xref: /illumos-gate/usr/src/data/zoneinfo/southamerica (revision 1f5207b7604fb44407eb4342aff613f7c4508508)
1# tzdb data for South America and environs
2
3# This file is in the public domain, so clarified as of
4# 2009-05-17 by Arthur David Olson.
5
6# This file is by no means authoritative; if you think you know better,
7# go ahead and edit the file (and please send any changes to
8# tz@iana.org for general use in the future).  For more, please see
9# the file CONTRIBUTING in the tz distribution.
10
11# From Paul Eggert (2016-12-05):
12#
13# Unless otherwise specified, the source for data through 1990 is:
14# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
15# San Diego: ACS Publications, Inc. (2003).
16# Unfortunately this book contains many errors and cites no sources.
17#
18# Many years ago Gwillim Law wrote that a good source
19# for time zone data was the International Air Transport
20# Association's Standard Schedules Information Manual (IATA SSIM),
21# published semiannually.  Law sent in several helpful summaries
22# of the IATA's data after 1990.  Except where otherwise noted,
23# IATA SSIM is the source for entries after 1990.
24#
25# For data circa 1899, a common source is:
26# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
27# https://www.jstor.org/stable/1774359
28#
29# These tables use numeric abbreviations like -03 and -0330 for
30# integer hour and minute UT offsets.  Although earlier editions used
31# alphabetic time zone abbreviations, these abbreviations were
32# invented and did not reflect common practice.
33
34###############################################################################
35
36###############################################################################
37
38# Argentina
39
40# From Bob Devine (1988-01-28):
41# Argentina: first Sunday in October to first Sunday in April since 1976.
42# Double Summer time from 1969 to 1974.  Switches at midnight.
43
44# From U. S. Naval Observatory (1988-01-19):
45# ARGENTINA           3 H BEHIND   UTC
46
47# From Hernan G. Otero (1995-06-26):
48# I am sending modifications to the Argentine time zone table...
49# AR was chosen because they are the ISO letters that represent Argentina.
50
51# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
52Rule	Arg	1930	only	-	Dec	 1	0:00	1:00	-
53Rule	Arg	1931	only	-	Apr	 1	0:00	0	-
54Rule	Arg	1931	only	-	Oct	15	0:00	1:00	-
55Rule	Arg	1932	1940	-	Mar	 1	0:00	0	-
56Rule	Arg	1932	1939	-	Nov	 1	0:00	1:00	-
57Rule	Arg	1940	only	-	Jul	 1	0:00	1:00	-
58Rule	Arg	1941	only	-	Jun	15	0:00	0	-
59Rule	Arg	1941	only	-	Oct	15	0:00	1:00	-
60Rule	Arg	1943	only	-	Aug	 1	0:00	0	-
61Rule	Arg	1943	only	-	Oct	15	0:00	1:00	-
62Rule	Arg	1946	only	-	Mar	 1	0:00	0	-
63Rule	Arg	1946	only	-	Oct	 1	0:00	1:00	-
64Rule	Arg	1963	only	-	Oct	 1	0:00	0	-
65Rule	Arg	1963	only	-	Dec	15	0:00	1:00	-
66Rule	Arg	1964	1966	-	Mar	 1	0:00	0	-
67Rule	Arg	1964	1966	-	Oct	15	0:00	1:00	-
68Rule	Arg	1967	only	-	Apr	 2	0:00	0	-
69Rule	Arg	1967	1968	-	Oct	Sun>=1	0:00	1:00	-
70Rule	Arg	1968	1969	-	Apr	Sun>=1	0:00	0	-
71Rule	Arg	1974	only	-	Jan	23	0:00	1:00	-
72Rule	Arg	1974	only	-	May	 1	0:00	0	-
73Rule	Arg	1988	only	-	Dec	 1	0:00	1:00	-
74#
75# From Hernan G. Otero (1995-06-26):
76# These corrections were contributed by InterSoft Argentina S.A.,
77# obtaining the data from the:
78# Talleres de Hidrografía Naval Argentina
79# (Argentine Naval Hydrography Institute)
80Rule	Arg	1989	1993	-	Mar	Sun>=1	0:00	0	-
81Rule	Arg	1989	1992	-	Oct	Sun>=15	0:00	1:00	-
82#
83# From Hernan G. Otero (1995-06-26):
84# From this moment on, the law that mandated the daylight saving
85# time corrections was derogated and no more modifications
86# to the time zones (for daylight saving) are now made.
87#
88# From Rives McDow (2000-01-10):
89# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
90# which did not result in the switch of a time zone, as they stayed 9 hours
91# from the International Date Line.
92Rule	Arg	1999	only	-	Oct	Sun>=1	0:00	1:00	-
93# From Paul Eggert (2007-12-28):
94# DST was set to expire on March 5, not March 3, but since it was converted
95# to standard time on March 3 it's more convenient for us to pretend that
96# it ended on March 3.
97Rule	Arg	2000	only	-	Mar	3	0:00	0	-
98#
99# From Peter Gradelski via Steffen Thorsen (2000-03-01):
100# We just checked with our São Paulo office and they say the government of
101# Argentina decided not to become one of the countries that go on or off DST.
102# So Buenos Aires should be -3 hours from GMT at all times.
103#
104# From Fabián L. Arce Jofré (2000-04-04):
105# The law that claimed DST for Argentina was derogated by President Fernando
106# de la Rúa on March 2, 2000, because it would make people spend more energy
107# in the winter time, rather than less.  The change took effect on March 3.
108#
109# From Mariano Absatz (2001-06-06):
110# one of the major newspapers here in Argentina said that the 1999
111# Timezone Law (which never was effectively applied) will (would?) be
112# in effect.... The article is at
113# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
114# ... The Law itself is "Ley No. 25155", sanctioned on 1999-08-25, enacted
115# 1999-09-17, and published 1999-09-21.  The official publication is at:
116# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
117# Regretfully, you have to subscribe (and pay) for the on-line version....
118#
119# (2001-06-12):
120# the timezone for Argentina will not change next Sunday.
121# Apparently it will do so on Sunday 24th....
122# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
123#
124# (2001-06-25):
125# Last Friday (yes, the last working day before the date of the change), the
126# Senate annulled the 1999 law that introduced the changes later postponed.
127# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
128# It remains the vote of the Deputies..., but it will be the same....
129# This kind of things had always been done this way in Argentina.
130# We are still -03:00 all year round in all of the country.
131#
132# From Steffen Thorsen (2007-12-21):
133# A user (Leonardo Chaim) reported that Argentina will adopt DST....
134# all of the country (all Zone-entries) are affected.  News reports like
135# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
136# that Argentina will use DST next year as well, from October to
137# March, although exact rules are not given.
138#
139# From Jesper Nørgaard Welen (2007-12-26)
140# The last hurdle of Argentina DST is over, the proposal was approved in
141# the lower chamber too (Diputados) with a vote 192 for and 2 against.
142# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
143# the original scanned proposal, where the dates and the zero hours are
144# clear and unambiguous...This is the article about final approval:
145# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
146#
147# From Paul Eggert (2007-12-22):
148# For dates after mid-2008, the following rules are my guesses and
149# are quite possibly wrong, but are more likely than no DST at all.
150
151# From Alexander Krivenyshev (2008-09-05):
152# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
153# Argentina will start DST on Sunday October 19, 2008.
154#
155# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
156# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
157
158# From Juan Manuel Docile in https://bugs.gentoo.org/240339 (2008-10-07)
159# via Rodrigo Severo:
160# Argentinian law No. 25.155 is no longer valid.
161# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
162# The new one is law No. 26.350
163# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
164# So there is no summer time in Argentina for now.
165
166# From Mariano Absatz (2008-10-20):
167# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST
168# in Argentina from 2008-10-19 until 2009-03-15.
169# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
170#
171
172# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer
173# 2008/2009: Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La
174# Pampa, Neuquén, Rio Negro, Chubut, Santa Cruz and Tierra del Fuego
175# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
176#
177# Press release 235 dated Saturday October 18th, from the Government of the
178# Province of Jujuy saying it will not apply DST either (even when it was not
179# included in Decree 1705/2008).
180# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
181
182# From fullinet (2009-10-18):
183# As announced in
184# http://www.argentina.gob.ar/argentina/portal/paginas.dhtml?pagina=356
185# (an official .gob.ar) under title: "Sin Cambio de Hora"
186# (English: "No hour change").
187#
188# "Por el momento, el Gobierno Nacional resolvió no modificar la hora
189# oficial, decisión que estaba en estudio para su implementación el
190# domingo 18 de octubre. Desde el Ministerio de Planificación se anunció
191# que la Argentina hoy, en estas condiciones meteorológicas, no necesita
192# la modificación del huso horario, ya que 2009 nos encuentra con
193# crecimiento en la producción y distribución energética."
194
195Rule	Arg	2007	only	-	Dec	30	0:00	1:00	-
196Rule	Arg	2008	2009	-	Mar	Sun>=15	0:00	0	-
197Rule	Arg	2008	only	-	Oct	Sun>=15	0:00	1:00	-
198
199# From Mariano Absatz (2004-05-21):
200# Today it was officially published that the Province of Mendoza is changing
201# its timezone this winter... starting tomorrow night....
202# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
203# From Paul Eggert (2004-05-24):
204# It's Law No. 7,210.  This change is due to a public power emergency, so for
205# now we'll assume it's for this year only.
206#
207# From Paul Eggert (2018-01-31):
208# Hora de verano para la República Argentina
209# http://buenasiembra.com.ar/esoterismo/astrologia/hora-de-verano-de-la-republica-argentina-27.html
210# says that standard time in Argentina from 1894-10-31
211# to 1920-05-01 was -4:16:48.25.  Go with this more-precise value
212# over Shanks & Pottenger.  It is upward compatible with Milne, who
213# says Córdoba time was -4:16:48.2.
214
215#
216# From Mariano Absatz (2004-06-05):
217# These media articles from a major newspaper mostly cover the current state:
218# http://www.lanacion.com.ar/04/05/27/de_604825.asp
219# http://www.lanacion.com.ar/04/05/28/de_605203.asp
220#
221# The following eight (8) provinces pulled clocks back to UTC-04:00 at
222# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
223# Apparently, all nine provinces would go back to UTC-03:00 at the same
224# time in October 17th.
225#
226# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
227# Tierra del Fuego, Tucumán.
228#
229# From Mariano Absatz (2004-06-14):
230# ... this weekend, the Province of Tucumán decided it'd go back to UTC-03:00
231# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
232# annoyance with the change is much higher than the power savings obtained....
233#
234# From Gwillim Law (2004-06-14):
235# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
236#     "The time change in Tierra del Fuego was a conflicted decision from
237#   the start.  The government had decreed that the measure would take
238#   effect on June 1, but a normative error forced the new time to begin
239#   three days earlier, from a Saturday to a Sunday....
240# Our understanding was that the change was originally scheduled to take place
241# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
242# provinces).  Sunday was May 30, only two days earlier.  So the article
243# contains a contradiction.  I would give more credence to the Saturday/Sunday
244# date than the "three days earlier" phrase, and conclude that Tierra del
245# Fuego set its clocks back at 2004-05-30 00:00.
246#
247# From Steffen Thorsen (2004-10-05):
248# The previous law 7210 which changed the province of Mendoza's time zone
249# back in May have been modified slightly in a new law 7277, which set the
250# new end date to 2004-09-26 (original date was 2004-10-17).
251# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
252#
253# From Mariano Absatz (2004-10-05):
254# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
255# Sunday, May 30th and Monday, May 31st.  It changed back to UTC-03:00
256# at midnight between Saturday, July 24th and Sunday, July 25th....
257# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
258# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
259# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
260
261# From Alex Krivenyshev (2008-01-17):
262# Here are articles that Argentina Province San Luis is planning to end DST
263# as earlier as upcoming Monday January 21, 2008 or February 2008:
264#
265# Provincia argentina retrasa reloj y marca diferencia con resto del país
266# (Argentine Province delayed clock and mark difference with the rest of the
267# country)
268# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
269#
270# Es inminente que en San Luis atrasen una hora los relojes
271# (It is imminent in San Luis clocks one hour delay)
272# https://www.lagaceta.com.ar/nota/253414/Economia/Es-inminente-que-en-San-Luis-atrasen-una-hora-los-relojes.html
273# http://www.worldtimezone.com/dst_news/dst_news_argentina02.html
274
275# From Jesper Nørgaard Welen (2008-01-18):
276# The page of the San Luis provincial government
277# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
278# confirms what Alex Krivenyshev has earlier sent to the tz
279# emailing list about that San Luis plans to return to standard
280# time much earlier than the rest of the country. It also
281# confirms that upon request the provinces San Juan and Mendoza
282# refused to follow San Luis in this change.
283#
284# The change is supposed to take place Monday the 21st at 0:00
285# hours. As far as I understand it if this goes ahead, we need
286# a new timezone for San Luis (although there are also documented
287# independent changes in the southamerica file of San Luis in
288# 1990 and 1991 which has not been confirmed).
289
290# From Jesper Nørgaard Welen (2008-01-25):
291# Unfortunately the below page has become defunct, about the San Luis
292# time change. Perhaps because it now is part of a group of pages "Most
293# important pages of 2008."
294#
295# You can use
296# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
297# instead it seems. Or use "Buscador" from the main page of the San Luis
298# government, and fill in "huso" and click OK, and you will get 3 pages
299# from which the first one is identical to the above.
