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1# @(#)southamerica 8.30
1# @(#)southamerica 8.33
2# <pre>
3
4# This data is by no means authoritative; if you think you know better,
5# go ahead and edit the file (and please send any changes to
6# tz@elsie.nci.nih.gov for general use in the future).
7
8# From Paul Eggert (2006-03-22):
9# A good source for time zone historical data outside the U.S. is
10# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
11# San Diego: ACS Publications, Inc. (2003).
12#
13# Gwillim Law writes that a good source
14# for recent time zone data is the International Air Transport
15# Association's Standard Schedules Information Manual (IATA SSIM),
16# published semiannually. Law sent in several helpful summaries
17# of the IATA's data after 1990.
18#
19# Except where otherwise noted, Shanks & Pottenger is the source for
20# entries through 1990, and IATA SSIM is the source for entries afterwards.
21#
22# Earlier editions of these tables used the North American style (e.g. ARST and
23# ARDT for Argentine Standard and Daylight Time), but the following quote
24# suggests that it's better to use European style (e.g. ART and ARST).
25# I suggest the use of _Summer time_ instead of the more cumbersome
26# _daylight-saving time_. _Summer time_ seems to be in general use
27# in Europe and South America.
28# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
29# H L Mencken, _The American Language: Supplement I_ (1960), p 466
30#
31# Earlier editions of these tables also used the North American style
32# for time zones in Brazil, but this was incorrect, as Brazilians say
33# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
34# the railroad sector, writes (1999-07-06):
35# The subject of time zones is currently a matter of discussion/debate in
36# Brazil. Let's say that "the Brasilia time" is considered the
37# "official time" because Brasilia is the capital city.
38# The other three time zones are called "Brasilia time "minus one" or
39# "plus one" or "plus two". As far as I know there is no such
40# name/designation as "Eastern Time" or "Central Time".
41# So I invented the following (English-language) abbreviations for now.
42# Corrections are welcome!
43# std dst
44# -2:00 FNT FNST Fernando de Noronha
45# -3:00 BRT BRST Brasilia
46# -4:00 AMT AMST Amazon
47# -5:00 ACT ACST Acre
48
49###############################################################################
50
51###############################################################################
52
53# Argentina
54
55# From Bob Devine (1988-01-28):
56# Argentina: first Sunday in October to first Sunday in April since 1976.
57# Double Summer time from 1969 to 1974. Switches at midnight.
58
59# From U. S. Naval Observatory (1988-01-199):
60# ARGENTINA 3 H BEHIND UTC
61
62# From Hernan G. Otero (1995-06-26):
63# I am sending modifications to the Argentine time zone table...
64# AR was chosen because they are the ISO letters that represent Argentina.
65
66# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
67Rule Arg 1930 only - Dec 1 0:00 1:00 S
68Rule Arg 1931 only - Apr 1 0:00 0 -
69Rule Arg 1931 only - Oct 15 0:00 1:00 S
70Rule Arg 1932 1940 - Mar 1 0:00 0 -
71Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
72Rule Arg 1940 only - Jul 1 0:00 1:00 S
73Rule Arg 1941 only - Jun 15 0:00 0 -
74Rule Arg 1941 only - Oct 15 0:00 1:00 S
75Rule Arg 1943 only - Aug 1 0:00 0 -
76Rule Arg 1943 only - Oct 15 0:00 1:00 S
77Rule Arg 1946 only - Mar 1 0:00 0 -
78Rule Arg 1946 only - Oct 1 0:00 1:00 S
79Rule Arg 1963 only - Oct 1 0:00 0 -
80Rule Arg 1963 only - Dec 15 0:00 1:00 S
81Rule Arg 1964 1966 - Mar 1 0:00 0 -
82Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
83Rule Arg 1967 only - Apr 2 0:00 0 -
84Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
85Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
86Rule Arg 1974 only - Jan 23 0:00 1:00 S
87Rule Arg 1974 only - May 1 0:00 0 -
88Rule Arg 1988 only - Dec 1 0:00 1:00 S
89#
90# From Hernan G. Otero (1995-06-26):
91# These corrections were contributed by InterSoft Argentina S.A.,
92# obtaining the data from the:
93# Talleres de Hidrografia Naval Argentina
94# (Argentine Naval Hydrography Institute)
95Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
96Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
97#
98# From Hernan G. Otero (1995-06-26):
99# From this moment on, the law that mandated the daylight saving
100# time corrections was derogated and no more modifications
101# to the time zones (for daylight saving) are now made.
102#
103# From Rives McDow (2000-01-10):
104# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
105# which did not result in the switch of a time zone, as they stayed 9 hours
106# from the International Date Line.
107Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
108# From Paul Eggert (2007-12-28):
109# DST was set to expire on March 5, not March 3, but since it was converted
110# to standard time on March 3 it's more convenient for us to pretend that
111# it ended on March 3.
112Rule Arg 2000 only - Mar 3 0:00 0 -
113#
114# From Peter Gradelski via Steffen Thorsen (2000-03-01):
115# We just checked with our Sao Paulo office and they say the government of
116# Argentina decided not to become one of the countries that go on or off DST.
117# So Buenos Aires should be -3 hours from GMT at all times.
118#
119# From Fabian L. Arce Jofre (2000-04-04):
120# The law that claimed DST for Argentina was derogated by President Fernando
121# de la Rua on March 2, 2000, because it would make people spend more energy
122# in the winter time, rather than less. The change took effect on March 3.
123#
124# From Mariano Absatz (2001-06-06):
125# one of the major newspapers here in Argentina said that the 1999
126# Timezone Law (which never was effectively applied) will (would?) be
127# in effect.... The article is at
128# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
129# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
130# 1999-09-17, and published 1999-09-21. The official publication is at:
131# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
132# Regretfully, you have to subscribe (and pay) for the on-line version....
133#
134# (2001-06-12):
135# the timezone for Argentina will not change next Sunday.
136# Apparently it will do so on Sunday 24th....
137# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
138#
139# (2001-06-25):
140# Last Friday (yes, the last working day before the date of the change), the
141# Senate annulled the 1999 law that introduced the changes later postponed.
142# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
143# It remains the vote of the Deputies..., but it will be the same....
144# This kind of things had always been done this way in Argentina.
145# We are still -03:00 all year round in all of the country.
146#
147# From Steffen Thorsen (2007-12-21):
148# A user (Leonardo Chaim) reported that Argentina will adopt DST....
149# all of the country (all Zone-entries) are affected. News reports like
150# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
151# that Argentina will use DST next year as well, from October to
152# March, although exact rules are not given.
153#
154# From Jesper Norgaard Welen (2007-12-26)
155# The last hurdle of Argentina DST is over, the proposal was approved in
156# the lower chamber too (Deputados) with a vote 192 for and 2 against.
157# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
158# the original scanned proposal, where the dates and the zero hours are
159# clear and unambiguous...This is the article about final approval:
160# <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
161# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
162# </a>
163#
164# From Paul Eggert (2007-12-22):
165# For dates after mid-2008, the following rules are my guesses and
166# are quite possibly wrong, but are more likely than no DST at all.
167
168# From Alexander Krivenyshev (2008-09-05):
169# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
170# Argentina will start DST on Sunday October 19, 2008.
171#
172# <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html">
173# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
174# </a>
175# OR
176# <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)">
177# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
178# </a>
179
180# From Rodrigo Severo (2008-10-06):
181# Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
182# ...
183# ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
184# Hi, there is a problem with timezone-data-2008e and maybe with
185# timezone-data-2008f
186# Argentinian law [Number] 25.155 is no longer valid.
187# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm">
188# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
189# </a>
190# The new one is law [Number] 26.350
191# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm">
192# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
193# </a>
194# So there is no summer time in Argentina for now.
195
2# <pre>
3
4# This data is by no means authoritative; if you think you know better,
5# go ahead and edit the file (and please send any changes to
6# tz@elsie.nci.nih.gov for general use in the future).
7
8# From Paul Eggert (2006-03-22):
9# A good source for time zone historical data outside the U.S. is
10# Thomas G. Shanks and Rique Pottenger, The International Atlas (6th edition),
11# San Diego: ACS Publications, Inc. (2003).
12#
13# Gwillim Law writes that a good source
14# for recent time zone data is the International Air Transport
15# Association's Standard Schedules Information Manual (IATA SSIM),
16# published semiannually. Law sent in several helpful summaries
17# of the IATA's data after 1990.
18#
19# Except where otherwise noted, Shanks & Pottenger is the source for
20# entries through 1990, and IATA SSIM is the source for entries afterwards.
21#
22# Earlier editions of these tables used the North American style (e.g. ARST and
23# ARDT for Argentine Standard and Daylight Time), but the following quote
24# suggests that it's better to use European style (e.g. ART and ARST).
25# I suggest the use of _Summer time_ instead of the more cumbersome
26# _daylight-saving time_. _Summer time_ seems to be in general use
27# in Europe and South America.
28# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
29# H L Mencken, _The American Language: Supplement I_ (1960), p 466
30#
31# Earlier editions of these tables also used the North American style
32# for time zones in Brazil, but this was incorrect, as Brazilians say
33# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
34# the railroad sector, writes (1999-07-06):
35# The subject of time zones is currently a matter of discussion/debate in
36# Brazil. Let's say that "the Brasilia time" is considered the
37# "official time" because Brasilia is the capital city.
38# The other three time zones are called "Brasilia time "minus one" or
39# "plus one" or "plus two". As far as I know there is no such
40# name/designation as "Eastern Time" or "Central Time".
41# So I invented the following (English-language) abbreviations for now.
42# Corrections are welcome!
43# std dst
44# -2:00 FNT FNST Fernando de Noronha
45# -3:00 BRT BRST Brasilia
46# -4:00 AMT AMST Amazon
47# -5:00 ACT ACST Acre
48
49###############################################################################
50
51###############################################################################
52
53# Argentina
54
55# From Bob Devine (1988-01-28):
56# Argentina: first Sunday in October to first Sunday in April since 1976.
57# Double Summer time from 1969 to 1974. Switches at midnight.
58
59# From U. S. Naval Observatory (1988-01-199):
60# ARGENTINA 3 H BEHIND UTC
61
62# From Hernan G. Otero (1995-06-26):
63# I am sending modifications to the Argentine time zone table...
64# AR was chosen because they are the ISO letters that represent Argentina.
65
66# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
67Rule Arg 1930 only - Dec 1 0:00 1:00 S
68Rule Arg 1931 only - Apr 1 0:00 0 -
69Rule Arg 1931 only - Oct 15 0:00 1:00 S
70Rule Arg 1932 1940 - Mar 1 0:00 0 -
71Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
72Rule Arg 1940 only - Jul 1 0:00 1:00 S
73Rule Arg 1941 only - Jun 15 0:00 0 -
74Rule Arg 1941 only - Oct 15 0:00 1:00 S
75Rule Arg 1943 only - Aug 1 0:00 0 -
76Rule Arg 1943 only - Oct 15 0:00 1:00 S
77Rule Arg 1946 only - Mar 1 0:00 0 -
78Rule Arg 1946 only - Oct 1 0:00 1:00 S
79Rule Arg 1963 only - Oct 1 0:00 0 -
80Rule Arg 1963 only - Dec 15 0:00 1:00 S
81Rule Arg 1964 1966 - Mar 1 0:00 0 -
82Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
83Rule Arg 1967 only - Apr 2 0:00 0 -
84Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
85Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
86Rule Arg 1974 only - Jan 23 0:00 1:00 S
87Rule Arg 1974 only - May 1 0:00 0 -
88Rule Arg 1988 only - Dec 1 0:00 1:00 S
89#
90# From Hernan G. Otero (1995-06-26):
91# These corrections were contributed by InterSoft Argentina S.A.,
92# obtaining the data from the:
93# Talleres de Hidrografia Naval Argentina
94# (Argentine Naval Hydrography Institute)
95Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
96Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
97#
98# From Hernan G. Otero (1995-06-26):
99# From this moment on, the law that mandated the daylight saving
100# time corrections was derogated and no more modifications
101# to the time zones (for daylight saving) are now made.
