
879Rule Brazil 1985 only - Nov 2 0:00 1:00 S
880# Decree 92,310 (1986-01-21)
881# Decree 92,463 (1986-03-13)
882Rule Brazil 1986 only - Mar 15 0:00 0 -
883# Decree 93,316 (1986-10-01)
884Rule Brazil 1986 only - Oct 25 0:00 1:00 S
885Rule Brazil 1987 only - Feb 14 0:00 0 -
886# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
887Rule Brazil 1987 only - Oct 25 0:00 1:00 S
888Rule Brazil 1988 only - Feb 7 0:00 0 -
889# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
890# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
891Rule Brazil 1988 only - Oct 16 0:00 1:00 S
892Rule Brazil 1989 only - Jan 29 0:00 0 -
893# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
894# with the same exceptions
895Rule Brazil 1989 only - Oct 15 0:00 1:00 S
896Rule Brazil 1990 only - Feb 11 0:00 0 -
897# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
898# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
899# Decree 99,629 (1990-10-19) adds BA, MT.
900Rule Brazil 1990 only - Oct 21 0:00 1:00 S
901Rule Brazil 1991 only - Feb 17 0:00 0 -
902# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
903# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
904Rule Brazil 1991 only - Oct 20 0:00 1:00 S
905Rule Brazil 1992 only - Feb 9 0:00 0 -
906# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
907# adopted by same states.
908Rule Brazil 1992 only - Oct 25 0:00 1:00 S
909Rule Brazil 1993 only - Jan 31 0:00 0 -
910# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
911# adopted by same states, plus AM.
912# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
913# web page corrected 2004-01-07) adopted by same states, minus AM.
914# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
915# adopted by same states, plus MT and TO.
916# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
917# adds AL, SE.
918Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
919Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
920Rule Brazil 1996 only - Feb 11 0:00 0 -
921# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
922# adopted by same states, minus AL, SE.
923Rule Brazil 1996 only - Oct 6 0:00 1:00 S
924Rule Brazil 1997 only - Feb 16 0:00 0 -
925# From Daniel C. Sobral (1998-02-12):
926# In 1997, the DS began on October 6. The stated reason was that
927# because international television networks ignored Brazil's policy on DS,
928# they bought the wrong times on satellite for coverage of Pope's visit.
929# This year, the ending date of DS was postponed to March 1
930# to help dealing with the shortages of electric power.
931#
932# Decree 2,317 (1997-09-04), adopted by same states.
933Rule Brazil 1997 only - Oct 6 0:00 1:00 S
934# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
935# (1998-02-10)
936Rule Brazil 1998 only - Mar 1 0:00 0 -
937# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
938# adopted by the same states as before.
939Rule Brazil 1998 only - Oct 11 0:00 1:00 S
940Rule Brazil 1999 only - Feb 21 0:00 0 -
941# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
942# (1999-08-23) adopted by same states.
943# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
944# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
945Rule Brazil 1999 only - Oct 3 0:00 1:00 S
946Rule Brazil 2000 only - Feb 27 0:00 0 -
947# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
948# adopted by the same states as before.
949# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
950# repeals DST in PE and RR, effective 2000-10-15 00:00.
951# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
952# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
953# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
954# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
955Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
956Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
957# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
958# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
959Rule Brazil 2002 only - Nov 3 0:00 1:00 S
960# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
961# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
962Rule Brazil 2003 only - Oct 19 0:00 1:00 S
963# Decree 5,223 (2004-10-01) reestablishes DST in MT.
964# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
965Rule Brazil 2004 only - Nov 2 0:00 1:00 S
966# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
967# adopted by the same states as before.
968Rule Brazil 2005 only - Oct 16 0:00 1:00 S
969# Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
970# adopted by the same states as before.
971Rule Brazil 2006 only - Nov 5 0:00 1:00 S
972Rule Brazil 2007 only - Feb 25 0:00 0 -
973# Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
974# adopted by the same states as before.
975Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
976# From Frederico A. C. Neves (2008-09-10):
977# Acording to this decree
978# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
979# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
980# </a>
981# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
982# 3rd Feb Sunday. There is an exception on the return date when this is
983# the Carnival Sunday then the return date will be the next Sunday...
984Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
985Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
986Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
987Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
988Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
989Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
990Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
991Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
992Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
993Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
994Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
995Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
996Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
997# From Arthur David Olson (2008-09-29):
998# The next is wrong in some years but is better than nothing.
999Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
1000
1001# The latest ruleset listed above says that the following states observe DST:
1002# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
1003
1004# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1005#
1006# Fernando de Noronha (administratively part of PE)
1007Zone America/Noronha -2:09:40 - LMT 1914
1008 -2:00 Brazil FN%sT 1990 Sep 17
1009 -2:00 - FNT 1999 Sep 30
1010 -2:00 Brazil FN%sT 2000 Oct 15
1011 -2:00 - FNT 2001 Sep 13
1012 -2:00 Brazil FN%sT 2002 Oct 1
1013 -2:00 - FNT
1014# Other Atlantic islands have no permanent settlement.
1015# These include Trindade and Martin Vaz (administratively part of ES),
1016# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
1017# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
1018# it also included the Penedos.
1019#
1020# Amapa (AP), east Para (PA)
1021# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
1022# The division between east and west Para is the river Xingu.
1023# In the north a very small part from the river Javary (now Jari I guess,
1024# the border with Amapa) to the Amazon, then to the Xingu.
1025Zone America/Belem -3:13:56 - LMT 1914
1026 -3:00 Brazil BR%sT 1988 Sep 12
1027 -3:00 - BRT
1028#
1029# west Para (PA)
1030# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
1031Zone America/Santarem -3:38:48 - LMT 1914
1032 -4:00 Brazil AM%sT 1988 Sep 12
1033 -4:00 - AMT 2008 Jun 24 00:00
1034 -3:00 - BRT
1035#
1036# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
1037# Paraiba (PB)
1038Zone America/Fortaleza -2:34:00 - LMT 1914
1039 -3:00 Brazil BR%sT 1990 Sep 17
1040 -3:00 - BRT 1999 Sep 30
1041 -3:00 Brazil BR%sT 2000 Oct 22
1042 -3:00 - BRT 2001 Sep 13
1043 -3:00 Brazil BR%sT 2002 Oct 1
1044 -3:00 - BRT
1045#
1046# Pernambuco (PE) (except Atlantic islands)
1047Zone America/Recife -2:19:36 - LMT 1914
1048 -3:00 Brazil BR%sT 1990 Sep 17
1049 -3:00 - BRT 1999 Sep 30
1050 -3:00 Brazil BR%sT 2000 Oct 15
1051 -3:00 - BRT 2001 Sep 13
1052 -3:00 Brazil BR%sT 2002 Oct 1
1053 -3:00 - BRT
1054#
1055# Tocantins (TO)
1056Zone America/Araguaina -3:12:48 - LMT 1914
1057 -3:00 Brazil BR%sT 1990 Sep 17
1058 -3:00 - BRT 1995 Sep 14
1059 -3:00 Brazil BR%sT 2003 Sep 24
1060 -3:00 - BRT 2012 Oct 21
1061 -3:00 Brazil BR%sT
1062#
1063# Alagoas (AL), Sergipe (SE)
1064Zone America/Maceio -2:22:52 - LMT 1914
1065 -3:00 Brazil BR%sT 1990 Sep 17
1066 -3:00 - BRT 1995 Oct 13
1067 -3:00 Brazil BR%sT 1996 Sep 4
1068 -3:00 - BRT 1999 Sep 30
1069 -3:00 Brazil BR%sT 2000 Oct 22
1070 -3:00 - BRT 2001 Sep 13
1071 -3:00 Brazil BR%sT 2002 Oct 1
1072 -3:00 - BRT
1073#
1074# Bahia (BA)
1075# There are too many Salvadors elsewhere, so use America/Bahia instead
1076# of America/Salvador.