300
301# From Mariano Absatz (2008-01-28):
302# I can confirm that the Province of San Luis (and so far only that
303# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
304# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
305# 1 hour), and they intend to keep UTC-3 as their timezone all year round
306# (that is, unless they change their mind any minute now).
307#
308# So we'll have to add yet another city to 'southamerica' (I think San
309# Luis city is the mos populated city in the Province, so it'd be
310# America/Argentina/San_Luis... of course I can't remember if San Luis's
311# history of particular changes goes along with Mendoza or San Juan :-(
312# (I only remember not being able to collect hard facts about San Luis
313# back in 2004, when these provinces changed to UTC-4 for a few days, I
314# mailed them personally and never got an answer).
315
316# From Paul Eggert (2014-08-12):
317# Unless otherwise specified, data entries are from Shanks & Pottenger through
318# 1992, from the IATA otherwise.  As noted below, Shanks & Pottenger say that
319# America/Cordoba split into 6 subregions during 1991/1992, one of which
320# was America/San_Luis, but we haven't verified this yet so for now we'll
321# keep America/Cordoba a single region rather than splitting it into the
322# other 5 subregions.
323
324# From Mariano Absatz (2009-03-13):
325# Yesterday (with our usual 2-day notice) the Province of San Luis
326# decided that next Sunday instead of "staying" @utc-03:00 they will go
327# to utc-04:00 until the second Saturday in October...
328#
329# The press release is at
330# http://www.sanluis.gov.ar/SL/Paginas/NoticiaDetalle.asp?TemaId=1&InfoPrensaId=3102
331# (I couldn't find the decree, but www.sanluis.gov.ar
332# is the official page for the Province Government.)
333#
334# There's also a note in only one of the major national papers ...
335# http://www.lanacion.com.ar/nota.asp?nota_id=1107912
336#
337# The press release says [quick and dirty translation]:
338# ... announced that next Sunday, at 00:00, Puntanos (the San Luis
339# inhabitants) will have to turn back one hour their clocks
340#
341# Since then, San Luis will establish its own Province timezone. Thus,
342# during 2009, this timezone change will run from 00:00 the third Sunday
343# in March until 24:00 of the second Saturday in October.
344
345# From Mariano Absatz (2009-10-16):
346# ...the Province of San Luis is a case in itself.
347#
348# The Law at
349# http://www.diputadossanluis.gov.ar/diputadosasp/paginas/verNorma.asp?NormaID=276
350# is ambiguous because establishes a calendar from the 2nd Sunday in
351# October at 0:00 thru the 2nd Saturday in March at 24:00 and the
352# complement of that starting on the 2nd Sunday of March at 0:00 and
353# ending on the 2nd Saturday of March at 24:00.
354#
355# This clearly breaks every time the 1st of March or October is a Sunday.
356#
357# IMHO, the "spirit of the Law" is to make the changes at 0:00 on the 2nd
358# Sunday of October and March.
359#
360# The problem is that the changes in the rest of the Provinces that did
361# change in 2007/2008, were made according to the Federal Law and Decrees
362# that did so on the 3rd Sunday of October and March.
363#
364# In fact, San Luis actually switched from UTC-4 to UTC-3 last Sunday
365# (October 11th) at 0:00.
366#
367# So I guess a new set of rules, besides "Arg", must be made and the last
368# America/Argentina/San_Luis entries should change to use these...
369# ...
370
371# From Alexander Krivenyshev (2010-04-09):
372# According to news reports from El Diario de la República Province San
373# Luis, Argentina (standard time UTC-04) will keep Daylight Saving Time
374# after April 11, 2010 - will continue to have same time as rest of
375# Argentina (UTC-3) (no DST).
376#
377# Confirmaron la prórroga del huso horario de verano (Spanish)
378# http://www.eldiariodelarepublica.com/index.php?option=com_content&task=view&id=29383&Itemid=9
379# or (some English translation):
380# http://www.worldtimezone.com/dst_news/dst_news_argentina08.html
381
382# From Mariano Absatz (2010-04-12):
383# yes...I can confirm this...and given that San Luis keeps calling
384# UTC-03:00 "summer time", we should't just let San Luis go back to "Arg"
385# rules...San Luis is still using "Western ARgentina Time" and it got
386# stuck on Summer daylight savings time even though the summer is over.
387
388# From Paul Eggert (2018-01-23):
389# Perhaps San Luis operates on the legal fiction that it is at -04
390# with perpetual daylight saving time, but ordinary usage typically seems to
391# just say it's at -03; see, for example,
392# https://es.wikipedia.org/wiki/Hora_oficial_argentina
393# We've documented similar situations as being plain changes to
394# standard time, so let's do that here too.  This does not change UTC
395# offsets, only tm_isdst and the time zone abbreviations.  One minor
396# plus is that this silences a zic complaint that there's no POSIX TZ
397# setting for timestamps past 2038.
398
399# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
400#
401# Buenos Aires (BA), Capital Federal (CF),
402Zone America/Argentina/Buenos_Aires -3:53:48 - LMT	1894 Oct 31
403			-4:16:48 -	CMT	1920 May    # Córdoba Mean Time
404			-4:00	-	-04	1930 Dec
405			-4:00	Arg	-04/-03	1969 Oct  5
406			-3:00	Arg	-03/-02	1999 Oct  3
407			-4:00	Arg	-04/-03	2000 Mar  3
408			-3:00	Arg	-03/-02
409#
410# Córdoba (CB), Santa Fe (SF), Entre Ríos (ER), Corrientes (CN), Misiones (MN),
411# Chaco (CC), Formosa (FM), Santiago del Estero (SE)
412#
413# Shanks & Pottenger also make the following claims, which we haven't verified:
414# - Formosa switched to -3:00 on 1991-01-07.
415# - Misiones switched to -3:00 on 1990-12-29.
416# - Chaco switched to -3:00 on 1991-01-04.
417# - Santiago del Estero switched to -4:00 on 1991-04-01,
418#   then to -3:00 on 1991-04-26.
419#
420Zone America/Argentina/Cordoba -4:16:48 - LMT	1894 Oct 31
421			-4:16:48 -	CMT	1920 May
422			-4:00	-	-04	1930 Dec
423			-4:00	Arg	-04/-03	1969 Oct  5
424			-3:00	Arg	-03/-02	1991 Mar  3
425			-4:00	-	-04	1991 Oct 20
426			-3:00	Arg	-03/-02	1999 Oct  3
427			-4:00	Arg	-04/-03	2000 Mar  3
428			-3:00	Arg	-03/-02
429#
430# Salta (SA), La Pampa (LP), Neuquén (NQ), Rio Negro (RN)
431Zone America/Argentina/Salta -4:21:40 - LMT	1894 Oct 31
432			-4:16:48 -	CMT	1920 May
433			-4:00	-	-04	1930 Dec
434			-4:00	Arg	-04/-03	1969 Oct  5
435			-3:00	Arg	-03/-02	1991 Mar  3
436			-4:00	-	-04	1991 Oct 20
437			-3:00	Arg	-03/-02	1999 Oct  3
438			-4:00	Arg	-04/-03	2000 Mar  3
439			-3:00	Arg	-03/-02	2008 Oct 18
440			-3:00	-	-03
441#
442# Tucumán (TM)
443Zone America/Argentina/Tucuman -4:20:52 - LMT	1894 Oct 31
444			-4:16:48 -	CMT	1920 May
445			-4:00	-	-04	1930 Dec
446			-4:00	Arg	-04/-03	1969 Oct  5
447			-3:00	Arg	-03/-02	1991 Mar  3
448			-4:00	-	-04	1991 Oct 20
449			-3:00	Arg	-03/-02	1999 Oct  3
450			-4:00	Arg	-04/-03	2000 Mar  3
451			-3:00	-	-03	2004 Jun  1
452			-4:00	-	-04	2004 Jun 13
453			-3:00	Arg	-03/-02
454#
455# La Rioja (LR)
456Zone America/Argentina/La_Rioja -4:27:24 - LMT	1894 Oct 31
457			-4:16:48 -	CMT	1920 May
458			-4:00	-	-04	1930 Dec
459			-4:00	Arg	-04/-03	1969 Oct  5
460			-3:00	Arg	-03/-02	1991 Mar  1
461			-4:00	-	-04	1991 May  7
462			-3:00	Arg	-03/-02	1999 Oct  3
463			-4:00	Arg	-04/-03	2000 Mar  3
464			-3:00	-	-03	2004 Jun  1
465			-4:00	-	-04	2004 Jun 20
466			-3:00	Arg	-03/-02	2008 Oct 18
467			-3:00	-	-03
468#
469# San Juan (SJ)
470Zone America/Argentina/San_Juan -4:34:04 - LMT	1894 Oct 31
471			-4:16:48 -	CMT	1920 May
472			-4:00	-	-04	1930 Dec
473			-4:00	Arg	-04/-03	1969 Oct  5
474			-3:00	Arg	-03/-02	1991 Mar  1
475			-4:00	-	-04	1991 May  7
476			-3:00	Arg	-03/-02	1999 Oct  3
477			-4:00	Arg	-04/-03	2000 Mar  3
478			-3:00	-	-03	2004 May 31
479			-4:00	-	-04	2004 Jul 25
480			-3:00	Arg	-03/-02	2008 Oct 18
481			-3:00	-	-03
482#
483# Jujuy (JY)
484Zone America/Argentina/Jujuy -4:21:12 -	LMT	1894 Oct 31
485			-4:16:48 -	CMT	1920 May
486			-4:00	-	-04	1930 Dec
487			-4:00	Arg	-04/-03	1969 Oct  5
488			-3:00	Arg	-03/-02	1990 Mar  4
489			-4:00	-	-04	1990 Oct 28
490			-4:00	1:00	-03	1991 Mar 17
491			-4:00	-	-04	1991 Oct  6
492			-3:00	1:00	-02	1992
493			-3:00	Arg	-03/-02	1999 Oct  3
494			-4:00	Arg	-04/-03	2000 Mar  3
495			-3:00	Arg	-03/-02	2008 Oct 18
496			-3:00	-	-03
497#
498# Catamarca (CT), Chubut (CH)
499Zone America/Argentina/Catamarca -4:23:08 - LMT	1894 Oct 31
500			-4:16:48 -	CMT	1920 May
501			-4:00	-	-04	1930 Dec
502			-4:00	Arg	-04/-03	1969 Oct  5
503			-3:00	Arg	-03/-02	1991 Mar  3
504			-4:00	-	-04	1991 Oct 20
505			-3:00	Arg	-03/-02	1999 Oct  3
506			-4:00	Arg	-04/-03	2000 Mar  3
507			-3:00	-	-03	2004 Jun  1
508			-4:00	-	-04	2004 Jun 20
509			-3:00	Arg	-03/-02	2008 Oct 18
510			-3:00	-	-03
511#
512# Mendoza (MZ)
513Zone America/Argentina/Mendoza -4:35:16 - LMT	1894 Oct 31
514			-4:16:48 -	CMT	1920 May
515			-4:00	-	-04	1930 Dec
516			-4:00	Arg	-04/-03	1969 Oct  5
517			-3:00	Arg	-03/-02	1990 Mar  4
518			-4:00	-	-04	1990 Oct 15
519			-4:00	1:00	-03	1991 Mar  1
520			-4:00	-	-04	1991 Oct 15
521			-4:00	1:00	-03	1992 Mar  1
522			-4:00	-	-04	1992 Oct 18
523			-3:00	Arg	-03/-02	1999 Oct  3
524			-4:00	Arg	-04/-03	2000 Mar  3
525			-3:00	-	-03	2004 May 23
526			-4:00	-	-04	2004 Sep 26
527			-3:00	Arg	-03/-02	2008 Oct 18
528			-3:00	-	-03
529#
530# San Luis (SL)
531
532Rule	SanLuis	2008	2009	-	Mar	Sun>=8	0:00	0	-
533Rule	SanLuis	2007	2008	-	Oct	Sun>=8	0:00	1:00	-
534
535Zone America/Argentina/San_Luis -4:25:24 - LMT	1894 Oct 31
536			-4:16:48 -	CMT	1920 May
537			-4:00	-	-04	1930 Dec
538			-4:00	Arg	-04/-03	1969 Oct  5
539			-3:00	Arg	-03/-02	1990
540			-3:00	1:00	-02	1990 Mar 14
541			-4:00	-	-04	1990 Oct 15
542			-4:00	1:00	-03	1991 Mar  1
543			-4:00	-	-04	1991 Jun  1
544			-3:00	-	-03	1999 Oct  3
545			-4:00	1:00	-03	2000 Mar  3
546			-3:00	-	-03	2004 May 31
547			-4:00	-	-04	2004 Jul 25
548			-3:00	Arg	-03/-02	2008 Jan 21
549			-4:00	SanLuis	-04/-03	2009 Oct 11
550			-3:00	-	-03
551#
552# Santa Cruz (SC)
553Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT	1894 Oct 31
554			-4:16:48 -	CMT	1920 May
555			-4:00	-	-04	1930 Dec
556			-4:00	Arg	-04/-03	1969 Oct  5
557			-3:00	Arg	-03/-02	1999 Oct  3
558			-4:00	Arg	-04/-03	2000 Mar  3
559			-3:00	-	-03	2004 Jun  1
560			-4:00	-	-04	2004 Jun 20
561			-3:00	Arg	-03/-02	2008 Oct 18
562			-3:00	-	-03
563#
564# Tierra del Fuego, Antártida e Islas del Atlántico Sur (TF)
565Zone America/Argentina/Ushuaia -4:33:12 - LMT	1894 Oct 31
566			-4:16:48 -	CMT	1920 May
567			-4:00	-	-04	1930 Dec
568			-4:00	Arg	-04/-03	1969 Oct  5
569			-3:00	Arg	-03/-02	1999 Oct  3
570			-4:00	Arg	-04/-03	2000 Mar  3
571			-3:00	-	-03	2004 May 30
572			-4:00	-	-04	2004 Jun 20
573			-3:00	Arg	-03/-02	2008 Oct 18
574			-3:00	-	-03
575
576# Aruba
577Link America/Curacao America/Aruba
578
579# Bolivia
580# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
581Zone	America/La_Paz	-4:32:36 -	LMT	1890
582			-4:32:36 -	CMT	1931 Oct 15 # Calamarca MT
583			-4:32:36 1:00	BST	1932 Mar 21 # Bolivia ST
584			-4:00	-	-04
585
586# Brazil
587
588# From Paul Eggert (1993-11-18):
589# The mayor of Rio recently attempted to change the time zone rules
590# just in his city, in order to leave more summer time for the tourist trade.