102#
103# From Rives McDow (2000-01-10):
104# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
105# which did not result in the switch of a time zone, as they stayed 9 hours
106# from the International Date Line.
107Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
108# From Paul Eggert (2007-12-28):
109# DST was set to expire on March 5, not March 3, but since it was converted
110# to standard time on March 3 it's more convenient for us to pretend that
111# it ended on March 3.
112Rule Arg 2000 only - Mar 3 0:00 0 -
113#
114# From Peter Gradelski via Steffen Thorsen (2000-03-01):
115# We just checked with our Sao Paulo office and they say the government of
116# Argentina decided not to become one of the countries that go on or off DST.
117# So Buenos Aires should be -3 hours from GMT at all times.
118#
119# From Fabian L. Arce Jofre (2000-04-04):
120# The law that claimed DST for Argentina was derogated by President Fernando
121# de la Rua on March 2, 2000, because it would make people spend more energy
122# in the winter time, rather than less. The change took effect on March 3.
123#
124# From Mariano Absatz (2001-06-06):
125# one of the major newspapers here in Argentina said that the 1999
126# Timezone Law (which never was effectively applied) will (would?) be
127# in effect.... The article is at
128# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
129# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
130# 1999-09-17, and published 1999-09-21. The official publication is at:
131# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
132# Regretfully, you have to subscribe (and pay) for the on-line version....
133#
134# (2001-06-12):
135# the timezone for Argentina will not change next Sunday.
136# Apparently it will do so on Sunday 24th....
137# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
138#
139# (2001-06-25):
140# Last Friday (yes, the last working day before the date of the change), the
141# Senate annulled the 1999 law that introduced the changes later postponed.
142# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
143# It remains the vote of the Deputies..., but it will be the same....
144# This kind of things had always been done this way in Argentina.
145# We are still -03:00 all year round in all of the country.
146#
147# From Steffen Thorsen (2007-12-21):
148# A user (Leonardo Chaim) reported that Argentina will adopt DST....
149# all of the country (all Zone-entries) are affected. News reports like
150# http://www.lanacion.com.ar/opinion/nota.asp?nota_id=973037 indicate
151# that Argentina will use DST next year as well, from October to
152# March, although exact rules are not given.
153#
154# From Jesper Norgaard Welen (2007-12-26)
155# The last hurdle of Argentina DST is over, the proposal was approved in
156# the lower chamber too (Deputados) with a vote 192 for and 2 against.
157# By the way thanks to Mariano Absatz and Daniel Mario Vega for the link to
158# the original scanned proposal, where the dates and the zero hours are
159# clear and unambiguous...This is the article about final approval:
160# <a href="http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996">
161# http://www.lanacion.com.ar/politica/nota.asp?nota_id=973996
162# </a>
163#
164# From Paul Eggert (2007-12-22):
165# For dates after mid-2008, the following rules are my guesses and
166# are quite possibly wrong, but are more likely than no DST at all.
167
168# From Alexander Krivenyshev (2008-09-05):
169# As per message from Carlos Alberto Fonseca Arauz (Nicaragua),
170# Argentina will start DST on Sunday October 19, 2008.
171#
172# <a href="http://www.worldtimezone.com/dst_news/dst_news_argentina03.html">
173# http://www.worldtimezone.com/dst_news/dst_news_argentina03.html
174# </a>
175# OR
176# <a href="http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)">
177# http://www.impulsobaires.com.ar/nota.php?id=57832 (in spanish)
178# </a>
179
180# From Rodrigo Severo (2008-10-06):
181# Here is some info available at a Gentoo bug related to TZ on Argentina's DST:
182# ...
183# ------- Comment #1 from [jmdocile] 2008-10-06 16:28 0000 -------
184# Hi, there is a problem with timezone-data-2008e and maybe with
185# timezone-data-2008f
186# Argentinian law [Number] 25.155 is no longer valid.
187# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm">
188# http://www.infoleg.gov.ar/infolegInternet/anexos/60000-64999/60036/norma.htm
189# </a>
190# The new one is law [Number] 26.350
191# <a href="http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm">
192# http://www.infoleg.gov.ar/infolegInternet/anexos/135000-139999/136191/norma.htm
193# </a>
194# So there is no summer time in Argentina for now.
195
196# From Mariano Absatz (2008-10-20):
197# Decree 1693/2008 applies Law 26.350 for the summer 2008/2009 establishing DST in Argentina
198# From 2008-10-19 until 2009-03-15
199# <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01">
200# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=16102008&pi=3&pf=4&s=0&sec=01
201# </a>
202#
203# Decree 1705/2008 excepting 12 Provinces from applying DST in the summer 2008/2009:
204# Catamarca, La Rioja, Mendoza, Salta, San Juan, San Luis, La Pampa, Neuquen, Rio Negro, Chubut, Santa Cruz
205# and Tierra del Fuego
206# <a href="http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01">
207# http://www.boletinoficial.gov.ar/Bora.Portal/CustomControls/PdfContent.aspx?fp=17102008&pi=1&pf=1&s=0&sec=01
208# </a>
209#
210# Press release 235 dated Saturday October 18th, from the Government of the Province of Jujuy saying
211# it will not apply DST either (even when it was not included in Decree 1705/2008)
212# <a href="http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc">
213# http://www.jujuy.gov.ar/index2/partes_prensa/18_10_08/235-181008.doc
214# </a>
215
196Rule Arg 2007 only - Dec 30 0:00 1:00 S
197Rule Arg 2008 max - Mar Sun>=15 0:00 0 -
198Rule Arg 2008 max - Oct Sun>=15 0:00 1:00 S
199
200# From Mariano Absatz (2004-05-21):
201# Today it was officially published that the Province of Mendoza is changing
202# its timezone this winter... starting tomorrow night....
203# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
204# From Paul Eggert (2004-05-24):
205# It's Law No. 7,210. This change is due to a public power emergency, so for
206# now we'll assume it's for this year only.
207#
208# From Paul Eggert (2006-03-22):
209# <a href="http://www.spicasc.net/horvera.html">
210# Hora de verano para la Republica Argentina (2003-06-08)
211# </a> says that standard time in Argentina from 1894-10-31
212# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
213# over Shanks & Pottenger.
214#
215# From Mariano Absatz (2004-06-05):
216# These media articles from a major newspaper mostly cover the current state:
217# http://www.lanacion.com.ar/04/05/27/de_604825.asp
218# http://www.lanacion.com.ar/04/05/28/de_605203.asp
219#
220# The following eight (8) provinces pulled clocks back to UTC-04:00 at
221# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
222# Apparently, all nine provinces would go back to UTC-03:00 at the same
223# time in October 17th.
224#
225# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
226# Tierra del Fuego, Tucuman.
227#
228# From Mariano Absatz (2004-06-14):
229# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
230# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
231# annoyance with the change is much higher than the power savings obtained....
232#
233# From Gwillim Law (2004-06-14):
234# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
235# "The time change in Tierra del Fuego was a conflicted decision from
236# the start. The government had decreed that the measure would take
237# effect on June 1, but a normative error forced the new time to begin
238# three days earlier, from a Saturday to a Sunday....
239# Our understanding was that the change was originally scheduled to take place
240# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
241# provinces). Sunday was May 30, only two days earlier. So the article
242# contains a contradiction. I would give more credence to the Saturday/Sunday
243# date than the "three days earlier" phrase, and conclude that Tierra del
244# Fuego set its clocks back at 2004-05-30 00:00.
245#
246# From Steffen Thorsen (2004-10-05):
247# The previous law 7210 which changed the province of Mendoza's time zone
248# back in May have been modified slightly in a new law 7277, which set the
249# new end date to 2004-09-26 (original date was 2004-10-17).
250# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
251#
252# From Mariano Absatz (2004-10-05):
253# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
254# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
255# at midnight between Saturday, July 24th and Sunday, July 25th....
256# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
257# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
258# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
259
260# From Alex Krivenyshev (2008-01-17):
261# Here are articles that Argentina Province San Luis is planning to end DST
262# as earlier as upcoming Monday January 21, 2008 or February 2008:
263#
264# Provincia argentina retrasa reloj y marca diferencia con resto del pais
265# (Argentine Province delayed clock and mark difference with the rest of the
266# country)
267# <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
268# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
269# </a>
270#
271# Es inminente que en San Luis atrasen una hora los relojes
272# (It is imminent in San Luis clocks one hour delay)
273# <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
274# http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
275# </a>
276#
277# <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
278# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
279# </a>
280
281# From Jesper Norgaard Welen (2008-01-18):
282# The page of the San Luis provincial government
283# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
284# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
285# </a>
286# confirms what Alex Krivenyshev has earlier sent to the tz
287# emailing list about that San Luis plans to return to standard
288# time much earlier than the rest of the country. It also
289# confirms that upon request the provinces San Juan and Mendoza
290# refused to follow San Luis in this change.
291#
292# The change is supposed to take place Monday the 21.st at 0:00
293# hours. As far as I understand it if this goes ahead, we need
294# a new timezone for San Luis (although there are also documented
295# independent changes in the southamerica file of San Luis in
296# 1990 and 1991 which has not been confirmed).
297
298# From Jesper Norgaard Welen (2008-01-25):
299# Unfortunately the below page has become defunct, about the San Luis
300# time change. Perhaps because it now is part of a group of pages "Most
301# important pages of 2008."
302#
303# You can use
304# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
305# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
306# </a>
307# instead it seems. Or use "Buscador" from the main page of the San Luis
308# government, and fill in "huso" and click OK, and you will get 3 pages
309# from which the first one is identical to the above.
310
311# From Mariano Absatz (2008-01-28):
312# I can confirm that the Province of San Luis (and so far only that
313# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
314# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
315# 1 hour), and they intend to keep UTC-3 as their timezone all year round
316# (that is, unless they change their mind any minute now).
317#
318# So we'll have to add yet another city to 'southamerica' (I think San
319# Luis city is the mos populated city in the Province, so it'd be
320# America/Argentina/San_Luis... of course I can't remember if San Luis's
321# history of particular changes goes along with Mendoza or San Juan :-(
322# (I only remember not being able to collect hard facts about San Luis
323# back in 2004, when these provinces changed to UTC-4 for a few days, I
324# mailed them personally and never got an answer).
325
326# From Paul Eggert (2008-06-30):
327# Unless otherwise specified, data are from Shanks & Pottenger through 1992,
328# from the IATA otherwise. As noted below, Shanks & Pottenger say that
329# America/Cordoba split into 6 subregions during 1991/1992, one of which
330# was America/San_Luis, but we haven't verified this yet so for now we'll
331# keep America/Cordoba a single region rather than splitting it into the
332# other 5 subregions.
333
334#
335# Zone NAME GMTOFF RULES FORMAT [UNTIL]
336#
337# Buenos Aires (BA), Capital Federal (CF),
338Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
339 -4:16:48 - CMT 1920 May # Cordoba Mean Time
340 -4:00 - ART 1930 Dec
341 -4:00 Arg AR%sT 1969 Oct 5
342 -3:00 Arg AR%sT 1999 Oct 3
343 -4:00 Arg AR%sT 2000 Mar 3
344 -3:00 Arg AR%sT
345#
216Rule Arg 2007 only - Dec 30 0:00 1:00 S
217Rule Arg 2008 max - Mar Sun>=15 0:00 0 -
218Rule Arg 2008 max - Oct Sun>=15 0:00 1:00 S
219
220# From Mariano Absatz (2004-05-21):
221# Today it was officially published that the Province of Mendoza is changing
222# its timezone this winter... starting tomorrow night....
223# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
224# From Paul Eggert (2004-05-24):
225# It's Law No. 7,210. This change is due to a public power emergency, so for
226# now we'll assume it's for this year only.