1077Zone America/Bahia -2:34:04 - LMT 1914
1078 -3:00 Brazil BR%sT 2003 Sep 24
1079 -3:00 - BRT 2011 Oct 16
1080 -3:00 Brazil BR%sT 2012 Oct 21
1081 -3:00 - BRT
1082#
1083# Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
1084# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
1085# Santa Catarina (SC), Rio Grande do Sul (RS)
1086Zone America/Sao_Paulo -3:06:28 - LMT 1914
1087 -3:00 Brazil BR%sT 1963 Oct 23 00:00
1088 -3:00 1:00 BRST 1964
1089 -3:00 Brazil BR%sT
1090#
1091# Mato Grosso do Sul (MS)
1092Zone America/Campo_Grande -3:38:28 - LMT 1914
1093 -4:00 Brazil AM%sT
1094#
1095# Mato Grosso (MT)
1096Zone America/Cuiaba -3:44:20 - LMT 1914
1097 -4:00 Brazil AM%sT 2003 Sep 24
1098 -4:00 - AMT 2004 Oct 1
1099 -4:00 Brazil AM%sT
1100#
1101# Rondonia (RO)
1102Zone America/Porto_Velho -4:15:36 - LMT 1914
1103 -4:00 Brazil AM%sT 1988 Sep 12
1104 -4:00 - AMT
1105#
1106# Roraima (RR)
1107Zone America/Boa_Vista -4:02:40 - LMT 1914
1108 -4:00 Brazil AM%sT 1988 Sep 12
1109 -4:00 - AMT 1999 Sep 30
1110 -4:00 Brazil AM%sT 2000 Oct 15
1111 -4:00 - AMT
1112#
1113# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
1114# The great circle line from Tabatinga to Porto Acre divides
1115# east from west Amazonas.
1116Zone America/Manaus -4:00:04 - LMT 1914
1117 -4:00 Brazil AM%sT 1988 Sep 12
1118 -4:00 - AMT 1993 Sep 28
1119 -4:00 Brazil AM%sT 1994 Sep 22
1120 -4:00 - AMT
1121#
1122# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1123# Eirunepe, Envira, Ipixuna
1124Zone America/Eirunepe -4:39:28 - LMT 1914
1125 -5:00 Brazil AC%sT 1988 Sep 12
1126 -5:00 - ACT 1993 Sep 28
1127 -5:00 Brazil AC%sT 1994 Sep 22
1128 -5:00 - ACT 2008 Jun 24 00:00
1129 -4:00 - AMT
1130#
1131# Acre (AC)
1132Zone America/Rio_Branco -4:31:12 - LMT 1914
1133 -5:00 Brazil AC%sT 1988 Sep 12
1134 -5:00 - ACT 2008 Jun 24 00:00
1135 -4:00 - AMT
1136
1137# Chile
1138
1139# From Eduardo Krell (1995-10-19):
1140# The law says to switch to DST at midnight [24:00] on the second SATURDAY
1141# of October.... The law is the same for March and October.
1142# (1998-09-29):
1143# Because of the drought this year, the government decided to go into
1144# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1145# (unless there's another dry season next year, I guess).
1146
1147# From Julio I. Pacheco Troncoso (1999-03-18):
1148# Because of the same drought, the government decided to end DST later,
1149# on April 3, (one-time change).
1150
1151# From Oscar van Vlijmen (2006-10-08):
1152# http://www.horaoficial.cl/cambio.htm
1153
1154# From Jesper Norgaard Welen (2006-10-08):
1155# I think that there are some obvious mistakes in the suggested link
1156# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1157# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1158# (they should have been 1990-09-15 and 1990-09-16 respectively), but
1159# anyhow it clears up some doubts too.
1160
1161# From Paul Eggert (2006-12-27):
1162# The following data for Chile and America/Santiago are from
1163# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1164# Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
1165# & Pottenger, except with DST transitions after 1932 cloned from
1166# America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1167# but we have no other source.