591# The rule change lasted only part of the day;
592# the federal government refused to follow the city's rules, and business
593# was in a chaos, so the mayor backed down that afternoon.
594
595# From IATA SSIM (1996-02):
596# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
597# Santa Catarina (SC), Paraná (PR), São Paulo (SP), Rio de Janeiro (RJ),
598# Espírito Santo (ES), Minas Gerais (MG), Bahia (BA), Goiás (GO),
599# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
600# [The last three states are new to this issue of the IATA SSIM.]
601
602# From Gwillim Law (1996-10-07):
603# Geography, history (Tocantins was part of Goiás until 1989), and other
604# sources of time zone information lead me to believe that AL, SE, and TO were
605# always in BR1, and so the only change was whether or not they observed DST....
606# The earliest issue of the SSIM I have is 2/91.  Each issue from then until
607# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
608# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
609# (UTC-4)....  The other two time zones given for Brazil are BR3, which is
610# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
611# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
612# become part of the state of Pernambuco).  The boundary between BR1 and BR2
613# has never been clearly stated.  They've simply been called East and West.
614# However, some conclusions can be drawn from another IATA manual: the Airline
615# Coding Directory, which lists close to 400 airports in Brazil.  For each
616# airport it gives a time zone which is coded to the SSIM.  From that
617# information, I'm led to conclude that the states of Amapá (AP), Ceará (CE),
618# Maranhão (MA), Paraíba (PR), Pernambuco (PE), Piauí (PI), and Rio Grande do
619# Norte (RN), and the eastern part of Pará (PA) are all in BR1 without DST.
620
621# From Marcos Tadeu (1998-09-27):
622# Brazilian official page <http://pcdsh01.on.br/verao1.html>
623
624# From Jesper Nørgaard (2000-11-03):
625# [For an official list of which regions in Brazil use which time zones, see:]
626# http://pcdsh01.on.br/Fusbr.htm
627# http://pcdsh01.on.br/Fusbrhv.htm
628
629# From Celso Doria via David Madeo (2002-10-09):
630# The reason for the delay this year has to do with elections in Brazil.
631#
632# Unlike in the United States, elections in Brazil are 100% computerized and
633# the results are known almost immediately.  Yesterday, it was the first
634# round of the elections when 115 million Brazilians voted for President,
635# Governor, Senators, Federal Deputies, and State Deputies.  Nobody is
636# counting (or re-counting) votes anymore and we know there will be a second
637# round for the Presidency and also for some Governors.  The 2nd round will
638# take place on October 27th.
639#
640# The reason why the DST will only begin November 3rd is that the thousands
641# of electoral machines used cannot have their time changed, and since the
642# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
643# the Government decided to postpone DST, instead of changing the Constitution
644# (maybe, for the next elections, it will be possible to change the clock)...
645
646# From Rodrigo Severo (2004-10-04):
647# It's just the biannual change made necessary by the much hyped, supposedly
648# modern Brazilian eletronic voting machines which, apparently, can't deal
649# with a time change between the first and the second rounds of the elections.
650
651# From Steffen Thorsen (2007-09-20):
652# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
653# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
654
655# From Paul Schulze (2008-06-24):
656# ...by law number 11.662 of April 24, 2008 (published in the "Diario
657# Oficial da União"...) in Brazil there are changes in the timezones,
658# effective today (00:00am at June 24, 2008) as follows:
659#
660# a) The timezone UTC+5 is extinguished, with all the Acre state and the
661# part of the Amazonas state that had this timezone now being put to the
662# timezone UTC+4
663# b) The whole Pará state now is put at timezone UTC+3, instead of just
664# part of it, as was before.
665#
666# This change follows a proposal of senator Tiao Viana of Acre state, that
667# proposed it due to concerns about open television channels displaying
668# programs inappropriate to youths in the states that had the timezone
669# UTC+5 too early in the night. In the occasion, some more corrections
670# were proposed, trying to unify the timezones of any given state. This
671# change modifies timezone rules defined in decree 2.784 of 18 June,
672# 1913.
673
674# From Rodrigo Severo (2008-06-24):
675# Just correcting the URL:
676# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=do&secao=1&pagina=1&data=25/04/2008
677#
678# As a result of the above Decree I believe the America/Rio_Branco
679# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
680# be created to represent the...west side of the Pará State. I
681# suggest this new timezone be called Santarem as the most
682# important/populated city in the affected area.
683#
684# This new timezone would be the same as the Rio_Branco timezone up to
685# the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
686
687# From Alex Krivenyshev (2008-06-24):
688# This is a quick reference page for New and Old Brazil Time Zones map.
689# http://www.worldtimezone.com/brazil-time-new-old.php
690#
691# - 4 time zones replaced by 3 time zones - eliminating time zone UTC-05
692# (state Acre and the part of the Amazonas will be UTC/GMT-04) - western
693# part of Par state is moving to one timezone UTC-03 (from UTC-04).
694
695# From Paul Eggert (2002-10-10):
696# The official decrees referenced below are mostly taken from
697# Decretos sobre o Horário de Verão no Brasil.
698# http://pcdsh01.on.br/DecHV.html
699
700# From Steffen Thorsen (2008-08-29):
701# As announced by the government and many newspapers in Brazil late
702# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
703# it will end on 2009-02-15 (current rule for Brazil is fine). Based on
704# past years experience with the elections, there was a good chance that
705# the start was postponed to November, but it did not happen this year.
706#
707# It has not yet been posted to http://pcdsh01.on.br/DecHV.html
708#
709# An official page about it:
710# http://www.mme.gov.br/site/news/detail.do?newsId=16722
711# Note that this link does not always work directly, but must be accessed
712# by going to
713# http://www.mme.gov.br/first
714#
715# One example link that works directly:
716# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
717# (Portuguese)
718#
719# We have a written a short article about it as well:
720# https://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
721#
722# From Alexander Krivenyshev (2011-10-04):
723# State Bahia will return to Daylight savings time this year after 8 years off.
724# The announcement was made by Governor Jaques Wagner in an interview to a
725# television station in Salvador.
726
727# In Portuguese:
728# http://g1.globo.com/bahia/noticia/2011/10/governador-jaques-wagner-confirma-horario-de-verao-na-bahia.html
729# https://noticias.terra.com.br/brasil/noticias/0,,OI5390887-EI8139,00-Bahia+volta+a+ter+horario+de+verao+apos+oito+anos.html
730
731# From Guilherme Bernardes Rodrigues (2011-10-07):
732# There is news in the media, however there is still no decree about it.
733# I just send a e-mail to Zulmira Brandao at http://pcdsh01.on.br/ the
734# official agency about time in Brazil, and she confirmed that the old rule is
735# still in force.
736
737# From Guilherme Bernardes Rodrigues (2011-10-14)
738# It's official, the President signed a decree that includes Bahia in summer
739# time.
740#	 [ and in a second message (same day): ]
741# I found the decree.
742#
743# DECRETO No. 7.584, DE 13 DE OUTUBRO DE 2011
744# Link :
745# http://www.in.gov.br/visualiza/index.jsp?data=13/10/2011&jornal=1000&pagina=6&totalArquivos=6
746
747# From Kelley Cook (2012-10-16):
748# The governor of state of Bahia in Brazil announced on Thursday that
749# due to public pressure, he is reversing the DST policy they implemented
750# last year and will not be going to Summer Time on October 21st....
751# http://www.correio24horas.com.br/r/artigo/apos-pressoes-wagner-suspende-horario-de-verao-na-bahia
752
753# From Rodrigo Severo (2012-10-16):
754# Tocantins state will have DST.
755# https://noticias.terra.com.br/brasil/noticias/0,,OI6232536-EI306.html
756
757# From Steffen Thorsen (2013-09-20):
758# Tocantins in Brazil is very likely not to observe DST from October....
759# http://conexaoto.com.br/2013/09/18/ministerio-confirma-que-tocantins-esta-fora-do-horario-de-verao-em-2013-mas-falta-publicacao-de-decreto
760# We will keep this article updated when this is confirmed:
761# https://www.timeanddate.com/news/time/brazil-starts-dst-2013.html
762
763# From Steffen Thorsen (2013-10-17):
764# https://www.timeanddate.com/news/time/acre-amazonas-change-time-zone.html
765# Senator Jorge Viana announced that Acre will change time zone on November 10.
766# He did not specify the time of the change, nor if western parts of Amazonas
767# will change as well.
768#
769# From Paul Eggert (2013-10-17):
770# For now, assume western Amazonas will change as well.
771
772# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
773# Decree 20,466 <http://pcdsh01.on.br/HV20466.htm> (1931-10-01)
774# Decree 21,896 <http://pcdsh01.on.br/HV21896.htm> (1932-01-10)
775Rule	Brazil	1931	only	-	Oct	 3	11:00	1:00	-
776Rule	Brazil	1932	1933	-	Apr	 1	 0:00	0	-
777Rule	Brazil	1932	only	-	Oct	 3	 0:00	1:00	-
778# Decree 23,195 <http://pcdsh01.on.br/HV23195.htm> (1933-10-10)
779# revoked DST.
780# Decree 27,496 <http://pcdsh01.on.br/HV27496.htm> (1949-11-24)
781# Decree 27,998 <http://pcdsh01.on.br/HV27998.htm> (1950-04-13)
782Rule	Brazil	1949	1952	-	Dec	 1	 0:00	1:00	-
783Rule	Brazil	1950	only	-	Apr	16	 1:00	0	-
784Rule	Brazil	1951	1952	-	Apr	 1	 0:00	0	-
785# Decree 32,308 <http://pcdsh01.on.br/HV32308.htm> (1953-02-24)
786Rule	Brazil	1953	only	-	Mar	 1	 0:00	0	-
787# Decree 34,724 <http://pcdsh01.on.br/HV34724.htm> (1953-11-30)
788# revoked DST.
789# Decree 52,700 <http://pcdsh01.on.br/HV52700.htm> (1963-10-18)
790# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
791# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
792# Decree 53,071 <http://pcdsh01.on.br/HV53071.htm> (1963-12-03)
793# extended the above decree to all of the national territory on 12-09.
794Rule	Brazil	1963	only	-	Dec	 9	 0:00	1:00	-
795# Decree 53,604 <http://pcdsh01.on.br/HV53604.htm> (1964-02-25)
796# extended summer time by one day to 1964-03-01 00:00 (start of school).
797Rule	Brazil	1964	only	-	Mar	 1	 0:00	0	-
798# Decree 55,639 <http://pcdsh01.on.br/HV55639.htm> (1965-01-27)
799Rule	Brazil	1965	only	-	Jan	31	 0:00	1:00	-
800Rule	Brazil	1965	only	-	Mar	31	 0:00	0	-
801# Decree 57,303 <http://pcdsh01.on.br/HV57303.htm> (1965-11-22)
802Rule	Brazil	1965	only	-	Dec	 1	 0:00	1:00	-
803# Decree 57,843 <http://pcdsh01.on.br/HV57843.htm> (1966-02-18)
804Rule	Brazil	1966	1968	-	Mar	 1	 0:00	0	-
805Rule	Brazil	1966	1967	-	Nov	 1	 0:00	1:00	-
806# Decree 63,429 <http://pcdsh01.on.br/HV63429.htm> (1968-10-15)
807# revoked DST.
808# Decree 91,698 <http://pcdsh01.on.br/HV91698.htm> (1985-09-27)
809Rule	Brazil	1985	only	-	Nov	 2	 0:00	1:00	-
810# Decree 92,310 (1986-01-21)
811# Decree 92,463 (1986-03-13)
812Rule	Brazil	1986	only	-	Mar	15	 0:00	0	-
813# Decree 93,316 (1986-10-01)
814Rule	Brazil	1986	only	-	Oct	25	 0:00	1:00	-
815Rule	Brazil	1987	only	-	Feb	14	 0:00	0	-
816# Decree 94,922 <http://pcdsh01.on.br/HV94922.htm> (1987-09-22)
817Rule	Brazil	1987	only	-	Oct	25	 0:00	1:00	-
818Rule	Brazil	1988	only	-	Feb	 7	 0:00	0	-
819# Decree 96,676 <http://pcdsh01.on.br/HV96676.htm> (1988-09-12)
820# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
821Rule	Brazil	1988	only	-	Oct	16	 0:00	1:00	-
822Rule	Brazil	1989	only	-	Jan	29	 0:00	0	-
823# Decree 98,077 <http://pcdsh01.on.br/HV98077.htm> (1989-08-21)
824# with the same exceptions
825Rule	Brazil	1989	only	-	Oct	15	 0:00	1:00	-
826Rule	Brazil	1990	only	-	Feb	11	 0:00	0	-
827# Decree 99,530 <http://pcdsh01.on.br/HV99530.htm> (1990-09-17)
828# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
829# Decree 99,629 (1990-10-19) adds BA, MT.