227#
228# From Paul Eggert (2006-03-22):
229# <a href="http://www.spicasc.net/horvera.html">
230# Hora de verano para la Republica Argentina (2003-06-08)
231# </a> says that standard time in Argentina from 1894-10-31
232# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
233# over Shanks & Pottenger.
234#
235# From Mariano Absatz (2004-06-05):
236# These media articles from a major newspaper mostly cover the current state:
237# http://www.lanacion.com.ar/04/05/27/de_604825.asp
238# http://www.lanacion.com.ar/04/05/28/de_605203.asp
239#
240# The following eight (8) provinces pulled clocks back to UTC-04:00 at
241# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
242# Apparently, all nine provinces would go back to UTC-03:00 at the same
243# time in October 17th.
244#
245# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
246# Tierra del Fuego, Tucuman.
247#
248# From Mariano Absatz (2004-06-14):
249# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
250# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
251# annoyance with the change is much higher than the power savings obtained....
252#
253# From Gwillim Law (2004-06-14):
254# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
255# "The time change in Tierra del Fuego was a conflicted decision from
256# the start. The government had decreed that the measure would take
257# effect on June 1, but a normative error forced the new time to begin
258# three days earlier, from a Saturday to a Sunday....
259# Our understanding was that the change was originally scheduled to take place
260# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
261# provinces). Sunday was May 30, only two days earlier. So the article
262# contains a contradiction. I would give more credence to the Saturday/Sunday
263# date than the "three days earlier" phrase, and conclude that Tierra del
264# Fuego set its clocks back at 2004-05-30 00:00.
265#
266# From Steffen Thorsen (2004-10-05):
267# The previous law 7210 which changed the province of Mendoza's time zone
268# back in May have been modified slightly in a new law 7277, which set the
269# new end date to 2004-09-26 (original date was 2004-10-17).
270# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
271#
272# From Mariano Absatz (2004-10-05):
273# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
274# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
275# at midnight between Saturday, July 24th and Sunday, July 25th....
276# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
277# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
278# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
279
280# From Alex Krivenyshev (2008-01-17):
281# Here are articles that Argentina Province San Luis is planning to end DST
282# as earlier as upcoming Monday January 21, 2008 or February 2008:
283#
284# Provincia argentina retrasa reloj y marca diferencia con resto del pais
285# (Argentine Province delayed clock and mark difference with the rest of the
286# country)
287# <a href="http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel">
288# http://cl.invertia.com/noticias/noticia.aspx?idNoticia=200801171849_EFE_ET4373&idtel
289# </a>
290#
291# Es inminente que en San Luis atrasen una hora los relojes
292# (It is imminent in San Luis clocks one hour delay)
293# <a href="http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414">
294# http://www.lagaceta.com.ar/vernotae.asp?id_nota=253414
295# </a>
296#
297# <a href="http://www.worldtimezone.net/dst_news/dst_news_argentina02.html">
298# http://www.worldtimezone.net/dst_news/dst_news_argentina02.html
299# </a>
300
301# From Jesper Norgaard Welen (2008-01-18):
302# The page of the San Luis provincial government
303# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812">
304# http://www.sanluis.gov.ar/notas.asp?idCanal=0&id=22812
305# </a>
306# confirms what Alex Krivenyshev has earlier sent to the tz
307# emailing list about that San Luis plans to return to standard
308# time much earlier than the rest of the country. It also
309# confirms that upon request the provinces San Juan and Mendoza
310# refused to follow San Luis in this change.
311#
312# The change is supposed to take place Monday the 21.st at 0:00
313# hours. As far as I understand it if this goes ahead, we need
314# a new timezone for San Luis (although there are also documented
315# independent changes in the southamerica file of San Luis in
316# 1990 and 1991 which has not been confirmed).
317
318# From Jesper Norgaard Welen (2008-01-25):
319# Unfortunately the below page has become defunct, about the San Luis
320# time change. Perhaps because it now is part of a group of pages "Most
321# important pages of 2008."
322#
323# You can use
324# <a href="http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834">
325# http://www.sanluis.gov.ar/notas.asp?idCanal=8141&id=22834
326# </a>
327# instead it seems. Or use "Buscador" from the main page of the San Luis
328# government, and fill in "huso" and click OK, and you will get 3 pages
329# from which the first one is identical to the above.
330
331# From Mariano Absatz (2008-01-28):
332# I can confirm that the Province of San Luis (and so far only that
333# province) decided to go back to UTC-3 effective midnight Jan 20th 2008
334# (that is, Monday 21st at 0:00 is the time the clocks were delayed back
335# 1 hour), and they intend to keep UTC-3 as their timezone all year round
336# (that is, unless they change their mind any minute now).
337#
338# So we'll have to add yet another city to 'southamerica' (I think San
339# Luis city is the mos populated city in the Province, so it'd be
340# America/Argentina/San_Luis... of course I can't remember if San Luis's
341# history of particular changes goes along with Mendoza or San Juan :-(
342# (I only remember not being able to collect hard facts about San Luis
343# back in 2004, when these provinces changed to UTC-4 for a few days, I
344# mailed them personally and never got an answer).
345
346# From Paul Eggert (2008-06-30):
347# Unless otherwise specified, data are from Shanks & Pottenger through 1992,
348# from the IATA otherwise. As noted below, Shanks & Pottenger say that
349# America/Cordoba split into 6 subregions during 1991/1992, one of which
350# was America/San_Luis, but we haven't verified this yet so for now we'll
351# keep America/Cordoba a single region rather than splitting it into the
352# other 5 subregions.
353
354#
355# Zone NAME GMTOFF RULES FORMAT [UNTIL]
356#
357# Buenos Aires (BA), Capital Federal (CF),
358Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
359 -4:16:48 - CMT 1920 May # Cordoba Mean Time
360 -4:00 - ART 1930 Dec
361 -4:00 Arg AR%sT 1969 Oct 5
362 -3:00 Arg AR%sT 1999 Oct 3
363 -4:00 Arg AR%sT 2000 Mar 3
364 -3:00 Arg AR%sT
365#
346# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
347# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB),
348# La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
366# Cordoba (CB), Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN),
367# Chaco (CC), Formosa (FM), Santiago del Estero (SE)
349#
350# Shanks & Pottenger also make the following claims, which we haven't verified:
351# - Formosa switched to -3:00 on 1991-01-07.
352# - Misiones switched to -3:00 on 1990-12-29.
353# - Chaco switched to -3:00 on 1991-01-04.
354# - Santiago del Estero switched to -4:00 on 1991-04-01,
355# then to -3:00 on 1991-04-26.
356#
357Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
358 -4:16:48 - CMT 1920 May
359 -4:00 - ART 1930 Dec
360 -4:00 Arg AR%sT 1969 Oct 5
361 -3:00 Arg AR%sT 1991 Mar 3
362 -4:00 - WART 1991 Oct 20
363 -3:00 Arg AR%sT 1999 Oct 3
364 -4:00 Arg AR%sT 2000 Mar 3
365 -3:00 Arg AR%sT
366#
368#
369# Shanks & Pottenger also make the following claims, which we haven't verified:
370# - Formosa switched to -3:00 on 1991-01-07.
371# - Misiones switched to -3:00 on 1990-12-29.
372# - Chaco switched to -3:00 on 1991-01-04.
373# - Santiago del Estero switched to -4:00 on 1991-04-01,
374# then to -3:00 on 1991-04-26.
375#
376Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
377 -4:16:48 - CMT 1920 May
378 -4:00 - ART 1930 Dec
379 -4:00 Arg AR%sT 1969 Oct 5
380 -3:00 Arg AR%sT 1991 Mar 3
381 -4:00 - WART 1991 Oct 20
382 -3:00 Arg AR%sT 1999 Oct 3
383 -4:00 Arg AR%sT 2000 Mar 3
384 -3:00 Arg AR%sT
385#
386# Salta (SA), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
387Zone America/Argentina/Salta -4:21:40 - LMT 1894 Oct 31
388 -4:16:48 - CMT 1920 May
389 -4:00 - ART 1930 Dec
390 -4:00 Arg AR%sT 1969 Oct 5
391 -3:00 Arg AR%sT 1991 Mar 3
392 -4:00 - WART 1991 Oct 20
393 -3:00 Arg AR%sT 1999 Oct 3
394 -4:00 Arg AR%sT 2000 Mar 3
395 -3:00 Arg AR%sT 2008 Oct 18
396 -3:00 - ART
397#
367# Tucuman (TM)
368Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
369 -4:16:48 - CMT 1920 May
370 -4:00 - ART 1930 Dec
371 -4:00 Arg AR%sT 1969 Oct 5
372 -3:00 Arg AR%sT 1991 Mar 3
373 -4:00 - WART 1991 Oct 20
374 -3:00 Arg AR%sT 1999 Oct 3
375 -4:00 Arg AR%sT 2000 Mar 3
376 -3:00 - ART 2004 Jun 1
377 -4:00 - WART 2004 Jun 13
378 -3:00 Arg AR%sT
379#
380# La Rioja (LR)
381Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
382 -4:16:48 - CMT 1920 May
383 -4:00 - ART 1930 Dec
384 -4:00 Arg AR%sT 1969 Oct 5
385 -3:00 Arg AR%sT 1991 Mar 1
386 -4:00 - WART 1991 May 7
387 -3:00 Arg AR%sT 1999 Oct 3
388 -4:00 Arg AR%sT 2000 Mar 3
389 -3:00 - ART 2004 Jun 1
390 -4:00 - WART 2004 Jun 20
398# Tucuman (TM)
399Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
400 -4:16:48 - CMT 1920 May
401 -4:00 - ART 1930 Dec
402 -4:00 Arg AR%sT 1969 Oct 5
403 -3:00 Arg AR%sT 1991 Mar 3
404 -4:00 - WART 1991 Oct 20
405 -3:00 Arg AR%sT 1999 Oct 3
406 -4:00 Arg AR%sT 2000 Mar 3
407 -3:00 - ART 2004 Jun 1
408 -4:00 - WART 2004 Jun 13
409 -3:00 Arg AR%sT
410#
411# La Rioja (LR)
412Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
413 -4:16:48 - CMT 1920 May
414 -4:00 - ART 1930 Dec
415 -4:00 Arg AR%sT 1969 Oct 5
416 -3:00 Arg AR%sT 1991 Mar 1
417 -4:00 - WART 1991 May 7
418 -3:00 Arg AR%sT 1999 Oct 3
419 -4:00 Arg AR%sT 2000 Mar 3
420 -3:00 - ART 2004 Jun 1
421 -4:00 - WART 2004 Jun 20
391 -3:00 Arg AR%sT
422 -3:00 Arg AR%sT 2008 Oct 18
423 -3:00 - ART
392#
393# San Juan (SJ)
394Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
395 -4:16:48 - CMT 1920 May
396 -4:00 - ART 1930 Dec
397 -4:00 Arg AR%sT 1969 Oct 5
398 -3:00 Arg AR%sT 1991 Mar 1
399 -4:00 - WART 1991 May 7
400 -3:00 Arg AR%sT 1999 Oct 3
401 -4:00 Arg AR%sT 2000 Mar 3
402 -3:00 - ART 2004 May 31
403 -4:00 - WART 2004 Jul 25
424#
425# San Juan (SJ)
426Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
427 -4:16:48 - CMT 1920 May
428 -4:00 - ART 1930 Dec
429 -4:00 Arg AR%sT 1969 Oct 5
430 -3:00 Arg AR%sT 1991 Mar 1
431 -4:00 - WART 1991 May 7
432 -3:00 Arg AR%sT 1999 Oct 3