1168
1169# From German Poo-Caaman~o (2008-03-03):
1170# Due to drought, Chile extends Daylight Time in three weeks. This
1171# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1172# and Saturday 3/29 at 22:00 for Pacific/Easter)
1173# The Supreme Decree is located at
1174# <a href="http://www.shoa.cl/servicios/supremo316.pdf">
1175# http://www.shoa.cl/servicios/supremo316.pdf
1176# </a>
1177# and the instructions for 2008 are located in:
1178# <a href="http://www.horaoficial.cl/cambio.htm">
1179# http://www.horaoficial.cl/cambio.htm
1180# </a>.
1181
1182# From Jose Miguel Garrido (2008-03-05):
1183# ...
1184# You could see the announces of the change on
1185# <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
1186# http://www.shoa.cl/noticias/2008/04hora/hora.htm
1187# </a>.
1188
1189# From Angel Chiang (2010-03-04):
1190# Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1191# <a href="http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098">
1192# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1193# </a>
1194# (in Spanish, last paragraph).
1195#
1196# This is breaking news. There should be more information available later.
1197
1198# From Arthur Daivd Olson (2010-03-06):
1199# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1200
1201# From Glenn Eychaner (2011-03-02): [geychaner@mac.com]
1202# It appears that the Chilean government has decided to postpone the
1203# change from summer time to winter time again, by three weeks to April
1204# 2nd:
1205# <a href="http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651">
1206# http://www.emol.com/noticias/nacional/detalle/detallenoticias.asp?idnoticia=467651
1207# </a>
1208#
1209# This is not yet reflected in the offical "cambio de hora" site, but
1210# probably will be soon:
1211# <a href="http://www.horaoficial.cl/cambio.htm">
1212# http://www.horaoficial.cl/cambio.htm
1213# </a>
1214
1215# From Arthur David Olson (2011-03-02):
1216# The emol.com article mentions a water shortage as the cause of the
1217# postponement, which may mean that it's not a permanent change.
1218
1219# From Glenn Eychaner (2011-03-28):
1220# The article:
1221# <a href="http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}">
1222# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1223# </a>
1224#
1225# In English:
1226# Chile's clocks will go back an hour this year on the 7th of May instead
1227# of this Saturday. They will go forward again the 3rd Saturday in
1228# August, not in October as they have since 1968. This is a pilot plan
1229# which will be reevaluated in 2012.
1230
1231# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1232# As stated in the website of the Chilean Energy Ministry
1233# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1234# The Chilean Government has decided to postpone the entrance into winter time
1235# (to leave DST) from March 11 2012 to April 28th 2012. The decision has not
1236# been yet formalized but it will within the next days.
1237# Quote from the website communication:
1238#
1239# 6. For the year 2012, the dates of entry into winter time will be as follows:
1240# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1241# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1242# of the same day.
1243# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1244# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1245# 01:00 on September 2.
1246#
1247# Note that...this is yet another "temporary" change that will be reevaluated
1248# AGAIN in 2013.
1249
1250# NOTE: ChileAQ rules for Antarctic bases are stored separately in the
1251# 'antarctica' file.
1252
1253# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1254Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1255Rule Chile 1928 1932 - Apr 1 0:00 0 -
1256Rule Chile 1942 only - Jun 1 4:00u 0 -
1257Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1258Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1259Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1260Rule Chile 1947 only - Apr 1 4:00u 0 -
1261Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1262Rule Chile 1969 only - Mar 30 3:00u 0 -
1263Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1264Rule Chile 1970 only - Mar 29 3:00u 0 -
1265Rule Chile 1971 only - Mar 14 3:00u 0 -
1266Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1267Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1268Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1269Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1270Rule Chile 1987 only - Apr 12 3:00u 0 -
1271Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1272Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1273Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1274Rule Chile 1990 only - Mar 18 3:00u 0 -
1275Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1276Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1277Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1278Rule Chile 1997 only - Mar 30 3:00u 0 -
1279Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1280Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1281Rule Chile 1999 only - Apr 4 3:00u 0 -
1282Rule Chile 1999 2010 - Oct Sun>=9 4:00u 1:00 S
1283Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1284# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1285# which is used below in specifying the transition.