830Rule	Brazil	1990	only	-	Oct	21	 0:00	1:00	-
831Rule	Brazil	1991	only	-	Feb	17	 0:00	0	-
832# Unnumbered decree <http://pcdsh01.on.br/HV1991.htm> (1991-09-25)
833# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
834Rule	Brazil	1991	only	-	Oct	20	 0:00	1:00	-
835Rule	Brazil	1992	only	-	Feb	 9	 0:00	0	-
836# Unnumbered decree <http://pcdsh01.on.br/HV1992.htm> (1992-10-16)
837# adopted by same states.
838Rule	Brazil	1992	only	-	Oct	25	 0:00	1:00	-
839Rule	Brazil	1993	only	-	Jan	31	 0:00	0	-
840# Decree 942 <http://pcdsh01.on.br/HV942.htm> (1993-09-28)
841# adopted by same states, plus AM.
842# Decree 1,252 <http://pcdsh01.on.br/HV1252.htm> (1994-09-22;
843# web page corrected 2004-01-07) adopted by same states, minus AM.
844# Decree 1,636 <http://pcdsh01.on.br/HV1636.htm> (1995-09-14)
845# adopted by same states, plus MT and TO.
846# Decree 1,674 <http://pcdsh01.on.br/HV1674.htm> (1995-10-13)
847# adds AL, SE.
848Rule	Brazil	1993	1995	-	Oct	Sun>=11	 0:00	1:00	-
849Rule	Brazil	1994	1995	-	Feb	Sun>=15	 0:00	0	-
850Rule	Brazil	1996	only	-	Feb	11	 0:00	0	-
851# Decree 2,000 <http://pcdsh01.on.br/HV2000.htm> (1996-09-04)
852# adopted by same states, minus AL, SE.
853Rule	Brazil	1996	only	-	Oct	 6	 0:00	1:00	-
854Rule	Brazil	1997	only	-	Feb	16	 0:00	0	-
855# From Daniel C. Sobral (1998-02-12):
856# In 1997, the DS began on October 6. The stated reason was that
857# because international television networks ignored Brazil's policy on DS,
858# they bought the wrong times on satellite for coverage of Pope's visit.
859# This year, the ending date of DS was postponed to March 1
860# to help dealing with the shortages of electric power.
861#
862# Decree 2,317 (1997-09-04), adopted by same states.
863Rule	Brazil	1997	only	-	Oct	 6	 0:00	1:00	-
864# Decree 2,495 <http://pcdsh01.on.br/figuras/HV2495.JPG>
865# (1998-02-10)
866Rule	Brazil	1998	only	-	Mar	 1	 0:00	0	-
867# Decree 2,780 <http://pcdsh01.on.br/figuras/Hv98.jpg> (1998-09-11)
868# adopted by the same states as before.
869Rule	Brazil	1998	only	-	Oct	11	 0:00	1:00	-
870Rule	Brazil	1999	only	-	Feb	21	 0:00	0	-
871# Decree 3,150 <http://pcdsh01.on.br/figuras/HV3150.gif>
872# (1999-08-23) adopted by same states.
873# Decree 3,188 <http://pcdsh01.on.br/DecHV99.gif> (1999-09-30)
874# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
875Rule	Brazil	1999	only	-	Oct	 3	 0:00	1:00	-
876Rule	Brazil	2000	only	-	Feb	27	 0:00	0	-
877# Decree 3,592 <http://pcdsh01.on.br/DEC3592.htm> (2000-09-06)
878# adopted by the same states as before.
879# Decree 3,630 <http://pcdsh01.on.br/Dec3630.jpg> (2000-10-13)
880# repeals DST in PE and RR, effective 2000-10-15 00:00.
881# Decree 3,632 <http://pcdsh01.on.br/Dec3632.jpg> (2000-10-17)
882# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
883# Decree 3,916 <http://pcdsh01.on.br/figuras/HV3916.gif>
884# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
885Rule	Brazil	2000	2001	-	Oct	Sun>=8	 0:00	1:00	-
886Rule	Brazil	2001	2006	-	Feb	Sun>=15	 0:00	0	-
887# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
888# 4,399 <http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm>
889Rule	Brazil	2002	only	-	Nov	 3	 0:00	1:00	-
890# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
891# 4,844 <http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm>
892Rule	Brazil	2003	only	-	Oct	19	 0:00	1:00	-
893# Decree 5,223 (2004-10-01) reestablishes DST in MT.
894# 5,223 <http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm>
895Rule	Brazil	2004	only	-	Nov	 2	 0:00	1:00	-
896# Decree 5,539 <http://pcdsh01.on.br/DecHV5539.gif> (2005-09-19),
897# adopted by the same states as before.
898Rule	Brazil	2005	only	-	Oct	16	 0:00	1:00	-
899# Decree 5,920 <http://pcdsh01.on.br/DecHV5920.gif> (2006-10-03),
900# adopted by the same states as before.
901Rule	Brazil	2006	only	-	Nov	 5	 0:00	1:00	-
902Rule	Brazil	2007	only	-	Feb	25	 0:00	0	-
903# Decree 6,212 <http://pcdsh01.on.br/DecHV6212.gif> (2007-09-26),
904# adopted by the same states as before.
905Rule	Brazil	2007	only	-	Oct	Sun>=8	 0:00	1:00	-
906# From Frederico A. C. Neves (2008-09-10):
907# According to this decree
908# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
909# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
910# 3rd Feb Sunday. There is an exception on the return date when this is
911# the Carnival Sunday then the return date will be the next Sunday...
912Rule	Brazil	2008	2017	-	Oct	Sun>=15	0:00	1:00	-
913Rule	Brazil	2008	2011	-	Feb	Sun>=15	0:00	0	-
914# Decree 7,584 <http://pcdsh01.on.br/HVdecreto7584_20111013.jpg> (2011-10-13)
915# added Bahia.
916Rule	Brazil	2012	only	-	Feb	Sun>=22	0:00	0	-
917# Decree 7,826 <http://pcdsh01.on.br/HVdecreto7826_20121015.jpg> (2012-10-15)
918# removed Bahia and added Tocantins.
919# Decree 8,112 <http://pcdsh01.on.br/HVdecreto8112_20130930.JPG> (2013-09-30)
920# removed Tocantins.
921Rule	Brazil	2013	2014	-	Feb	Sun>=15	0:00	0	-
922Rule	Brazil	2015	only	-	Feb	Sun>=22	0:00	0	-
923Rule	Brazil	2016	2022	-	Feb	Sun>=15	0:00	0	-
924# From Steffen Thorsen (2017-12-18):
925# According to many media sources, next year's DST start in Brazil will move to
926# the first Sunday of November, and it will stay like that for the years after.
927# ... https://www.timeanddate.com/news/time/brazil-delays-dst-2018.html
928# From Steffen Thorsen (2017-12-20):
929# http://www.planalto.gov.br/ccivil_03/_ato2015-2018/2017/decreto/D9242.htm
930#
931# From Fábio Gomes (2018-10-04):
932# The Brazilian president just announced a new change on this year DST.
933# It was scheduled to start on November 4th and it was changed to November 18th.
934# From Rodrigo Brüning Wessler (2018-10-15):
935# The Brazilian government just announced that the change in DST was
936# canceled....  Maybe the president Michel Temer also woke up one hour
937# earlier today. :)
938Rule	Brazil	2018	max	-	Nov	Sun>=1	0:00	1:00	-
939Rule	Brazil	2023	only	-	Feb	Sun>=22	0:00	0	-
940Rule	Brazil	2024	2025	-	Feb	Sun>=15	0:00	0	-
941Rule	Brazil	2026	only	-	Feb	Sun>=22	0:00	0	-
942Rule	Brazil	2027	2033	-	Feb	Sun>=15	0:00	0	-
943Rule	Brazil	2034	only	-	Feb	Sun>=22	0:00	0	-
944Rule	Brazil	2035	2036	-	Feb	Sun>=15	0:00	0	-
945Rule	Brazil	2037	only	-	Feb	Sun>=22	0:00	0	-
946# From Arthur David Olson (2008-09-29):
947# The next is wrong in some years but is better than nothing.
948Rule	Brazil	2038	max	-	Feb	Sun>=15	0:00	0	-
949
950# The latest ruleset listed above says that the following states observe DST:
951# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
952
953# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
954#
955# Fernando de Noronha (administratively part of PE)
956Zone America/Noronha	-2:09:40 -	LMT	1914
957			-2:00	Brazil	-02/-01	1990 Sep 17
958			-2:00	-	-02	1999 Sep 30
959			-2:00	Brazil	-02/-01	2000 Oct 15
960			-2:00	-	-02	2001 Sep 13
961			-2:00	Brazil	-02/-01	2002 Oct  1
962			-2:00	-	-02
963# Other Atlantic islands have no permanent settlement.
964# These include Trindade and Martim Vaz (administratively part of ES),
965# Rocas Atoll (RN), and the St Peter and St Paul Archipelago (PE).
966# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
967# it also included the Penedos.
968#
969# Amapá (AP), east Pará (PA)
970# East Pará includes Belém, Marabá, Serra Norte, and São Félix do Xingu.
971# The division between east and west Pará is the river Xingu.
972# In the north a very small part from the river Javary (now Jari I guess,
973# the border with Amapá) to the Amazon, then to the Xingu.
974Zone America/Belem	-3:13:56 -	LMT	1914
975			-3:00	Brazil	-03/-02	1988 Sep 12
976			-3:00	-	-03
977#
978# west Pará (PA)
979# West Pará includes Altamira, Óbidos, Prainha, Oriximiná, and Santarém.
980Zone America/Santarem	-3:38:48 -	LMT	1914
981			-4:00	Brazil	-04/-03	1988 Sep 12
982			-4:00	-	-04	2008 Jun 24  0:00
983			-3:00	-	-03
984#
985# Maranhão (MA), Piauí (PI), Ceará (CE), Rio Grande do Norte (RN),
986# Paraíba (PB)
987Zone America/Fortaleza	-2:34:00 -	LMT	1914
988			-3:00	Brazil	-03/-02	1990 Sep 17
989			-3:00	-	-03	1999 Sep 30
990			-3:00	Brazil	-03/-02	2000 Oct 22
991			-3:00	-	-03	2001 Sep 13
992			-3:00	Brazil	-03/-02	2002 Oct  1
993			-3:00	-	-03
994#
995# Pernambuco (PE) (except Atlantic islands)
996Zone America/Recife	-2:19:36 -	LMT	1914
997			-3:00	Brazil	-03/-02	1990 Sep 17
998			-3:00	-	-03	1999 Sep 30
999			-3:00	Brazil	-03/-02	2000 Oct 15
1000			-3:00	-	-03	2001 Sep 13
1001			-3:00	Brazil	-03/-02	2002 Oct  1
1002			-3:00	-	-03
1003#
1004# Tocantins (TO)
1005Zone America/Araguaina	-3:12:48 -	LMT	1914
1006			-3:00	Brazil	-03/-02	1990 Sep 17
1007			-3:00	-	-03	1995 Sep 14
1008			-3:00	Brazil	-03/-02	2003 Sep 24
1009			-3:00	-	-03	2012 Oct 21
1010			-3:00	Brazil	-03/-02	2013 Sep
1011			-3:00	-	-03
1012#
1013# Alagoas (AL), Sergipe (SE)
1014Zone America/Maceio	-2:22:52 -	LMT	1914
1015			-3:00	Brazil	-03/-02	1990 Sep 17
1016			-3:00	-	-03	1995 Oct 13
1017			-3:00	Brazil	-03/-02	1996 Sep  4
1018			-3:00	-	-03	1999 Sep 30
1019			-3:00	Brazil	-03/-02	2000 Oct 22
1020			-3:00	-	-03	2001 Sep 13
1021			-3:00	Brazil	-03/-02	2002 Oct  1
1022			-3:00	-	-03
1023#
1024# Bahia (BA)
1025# There are too many Salvadors elsewhere, so use America/Bahia instead
1026# of America/Salvador.
1027Zone America/Bahia	-2:34:04 -	LMT	1914
1028			-3:00	Brazil	-03/-02	2003 Sep 24
1029			-3:00	-	-03	2011 Oct 16
1030			-3:00	Brazil	-03/-02	2012 Oct 21
1031			-3:00	-	-03
1032#
1033# Goiás (GO), Distrito Federal (DF), Minas Gerais (MG),
1034# Espírito Santo (ES), Rio de Janeiro (RJ), São Paulo (SP), Paraná (PR),
1035# Santa Catarina (SC), Rio Grande do Sul (RS)
1036Zone America/Sao_Paulo	-3:06:28 -	LMT	1914
1037			-3:00	Brazil	-03/-02	1963 Oct 23  0:00
1038			-3:00	1:00	-02	1964
1039			-3:00	Brazil	-03/-02
1040#
1041# Mato Grosso do Sul (MS)
1042Zone America/Campo_Grande -3:38:28 -	LMT	1914
1043			-4:00	Brazil	-04/-03
1044#
1045# Mato Grosso (MT)
1046Zone America/Cuiaba	-3:44:20 -	LMT	1914
1047			-4:00	Brazil	-04/-03	2003 Sep 24
1048			-4:00	-	-04	2004 Oct  1
1049			-4:00	Brazil	-04/-03
1050#
1051# Rondônia (RO)
1052Zone America/Porto_Velho -4:15:36 -	LMT	1914
1053			-4:00	Brazil	-04/-03	1988 Sep 12
1054			-4:00	-	-04
1055#
1056# Roraima (RR)
1057Zone America/Boa_Vista	-4:02:40 -	LMT	1914
1058			-4:00	Brazil	-04/-03	1988 Sep 12
1059			-4:00	-	-04	1999 Sep 30
1060			-4:00	Brazil	-04/-03	2000 Oct 15
1061			-4:00	-	-04
1062#
1063# east Amazonas (AM): Boca do Acre, Jutaí, Manaus, Floriano Peixoto
1064# The great circle line from Tabatinga to Porto Acre divides
1065# east from west Amazonas.