433 -4:00 Arg AR%sT 2000 Mar 3
434 -3:00 - ART 2004 May 31
435 -4:00 - WART 2004 Jul 25
404 -3:00 Arg AR%sT
436 -3:00 Arg AR%sT 2008 Oct 18
437 -3:00 - ART
405#
406# Jujuy (JY)
407Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
408 -4:16:48 - CMT 1920 May
409 -4:00 - ART 1930 Dec
410 -4:00 Arg AR%sT 1969 Oct 5
411 -3:00 Arg AR%sT 1990 Mar 4
412 -4:00 - WART 1990 Oct 28
413 -4:00 1:00 WARST 1991 Mar 17
414 -4:00 - WART 1991 Oct 6
415 -3:00 1:00 ARST 1992
416 -3:00 Arg AR%sT 1999 Oct 3
417 -4:00 Arg AR%sT 2000 Mar 3
438#
439# Jujuy (JY)
440Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
441 -4:16:48 - CMT 1920 May
442 -4:00 - ART 1930 Dec
443 -4:00 Arg AR%sT 1969 Oct 5
444 -3:00 Arg AR%sT 1990 Mar 4
445 -4:00 - WART 1990 Oct 28
446 -4:00 1:00 WARST 1991 Mar 17
447 -4:00 - WART 1991 Oct 6
448 -3:00 1:00 ARST 1992
449 -3:00 Arg AR%sT 1999 Oct 3
450 -4:00 Arg AR%sT 2000 Mar 3
418 -3:00 Arg AR%sT
451 -3:00 Arg AR%sT 2008 Oct 18
452 -3:00 - ART
419#
420# Catamarca (CT), Chubut (CH)
421Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
422 -4:16:48 - CMT 1920 May
423 -4:00 - ART 1930 Dec
424 -4:00 Arg AR%sT 1969 Oct 5
425 -3:00 Arg AR%sT 1991 Mar 3
426 -4:00 - WART 1991 Oct 20
427 -3:00 Arg AR%sT 1999 Oct 3
428 -4:00 Arg AR%sT 2000 Mar 3
429 -3:00 - ART 2004 Jun 1
430 -4:00 - WART 2004 Jun 20
453#
454# Catamarca (CT), Chubut (CH)
455Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
456 -4:16:48 - CMT 1920 May
457 -4:00 - ART 1930 Dec
458 -4:00 Arg AR%sT 1969 Oct 5
459 -3:00 Arg AR%sT 1991 Mar 3
460 -4:00 - WART 1991 Oct 20
461 -3:00 Arg AR%sT 1999 Oct 3
462 -4:00 Arg AR%sT 2000 Mar 3
463 -3:00 - ART 2004 Jun 1
464 -4:00 - WART 2004 Jun 20
431 -3:00 Arg AR%sT
465 -3:00 Arg AR%sT 2008 Oct 18
466 -3:00 - ART
432#
433# Mendoza (MZ)
434Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
435 -4:16:48 - CMT 1920 May
436 -4:00 - ART 1930 Dec
437 -4:00 Arg AR%sT 1969 Oct 5
438 -3:00 Arg AR%sT 1990 Mar 4
439 -4:00 - WART 1990 Oct 15
440 -4:00 1:00 WARST 1991 Mar 1
441 -4:00 - WART 1991 Oct 15
442 -4:00 1:00 WARST 1992 Mar 1
443 -4:00 - WART 1992 Oct 18
444 -3:00 Arg AR%sT 1999 Oct 3
445 -4:00 Arg AR%sT 2000 Mar 3
446 -3:00 - ART 2004 May 23
447 -4:00 - WART 2004 Sep 26
467#
468# Mendoza (MZ)
469Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
470 -4:16:48 - CMT 1920 May
471 -4:00 - ART 1930 Dec
472 -4:00 Arg AR%sT 1969 Oct 5
473 -3:00 Arg AR%sT 1990 Mar 4
474 -4:00 - WART 1990 Oct 15
475 -4:00 1:00 WARST 1991 Mar 1
476 -4:00 - WART 1991 Oct 15
477 -4:00 1:00 WARST 1992 Mar 1
478 -4:00 - WART 1992 Oct 18
479 -3:00 Arg AR%sT 1999 Oct 3
480 -4:00 Arg AR%sT 2000 Mar 3
481 -3:00 - ART 2004 May 23
482 -4:00 - WART 2004 Sep 26
448 -3:00 Arg AR%sT
483 -3:00 Arg AR%sT 2008 Oct 18
484 -3:00 - ART
449#
450# San Luis (SL)
451Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
452 -4:16:48 - CMT 1920 May
453 -4:00 - ART 1930 Dec
454 -4:00 Arg AR%sT 1969 Oct 5
455 -3:00 Arg AR%sT 1990
456 -3:00 1:00 ARST 1990 Mar 14
457 -4:00 - WART 1990 Oct 15
458 -4:00 1:00 WARST 1991 Mar 1
459 -4:00 - WART 1991 Jun 1
460 -3:00 - ART 1999 Oct 3
461 -4:00 1:00 WARST 2000 Mar 3
462 -3:00 - ART 2004 May 31
463 -4:00 - WART 2004 Jul 25
464 -3:00 Arg AR%sT 2008 Jan 21
465 -3:00 - ART
466#
467# Santa Cruz (SC)
468Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
469 -4:16:48 - CMT 1920 May # Cordoba Mean Time
470 -4:00 - ART 1930 Dec
471 -4:00 Arg AR%sT 1969 Oct 5
472 -3:00 Arg AR%sT 1999 Oct 3
473 -4:00 Arg AR%sT 2000 Mar 3
474 -3:00 - ART 2004 Jun 1
475 -4:00 - WART 2004 Jun 20
485#
486# San Luis (SL)
487Zone America/Argentina/San_Luis -4:25:24 - LMT 1894 Oct 31
488 -4:16:48 - CMT 1920 May
489 -4:00 - ART 1930 Dec
490 -4:00 Arg AR%sT 1969 Oct 5
491 -3:00 Arg AR%sT 1990
492 -3:00 1:00 ARST 1990 Mar 14
493 -4:00 - WART 1990 Oct 15
494 -4:00 1:00 WARST 1991 Mar 1
495 -4:00 - WART 1991 Jun 1
496 -3:00 - ART 1999 Oct 3
497 -4:00 1:00 WARST 2000 Mar 3
498 -3:00 - ART 2004 May 31
499 -4:00 - WART 2004 Jul 25
500 -3:00 Arg AR%sT 2008 Jan 21
501 -3:00 - ART
502#
503# Santa Cruz (SC)
504Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
505 -4:16:48 - CMT 1920 May # Cordoba Mean Time
506 -4:00 - ART 1930 Dec
507 -4:00 Arg AR%sT 1969 Oct 5
508 -3:00 Arg AR%sT 1999 Oct 3
509 -4:00 Arg AR%sT 2000 Mar 3
510 -3:00 - ART 2004 Jun 1
511 -4:00 - WART 2004 Jun 20
476 -3:00 Arg AR%sT
512 -3:00 Arg AR%sT 2008 Oct 18
513 -3:00 - ART
477#
478# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
479Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
480 -4:16:48 - CMT 1920 May # Cordoba Mean Time
481 -4:00 - ART 1930 Dec
482 -4:00 Arg AR%sT 1969 Oct 5
483 -3:00 Arg AR%sT 1999 Oct 3
484 -4:00 Arg AR%sT 2000 Mar 3
485 -3:00 - ART 2004 May 30
486 -4:00 - WART 2004 Jun 20
514#
515# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
516Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
517 -4:16:48 - CMT 1920 May # Cordoba Mean Time
518 -4:00 - ART 1930 Dec
519 -4:00 Arg AR%sT 1969 Oct 5
520 -3:00 Arg AR%sT 1999 Oct 3
521 -4:00 Arg AR%sT 2000 Mar 3
522 -3:00 - ART 2004 May 30
523 -4:00 - WART 2004 Jun 20
487 -3:00 Arg AR%sT
524 -3:00 Arg AR%sT 2008 Oct 18
525 -3:00 - ART
488
489# Aruba
490# Zone NAME GMTOFF RULES FORMAT [UNTIL]
491Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
492 -4:30 - ANT 1965 # Netherlands Antilles Time
493 -4:00 - AST
494
495# Bolivia
496# Zone NAME GMTOFF RULES FORMAT [UNTIL]
497Zone America/La_Paz -4:32:36 - LMT 1890
498 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
499 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
500 -4:00 - BOT # Bolivia Time
501
502# Brazil
503
504# From Paul Eggert (1993-11-18):
505# The mayor of Rio recently attempted to change the time zone rules
506# just in his city, in order to leave more summer time for the tourist trade.
507# The rule change lasted only part of the day;
508# the federal government refused to follow the city's rules, and business
509# was in a chaos, so the mayor backed down that afternoon.
510
511# From IATA SSIM (1996-02):
512# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
513# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
514# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
515# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
516# [The last three states are new to this issue of the IATA SSIM.]
517
518# From Gwillim Law (1996-10-07):
519# Geography, history (Tocantins was part of Goias until 1989), and other
520# sources of time zone information lead me to believe that AL, SE, and TO were
521# always in BR1, and so the only change was whether or not they observed DST....
522# The earliest issue of the SSIM I have is 2/91. Each issue from then until
523# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
524# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
525# (UTC-4).... The other two time zones given for Brazil are BR3, which is
526# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
527# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
528# become part of the state of Pernambuco). The boundary between BR1 and BR2
529# has never been clearly stated. They've simply been called East and West.
530# However, some conclusions can be drawn from another IATA manual: the Airline
531# Coding Directory, which lists close to 400 airports in Brazil. For each
532# airport it gives a time zone which is coded to the SSIM. From that
533# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
534# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
535# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
536
537# From Marcos Tadeu (1998-09-27):
538# <a href="http://pcdsh01.on.br/verao1.html">
539# Brazilian official page
540# </a>
541
542# From Jesper Norgaard (2000-11-03):
543# [For an official list of which regions in Brazil use which time zones, see:]
544# http://pcdsh01.on.br/Fusbr.htm
545# http://pcdsh01.on.br/Fusbrhv.htm
546
547# From Celso Doria via David Madeo (2002-10-09):
548# The reason for the delay this year has to do with elections in Brazil.
549#
550# Unlike in the United States, elections in Brazil are 100% computerized and
551# the results are known almost immediately. Yesterday, it was the first
552# round of the elections when 115 million Brazilians voted for President,
553# Governor, Senators, Federal Deputies, and State Deputies. Nobody is
554# counting (or re-counting) votes anymore and we know there will be a second
555# round for the Presidency and also for some Governors. The 2nd round will
556# take place on October 27th.
557#
558# The reason why the DST will only begin November 3rd is that the thousands
559# of electoral machines used cannot have their time changed, and since the
560# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
561# the Government decided to postpone DST, instead of changing the Constitution
562# (maybe, for the next elections, it will be possible to change the clock)...
563
564# From Rodrigo Severo (2004-10-04):
565# It's just the biannual change made necessary by the much hyped, supposedly
566# modern Brazilian eletronic voting machines which, apparently, can't deal
567# with a time change between the first and the second rounds of the elections.
568
569# From Steffen Thorsen (2007-09-20):
570# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
571# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
572
573# From Paul Schulze (2008-06-24):
574# ...by law number 11.662 of April 24, 2008 (published in the "Diario
575# Oficial da Uniao"...) in Brazil there are changes in the timezones,
576# effective today (00:00am at June 24, 2008) as follows:
577#
578# a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
579# part of the Amazonas state that had this timezone now being put to the
580# timezone UTC+4
581# b) The whole Para state now is put at timezone UTC+3, instead of just
582# part of it, as was before.
583#
584# This change follows a proposal of senator Tiao Viana of Acre state, that
585# proposed it due to concerns about open television channels displaying
586# programs inappropriate to youths in the states that had the timezone
587# UTC+5 too early in the night. In the occasion, some more corrections
588# were proposed, trying to unify the timezones of any given state. This
589# change modifies timezone rules defined in decree 2.784 of 18 June,
590# 1913.
591
592# From Rodrigo Severo (2008-06-24):
593# Just correcting the URL:
594# <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008">
595# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008
596# </a>
597#
598# As a result of the above Decree I believe the America/Rio_Branco
599# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
600# be created to represent the the west side of the Para State. I
601# suggest this new timezone be called Santarem as the most
602# important/populated city in the affected area.