1286Rule Chile 2008 only - Mar 30 3:00u 0 -
1287Rule Chile 2009 only - Mar Sun>=9 3:00u 0 -
1288Rule Chile 2010 only - Apr Sun>=1 3:00u 0 -
1289Rule Chile 2011 only - May Sun>=2 3:00u 0 -
1290Rule Chile 2011 only - Aug Sun>=16 4:00u 1:00 S
1291Rule Chile 2012 only - Apr Sun>=23 3:00u 0 -
1292Rule Chile 2012 only - Sep Sun>=2 4:00u 1:00 S
1293Rule Chile 2013 max - Mar Sun>=9 3:00u 0 -
1294Rule Chile 2013 max - Oct Sun>=9 4:00u 1:00 S
1295# IATA SSIM anomalies: (1992-02) says 1992-03-14;
1296# (1996-09) says 1998-03-08. Ignore these.
1297# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1298Zone America/Santiago -4:42:46 - LMT 1890
1299 -4:42:46 - SMT 1910 # Santiago Mean Time
1300 -5:00 - CLT 1916 Jul 1 # Chile Time
1301 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1302 -4:00 - CLT 1919 Jul 1 # Chile Time
1303 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1304 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1305 -4:00 Chile CL%sT
1306Zone Pacific/Easter -7:17:44 - LMT 1890
1307 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1308 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1309 -6:00 Chile EAS%sT
1310#
1311# Sala y Gomez Island is like Pacific/Easter.
1312# Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1313# San Felix, and Antarctic bases, are like America/Santiago.
1314
1315# Colombia
1316# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1317Rule CO 1992 only - May 3 0:00 1:00 S
1318Rule CO 1993 only - Apr 4 0:00 0 -
1319# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1320Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
1321 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
1322 -5:00 CO CO%sT # Colombia Time
1323# Malpelo, Providencia, San Andres
1324# no information; probably like America/Bogota
1325
1326# Curacao
1327#
1328# From Paul Eggert (2006-03-22):
1329# Shanks & Pottenger say that The Bottom and Philipsburg have been at
1330# -4:00 since standard time was introduced on 1912-03-02; and that
1331# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1332# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1333# Saba Island has been like Curacao.
1334# This all predates our 1970 cutoff, though.
1335#
1336# By July 2007 Curacao and St Maarten are planned to become
1337# associated states within the Netherlands, much like Aruba;
1338# Bonaire, Saba and St Eustatius would become directly part of the
1339# Netherlands as Kingdom Islands. This won't affect their time zones
1340# though, as far as we know.
1341#
1342# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1343Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
1344 -4:30 - ANT 1965 # Netherlands Antilles Time
1345 -4:00 - AST
1346
1347# From Arthur David Olson (2011-06-15):
1348# At least for now, use links for places with new iso3166 codes.
1349# The name "Lower Prince's Quarter" is both longer than fourteen charaters
1350# and contains an apostrophe; use "Lower_Princes" below.
1351
1352Link America/Curacao America/Lower_Princes # Sint Maarten
1353Link America/Curacao America/Kralendijk # Bonaire, Sint Estatius and Saba
1354
1355# Ecuador
1356#
1357# From Paul Eggert (2007-03-04):
1358# Apparently Ecuador had a failed experiment with DST in 1992.
1359# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1360# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1361# talk about "hora Sixto". Leave this alone for now, as we have no data.
1362#
1363# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1364Zone America/Guayaquil -5:19:20 - LMT 1890
1365 -5:14:00 - QMT 1931 # Quito Mean Time
1366 -5:00 - ECT # Ecuador Time
1367Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1368 -5:00 - ECT 1986
1369 -6:00 - GALT # Galapagos Time
1370
1371# Falklands
1372
1373# From Paul Eggert (2006-03-22):
1374# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1375# the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1376
1377# From Falkland Islands Government Office, London (2001-01-22)
1378# via Jesper Norgaard:
1379# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1380# April 2001 and advance one hour to summer time at 2 am on Sunday 2
1381# September. It is anticipated that the clocks will revert back at 2
1382# am on Sunday 21 April 2002 and advance to summer time at 2 am on
1383# Sunday 1 September.