1066Zone America/Manaus	-4:00:04 -	LMT	1914
1067			-4:00	Brazil	-04/-03	1988 Sep 12
1068			-4:00	-	-04	1993 Sep 28
1069			-4:00	Brazil	-04/-03	1994 Sep 22
1070			-4:00	-	-04
1071#
1072# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
1073#	Eirunepé, Envira, Ipixuna
1074Zone America/Eirunepe	-4:39:28 -	LMT	1914
1075			-5:00	Brazil	-05/-04	1988 Sep 12
1076			-5:00	-	-05	1993 Sep 28
1077			-5:00	Brazil	-05/-04	1994 Sep 22
1078			-5:00	-	-05	2008 Jun 24  0:00
1079			-4:00	-	-04	2013 Nov 10
1080			-5:00	-	-05
1081#
1082# Acre (AC)
1083Zone America/Rio_Branco	-4:31:12 -	LMT	1914
1084			-5:00	Brazil	-05/-04	1988 Sep 12
1085			-5:00	-	-05	2008 Jun 24  0:00
1086			-4:00	-	-04	2013 Nov 10
1087			-5:00	-	-05
1088
1089# Chile
1090
1091# From Paul Eggert (2015-04-03):
1092# Shanks & Pottenger says America/Santiago introduced standard time in
1093# 1890 and rounds its UT offset to 70W40; guess that in practice this
1094# was the same offset as in 1916-1919.  It also says Pacific/Easter
1095# standardized on 109W22 in 1890; assume this didn't change the clocks.
1096#
1097# Dates for America/Santiago from 1910 to 2004 are primarily from
1098# the following source, cited by Oscar van Vlijmen (2006-10-08):
1099# [1] Chile Law
1100# http://www.webexhibits.org/daylightsaving/chile.html
1101# This contains a copy of this official table:
1102# Cambios en la hora oficial de Chile desde 1900 (retrieved 2008-03-30)
1103# https://web.archive.org/web/20080330200901/http://www.horaoficial.cl/cambio.htm
1104# [1] needs several corrections, though.
1105#
1106# The first set of corrections is from:
1107# [2] History of the Official Time of Chile
1108# http://www.horaoficial.cl/ing/horaof_ing.html (retrieved 2012-03-06).  See:
1109# https://web.archive.org/web/20120306042032/http://www.horaoficial.cl/ing/horaof_ing.html
1110# This is an English translation of:
1111# Historia de la hora oficial de Chile (retrieved 2012-10-24).  See:
1112# https://web.archive.org/web/20121024234627/http://www.horaoficial.cl/horaof.htm
1113# A fancier Spanish version (requiring mouse-clicking) is at:
1114# http://www.horaoficial.cl/historia_hora.html
1115# Conflicts between [1] and [2] were resolved as follows:
1116#
1117#  - [1] says the 1910 transition was Jan 1, [2] says Jan 10 and cites
1118#    Boletín No. 1, Aviso No. 1 (1910).  Go with [2].
1119#
1120#  - [1] says SMT was -4:42:45, [2] says Chile's official time from
1121#    1916 to 1919 was -4:42:46.3, the meridian of Chile's National
1122#    Astronomical Observatory (OAN), then located in what is now
1123#    Quinta Normal in Santiago.  Go with [2], rounding it to -4:42:46.
1124#
1125#  - [1] says the 1918 transition was Sep 1, [2] says Sep 10 and cites
1126#    Boletín No. 22, Aviso No. 129/1918 (1918-08-23).  Go with [2].
1127#
1128#  - [1] does not give times for transitions; assume they occur
1129#    at midnight mainland time, the current common practice.  However,
1130#    go with [2]'s specification of 23:00 for the 1947-05-21 transition.
1131#
1132# Another correction to [1] is from Jesper Nørgaard Welen, who
1133# wrote (2006-10-08), "I think that there are some obvious mistakes in
1134# the suggested link from Oscar van Vlijmen,... for instance entry 66
1135# says that GMT-4 ended 1990-09-12 while entry 67 only begins GMT-3 at
1136# 1990-09-15 (they should have been 1990-09-15 and 1990-09-16
1137# respectively), but anyhow it clears up some doubts too."
1138#
1139# Data for Pacific/Easter from 1910 through 1967 come from Shanks &
1140# Pottenger.  After that, for lack of better info assume
1141# Pacific/Easter is always two hours behind America/Santiago;
1142# this is known to work for DST transitions starting in 2008 and
1143# may well be true for earlier transitions.
1144
1145# From Eduardo Krell (1995-10-19):
1146# The law says to switch to DST at midnight [24:00] on the second SATURDAY
1147# of October....  The law is the same for March and October.
1148# (1998-09-29):
1149# Because of the drought this year, the government decided to go into
1150# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
1151# (unless there's another dry season next year, I guess).
1152
1153# From Julio I. Pacheco Troncoso (1999-03-18):
1154# Because of the same drought, the government decided to end DST later,
1155# on April 3, (one-time change).
1156
1157# From Germán Poo-Caamaño (2008-03-03):
1158# Due to drought, Chile extends Daylight Time in three weeks.  This
1159# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1160# and Saturday 3/29 at 22:00 for Pacific/Easter)
1161# The Supreme Decree is located at
1162# http://www.shoa.cl/servicios/supremo316.pdf
1163#
1164# From José Miguel Garrido (2008-03-05):
1165# http://www.shoa.cl/noticias/2008/04hora/hora.htm
1166
1167# From Angel Chiang (2010-03-04):
1168# Subject: DST in Chile exceptionally extended to 3 April due to earthquake
1169# http://www.gobiernodechile.cl/viewNoticia.aspx?idArticulo=30098
1170#
1171# From Arthur David Olson (2010-03-06):
1172# Angel Chiang's message confirmed by Julio Pacheco; Julio provided a patch.
1173
1174# From Glenn Eychaner (2011-03-28):
1175# http://diario.elmercurio.com/2011/03/28/_portada/_portada/noticias/7565897A-CA86-49E6-9E03-660B21A4883E.htm?id=3D{7565897A-CA86-49E6-9E03-660B21A4883E}
1176# In English:
1177# Chile's clocks will go back an hour this year on the 7th of May instead
1178# of this Saturday. They will go forward again the 3rd Saturday in
1179# August, not in October as they have since 1968.
1180
1181# From Mauricio Parada (2012-02-22), translated by Glenn Eychaner (2012-02-23):
1182# As stated in the website of the Chilean Energy Ministry
1183# http://www.minenergia.cl/ministerio/noticias/generales/gobierno-anuncia-fechas-de-cambio-de.html
1184# The Chilean Government has decided to postpone the entrance into winter time
1185# (to leave DST) from March 11 2012 to April 28th 2012....
1186# Quote from the website communication:
1187#
1188# 6. For the year 2012, the dates of entry into winter time will be as follows:
1189# a. Saturday April 28, 2012, clocks should go back 60 minutes; that is, at
1190# 23:59:59, instead of passing to 0:00, the time should be adjusted to be 23:00
1191# of the same day.
1192# b. Saturday, September 1, 2012, clocks should go forward 60 minutes; that is,
1193# at 23:59:59, instead of passing to 0:00, the time should be adjusted to be
1194# 01:00 on September 2.
1195
1196# From Steffen Thorsen (2013-02-15):
1197# According to several news sources, Chile has extended DST this year,
1198# they will end DST later and start DST earlier than planned.  They
1199# hope to save energy.  The new end date is 2013-04-28 00:00 and new
1200# start date is 2013-09-08 00:00....
1201# http://www.gob.cl/informa/2013/02/15/gobierno-anuncia-fechas-de-cambio-de-hora-para-el-ano-2013.htm
1202
1203# From José Miguel Garrido (2014-02-19):
1204# Today appeared in the Diario Oficial a decree amending the time change
1205# dates to 2014.
1206# DST End: last Saturday of April 2014 (Sun 27 Apr 2014 03:00 UTC)
1207# DST Start: first Saturday of September 2014 (Sun 07 Sep 2014 04:00 UTC)
1208# http://www.diariooficial.interior.gob.cl//media/2014/02/19/do-20140219.pdf
1209
1210# From Eduardo Romero Urra (2015-03-03):
1211# Today has been published officially that Chile will use the DST time
1212# permanently until March 25 of 2017
1213# http://www.diariooficial.interior.gob.cl/media/2015/03/03/1-large.jpg
1214#
1215# From Paul Eggert (2015-03-03):
1216# For now, assume that the extension will persist indefinitely.
1217
1218# From Juan Correa (2016-03-18):
1219# The decree regarding DST has been published in today's Official Gazette:
1220# http://www.diariooficial.interior.gob.cl/versiones-anteriores/do/20160318/
1221# http://www.leychile.cl/Navegar?idNorma=1088502
1222# It does consider the second Saturday of May and August as the dates
1223# for the transition; and it lists DST dates until 2019, but I think
1224# this scheme will stick.
1225#
1226# From Paul Eggert (2016-03-18):
1227# For now, assume the pattern holds for the indefinite future.
1228# The decree says transitions occur at 24:00; in practice this appears
1229# to mean 24:00 mainland time, not 24:00 local time, so that Easter
1230# Island is always two hours behind the mainland.
1231
1232# From Juan Correa (2016-12-04):
1233# Magallanes region ... will keep DST (UTC -3) all year round....
1234# 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
1235#
1236# From Deborah Goldsmith (2017-01-19):
1237# http://www.diariooficial.interior.gob.cl/publicaciones/2017/01/17/41660/01/1169626.pdf
1238# From Paul Eggert (2017-01-19):
1239# The above says the Magallanes change expires 2019-05-11 at 24:00,
1240# so in theory, they will revert to -04/-03 after that, which means
1241# they will switch from -03 to -04 one hour after Santiago does that day.
1242# For now, assume that they will not revert.
1243
1244# From Juan Correa (2018-08-13):
1245# As of moments ago, the Ministry of Energy in Chile has announced the new
1246# schema for DST. ...  Announcement in video (in Spanish):
1247# https://twitter.com/MinEnergia/status/1029000399129374720
1248# From Yonathan Dossow (2018-08-13):
1249# The video says "first Saturday of September", we all know it means Sunday at
1250# midnight.
1251# From Tim Parenti (2018-08-13):
1252# Translating the captions on the video at 0:44-0:55, "We want to announce as
1253# Government that from 2019, Winter Time will be increased to 5 months, between
1254# the first Saturday of April and the first Saturday of September."
1255# At 2:08-2:20, "The Magallanes region will maintain its current time, as
1256# decided by the citizens during 2017, but our Government will promote a
1257# regional dialogue table to gather their opinion on this matter."
1258# https://twitter.com/MinEnergia/status/1029009354001973248
1259# "We will keep the new time policy unchanged for at least the next 4 years."
1260# So we extend the new rules on Saturdays at 24:00 mainland time indefinitely.
1261
1262# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1263Rule	Chile	1927	1931	-	Sep	 1	0:00	1:00	-
1264Rule	Chile	1928	1932	-	Apr	 1	0:00	0	-
1265Rule	Chile	1968	only	-	Nov	 3	4:00u	1:00	-
1266Rule	Chile	1969	only	-	Mar	30	3:00u	0	-
1267Rule	Chile	1969	only	-	Nov	23	4:00u	1:00	-
1268Rule	Chile	1970	only	-	Mar	29	3:00u	0	-
1269Rule	Chile	1971	only	-	Mar	14	3:00u	0	-
1270Rule	Chile	1970	1972	-	Oct	Sun>=9	4:00u	1:00	-
1271Rule	Chile	1972	1986	-	Mar	Sun>=9	3:00u	0	-
1272Rule	Chile	1973	only	-	Sep	30	4:00u	1:00	-
1273Rule	Chile	1974	1987	-	Oct	Sun>=9	4:00u	1:00	-
1274Rule	Chile	1987	only	-	Apr	12	3:00u	0	-
1275Rule	Chile	1988	1990	-	Mar	Sun>=9	3:00u	0	-
1276Rule	Chile	1988	1989	-	Oct	Sun>=9	4:00u	1:00	-
1277Rule	Chile	1990	only	-	Sep	16	4:00u	1:00	-
1278Rule	Chile	1991	1996	-	Mar	Sun>=9	3:00u	0	-
1279Rule	Chile	1991	1997	-	Oct	Sun>=9	4:00u	1:00	-
1280Rule	Chile	1997	only	-	Mar	30	3:00u	0	-
1281Rule	Chile	1998	only	-	Mar	Sun>=9	3:00u	0	-
1282Rule	Chile	1998	only	-	Sep	27	4:00u	1:00	-
1283Rule	Chile	1999	only	-	Apr	 4	3:00u	0	-
1284Rule	Chile	1999	2010	-	Oct	Sun>=9	4:00u	1:00	-
1285Rule	Chile	2000	2007	-	Mar	Sun>=9	3:00u	0	-
1286# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1287# which is used below in specifying the transition.