603#
604# This new timezone would be the same as the Rio_Branco timezone up to
605# the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
606
607# From Alex Krivenyshev (2008-06-24):
608# This is a quick reference page for New and Old Brazil Time Zones map.
609# <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
610# http://www.worldtimezone.com/brazil-time-new-old.php
611# </a>
612#
613# - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
614# (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
615# part of Par state is moving to one timezone UTC- 03 (from UTC -04).
616
617# From Paul Eggert (2002-10-10):
618# The official decrees referenced below are mostly taken from
619# <a href="http://pcdsh01.on.br/DecHV.html">
620# Decretos sobre o Horario de Verao no Brasil
621# </a>.
622
623# From Steffen Thorsen (2008-08-29):
624# As announced by the government and many newspapers in Brazil late
625# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
626# it will end on 2009-02-15 (current rule for Brazil is fine). Based on
627# past years experience with the elections, there was a good chance that
628# the start was postponed to November, but it did not happen this year.
629#
630# It has not yet been posted to http://pcdsh01.on.br/DecHV.html
631#
632# An official page about it:
633# <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
634# http://www.mme.gov.br/site/news/detail.do?newsId=16722
635# </a>
636# Note that this link does not always work directly, but must be accessed
637# by going to
638# <a href="http://www.mme.gov.br/first">
639# http://www.mme.gov.br/first
640# </a>
641#
642# One example link that works directly:
643# <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
644# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
645# (Portuguese)
646# </a>
647#
648# We have a written a short article about it as well:
649# <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
650# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
651# </a>
652
653# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
654# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
655# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
656Rule Brazil 1931 only - Oct 3 11:00 1:00 S
657Rule Brazil 1932 1933 - Apr 1 0:00 0 -
658Rule Brazil 1932 only - Oct 3 0:00 1:00 S
659# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
660# revoked DST.
661# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
662# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
663Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
664Rule Brazil 1950 only - Apr 16 1:00 0 -
665Rule Brazil 1951 1952 - Apr 1 0:00 0 -
666# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
667Rule Brazil 1953 only - Mar 1 0:00 0 -
668# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
669# revoked DST.
670# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
671# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
672# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
673# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
674# extended the above decree to all of the national territory on 12-09.
675Rule Brazil 1963 only - Dec 9 0:00 1:00 S
676# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
677# extended summer time by one day to 1964-03-01 00:00 (start of school).
678Rule Brazil 1964 only - Mar 1 0:00 0 -
679# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
680Rule Brazil 1965 only - Jan 31 0:00 1:00 S
681Rule Brazil 1965 only - Mar 31 0:00 0 -
682# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
683Rule Brazil 1965 only - Dec 1 0:00 1:00 S
684# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
685Rule Brazil 1966 1968 - Mar 1 0:00 0 -
686Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
687# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
688# revoked DST.
689# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
690Rule Brazil 1985 only - Nov 2 0:00 1:00 S
691# Decree 92,310 (1986-01-21)
692# Decree 92,463 (1986-03-13)
693Rule Brazil 1986 only - Mar 15 0:00 0 -
694# Decree 93,316 (1986-10-01)
695Rule Brazil 1986 only - Oct 25 0:00 1:00 S
696Rule Brazil 1987 only - Feb 14 0:00 0 -
697# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
698Rule Brazil 1987 only - Oct 25 0:00 1:00 S
699Rule Brazil 1988 only - Feb 7 0:00 0 -
700# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
701# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
702Rule Brazil 1988 only - Oct 16 0:00 1:00 S
703Rule Brazil 1989 only - Jan 29 0:00 0 -
704# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
705# with the same exceptions
706Rule Brazil 1989 only - Oct 15 0:00 1:00 S
707Rule Brazil 1990 only - Feb 11 0:00 0 -
708# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
709# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
710# Decree 99,629 (1990-10-19) adds BA, MT.
711Rule Brazil 1990 only - Oct 21 0:00 1:00 S
712Rule Brazil 1991 only - Feb 17 0:00 0 -
713# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
714# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
715Rule Brazil 1991 only - Oct 20 0:00 1:00 S
716Rule Brazil 1992 only - Feb 9 0:00 0 -
717# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
718# adopted by same states.
719Rule Brazil 1992 only - Oct 25 0:00 1:00 S
720Rule Brazil 1993 only - Jan 31 0:00 0 -
721# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
722# adopted by same states, plus AM.
723# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
724# web page corrected 2004-01-07) adopted by same states, minus AM.
725# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
726# adopted by same states, plus MT and TO.
727# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
728# adds AL, SE.
729Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
730Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
731Rule Brazil 1996 only - Feb 11 0:00 0 -
732# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
733# adopted by same states, minus AL, SE.
734Rule Brazil 1996 only - Oct 6 0:00 1:00 S
735Rule Brazil 1997 only - Feb 16 0:00 0 -
736# From Daniel C. Sobral (1998-02-12):
737# In 1997, the DS began on October 6. The stated reason was that
738# because international television networks ignored Brazil's policy on DS,
739# they bought the wrong times on satellite for coverage of Pope's visit.
740# This year, the ending date of DS was postponed to March 1
741# to help dealing with the shortages of electric power.
742#
743# Decree 2,317 (1997-09-04), adopted by same states.
744Rule Brazil 1997 only - Oct 6 0:00 1:00 S
745# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
746# (1998-02-10)
747Rule Brazil 1998 only - Mar 1 0:00 0 -
748# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
749# adopted by the same states as before.
750Rule Brazil 1998 only - Oct 11 0:00 1:00 S
751Rule Brazil 1999 only - Feb 21 0:00 0 -
752# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
753# (1999-08-23) adopted by same states.
754# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
755# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
756Rule Brazil 1999 only - Oct 3 0:00 1:00 S
757Rule Brazil 2000 only - Feb 27 0:00 0 -
758# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
759# adopted by the same states as before.
760# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
761# repeals DST in PE and RR, effective 2000-10-15 00:00.
762# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
763# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
764# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
765# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
766Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
767Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
768# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
769# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
770Rule Brazil 2002 only - Nov 3 0:00 1:00 S
771# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
772# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
773Rule Brazil 2003 only - Oct 19 0:00 1:00 S
774# Decree 5,223 (2004-10-01) reestablishes DST in MT.
775# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
776Rule Brazil 2004 only - Nov 2 0:00 1:00 S
777# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
778# adopted by the same states as before.
779Rule Brazil 2005 only - Oct 16 0:00 1:00 S
780# Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
781# adopted by the same states as before.
782Rule Brazil 2006 only - Nov 5 0:00 1:00 S
783Rule Brazil 2007 only - Feb 25 0:00 0 -
784# Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
785# adopted by the same states as before.
786Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
787# From Frederico A. C. Neves (2008-09-10):
788# Acording to this decree
789# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
790# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
791# </a>
792# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
793# 3rd Feb Sunday. There is an exception on the return date when this is
794# the Carnival Sunday then the return date will be the next Sunday...
795Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
796Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
797Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
798Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
799Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
800Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
801Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
802Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
803Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
804Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
805Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
806Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
807Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
808# From Arthur David Olson (2008-09-29):
809# The next is wrong in some years but is better than nothing.
810Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
811
812# The latest ruleset listed above says that the following states observe DST:
813# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
814
815# Zone NAME GMTOFF RULES FORMAT [UNTIL]
816#
817# Fernando de Noronha (administratively part of PE)
818Zone America/Noronha -2:09:40 - LMT 1914
819 -2:00 Brazil FN%sT 1990 Sep 17
820 -2:00 - FNT 1999 Sep 30
821 -2:00 Brazil FN%sT 2000 Oct 15
822 -2:00 - FNT 2001 Sep 13
823 -2:00 Brazil FN%sT 2002 Oct 1
824 -2:00 - FNT
825# Other Atlantic islands have no permanent settlement.
826# These include Trindade and Martin Vaz (administratively part of ES),
827# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
828# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
829# it also included the Penedos.
830#
831# Amapa (AP), east Para (PA)
832# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
833# The division between east and west Para is the river Xingu.
834# In the north a very small part from the river Javary (now Jari I guess,
835# the border with Amapa) to the Amazon, then to the Xingu.
836Zone America/Belem -3:13:56 - LMT 1914
837 -3:00 Brazil BR%sT 1988 Sep 12
838 -3:00 - BRT
839#
840# west Para (PA)
841# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
842Zone America/Santarem -3:38:48 - LMT 1914
843 -4:00 Brazil AM%sT 1988 Sep 12
844 -4:00 - AMT 2008 Jun 24 00:00
845 -3:00 - BRT
846#
847# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
848# Paraiba (PB)
849Zone America/Fortaleza -2:34:00 - LMT 1914
850 -3:00 Brazil BR%sT 1990 Sep 17
851 -3:00 - BRT 1999 Sep 30
852 -3:00 Brazil BR%sT 2000 Oct 22
853 -3:00 - BRT 2001 Sep 13
854 -3:00 Brazil BR%sT 2002 Oct 1
855 -3:00 - BRT
856#
857# Pernambuco (PE) (except Atlantic islands)
858Zone America/Recife -2:19:36 - LMT 1914
859 -3:00 Brazil BR%sT 1990 Sep 17
860 -3:00 - BRT 1999 Sep 30
861 -3:00 Brazil BR%sT 2000 Oct 15
862 -3:00 - BRT 2001 Sep 13
863 -3:00 Brazil BR%sT 2002 Oct 1
864 -3:00 - BRT
865#
866# Tocantins (TO)
867Zone America/Araguaina -3:12:48 - LMT 1914
868 -3:00 Brazil BR%sT 1990 Sep 17
869 -3:00 - BRT 1995 Sep 14
870 -3:00 Brazil BR%sT 2003 Sep 24
871 -3:00 - BRT
872#
873# Alagoas (AL), Sergipe (SE)
874Zone America/Maceio -2:22:52 - LMT 1914
875 -3:00 Brazil BR%sT 1990 Sep 17
876 -3:00 - BRT 1995 Oct 13
877 -3:00 Brazil BR%sT 1996 Sep 4
878 -3:00 - BRT 1999 Sep 30
879 -3:00 Brazil BR%sT 2000 Oct 22
880 -3:00 - BRT 2001 Sep 13
881 -3:00 Brazil BR%sT 2002 Oct 1
882 -3:00 - BRT
883#
884# Bahia (BA)
885# There are too many Salvadors elsewhere, so use America/Bahia instead
886# of America/Salvador.
887Zone America/Bahia -2:34:04 - LMT 1914
888 -3:00 Brazil BR%sT 2003 Sep 24
889 -3:00 - BRT
890#
891# Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
892# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
893# Santa Catarina (SC), Rio Grande do Sul (RS)
894Zone America/Sao_Paulo -3:06:28 - LMT 1914
895 -3:00 Brazil BR%sT 1963 Oct 23 00:00
896 -3:00 1:00 BRST 1964
897 -3:00 Brazil BR%sT
898#
899# Mato Grosso do Sul (MS)
900Zone America/Campo_Grande -3:38:28 - LMT 1914
901 -4:00 Brazil AM%sT
902#
903# Mato Grosso (MT)
904Zone America/Cuiaba -3:44:20 - LMT 1914
905 -4:00 Brazil AM%sT 2003 Sep 24
906 -4:00 - AMT 2004 Oct 1
907 -4:00 Brazil AM%sT
908#
909# Rondonia (RO)
910Zone America/Porto_Velho -4:15:36 - LMT 1914
911 -4:00 Brazil AM%sT 1988 Sep 12
912 -4:00 - AMT
913#
914# Roraima (RR)
915Zone America/Boa_Vista -4:02:40 - LMT 1914
916 -4:00 Brazil AM%sT 1988 Sep 12
917 -4:00 - AMT 1999 Sep 30
918 -4:00 Brazil AM%sT 2000 Oct 15
919 -4:00 - AMT
920#
921# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
922# The great circle line from Tabatinga to Porto Acre divides
923# east from west Amazonas.