1384
1385# From Rives McDow (2001-02-13):
1386#
1387# I have communicated several times with people there, and the last
1388# time I had communications that was helpful was in 1998. Here is
1389# what was said then:
1390#
1391# "The general rule was that Stanley used daylight saving and the Camp
1392# did not. However for various reasons many people in the Camp have
1393# started to use daylight saving (known locally as 'Stanley Time')
1394# There is no rule as to who uses daylight saving - it is a matter of
1395# personal choice and so it is impossible to draw a map showing who
1396# uses it and who does not. Any list would be out of date as soon as
1397# it was produced. This year daylight saving ended on April 18/19th
1398# and started again on September 12/13th. I do not know what the rule
1399# is, but can find out if you like. We do not change at the same time
1400# as UK or Chile."
1401#
1402# I did have in my notes that the rule was "Second Saturday in Sep at
1403# 0:00 until third Saturday in Apr at 0:00". I think that this does
1404# not agree in some cases with Shanks; is this true?
1405#
1406# Also, there is no mention in the list that some areas in the
1407# Falklands do not use DST. I have found in my communications there
1408# that these areas are on the western half of East Falkland and all of
1409# West Falkland. Stanley is the only place that consistently observes
1410# DST. Again, as in other places in the world, the farmers don't like
1411# it. West Falkland is almost entirely sheep farmers.
1412#
1413# I know one lady there that keeps a list of which farm keeps DST and
1414# which doesn't each year. She runs a shop in Stanley, and says that
1415# the list changes each year. She uses it to communicate to her
1416# customers, catching them when they are home for lunch or dinner.
1417
1418# From Paul Eggert (2001-03-05):
1419# For now, we'll just record the time in Stanley, since we have no
1420# better info.
1421
1422# From Steffen Thorsen (2011-04-01):
1423# The Falkland Islands will not turn back clocks this winter, but stay on
1424# daylight saving time.
1425#
1426# One source:
1427# <a href="http://www.falklandnews.com/public/story.cfm?get=5914&source=3">
1428# http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1429# </a>
1430#
1431# We have gotten this confirmed by a clerk of the legislative assembly:
1432# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1433# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1434# hours) on the first Sunday of September at 0200hrs.
1435#
1436# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1437# will not revert to local mean time, but clocks will remain on Summer
1438# time (UTC/GMT - 3 hours) throughout the whole of 2011. Any long term
1439# change to local time following the trial period will be notified.
1440#
1441# From Andrew Newman (2012-02-24)
1442# A letter from Justin McPhee, Chief Executive,
1443# Cable & Wireless Falkland Islands (dated 2012-02-22)
1444# states...
1445# The current Atlantic/Stanley entry under South America expects the
1446# clocks to go back to standard Falklands Time (FKT) on the 15th April.
1447# The database entry states that in 2011 Stanley was staying on fixed
1448# summer time on a trial basis only. FIG need to contact IANA and/or
1449# the maintainers of the database to inform them we're adopting
1450# the same policy this year and suggest recommendations for future years.
1451#
1452# For now we will assume permanent summer time for the Falklands
1453# until advised differently (to apply for 2012 and beyond, after the 2011
1454# experiment was apparently successful.)