1288Rule	Chile	2008	only	-	Mar	30	3:00u	0	-
1289Rule	Chile	2009	only	-	Mar	Sun>=9	3:00u	0	-
1290Rule	Chile	2010	only	-	Apr	Sun>=1	3:00u	0	-
1291Rule	Chile	2011	only	-	May	Sun>=2	3:00u	0	-
1292Rule	Chile	2011	only	-	Aug	Sun>=16	4:00u	1:00	-
1293Rule	Chile	2012	2014	-	Apr	Sun>=23	3:00u	0	-
1294Rule	Chile	2012	2014	-	Sep	Sun>=2	4:00u	1:00	-
1295Rule	Chile	2016	2018	-	May	Sun>=9	3:00u	0	-
1296Rule	Chile	2016	2018	-	Aug	Sun>=9	4:00u	1:00	-
1297Rule	Chile	2019	max	-	Apr	Sun>=2	3:00u	0	-
1298Rule	Chile	2019	max	-	Sep	Sun>=2	4:00u	1:00	-
1299# IATA SSIM anomalies: (1992-02) says 1992-03-14;
1300# (1996-09) says 1998-03-08.  Ignore these.
1301# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1302Zone America/Santiago	-4:42:46 -	LMT	1890
1303			-4:42:46 -	SMT	1910 Jan 10 # Santiago Mean Time
1304			-5:00	-	-05	1916 Jul  1
1305			-4:42:46 -	SMT	1918 Sep 10
1306			-4:00	-	-04	1919 Jul  1
1307			-4:42:46 -	SMT	1927 Sep  1
1308			-5:00	Chile	-05/-04	1932 Sep  1
1309			-4:00	-	-04	1942 Jun  1
1310			-5:00	-	-05	1942 Aug  1
1311			-4:00	-	-04	1946 Jul 15
1312			-4:00	1:00	-03	1946 Sep  1 # central Chile
1313			-4:00	-	-04	1947 Apr  1
1314			-5:00	-	-05	1947 May 21 23:00
1315			-4:00	Chile	-04/-03
1316Zone America/Punta_Arenas -4:43:40 -	LMT	1890
1317			-4:42:46 -	SMT	1910 Jan 10
1318			-5:00	-	-05	1916 Jul  1
1319			-4:42:46 -	SMT	1918 Sep 10
1320			-4:00	-	-04	1919 Jul  1
1321			-4:42:46 -	SMT	1927 Sep  1
1322			-5:00	Chile	-05/-04	1932 Sep  1
1323			-4:00	-	-04	1942 Jun  1
1324			-5:00	-	-05	1942 Aug  1
1325			-4:00	-	-04	1947 Apr  1
1326			-5:00	-	-05	1947 May 21 23:00
1327			-4:00	Chile	-04/-03	2016 Dec  4
1328			-3:00	-	-03
1329Zone Pacific/Easter	-7:17:28 -	LMT	1890
1330			-7:17:28 -	EMT	1932 Sep    # Easter Mean Time
1331			-7:00	Chile	-07/-06	1982 Mar 14 3:00u # Easter Time
1332			-6:00	Chile	-06/-05
1333#
1334# Salas y Gómez Island is uninhabited.
1335# Other Chilean locations, including Juan Fernández Is, Desventuradas Is,
1336# and Antarctic bases, are like America/Santiago.
1337
1338# Antarctic base using South American rules
1339# (See the file 'antarctica' for more.)
1340#
1341# Palmer, Anvers Island, since 1965 (moved 2 miles in 1968)
1342#
1343# From Ethan Dicks (1996-10-06):
1344# It keeps the same time as Punta Arenas, Chile, because, just like us
1345# and the South Pole, that's the other end of their supply line....
1346# I verified with someone who was there that since 1980,
1347# Palmer has followed Chile.  Prior to that, before the Falklands War,
1348# Palmer used to be supplied from Argentina.
1349#
1350# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1351Zone Antarctica/Palmer	0	-	-00	1965
1352			-4:00	Arg	-04/-03	1969 Oct  5
1353			-3:00	Arg	-03/-02	1982 May
1354			-4:00	Chile	-04/-03	2016 Dec  4
1355			-3:00	-	-03
1356
1357# Colombia
1358
1359# Milne gives 4:56:16.4 for Bogotá time in 1899; round to nearest.  He writes,
1360# "A variation of fifteen minutes in the public clocks of Bogota is not rare."
1361
1362# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1363Rule	CO	1992	only	-	May	 3	0:00	1:00	-
1364Rule	CO	1993	only	-	Apr	 4	0:00	0	-
1365# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1366Zone	America/Bogota	-4:56:16 -	LMT	1884 Mar 13
1367			-4:56:16 -	BMT	1914 Nov 23 # Bogotá Mean Time
1368			-5:00	CO	-05/-04
1369# Malpelo, Providencia, San Andres
1370# no information; probably like America/Bogota
1371
1372# Curaçao
1373
1374# Milne gives 4:35:46.9 for Curaçao mean time; round to nearest.
1375#
1376# From Paul Eggert (2006-03-22):
1377# Shanks & Pottenger say that The Bottom and Philipsburg have been at
1378# -4:00 since standard time was introduced on 1912-03-02; and that
1379# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1380# 1912-02-02 to 1965-01-01.  The former is dubious, since S&P also say
1381# Saba Island has been like Curaçao.
1382# This all predates our 1970 cutoff, though.
1383#
1384# By July 2007 Curaçao and St Maarten are planned to become
1385# associated states within the Netherlands, much like Aruba;
1386# Bonaire, Saba and St Eustatius would become directly part of the
1387# Netherlands as Kingdom Islands.  This won't affect their time zones
1388# though, as far as we know.
1389#
1390# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1391Zone	America/Curacao	-4:35:47 -	LMT	1912 Feb 12 # Willemstad
1392			-4:30	-	-0430	1965
1393			-4:00	-	AST
1394
1395# From Arthur David Olson (2011-06-15):
1396# use links for places with new iso3166 codes.
1397# The name "Lower Prince's Quarter" is both longer than fourteen characters
1398# and contains an apostrophe; use "Lower_Princes" below.
1399
1400Link	America/Curacao	America/Lower_Princes	# Sint Maarten
1401Link	America/Curacao	America/Kralendijk	# Caribbean Netherlands
1402
1403# Ecuador
1404#
1405# Milne says the Central and South American Telegraph Company used -5:24:15.
1406#
1407# From Alois Treindl (2016-12-15):
1408# https://www.elcomercio.com/actualidad/hora-sixto-1993.html
1409# ... Whether the law applied also to Galápagos, I do not know.
1410# From Paul Eggert (2016-12-15):
1411# https://www.elcomercio.com/afull/modificacion-husohorario-ecuador-presidentes-decreto.html
1412# This says President Sixto Durán Ballén signed decree No. 285, which
1413# established DST from 1992-11-28 to 1993-02-05; it does not give transition
1414# times.  The people called it "hora de Sixto" ("Sixto hour").  The change did
1415# not go over well; a popular song "Qué hora es" by Jaime Guevara had lyrics
1416# that included "Amanecía en mitad de la noche, los guaguas iban a clase sin
1417# sol" ("It was dawning in the middle of the night, the buses went to class
1418# without sun").  Although Ballén's campaign slogan was "Ni un paso atrás"
1419# (Not one step back), the clocks went back in 1993 and the experiment was not
1420# repeated.  For now, assume transitions were at 00:00 local time country-wide.
1421#
1422# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1423Rule	Ecuador	1992	only	-	Nov	28	0:00	1:00	-
1424Rule	Ecuador	1993	only	-	Feb	 5	0:00	0	-
1425#
1426# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1427Zone America/Guayaquil	-5:19:20 -	LMT	1890
1428			-5:14:00 -	QMT	1931 # Quito Mean Time
1429			-5:00	Ecuador	-05/-04
1430Zone Pacific/Galapagos	-5:58:24 -	LMT	1931 # Puerto Baquerizo Moreno
1431			-5:00	-	-05	1986
1432			-6:00	Ecuador	-06/-05
1433
1434# Falklands
1435
1436# From Paul Eggert (2006-03-22):
1437# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1438# the IATA gives 1996-09-08.  Go with Shanks & Pottenger.
1439
1440# From Falkland Islands Government Office, London (2001-01-22)
1441# via Jesper Nørgaard:
1442# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1443# April 2001 and advance one hour to summer time at 2 am on Sunday 2
1444# September.  It is anticipated that the clocks will revert back at 2
1445# am on Sunday 21 April 2002 and advance to summer time at 2 am on
1446# Sunday 1 September.
1447
1448# From Rives McDow (2001-02-13):
1449#
1450# I have communicated several times with people there, and the last
1451# time I had communications that was helpful was in 1998.  Here is
1452# what was said then:
1453#
1454# "The general rule was that Stanley used daylight saving and the Camp
1455# did not. However for various reasons many people in the Camp have
1456# started to use daylight saving (known locally as 'Stanley Time')
1457# There is no rule as to who uses daylight saving - it is a matter of
1458# personal choice and so it is impossible to draw a map showing who
1459# uses it and who does not. Any list would be out of date as soon as
1460# it was produced. This year daylight saving ended on April 18/19th
1461# and started again on September 12/13th.  I do not know what the rule
1462# is, but can find out if you like.  We do not change at the same time
1463# as UK or Chile."
1464#
1465# I did have in my notes that the rule was "Second Saturday in Sep at
1466# 0:00 until third Saturday in Apr at 0:00".  I think that this does
1467# not agree in some cases with Shanks; is this true?
1468#
1469# Also, there is no mention in the list that some areas in the
1470# Falklands do not use DST.  I have found in my communications there
1471# that these areas are on the western half of East Falkland and all of
1472# West Falkland.  Stanley is the only place that consistently observes
1473# DST.  Again, as in other places in the world, the farmers don't like
1474# it.  West Falkland is almost entirely sheep farmers.
1475#
1476# I know one lady there that keeps a list of which farm keeps DST and
1477# which doesn't each year.  She runs a shop in Stanley, and says that
1478# the list changes each year.  She uses it to communicate to her
1479# customers, catching them when they are home for lunch or dinner.
1480
1481# From Paul Eggert (2001-03-05):
1482# For now, we'll just record the time in Stanley, since we have no
1483# better info.
1484
1485# From Steffen Thorsen (2011-04-01):
1486# The Falkland Islands will not turn back clocks this winter, but stay on
1487# daylight saving time.
1488#
1489# One source:
1490# http://www.falklandnews.com/public/story.cfm?get=5914&source=3
1491#
1492# We have gotten this confirmed by a clerk of the legislative assembly:
1493# Normally the clocks revert to Local Mean Time (UTC/GMT -4 hours) on the
1494# third Sunday of April at 0200hrs and advance to Summer Time (UTC/GMT -3
1495# hours) on the first Sunday of September at 0200hrs.
1496#
1497# IMPORTANT NOTE: During 2011, on a trial basis, the Falkland Islands
1498# will not revert to local mean time, but clocks will remain on Summer
1499# time (UTC/GMT - 3 hours) throughout the whole of 2011.  Any long term
1500# change to local time following the trial period will be notified.
1501#
1502# From Andrew Newman (2012-02-24)
1503# A letter from Justin McPhee, Chief Executive,
1504# Cable & Wireless Falkland Islands (dated 2012-02-22)
1505# states...
1506#   The current Atlantic/Stanley entry under South America expects the
1507#   clocks to go back to standard Falklands Time (FKT) on the 15th April.
1508#   The database entry states that in 2011 Stanley was staying on fixed
1509#   summer time on a trial basis only.  FIG need to contact IANA and/or
1510#   the maintainers of the database to inform them we're adopting
1511#   the same policy this year and suggest recommendations for future years.
1512#
1513# For now we will assume permanent -03 for the Falklands
1514# until advised differently (to apply for 2012 and beyond, after the 2011
1515# experiment was apparently successful.)
1516# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1517Rule	Falk	1937	1938	-	Sep	lastSun	0:00	1:00	-
1518Rule	Falk	1938	1942	-	Mar	Sun>=19	0:00	0	-
1519Rule	Falk	1939	only	-	Oct	1	0:00	1:00	-
1520Rule	Falk	1940	1942	-	Sep	lastSun	0:00	1:00	-
1521Rule	Falk	1943	only	-	Jan	1	0:00	0	-
1522Rule	Falk	1983	only	-	Sep	lastSun	0:00	1:00	-
1523Rule	Falk	1984	1985	-	Apr	lastSun	0:00	0	-
1524Rule	Falk	1984	only	-	Sep	16	0:00	1:00	-
1525Rule	Falk	1985	2000	-	Sep	Sun>=9	0:00	1:00	-
1526Rule	Falk	1986	2000	-	Apr	Sun>=16	0:00	0	-
1527Rule	Falk	2001	2010	-	Apr	Sun>=15	2:00	0	-
1528Rule	Falk	2001	2010	-	Sep	Sun>=1	2:00	1:00	-
1529# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1530Zone Atlantic/Stanley	-3:51:24 -	LMT	1890
1531			-3:51:24 -	SMT	1912 Mar 12 # Stanley Mean Time
1532			-4:00	Falk	-04/-03	1983 May
1533			-3:00	Falk	-03/-02	1985 Sep 15
1534			-4:00	Falk	-04/-03	2010 Sep  5  2:00
1535			-3:00	-	-03
1536
1537# French Guiana
1538# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1539Zone America/Cayenne	-3:29:20 -	LMT	1911 Jul
1540			-4:00	-	-04	1967 Oct
1541			-3:00	-	-03
1542
1543# Guyana
1544# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1545Zone	America/Guyana	-3:52:40 -	LMT	1915 Mar    # Georgetown
1546			-3:45	-	-0345	1975 Jul 31
1547			-3:00	-	-03	1991
1548# IATA SSIM (1996-06) says -4:00.  Assume a 1991 switch.