924Zone America/Manaus -4:00:04 - LMT 1914
925 -4:00 Brazil AM%sT 1988 Sep 12
926 -4:00 - AMT 1993 Sep 28
927 -4:00 Brazil AM%sT 1994 Sep 22
928 -4:00 - AMT
929#
930# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
931# Eirunepe, Envira, Ipixuna
932Zone America/Eirunepe -4:39:28 - LMT 1914
933 -5:00 Brazil AC%sT 1988 Sep 12
934 -5:00 - ACT 1993 Sep 28
935 -5:00 Brazil AC%sT 1994 Sep 22
936 -5:00 - ACT 2008 Jun 24 00:00
937 -4:00 - AMT
938#
939# Acre (AC)
940Zone America/Rio_Branco -4:31:12 - LMT 1914
941 -5:00 Brazil AC%sT 1988 Sep 12
942 -5:00 - ACT 2008 Jun 24 00:00
943 -4:00 - AMT
944
945# Chile
946
947# From Eduardo Krell (1995-10-19):
948# The law says to switch to DST at midnight [24:00] on the second SATURDAY
949# of October.... The law is the same for March and October.
950# (1998-09-29):
951# Because of the drought this year, the government decided to go into
952# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
953# (unless there's another dry season next year, I guess).
954
955# From Julio I. Pacheco Troncoso (1999-03-18):
956# Because of the same drought, the government decided to end DST later,
957# on April 3, (one-time change).
958
959# From Oscar van Vlijmen (2006-10-08):
960# http://www.horaoficial.cl/cambio.htm
961
962# From Jesper Norgaard Welen (2006-10-08):
963# I think that there are some obvious mistakes in the suggested link
964# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
965# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
966# (they should have been 1990-09-15 and 1990-09-16 respectively), but
967# anyhow it clears up some doubts too.
968
969# From Paul Eggert (2006-12-27):
970# The following data for Chile and America/Santiago are from
971# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
972# Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
973# & Pottenger, except with DST transitions after 1932 cloned from
974# America/Santiago. The pre-1980 Pacific/Easter data are dubious,
975# but we have no other source.
976
977# From German Poo-Caaman~o (2008-03-03):
978# Due to drought, Chile extends Daylight Time in three weeks. This
979# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
980# and Saturday 3/29 at 22:00 for Pacific/Easter)
981# The Supreme Decree is located at
982# <a href="http://www.shoa.cl/servicios/supremo316.pdf">
983# http://www.shoa.cl/servicios/supremo316.pdf
984# </a>
985# and the instructions for 2008 are located in:
986# <a href="http://www.horaoficial.cl/cambio.htm">
987# http://www.horaoficial.cl/cambio.htm
988# </a>.
989
990# From Jose Miguel Garrido (2008-03-05):
991# ...
992# You could see the announces of the change on
993# <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
994# http://www.shoa.cl/noticias/2008/04hora/hora.htm
995# </a>.
996
997# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
998Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
999Rule Chile 1928 1932 - Apr 1 0:00 0 -
1000Rule Chile 1942 only - Jun 1 4:00u 0 -
1001Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1002Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1003Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1004Rule Chile 1947 only - Apr 1 4:00u 0 -
1005Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1006Rule Chile 1969 only - Mar 30 3:00u 0 -
1007Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1008Rule Chile 1970 only - Mar 29 3:00u 0 -
1009Rule Chile 1971 only - Mar 14 3:00u 0 -
1010Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1011Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1012Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1013Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1014Rule Chile 1987 only - Apr 12 3:00u 0 -
1015Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1016Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1017Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1018Rule Chile 1990 only - Mar 18 3:00u 0 -
1019Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1020Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1021Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1022Rule Chile 1997 only - Mar 30 3:00u 0 -
1023Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1024Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1025Rule Chile 1999 only - Apr 4 3:00u 0 -
1026Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
1027Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1028# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1029# which is used below in specifying the transition.
1030Rule Chile 2008 only - Mar 30 3:00u 0 -
1031Rule Chile 2009 max - Mar Sun>=9 3:00u 0 -
1032# IATA SSIM anomalies: (1992-02) says 1992-03-14;
1033# (1996-09) says 1998-03-08. Ignore these.
1034# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1035Zone America/Santiago -4:42:46 - LMT 1890
1036 -4:42:46 - SMT 1910 # Santiago Mean Time
1037 -5:00 - CLT 1916 Jul 1 # Chile Time
1038 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1039 -4:00 - CLT 1919 Jul 1 # Chile Time
1040 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1041 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1042 -4:00 Chile CL%sT
1043Zone Pacific/Easter -7:17:44 - LMT 1890
1044 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1045 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1046 -6:00 Chile EAS%sT
1047#
1048# Sala y Gomez Island is like Pacific/Easter.
1049# Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1050# San Felix, and Antarctic bases, are like America/Santiago.
1051
1052# Colombia
1053# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1054Rule CO 1992 only - May 3 0:00 1:00 S
1055Rule CO 1993 only - Apr 4 0:00 0 -
1056# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1057Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
1058 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
1059 -5:00 CO CO%sT # Colombia Time
1060# Malpelo, Providencia, San Andres
1061# no information; probably like America/Bogota
1062
1063# Curacao
1064#
1065# From Paul Eggert (2006-03-22):
1066# Shanks & Pottenger say that The Bottom and Philipsburg have been at
1067# -4:00 since standard time was introduced on 1912-03-02; and that
1068# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1069# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1070# Saba Island has been like Curacao.
1071# This all predates our 1970 cutoff, though.
1072#
1073# By July 2007 Curacao and St Maarten are planned to become
1074# associated states within the Netherlands, much like Aruba;
1075# Bonaire, Saba and St Eustatius would become directly part of the
1076# Netherlands as Kingdom Islands. This won't affect their time zones
1077# though, as far as we know.
1078#
1079# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1080Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
1081 -4:30 - ANT 1965 # Netherlands Antilles Time
1082 -4:00 - AST
1083
1084# Ecuador
1085#
1086# From Paul Eggert (2007-03-04):
1087# Apparently Ecuador had a failed experiment with DST in 1992.
1088# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1089# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1090# talk about "hora Sixto". Leave this alone for now, as we have no data.
1091#
1092# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1093Zone America/Guayaquil -5:19:20 - LMT 1890
1094 -5:14:00 - QMT 1931 # Quito Mean Time
1095 -5:00 - ECT # Ecuador Time
1096Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1097 -5:00 - ECT 1986
1098 -6:00 - GALT # Galapagos Time
1099
1100# Falklands
1101
1102# From Paul Eggert (2006-03-22):
1103# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1104# the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1105
1106# From Falkland Islands Government Office, London (2001-01-22)
1107# via Jesper Norgaard:
1108# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1109# April 2001 and advance one hour to summer time at 2 am on Sunday 2
1110# September. It is anticipated that the clocks will revert back at 2
1111# am on Sunday 21 April 2002 and advance to summer time at 2 am on
1112# Sunday 1 September.
1113
1114# From Rives McDow (2001-02-13):
1115#
1116# I have communicated several times with people there, and the last
1117# time I had communications that was helpful was in 1998. Here is
1118# what was said then:
1119#
1120# "The general rule was that Stanley used daylight saving and the Camp
1121# did not. However for various reasons many people in the Camp have
1122# started to use daylight saving (known locally as 'Stanley Time')
1123# There is no rule as to who uses daylight saving - it is a matter of
1124# personal choice and so it is impossible to draw a map showing who
1125# uses it and who does not. Any list would be out of date as soon as
1126# it was produced. This year daylight saving ended on April 18/19th
1127# and started again on September 12/13th. I do not know what the rule
1128# is, but can find out if you like. We do not change at the same time
1129# as UK or Chile."
1130#
1131# I did have in my notes that the rule was "Second Saturday in Sep at
1132# 0:00 until third Saturday in Apr at 0:00". I think that this does
1133# not agree in some cases with Shanks; is this true?
1134#
1135# Also, there is no mention in the list that some areas in the
1136# Falklands do not use DST. I have found in my communications there
1137# that these areas are on the western half of East Falkland and all of
1138# West Falkland. Stanley is the only place that consistently observes
1139# DST. Again, as in other places in the world, the farmers don't like
1140# it. West Falkland is almost entirely sheep farmers.
1141#
1142# I know one lady there that keeps a list of which farm keeps DST and
1143# which doesn't each year. She runs a shop in Stanley, and says that
1144# the list changes each year. She uses it to communicate to her
1145# customers, catching them when they are home for lunch or dinner.
1146
1147# From Paul Eggert (2001-03-05):
1148# For now, we'll just record the time in Stanley, since we have no
1149# better info.
1150
1151# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1152Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1153Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1154Rule Falk 1939 only - Oct 1 0:00 1:00 S
1155Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1156Rule Falk 1943 only - Jan 1 0:00 0 -
1157Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1158Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1159Rule Falk 1984 only - Sep 16 0:00 1:00 S
1160Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1161Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1162Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
1163Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
1164# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1165Zone Atlantic/Stanley -3:51:24 - LMT 1890
1166 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1167 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1168 -3:00 Falk FK%sT 1985 Sep 15
1169 -4:00 Falk FK%sT
1170
1171# French Guiana
1172# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1173Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1174 -4:00 - GFT 1967 Oct # French Guiana Time
1175 -3:00 - GFT
1176
1177# Guyana
1178# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1179Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1180 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1181 -3:45 - GYT 1975 Jul 31 # Guyana Time
1182 -3:00 - GYT 1991
1183# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1184 -4:00 - GYT
1185
1186# Paraguay
1187# From Paul Eggert (2006-03-22):
1188# Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1189# and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1190# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1191# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1192Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1193Rule Para 1975 1978 - Mar 1 0:00 0 -
1194Rule Para 1979 1991 - Apr 1 0:00 0 -
1195Rule Para 1989 only - Oct 22 0:00 1:00 S
1196Rule Para 1990 only - Oct 1 0:00 1:00 S
1197Rule Para 1991 only - Oct 6 0:00 1:00 S
1198Rule Para 1992 only - Mar 1 0:00 0 -
1199Rule Para 1992 only - Oct 5 0:00 1:00 S
1200Rule Para 1993 only - Mar 31 0:00 0 -
1201Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1202Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1203Rule Para 1996 only - Mar 1 0:00 0 -
1204# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1205# From Steffen Thorsen (2000-10-02):
1206# I have three independent reports that Paraguay changed to DST this Sunday
1207# (10-01).
1208#
1209# Translated by Gwillim Law (2001-02-27) from
1210# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1211# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1212# </a>:
1213# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1214# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1215# system has been operating for several years. Formerly there was a separate
1216# decree each year; the new law has the same effect, but permanently. Every
1217# year, the time will change on the first Sunday of October; likewise, the
1218# clock will be set back on the first Sunday of March.
1219#
1220Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1221# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1222Rule Para 1997 only - Feb lastSun 0:00 0 -
1223# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1224# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1225Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1226# From Rives McDow (2002-02-28):
1227# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1228# dst method to be from the first Sunday in September to the first Sunday in
1229# April.
1230Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1231Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1232#
1233# From Jesper Norgaard Welen (2005-01-02):
1234# There are several sources that claim that Paraguay made
1235# a timezone rule change in autumn 2004.
1236# From Steffen Thorsen (2005-01-05):
1237# Decree 1,867 (2004-03-05)
1238# From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1239# <http://www.presidencia.gov.py/decretos/D1867.pdf>
1240Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S
1241Rule Para 2005 max - Mar Sun>=8 0:00 0 -
1242
1243# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1244Zone America/Asuncion -3:50:40 - LMT 1890
1245 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1246 -4:00 - PYT 1972 Oct # Paraguay Time
1247 -3:00 - PYT 1974 Apr
1248 -4:00 Para PY%sT
1249
1250# Peru
1251#
1252# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1253# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1254# When we were in Peru in 1985-1986, they apparently switched over
1255# sometime between December 29 and January 3 while we were on the Amazon.