1455# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1456Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1457Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1458Rule Falk 1939 only - Oct 1 0:00 1:00 S
1459Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1460Rule Falk 1943 only - Jan 1 0:00 0 -
1461Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1462Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1463Rule Falk 1984 only - Sep 16 0:00 1:00 S
1464Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1465Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1466Rule Falk 2001 2010 - Apr Sun>=15 2:00 0 -
1467Rule Falk 2001 2010 - Sep Sun>=1 2:00 1:00 S
1468# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1469Zone Atlantic/Stanley -3:51:24 - LMT 1890
1470 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1471 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1472 -3:00 Falk FK%sT 1985 Sep 15
1473 -4:00 Falk FK%sT 2010 Sep 5 02:00
1474 -3:00 - FKST
1475
1476# French Guiana
1477# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1478Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1479 -4:00 - GFT 1967 Oct # French Guiana Time
1480 -3:00 - GFT
1481
1482# Guyana
1483# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1484Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1485 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1486 -3:45 - GYT 1975 Jul 31 # Guyana Time
1487 -3:00 - GYT 1991
1488# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1489 -4:00 - GYT
1490
1491# Paraguay
1492# From Paul Eggert (2006-03-22):
1493# Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1494# and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1495# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1496# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1497Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1498Rule Para 1975 1978 - Mar 1 0:00 0 -
1499Rule Para 1979 1991 - Apr 1 0:00 0 -
1500Rule Para 1989 only - Oct 22 0:00 1:00 S
1501Rule Para 1990 only - Oct 1 0:00 1:00 S
1502Rule Para 1991 only - Oct 6 0:00 1:00 S
1503Rule Para 1992 only - Mar 1 0:00 0 -
1504Rule Para 1992 only - Oct 5 0:00 1:00 S
1505Rule Para 1993 only - Mar 31 0:00 0 -
1506Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1507Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1508Rule Para 1996 only - Mar 1 0:00 0 -
1509# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1510# From Steffen Thorsen (2000-10-02):
1511# I have three independent reports that Paraguay changed to DST this Sunday
1512# (10-01).
1513#
1514# Translated by Gwillim Law (2001-02-27) from
1515# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1516# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1517# </a>:
1518# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1519# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1520# system has been operating for several years. Formerly there was a separate
1521# decree each year; the new law has the same effect, but permanently. Every
1522# year, the time will change on the first Sunday of October; likewise, the
1523# clock will be set back on the first Sunday of March.
1524#
1525Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1526# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1527Rule Para 1997 only - Feb lastSun 0:00 0 -
1528# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1529# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1530Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1531# From Rives McDow (2002-02-28):
1532# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1533# dst method to be from the first Sunday in September to the first Sunday in
1534# April.
1535Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1536Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1537#
1538# From Jesper Norgaard Welen (2005-01-02):
1539# There are several sources that claim that Paraguay made
1540# a timezone rule change in autumn 2004.
1541# From Steffen Thorsen (2005-01-05):
1542# Decree 1,867 (2004-03-05)
1543# From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1544# <http://www.presidencia.gov.py/decretos/D1867.pdf>
1545Rule Para 2004 2009 - Oct Sun>=15 0:00 1:00 S
1546Rule Para 2005 2009 - Mar Sun>=8 0:00 0 -
1547# From Carlos Raul Perasso (2010-02-18):
1548# By decree number 3958 issued yesterday (
1549# <a href="http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf">
1550# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1551# </a>
1552# )
1553# Paraguay changes its DST schedule, postponing the March rule to April and
1554# modifying the October date. The decree reads:
1555# ...
1556# Art. 1. It is hereby established that from the second Sunday of the month of
1557# April of this year (2010), the official time is to be set back 60 minutes,
1558# and that on the first Sunday of the month of October, it is to be set
1559# forward 60 minutes, in all the territory of the Paraguayan Republic.
1560# ...
1561Rule Para 2010 max - Oct Sun>=1 0:00 1:00 S
1562Rule Para 2010 max - Apr Sun>=8 0:00 0 -
1563
1564# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1565Zone America/Asuncion -3:50:40 - LMT 1890
1566 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1567 -4:00 - PYT 1972 Oct # Paraguay Time
1568 -3:00 - PYT 1974 Apr
1569 -4:00 Para PY%sT
1570
1571# Peru
1572#
1573# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1574# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1575# When we were in Peru in 1985-1986, they apparently switched over
1576# sometime between December 29 and January 3 while we were on the Amazon.