1549			-4:00	-	-04
1550
1551# Paraguay
1552#
1553# From Paul Eggert (2006-03-22):
1554# Shanks & Pottenger say that spring transitions are 01:00 -> 02:00,
1555# and autumn transitions are 00:00 -> 23:00.  Go with pre-1999
1556# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1557#
1558# From Waldemar Villamayor-Venialbo (2013-09-20):
1559# No time of the day is established for the adjustment, so people normally
1560# adjust their clocks at 0 hour of the given dates.
1561#
1562# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1563Rule	Para	1975	1988	-	Oct	 1	0:00	1:00	-
1564Rule	Para	1975	1978	-	Mar	 1	0:00	0	-
1565Rule	Para	1979	1991	-	Apr	 1	0:00	0	-
1566Rule	Para	1989	only	-	Oct	22	0:00	1:00	-
1567Rule	Para	1990	only	-	Oct	 1	0:00	1:00	-
1568Rule	Para	1991	only	-	Oct	 6	0:00	1:00	-
1569Rule	Para	1992	only	-	Mar	 1	0:00	0	-
1570Rule	Para	1992	only	-	Oct	 5	0:00	1:00	-
1571Rule	Para	1993	only	-	Mar	31	0:00	0	-
1572Rule	Para	1993	1995	-	Oct	 1	0:00	1:00	-
1573Rule	Para	1994	1995	-	Feb	lastSun	0:00	0	-
1574Rule	Para	1996	only	-	Mar	 1	0:00	0	-
1575# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1576# From Steffen Thorsen (2000-10-02):
1577# I have three independent reports that Paraguay changed to DST this Sunday
1578# (10-01).
1579#
1580# Translated by Gwillim Law (2001-02-27) from
1581# Noticias, a daily paper in Asunción, Paraguay (2000-10-01):
1582# http://www.diarionoticias.com.py/011000/nacional/naciona1.htm
1583# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1584# fulfillment of Decree No. 7,273 of the Executive Power....  The time change
1585# system has been operating for several years.  Formerly there was a separate
1586# decree each year; the new law has the same effect, but permanently.  Every
1587# year, the time will change on the first Sunday of October; likewise, the
1588# clock will be set back on the first Sunday of March.
1589#
1590Rule	Para	1996	2001	-	Oct	Sun>=1	0:00	1:00	-
1591# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1592Rule	Para	1997	only	-	Feb	lastSun	0:00	0	-
1593# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1594# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1595Rule	Para	1998	2001	-	Mar	Sun>=1	0:00	0	-
1596# From Rives McDow (2002-02-28):
1597# A decree was issued in Paraguay (No. 16350) on 2002-02-26 that changed the
1598# dst method to be from the first Sunday in September to the first Sunday in
1599# April.
1600Rule	Para	2002	2004	-	Apr	Sun>=1	0:00	0	-
1601Rule	Para	2002	2003	-	Sep	Sun>=1	0:00	1:00	-
1602#
1603# From Jesper Nørgaard Welen (2005-01-02):
1604# There are several sources that claim that Paraguay made
1605# a timezone rule change in autumn 2004.
1606# From Steffen Thorsen (2005-01-05):
1607# Decree 1,867 (2004-03-05)
1608# From Carlos Raúl Perasso via Jesper Nørgaard Welen (2006-10-13)
1609# http://www.presidencia.gov.py/decretos/D1867.pdf
1610Rule	Para	2004	2009	-	Oct	Sun>=15	0:00	1:00	-
1611Rule	Para	2005	2009	-	Mar	Sun>=8	0:00	0	-
1612# From Carlos Raúl Perasso (2010-02-18):
1613# By decree number 3958 issued yesterday
1614# http://www.presidencia.gov.py/v1/wp-content/uploads/2010/02/decreto3958.pdf
1615# Paraguay changes its DST schedule, postponing the March rule to April and
1616# modifying the October date. The decree reads:
1617# ...
1618# Art. 1. It is hereby established that from the second Sunday of the month of
1619# April of this year (2010), the official time is to be set back 60 minutes,
1620# and that on the first Sunday of the month of October, it is to be set
1621# forward 60 minutes, in all the territory of the Paraguayan Republic.
1622# ...
1623Rule	Para	2010	max	-	Oct	Sun>=1	0:00	1:00	-
1624Rule	Para	2010	2012	-	Apr	Sun>=8	0:00	0	-
1625#
1626# From Steffen Thorsen (2013-03-07):
1627# Paraguay will end DST on 2013-03-24 00:00....
1628# http://www.ande.gov.py/interna.php?id=1075
1629#
1630# From Carlos Raúl Perasso (2013-03-15):
1631# The change in Paraguay is now final.  Decree number 10780
1632# http://www.presidencia.gov.py/uploads/pdf/presidencia-3b86ff4b691c79d4f5927ca964922ec74772ce857c02ca054a52a37b49afc7fb.pdf
1633# From Carlos Raúl Perasso (2014-02-28):
1634# Decree 1264 can be found at:
1635# http://www.presidencia.gov.py/archivos/documentos/DECRETO1264_ey9r8zai.pdf
1636Rule	Para	2013	max	-	Mar	Sun>=22	0:00	0	-
1637
1638# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1639Zone America/Asuncion	-3:50:40 -	LMT	1890
1640			-3:50:40 -	AMT	1931 Oct 10 # Asunción Mean Time
1641			-4:00	-	-04	1972 Oct
1642			-3:00	-	-03	1974 Apr
1643			-4:00	Para	-04/-03
1644
1645# Peru
1646#
1647# From Evelyn C. Leeper via Mark Brader (2003-10-26)
1648# <news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net>:
1649# When we were in Peru in 1985-1986, they apparently switched over
1650# sometime between December 29 and January 3 while we were on the Amazon.
1651#
1652# From Paul Eggert (2006-03-22):
1653# Shanks & Pottenger don't have this transition.  Assume 1986 was like 1987.
1654
1655# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1656Rule	Peru	1938	only	-	Jan	 1	0:00	1:00	-
1657Rule	Peru	1938	only	-	Apr	 1	0:00	0	-
1658Rule	Peru	1938	1939	-	Sep	lastSun	0:00	1:00	-
1659Rule	Peru	1939	1940	-	Mar	Sun>=24	0:00	0	-
1660Rule	Peru	1986	1987	-	Jan	 1	0:00	1:00	-
1661Rule	Peru	1986	1987	-	Apr	 1	0:00	0	-
1662Rule	Peru	1990	only	-	Jan	 1	0:00	1:00	-
1663Rule	Peru	1990	only	-	Apr	 1	0:00	0	-
1664# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1665Rule	Peru	1994	only	-	Jan	 1	0:00	1:00	-
1666Rule	Peru	1994	only	-	Apr	 1	0:00	0	-
1667# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1668Zone	America/Lima	-5:08:12 -	LMT	1890
1669			-5:08:36 -	LMT	1908 Jul 28 # Lima Mean Time?
1670			-5:00	Peru	-05/-04
1671
1672# South Georgia
1673# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1674Zone Atlantic/South_Georgia -2:26:08 -	LMT	1890 # Grytviken
1675			-2:00	-	-02
1676
1677# South Sandwich Is
1678# uninhabited; scientific personnel have wintered
1679
1680# Suriname
1681# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1682Zone America/Paramaribo	-3:40:40 -	LMT	1911
1683			-3:40:52 -	PMT	1935     # Paramaribo Mean Time
1684			-3:40:36 -	PMT	1945 Oct    # The capital moved?
1685			-3:30	-	-0330	1984 Oct
1686			-3:00	-	-03
1687
1688# Trinidad and Tobago
1689# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1690Zone America/Port_of_Spain -4:06:04 -	LMT	1912 Mar 2
1691			-4:00	-	AST
1692
1693# These all agree with Trinidad and Tobago since 1970.
1694Link America/Port_of_Spain America/Anguilla
1695Link America/Port_of_Spain America/Antigua
1696Link America/Port_of_Spain America/Dominica
1697Link America/Port_of_Spain America/Grenada
1698Link America/Port_of_Spain America/Guadeloupe
1699Link America/Port_of_Spain America/Marigot	# St Martin (French part)
1700Link America/Port_of_Spain America/Montserrat
1701Link America/Port_of_Spain America/St_Barthelemy # St Barthélemy
1702Link America/Port_of_Spain America/St_Kitts	# St Kitts & Nevis
1703Link America/Port_of_Spain America/St_Lucia
1704Link America/Port_of_Spain America/St_Thomas	# Virgin Islands (US)
1705Link America/Port_of_Spain America/St_Vincent
1706Link America/Port_of_Spain America/Tortola	# Virgin Islands (UK)
1707
1708# Uruguay
1709# From Paul Eggert (1993-11-18):
1710# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1711#
1712# From Tim Parenti (2018-02-20), per Jeremie Bonjour (2018-01-31) and Michael
1713# Deckers (2018-02-20):
1714# ... At least they kept good records...
1715#
1716# http://www.armada.mil.uy/ContenidosPDFs/sohma/web/almanaque/almanaque_2018.pdf#page=36
1717# Page 36 of Almanaque 2018, published by the Oceanography, Hydrography, and
1718# Meteorology Service of the Uruguayan Navy, seems to give many transitions
1719# with greater clarity than we've had before.  It directly references many laws
1720# and decrees which are, in turn, referenced below.  They can be viewed in the
1721# public archives of the Diario Oficial (in Spanish) at
1722# http://www.impo.com.uy/diariooficial/
1723#
1724# Ley No. 3920 of 1908-06-10 placed the determination of legal time under the
1725# auspices of the National Institute for the Prediction of Time.  It is unclear
1726# exactly what offset was used during this period, though Ley No. 7200 of
1727# 1920-04-23 used the Observatory of the National Meteorological Institute in
1728# Montevideo (34° 54' 33" S, 56° 12' 45" W) as its reference meridian,
1729# retarding legal time by 15 minutes 9 seconds from 1920-04-30 24:00,
1730# resulting in UT-04.  Assume the corresponding LMT of UT-03:44:51 (given on
1731# page 725 of the Proceedings of the Second Pan-American Scientific Congress,
1732# 1915-1916) was in use, and merely became official from 1908-06-10.
1733# https://www.impo.com.uy/diariooficial/1908/06/18/12
1734# https://www.impo.com.uy/diariooficial/1920/04/27/9
1735#
1736# Ley No. 7594 of 1923-06-28 specified legal time as Observatory time advanced
1737# by 44 minutes 51 seconds (UT-03) "from 30 September to 31 March", and by 14
1738# minutes 51 seconds (UT-03:30) "the rest of the year"; a message from the
1739# National Council of Administration the same day, published directly below the
1740# law in the Diario Oficial, specified the first transition to be 1923-09-30
1741# 24:00.  This effectively established standard time at UT-03:30 with 30
1742# minutes DST.  Assume transitions at 24:00 on the specified days until Ley No.
1743# 7919 of 1926-03-05 ended this arrangement, repealing all "laws and other
1744# provisions which oppose" it, resulting in year-round UT-03:30; a Resolución
1745# of 1926-03-11 puts the final transition at 1926-03-31 24:00, the same as it
1746# would have been under the previous law.
1747# https://www.impo.com.uy/diariooficial/1923/07/02/2
1748# https://www.impo.com.uy/diariooficial/1926/03/10/2
1749# https://www.impo.com.uy/diariooficial/1926/03/18/2
1750#
1751# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
1752Rule	Uruguay	1923	1925	-	Oct	 1	 0:00	0:30	-
1753Rule	Uruguay	1924	1926	-	Apr	 1	 0:00	0	-
1754# From Tim Parenti (2018-02-15):
1755# http://www.impo.com.uy/diariooficial/1933/10/27/6
1756#
1757# It appears Ley No. 9122 of 1933 was never published as such in the Diario
1758# Oficial, but instead appeared as Document 26 in the Diario on Friday
1759# 1933-10-27 as a decree made Monday 1933-10-23 and filed under the Ministry of
1760# National Defense.  It reinstituted a DST of 30 minutes (to UT-03) "from the
1761# last Sunday of October...until the last Saturday of March."  In accordance
1762# with this provision, the first transition was explicitly specified in Article
1763# 2 of the decree as Saturday 1933-10-28 at 24:00; that is, Sunday 1933-10-29
1764# at 00:00.  Assume transitions at 00:00 Sunday throughout.
1765#
1766# Departing from the matter-of-fact nature of previous timekeeping laws, the
1767# 1933 decree "consider[s] the advantages of...the advance of legal time":
1768#
1769#   "Whereas: The measure adopted by almost all nations at the time of the last
1770#    World War still persists in North America and Europe, precisely because of
1771#    the economic, hygienic, and social advantages derived from such an
1772#    emergency measure...