1256#
1257# From Paul Eggert (2006-03-22):
1258# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1259
1260# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1261Rule Peru 1938 only - Jan 1 0:00 1:00 S
1262Rule Peru 1938 only - Apr 1 0:00 0 -
1263Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1264Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1265Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1266Rule Peru 1986 1987 - Apr 1 0:00 0 -
1267Rule Peru 1990 only - Jan 1 0:00 1:00 S
1268Rule Peru 1990 only - Apr 1 0:00 0 -
1269# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1270Rule Peru 1994 only - Jan 1 0:00 1:00 S
1271Rule Peru 1994 only - Apr 1 0:00 0 -
1272# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1273Zone America/Lima -5:08:12 - LMT 1890
1274 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1275 -5:00 Peru PE%sT # Peru Time
1276
1277# South Georgia
1278# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1279Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1280 -2:00 - GST # South Georgia Time
1281
1282# South Sandwich Is
1283# uninhabited; scientific personnel have wintered
1284
1285# Suriname
1286# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1287Zone America/Paramaribo -3:40:40 - LMT 1911
1288 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1289 -3:40:36 - PMT 1945 Oct # The capital moved?
1290 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1291 -3:30 - SRT 1984 Oct # Suriname Time
1292 -3:00 - SRT
1293
1294# Trinidad and Tobago
1295# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1296Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1297 -4:00 - AST
1298
1299# Uruguay
1300# From Paul Eggert (1993-11-18):
1301# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1302# From Shanks & Pottenger:
1303# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1304# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1305Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1306Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1307Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1308Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1309# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1310Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1311Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1312Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1313# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1314Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1315# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1316# and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1317Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1318Rule Uruguay 1942 only - Jan 1 0:00 0 -
1319Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1320Rule Uruguay 1943 only - Mar 14 0:00 0 -
1321Rule Uruguay 1959 only - May 24 0:00 1:00 S
1322Rule Uruguay 1959 only - Nov 15 0:00 0 -
1323Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1324Rule Uruguay 1960 only - Mar 6 0:00 0 -
1325Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1326Rule Uruguay 1965 only - Sep 26 0:00 0 -
1327Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1328Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1329Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1330Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1331Rule Uruguay 1972 only - Aug 15 0:00 0 -
1332Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1333Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1334Rule Uruguay 1976 only - Oct 1 0:00 0 -
1335Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1336Rule Uruguay 1978 only - Apr 1 0:00 0 -
1337Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1338Rule Uruguay 1980 only - May 1 0:00 0 -
1339Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1340Rule Uruguay 1988 only - Mar 14 0:00 0 -
1341Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1342Rule Uruguay 1989 only - Mar 12 0:00 0 -
1343Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1344# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1345# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1346Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1347Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1348Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1349Rule Uruguay 1993 only - Feb 28 0:00 0 -
1350# From Eduardo Cota (2004-09-20):
1351# The uruguayan government has decreed a change in the local time....
1352# http://www.presidencia.gub.uy/decretos/2004091502.htm
1353Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1354# From Steffen Thorsen (2005-03-11):
1355# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1356# save energy ... it was postponed two weeks....
1357# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1358Rule Uruguay 2005 only - Mar 27 2:00 0 -
1359# From Eduardo Cota (2005-09-27):
1360# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1361# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1362# 02:00 local time, official time in Uruguay will be at GMT -2.
1363Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1364Rule Uruguay 2006 only - Mar 12 2:00 0 -
1365# From Jesper Norgaard Welen (2006-09-06):
1366# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1367Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1368Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1369# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1370Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1371 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1372 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1373 -3:00 Uruguay UY%sT
1374
1375# Venezuela
1376#
1377# From John Stainforth (2007-11-28):
1378# ... the change for Venezuela originally expected for 2007-12-31 has
1379# been brought forward to 2007-12-09. The official announcement was
1380# published today in the "Gaceta Oficial de la Republica Bolivariana
1381# de Venezuela, numero 38.819" (official document for all laws or
1382# resolution publication)
1383# http://www.globovision.com/news.php?nid=72208
1384
1385# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1386Zone America/Caracas -4:27:44 - LMT 1890
1387 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1388 -4:30 - VET 1965 # Venezuela Time
1389 -4:00 - VET 2007 Dec 9 03:00
1390 -4:30 - VET
526
527# Aruba
528# Zone NAME GMTOFF RULES FORMAT [UNTIL]
529Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
530 -4:30 - ANT 1965 # Netherlands Antilles Time
531 -4:00 - AST
532
533# Bolivia
534# Zone NAME GMTOFF RULES FORMAT [UNTIL]
535Zone America/La_Paz -4:32:36 - LMT 1890
536 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
537 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
538 -4:00 - BOT # Bolivia Time
539
540# Brazil
541
542# From Paul Eggert (1993-11-18):
543# The mayor of Rio recently attempted to change the time zone rules
544# just in his city, in order to leave more summer time for the tourist trade.
545# The rule change lasted only part of the day;
546# the federal government refused to follow the city's rules, and business
547# was in a chaos, so the mayor backed down that afternoon.
548
549# From IATA SSIM (1996-02):
550# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
551# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
552# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
553# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
554# [The last three states are new to this issue of the IATA SSIM.]
555
556# From Gwillim Law (1996-10-07):
557# Geography, history (Tocantins was part of Goias until 1989), and other
558# sources of time zone information lead me to believe that AL, SE, and TO were
559# always in BR1, and so the only change was whether or not they observed DST....
560# The earliest issue of the SSIM I have is 2/91. Each issue from then until
561# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
562# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
563# (UTC-4).... The other two time zones given for Brazil are BR3, which is
564# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
565# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
566# become part of the state of Pernambuco). The boundary between BR1 and BR2
567# has never been clearly stated. They've simply been called East and West.
568# However, some conclusions can be drawn from another IATA manual: the Airline
569# Coding Directory, which lists close to 400 airports in Brazil. For each
570# airport it gives a time zone which is coded to the SSIM. From that
571# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
572# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
573# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
574
575# From Marcos Tadeu (1998-09-27):
576# <a href="http://pcdsh01.on.br/verao1.html">
577# Brazilian official page
578# </a>
579
580# From Jesper Norgaard (2000-11-03):
581# [For an official list of which regions in Brazil use which time zones, see:]
582# http://pcdsh01.on.br/Fusbr.htm
583# http://pcdsh01.on.br/Fusbrhv.htm
584
585# From Celso Doria via David Madeo (2002-10-09):
586# The reason for the delay this year has to do with elections in Brazil.
587#
588# Unlike in the United States, elections in Brazil are 100% computerized and
589# the results are known almost immediately. Yesterday, it was the first
590# round of the elections when 115 million Brazilians voted for President,
591# Governor, Senators, Federal Deputies, and State Deputies. Nobody is
592# counting (or re-counting) votes anymore and we know there will be a second
593# round for the Presidency and also for some Governors. The 2nd round will
594# take place on October 27th.
595#
596# The reason why the DST will only begin November 3rd is that the thousands
597# of electoral machines used cannot have their time changed, and since the
598# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
599# the Government decided to postpone DST, instead of changing the Constitution
600# (maybe, for the next elections, it will be possible to change the clock)...
601
602# From Rodrigo Severo (2004-10-04):
603# It's just the biannual change made necessary by the much hyped, supposedly
604# modern Brazilian eletronic voting machines which, apparently, can't deal
605# with a time change between the first and the second rounds of the elections.
606
607# From Steffen Thorsen (2007-09-20):
608# Brazil will start DST on 2007-10-14 00:00 and end on 2008-02-17 00:00:
609# http://www.mme.gov.br/site/news/detail.do;jsessionid=BBA06811AFCAAC28F0285210913513DA?newsId=13975
610
611# From Paul Schulze (2008-06-24):
612# ...by law number 11.662 of April 24, 2008 (published in the "Diario
613# Oficial da Uniao"...) in Brazil there are changes in the timezones,
614# effective today (00:00am at June 24, 2008) as follows:
615#
616# a) The timezone UTC+5 is e[x]tinguished, with all the Acre state and the
617# part of the Amazonas state that had this timezone now being put to the
618# timezone UTC+4
619# b) The whole Para state now is put at timezone UTC+3, instead of just
620# part of it, as was before.
621#
622# This change follows a proposal of senator Tiao Viana of Acre state, that
623# proposed it due to concerns about open television channels displaying
624# programs inappropriate to youths in the states that had the timezone
625# UTC+5 too early in the night. In the occasion, some more corrections
626# were proposed, trying to unify the timezones of any given state. This
627# change modifies timezone rules defined in decree 2.784 of 18 June,
628# 1913.
629
630# From Rodrigo Severo (2008-06-24):
631# Just correcting the URL:
632# <a href="https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008">
633# https://www.in.gov.br/imprensa/visualiza/index.jsp?jornal=3Ddo&secao=3D1&pagina=3D1&data=3D25/04/2008
634# </a>
635#
636# As a result of the above Decree I believe the America/Rio_Branco
637# timezone shall be modified from UTC-5 to UTC-4 and a new timezone shall
638# be created to represent the the west side of the Para State. I
639# suggest this new timezone be called Santarem as the most
640# important/populated city in the affected area.
641#
642# This new timezone would be the same as the Rio_Branco timezone up to
643# the 2008/06/24 change which would be to UTC-3 instead of UTC-4.
644
645# From Alex Krivenyshev (2008-06-24):
646# This is a quick reference page for New and Old Brazil Time Zones map.
647# <a href="http://www.worldtimezone.com/brazil-time-new-old.php">
648# http://www.worldtimezone.com/brazil-time-new-old.php
649# </a>
650#
651# - 4 time zones replaced by 3 time zones-eliminating time zone UTC- 05
652# (state Acre and the part of the Amazonas will be UTC/GMT- 04) - western
653# part of Par state is moving to one timezone UTC- 03 (from UTC -04).
654
655# From Paul Eggert (2002-10-10):
656# The official decrees referenced below are mostly taken from
657# <a href="http://pcdsh01.on.br/DecHV.html">
658# Decretos sobre o Horario de Verao no Brasil
659# </a>.
660
661# From Steffen Thorsen (2008-08-29):
662# As announced by the government and many newspapers in Brazil late
663# yesterday, Brazil will start DST on 2008-10-19 (need to change rule) and
664# it will end on 2009-02-15 (current rule for Brazil is fine). Based on
665# past years experience with the elections, there was a good chance that
666# the start was postponed to November, but it did not happen this year.
667#
668# It has not yet been posted to http://pcdsh01.on.br/DecHV.html
669#
670# An official page about it:
671# <a href="http://www.mme.gov.br/site/news/detail.do?newsId=16722">
672# http://www.mme.gov.br/site/news/detail.do?newsId=16722
673# </a>
674# Note that this link does not always work directly, but must be accessed
675# by going to
676# <a href="http://www.mme.gov.br/first">
677# http://www.mme.gov.br/first
678# </a>
679#
680# One example link that works directly:
681# <a href="http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54">
682# http://jornale.com.br/index.php?option=com_content&task=view&id=13530&Itemid=54
683# (Portuguese)
684# </a>
685#
686# We have a written a short article about it as well:
687# <a href="http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html">
688# http://www.timeanddate.com/news/time/brazil-dst-2008-2009.html
689# </a>
690
691# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
692# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
693# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
694Rule Brazil 1931 only - Oct 3 11:00 1:00 S
695Rule Brazil 1932 1933 - Apr 1 0:00 0 -
696Rule Brazil 1932 only - Oct 3 0:00 1:00 S
697# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
698# revoked DST.
699# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
700# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
701Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
702Rule Brazil 1950 only - Apr 16 1:00 0 -
703Rule Brazil 1951 1952 - Apr 1 0:00 0 -
704# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
705Rule Brazil 1953 only - Mar 1 0:00 0 -
706# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
707# revoked DST.
708# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
709# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
710# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
711# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
712# extended the above decree to all of the national territory on 12-09.