1577#
1578# From Paul Eggert (2006-03-22):
1579# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1580
1581# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1582Rule Peru 1938 only - Jan 1 0:00 1:00 S
1583Rule Peru 1938 only - Apr 1 0:00 0 -
1584Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1585Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1586Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1587Rule Peru 1986 1987 - Apr 1 0:00 0 -
1588Rule Peru 1990 only - Jan 1 0:00 1:00 S
1589Rule Peru 1990 only - Apr 1 0:00 0 -
1590# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1591Rule Peru 1994 only - Jan 1 0:00 1:00 S
1592Rule Peru 1994 only - Apr 1 0:00 0 -
1593# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1594Zone America/Lima -5:08:12 - LMT 1890
1595 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1596 -5:00 Peru PE%sT # Peru Time
1597
1598# South Georgia
1599# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1600Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1601 -2:00 - GST # South Georgia Time
1602
1603# South Sandwich Is
1604# uninhabited; scientific personnel have wintered
1605
1606# Suriname
1607# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1608Zone America/Paramaribo -3:40:40 - LMT 1911
1609 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1610 -3:40:36 - PMT 1945 Oct # The capital moved?
1611 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1612 -3:30 - SRT 1984 Oct # Suriname Time
1613 -3:00 - SRT
1614
1615# Trinidad and Tobago
1616# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1617Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1618 -4:00 - AST
1619
1620# Uruguay
1621# From Paul Eggert (1993-11-18):
1622# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1623# From Shanks & Pottenger:
1624# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1625# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1626Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1627Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1628Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1629Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1630# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1631Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1632Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1633Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1634# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1635Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1636# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1637# and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1638Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1639Rule Uruguay 1942 only - Jan 1 0:00 0 -
1640Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1641Rule Uruguay 1943 only - Mar 14 0:00 0 -
1642Rule Uruguay 1959 only - May 24 0:00 1:00 S
1643Rule Uruguay 1959 only - Nov 15 0:00 0 -
1644Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1645Rule Uruguay 1960 only - Mar 6 0:00 0 -
1646Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1647Rule Uruguay 1965 only - Sep 26 0:00 0 -
1648Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1649Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1650Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1651Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1652Rule Uruguay 1972 only - Aug 15 0:00 0 -
1653Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1654Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1655Rule Uruguay 1976 only - Oct 1 0:00 0 -
1656Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1657Rule Uruguay 1978 only - Apr 1 0:00 0 -
1658Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1659Rule Uruguay 1980 only - May 1 0:00 0 -
1660Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1661Rule Uruguay 1988 only - Mar 14 0:00 0 -
1662Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1663Rule Uruguay 1989 only - Mar 12 0:00 0 -
1664Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1665# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1666# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1667Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1668Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1669Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1670Rule Uruguay 1993 only - Feb 28 0:00 0 -
1671# From Eduardo Cota (2004-09-20):
1672# The uruguayan government has decreed a change in the local time....
1673# http://www.presidencia.gub.uy/decretos/2004091502.htm
1674Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1675# From Steffen Thorsen (2005-03-11):
1676# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1677# save energy ... it was postponed two weeks....
1678# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1679Rule Uruguay 2005 only - Mar 27 2:00 0 -
1680# From Eduardo Cota (2005-09-27):
1681# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1682# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1683# 02:00 local time, official time in Uruguay will be at GMT -2.
1684Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1685Rule Uruguay 2006 only - Mar 12 2:00 0 -
1686# From Jesper Norgaard Welen (2006-09-06):
1687# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1688Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1689Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1690# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1691Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1692 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1693 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1694 -3:00 Uruguay UY%sT
1695
1696# Venezuela
1697#
1698# From John Stainforth (2007-11-28):
1699# ... the change for Venezuela originally expected for 2007-12-31 has
1700# been brought forward to 2007-12-09. The official announcement was
1701# published today in the "Gaceta Oficial de la Republica Bolivariana
1702# de Venezuela, numero 38.819" (official document for all laws or
1703# resolution publication)
1704# http://www.globovision.com/news.php?nid=72208
1705
1706# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1707Zone America/Caracas -4:27:44 - LMT 1890
1708 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1709 -4:30 - VET 1965 # Venezuela Time
1710 -4:00 - VET 2007 Dec 9 03:00
1711 -4:30 - VET