1773#
1774#    Whereas: The advance of the legal time during the summer seasons, by
1775#    displacing social activity near sunrise, favors the citizen populations
1776#    and especially the society that creates and works..."
1777#
1778# It further specified that "necessary measures" be taken to ensure that
1779# "public spectacles finish, in general, before [01:00]."
1780Rule	Uruguay	1933	1938	-	Oct	lastSun	 0:00	0:30	-
1781Rule	Uruguay	1934	1941	-	Mar	lastSat	24:00	0	-
1782# From Tim Parenti (2018-02-15):
1783# Most of the Rules below, and their contemporaneous Zone lines, have been
1784# updated simply to match the Almanaque 2018.  Although the document does not
1785# list exact transition times, midnight transitions were already present in our
1786# data here for all transitions through 2004-09, and this is both consistent
1787# with prior transitions and verified in several decrees marked below between
1788# 1939-09 and 2004-09, wherein the relevant text was typically of the form:
1789#
1790#   "From 0 hours on [date], the legal time of the entire Republic will be...
1791#
1792#    In accordance with [the preceding], on [previous date] at 24 hours, all
1793#    clocks throughout the Republic will be [advanced/retarded] by..."
1794#
1795# It is possible that there is greater specificity to be found for the Rules
1796# below, but it is buried in no fewer than 40 different decrees individually
1797# referenced by the Almanaque for the period from 1939-09 to 2014-09.
1798# Four-fifths of these were promulgated less than two weeks before taking
1799# effect; more than half within a week and none more than 5 weeks.  Only the
1800# handful with comments below have been checked with any thoroughness.
1801Rule	Uruguay	1939	only	-	Oct	 1	 0:00	0:30	-
1802Rule	Uruguay	1940	only	-	Oct	27	 0:00	0:30	-
1803# From Tim Parenti (2018-02-15):
1804# Decreto 1145 of the Ministry of National Defense, dated 1941-07-26, specified
1805# UT-03 from Friday 1941-08-01 00:00, citing an "urgent...need to save fuel".
1806# http://www.impo.com.uy/diariooficial/1941/08/04/1
1807Rule	Uruguay	1941	only	-	Aug	 1	 0:00	0:30	-
1808# From Tim Parenti (2018-02-15):
1809# Decreto 1866 of the Ministry of National Defense, dated 1942-12-09, specified
1810# further advancement (to UT-02:30) from Sunday 1942-12-13 24:00.  Since clocks
1811# never went back to UT-03:30 thereafter, this is modeled as advancing standard
1812# time by 30 minutes to UT-03, while retaining 30 minutes of DST.
1813# http://www.impo.com.uy/diariooficial/1942/12/16/3
1814Rule	Uruguay	1942	only	-	Dec	14	 0:00	0:30	-
1815Rule	Uruguay	1943	only	-	Mar	14	 0:00	0	-
1816Rule	Uruguay	1959	only	-	May	24	 0:00	0:30	-
1817Rule	Uruguay	1959	only	-	Nov	15	 0:00	0	-
1818Rule	Uruguay	1960	only	-	Jan	17	 0:00	1:00	-
1819Rule	Uruguay	1960	only	-	Mar	 6	 0:00	0	-
1820Rule	Uruguay	1965	only	-	Apr	 4	 0:00	1:00	-
1821Rule	Uruguay	1965	only	-	Sep	26	 0:00	0	-
1822# From Tim Parenti (2018-02-15):
1823# Decreto 321/968 of 1968-05-25, citing emergency drought measures decreed the
1824# day before, brought clocks forward 30 minutes from Monday 1968-05-27 00:00.
1825# http://www.impo.com.uy/diariooficial/1968/05/30/5
1826Rule	Uruguay	1968	only	-	May	27	 0:00	0:30	-
1827Rule	Uruguay	1968	only	-	Dec	 1	 0:00	0	-
1828# From Tim Parenti (2018-02-15):
1829# Decreto 188/970 of 1970-04-23 instituted restrictions on electricity
1830# consumption "as a consequence of the current rainfall regime in the country".
1831# Articles 13 and 14 advanced clocks by an hour from Saturday 1970-04-25 00:00.
1832# http://www.impo.com.uy/diariooficial/1970/04/29/4
1833Rule	Uruguay	1970	only	-	Apr	25	 0:00	1:00	-
1834Rule	Uruguay	1970	only	-	Jun	14	 0:00	0	-
1835Rule	Uruguay	1972	only	-	Apr	23	 0:00	1:00	-
1836Rule	Uruguay	1972	only	-	Jul	16	 0:00	0	-
1837# From Tim Parenti (2018-02-15):
1838# Decreto 29/974 of 1974-01-11, citing "the international rise in the price of
1839# oil", advanced clocks by 90 minutes (to UT-01:30).  Decreto 163/974 of
1840# 1974-03-04 returned 60 of those minutes (to UT-02:30), and the remaining 30
1841# minutes followed in Decreto 679/974 of 1974-08-29.
1842# http://www.impo.com.uy/diariooficial/1974/01/22/11
1843# http://www.impo.com.uy/diariooficial/1974/03/14/3
1844# http://www.impo.com.uy/diariooficial/1974/09/04/6
1845Rule	Uruguay	1974	only	-	Jan	13	 0:00	1:30	-
1846Rule	Uruguay	1974	only	-	Mar	10	 0:00	0:30	-
1847Rule	Uruguay	1974	only	-	Sep	 1	 0:00	0	-
1848Rule	Uruguay	1974	only	-	Dec	22	 0:00	1:00	-
1849Rule	Uruguay	1975	only	-	Mar	30	 0:00	0	-
1850Rule	Uruguay	1976	only	-	Dec	19	 0:00	1:00	-
1851Rule	Uruguay	1977	only	-	Mar	 6	 0:00	0	-
1852Rule	Uruguay	1977	only	-	Dec	 4	 0:00	1:00	-
1853Rule	Uruguay	1978	1979	-	Mar	Sun>=1	 0:00	0	-
1854Rule	Uruguay	1978	only	-	Dec	17	 0:00	1:00	-
1855Rule	Uruguay	1979	only	-	Apr	29	 0:00	1:00	-
1856Rule	Uruguay	1980	only	-	Mar	16	 0:00	0	-
1857# From Tim Parenti (2018-02-15):
1858# Decreto 725/987 of 1987-12-04 cited "better use of national tourist
1859# attractions" to advance clocks one hour from Monday 1987-12-14 00:00.
1860# http://www.impo.com.uy/diariooficial/1988/01/25/1
1861Rule	Uruguay	1987	only	-	Dec	14	 0:00	1:00	-
1862Rule	Uruguay	1988	only	-	Feb	28	 0:00	0	-
1863Rule	Uruguay	1988	only	-	Dec	11	 0:00	1:00	-
1864Rule	Uruguay	1989	only	-	Mar	 5	 0:00	0	-
1865Rule	Uruguay	1989	only	-	Oct	29	 0:00	1:00	-
1866Rule	Uruguay	1990	only	-	Feb	25	 0:00	0	-
1867# From Tim Parenti (2018-02-15), per Paul Eggert (1999-11-04):
1868# IATA agrees as below for 1990-10 through 1993-02.  Per Almanaque 2018, the
1869# 1992/1993 season appears to be the first in over half a century where DST
1870# both began and ended pursuant to the same decree.
1871Rule	Uruguay	1990	1991	-	Oct	Sun>=21	 0:00	1:00	-
1872Rule	Uruguay	1991	1992	-	Mar	Sun>=1	 0:00	0	-
1873Rule	Uruguay	1992	only	-	Oct	18	 0:00	1:00	-
1874Rule	Uruguay	1993	only	-	Feb	28	 0:00	0	-
1875# From Eduardo Cota (2004-09-20):
1876# The Uruguayan government has decreed a change in the local time....
1877# From Tim Parenti (2018-02-15):
1878# Decreto 328/004 of 2004-09-15.
1879# http://www.impo.com.uy/diariooficial/2004/09/23/documentos.pdf#page=1
1880Rule	Uruguay	2004	only	-	Sep	19	 0:00	1:00	-
1881# From Steffen Thorsen (2005-03-11):
1882# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1883# save energy ... it was postponed two weeks....
1884# From Tim Parenti (2018-02-15):
1885# This 2005 postponement is not in Almanaque 2018.  Go with the contemporaneous
1886# reporting, which is confirmed by Decreto 107/005 of 2005-03-10 amending
1887# Decreto 328/004:
1888# http://www.impo.com.uy/diariooficial/2005/03/15/documentos.pdf#page=1
1889# The original decree specified a transition of 2005-03-12 24:00, but the new
1890# one specified 2005-03-27 02:00.
1891Rule	Uruguay	2005	only	-	Mar	27	 2:00	0	-
1892# From Eduardo Cota (2005-09-27):
1893# ...from 2005-10-09 at 02:00 local time, until 2006-03-12 at 02:00 local time,
1894# official time in Uruguay will be at GMT -2.
1895# From Tim Parenti (2018-02-15):
1896# Decreto 318/005 of 2005-09-19.
1897# http://www.impo.com.uy/diariooficial/2005/09/23/documentos.pdf#page=1
1898Rule	Uruguay	2005	only	-	Oct	 9	 2:00	1:00	-
1899Rule	Uruguay	2006	2015	-	Mar	Sun>=8	 2:00	0	-
1900# From Tim Parenti (2018-02-15), per Jesper Nørgaard Welen (2006-09-06):
1901# Decreto 311/006 of 2006-09-04 established regular DST from the first Sunday
1902# of October at 02:00 through the second Sunday of March at 02:00.  Almanaque
1903# 2018 appears to have a few typoed dates through this period; ignore them.
1904# http://www.impo.com.uy/diariooficial/2006/09/08/documentos.pdf#page=1
1905Rule	Uruguay	2006	2014	-	Oct	Sun>=1	 2:00	1:00	-
1906# From Steffen Thorsen (2015-06-30):
1907# ... it looks like they will not be using DST the coming summer:
1908# http://www.elobservador.com.uy/gobierno-resolvio-que-no-habra-cambio-horario-verano-n656787
1909# http://www.republica.com.uy/este-ano-no-se-modificara-el-huso-horario-en-uruguay/523760/
1910# From Paul Eggert (2015-06-30):
1911# Apparently restaurateurs complained that DST caused people to go to the beach
1912# instead of out to dinner.
1913# From Pablo Camargo (2015-07-13):
1914# http://archivo.presidencia.gub.uy/sci/decretos/2015/06/cons_min_201.pdf
1915# From Tim Parenti (2018-02-15):
1916# Decreto 178/015 of 2015-06-29; repeals Decreto 311/006.
1917
1918# This Zone can be simplified once we assume zic %z.
1919Zone America/Montevideo	-3:44:51 -	LMT	1908 Jun 10
1920			-3:44:51 -	MMT	1920 May  1 # Montevideo MT
1921			-4:00	-	-04	1923 Oct  1
1922			-3:30	Uruguay	-0330/-03 1942 Dec 14
1923			-3:00	Uruguay	-03/-0230 1960
1924			-3:00	Uruguay	-03/-02	1968
1925			-3:00	Uruguay	-03/-0230 1970
1926			-3:00	Uruguay	-03/-02	1974
1927			-3:00	Uruguay	-03/-0130 1974 Mar 10
1928			-3:00	Uruguay	-03/-0230 1974 Dec 22
1929			-3:00	Uruguay	-03/-02
1930
1931# Venezuela
1932#
1933# From Paul Eggert (2015-07-28):
1934# For the 1965 transition see Gaceta Oficial No. 27.619 (1964-12-15), p 205.533
1935# http://www.pgr.gob.ve/dmdocuments/1964/27619.pdf
1936#
1937# From John Stainforth (2007-11-28):
1938# ... the change for Venezuela originally expected for 2007-12-31 has
1939# been brought forward to 2007-12-09.  The official announcement was
1940# published today in the "Gaceta Oficial de la República Bolivariana
1941# de Venezuela, número 38.819" (official document for all laws or
1942# resolution publication)
1943# http://www.globovision.com/news.php?nid=72208
1944
1945# From Alexander Krivenyshev (2016-04-15):
1946# https://actualidad.rt.com/actualidad/204758-venezuela-modificar-huso-horario-sequia-elnino
1947#
1948# From Paul Eggert (2016-04-15):
1949# Clocks advance 30 minutes on 2016-05-01 at 02:30....
1950# "'Venezuela's new time-zone: hours without light, hours without water,
1951# hours of presidential broadcasts, hours of lines,' quipped comedian
1952# Jean Mary Curró ...". See: Cawthorne A, Kai D. Venezuela scraps
1953# half-hour time difference set by Chavez. Reuters 2016-04-15 14:50 -0400
1954# https://www.reuters.com/article/us-venezuela-timezone-idUSKCN0XC2BE
1955#
1956# From Matt Johnson (2016-04-20):
1957# ... published in the official Gazette [2016-04-18], here:
1958# http://historico.tsj.gob.ve/gaceta_ext/abril/1842016/E-1842016-4551.pdf
1959
1960# Zone	NAME		GMTOFF	RULES	FORMAT	[UNTIL]
1961Zone	America/Caracas	-4:27:44 -	LMT	1890
1962			-4:27:40 -	CMT	1912 Feb 12 # Caracas Mean Time?
1963			-4:30	-	-0430	1965 Jan  1  0:00
1964			-4:00	-	-04	2007 Dec  9  3:00
1965			-4:30	-	-0430	2016 May  1  2:30
1966			-4:00	-	-04
1967