713Rule Brazil 1963 only - Dec 9 0:00 1:00 S
714# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
715# extended summer time by one day to 1964-03-01 00:00 (start of school).
716Rule Brazil 1964 only - Mar 1 0:00 0 -
717# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
718Rule Brazil 1965 only - Jan 31 0:00 1:00 S
719Rule Brazil 1965 only - Mar 31 0:00 0 -
720# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
721Rule Brazil 1965 only - Dec 1 0:00 1:00 S
722# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
723Rule Brazil 1966 1968 - Mar 1 0:00 0 -
724Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
725# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
726# revoked DST.
727# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
728Rule Brazil 1985 only - Nov 2 0:00 1:00 S
729# Decree 92,310 (1986-01-21)
730# Decree 92,463 (1986-03-13)
731Rule Brazil 1986 only - Mar 15 0:00 0 -
732# Decree 93,316 (1986-10-01)
733Rule Brazil 1986 only - Oct 25 0:00 1:00 S
734Rule Brazil 1987 only - Feb 14 0:00 0 -
735# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
736Rule Brazil 1987 only - Oct 25 0:00 1:00 S
737Rule Brazil 1988 only - Feb 7 0:00 0 -
738# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
739# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
740Rule Brazil 1988 only - Oct 16 0:00 1:00 S
741Rule Brazil 1989 only - Jan 29 0:00 0 -
742# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
743# with the same exceptions
744Rule Brazil 1989 only - Oct 15 0:00 1:00 S
745Rule Brazil 1990 only - Feb 11 0:00 0 -
746# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
747# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
748# Decree 99,629 (1990-10-19) adds BA, MT.
749Rule Brazil 1990 only - Oct 21 0:00 1:00 S
750Rule Brazil 1991 only - Feb 17 0:00 0 -
751# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
752# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
753Rule Brazil 1991 only - Oct 20 0:00 1:00 S
754Rule Brazil 1992 only - Feb 9 0:00 0 -
755# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
756# adopted by same states.
757Rule Brazil 1992 only - Oct 25 0:00 1:00 S
758Rule Brazil 1993 only - Jan 31 0:00 0 -
759# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
760# adopted by same states, plus AM.
761# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
762# web page corrected 2004-01-07) adopted by same states, minus AM.
763# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
764# adopted by same states, plus MT and TO.
765# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
766# adds AL, SE.
767Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
768Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
769Rule Brazil 1996 only - Feb 11 0:00 0 -
770# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
771# adopted by same states, minus AL, SE.
772Rule Brazil 1996 only - Oct 6 0:00 1:00 S
773Rule Brazil 1997 only - Feb 16 0:00 0 -
774# From Daniel C. Sobral (1998-02-12):
775# In 1997, the DS began on October 6. The stated reason was that
776# because international television networks ignored Brazil's policy on DS,
777# they bought the wrong times on satellite for coverage of Pope's visit.
778# This year, the ending date of DS was postponed to March 1
779# to help dealing with the shortages of electric power.
780#
781# Decree 2,317 (1997-09-04), adopted by same states.
782Rule Brazil 1997 only - Oct 6 0:00 1:00 S
783# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
784# (1998-02-10)
785Rule Brazil 1998 only - Mar 1 0:00 0 -
786# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
787# adopted by the same states as before.
788Rule Brazil 1998 only - Oct 11 0:00 1:00 S
789Rule Brazil 1999 only - Feb 21 0:00 0 -
790# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
791# (1999-08-23) adopted by same states.
792# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
793# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
794Rule Brazil 1999 only - Oct 3 0:00 1:00 S
795Rule Brazil 2000 only - Feb 27 0:00 0 -
796# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
797# adopted by the same states as before.
798# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
799# repeals DST in PE and RR, effective 2000-10-15 00:00.
800# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
801# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
802# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
803# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
804Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
805Rule Brazil 2001 2006 - Feb Sun>=15 0:00 0 -
806# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
807# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm">4,399</a>
808Rule Brazil 2002 only - Nov 3 0:00 1:00 S
809# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
810# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm">4,844</a>
811Rule Brazil 2003 only - Oct 19 0:00 1:00 S
812# Decree 5,223 (2004-10-01) reestablishes DST in MT.
813# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm">5,223</a>
814Rule Brazil 2004 only - Nov 2 0:00 1:00 S
815# Decree <a href="http://pcdsh01.on.br/DecHV5539.gif">5,539</a> (2005-09-19),
816# adopted by the same states as before.
817Rule Brazil 2005 only - Oct 16 0:00 1:00 S
818# Decree <a href="http://pcdsh01.on.br/DecHV5920.gif">5,920</a> (2006-10-03),
819# adopted by the same states as before.
820Rule Brazil 2006 only - Nov 5 0:00 1:00 S
821Rule Brazil 2007 only - Feb 25 0:00 0 -
822# Decree <a href="http://pcdsh01.on.br/DecHV6212.gif">6,212</a> (2007-09-26),
823# adopted by the same states as before.
824Rule Brazil 2007 only - Oct Sun>=8 0:00 1:00 S
825# From Frederico A. C. Neves (2008-09-10):
826# Acording to this decree
827# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm">
828# http://www.planalto.gov.br/ccivil_03/_Ato2007-2010/2008/Decreto/D6558.htm
829# </a>
830# [t]he DST period in Brazil now on will be from the 3rd Oct Sunday to the
831# 3rd Feb Sunday. There is an exception on the return date when this is
832# the Carnival Sunday then the return date will be the next Sunday...
833Rule Brazil 2008 max - Oct Sun>=15 0:00 1:00 S
834Rule Brazil 2008 2011 - Feb Sun>=15 0:00 0 -
835Rule Brazil 2012 only - Feb Sun>=22 0:00 0 -
836Rule Brazil 2013 2014 - Feb Sun>=15 0:00 0 -
837Rule Brazil 2015 only - Feb Sun>=22 0:00 0 -
838Rule Brazil 2016 2022 - Feb Sun>=15 0:00 0 -
839Rule Brazil 2023 only - Feb Sun>=22 0:00 0 -
840Rule Brazil 2024 2025 - Feb Sun>=15 0:00 0 -
841Rule Brazil 2026 only - Feb Sun>=22 0:00 0 -
842Rule Brazil 2027 2033 - Feb Sun>=15 0:00 0 -
843Rule Brazil 2034 only - Feb Sun>=22 0:00 0 -
844Rule Brazil 2035 2036 - Feb Sun>=15 0:00 0 -
845Rule Brazil 2037 only - Feb Sun>=22 0:00 0 -
846# From Arthur David Olson (2008-09-29):
847# The next is wrong in some years but is better than nothing.
848Rule Brazil 2038 max - Feb Sun>=15 0:00 0 -
849
850# The latest ruleset listed above says that the following states observe DST:
851# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
852
853# Zone NAME GMTOFF RULES FORMAT [UNTIL]
854#
855# Fernando de Noronha (administratively part of PE)
856Zone America/Noronha -2:09:40 - LMT 1914
857 -2:00 Brazil FN%sT 1990 Sep 17
858 -2:00 - FNT 1999 Sep 30
859 -2:00 Brazil FN%sT 2000 Oct 15
860 -2:00 - FNT 2001 Sep 13
861 -2:00 Brazil FN%sT 2002 Oct 1
862 -2:00 - FNT
863# Other Atlantic islands have no permanent settlement.
864# These include Trindade and Martin Vaz (administratively part of ES),
865# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
866# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
867# it also included the Penedos.
868#
869# Amapa (AP), east Para (PA)
870# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
871# The division between east and west Para is the river Xingu.
872# In the north a very small part from the river Javary (now Jari I guess,
873# the border with Amapa) to the Amazon, then to the Xingu.
874Zone America/Belem -3:13:56 - LMT 1914
875 -3:00 Brazil BR%sT 1988 Sep 12
876 -3:00 - BRT
877#
878# west Para (PA)
879# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
880Zone America/Santarem -3:38:48 - LMT 1914
881 -4:00 Brazil AM%sT 1988 Sep 12
882 -4:00 - AMT 2008 Jun 24 00:00
883 -3:00 - BRT
884#
885# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
886# Paraiba (PB)
887Zone America/Fortaleza -2:34:00 - LMT 1914
888 -3:00 Brazil BR%sT 1990 Sep 17
889 -3:00 - BRT 1999 Sep 30
890 -3:00 Brazil BR%sT 2000 Oct 22
891 -3:00 - BRT 2001 Sep 13
892 -3:00 Brazil BR%sT 2002 Oct 1
893 -3:00 - BRT
894#
895# Pernambuco (PE) (except Atlantic islands)
896Zone America/Recife -2:19:36 - LMT 1914
897 -3:00 Brazil BR%sT 1990 Sep 17
898 -3:00 - BRT 1999 Sep 30
899 -3:00 Brazil BR%sT 2000 Oct 15
900 -3:00 - BRT 2001 Sep 13
901 -3:00 Brazil BR%sT 2002 Oct 1
902 -3:00 - BRT
903#
904# Tocantins (TO)
905Zone America/Araguaina -3:12:48 - LMT 1914
906 -3:00 Brazil BR%sT 1990 Sep 17
907 -3:00 - BRT 1995 Sep 14
908 -3:00 Brazil BR%sT 2003 Sep 24
909 -3:00 - BRT
910#
911# Alagoas (AL), Sergipe (SE)
912Zone America/Maceio -2:22:52 - LMT 1914
913 -3:00 Brazil BR%sT 1990 Sep 17
914 -3:00 - BRT 1995 Oct 13
915 -3:00 Brazil BR%sT 1996 Sep 4
916 -3:00 - BRT 1999 Sep 30
917 -3:00 Brazil BR%sT 2000 Oct 22
918 -3:00 - BRT 2001 Sep 13
919 -3:00 Brazil BR%sT 2002 Oct 1
920 -3:00 - BRT
921#
922# Bahia (BA)
923# There are too many Salvadors elsewhere, so use America/Bahia instead
924# of America/Salvador.
925Zone America/Bahia -2:34:04 - LMT 1914
926 -3:00 Brazil BR%sT 2003 Sep 24
927 -3:00 - BRT
928#
929# Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
930# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
931# Santa Catarina (SC), Rio Grande do Sul (RS)
932Zone America/Sao_Paulo -3:06:28 - LMT 1914
933 -3:00 Brazil BR%sT 1963 Oct 23 00:00
934 -3:00 1:00 BRST 1964
935 -3:00 Brazil BR%sT
936#
937# Mato Grosso do Sul (MS)
938Zone America/Campo_Grande -3:38:28 - LMT 1914
939 -4:00 Brazil AM%sT
940#
941# Mato Grosso (MT)
942Zone America/Cuiaba -3:44:20 - LMT 1914
943 -4:00 Brazil AM%sT 2003 Sep 24
944 -4:00 - AMT 2004 Oct 1
945 -4:00 Brazil AM%sT
946#
947# Rondonia (RO)
948Zone America/Porto_Velho -4:15:36 - LMT 1914
949 -4:00 Brazil AM%sT 1988 Sep 12
950 -4:00 - AMT
951#
952# Roraima (RR)
953Zone America/Boa_Vista -4:02:40 - LMT 1914
954 -4:00 Brazil AM%sT 1988 Sep 12
955 -4:00 - AMT 1999 Sep 30
956 -4:00 Brazil AM%sT 2000 Oct 15
957 -4:00 - AMT
958#
959# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
960# The great circle line from Tabatinga to Porto Acre divides
961# east from west Amazonas.
962Zone America/Manaus -4:00:04 - LMT 1914
963 -4:00 Brazil AM%sT 1988 Sep 12
964 -4:00 - AMT 1993 Sep 28
965 -4:00 Brazil AM%sT 1994 Sep 22
966 -4:00 - AMT
967#
968# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
969# Eirunepe, Envira, Ipixuna
970Zone America/Eirunepe -4:39:28 - LMT 1914
971 -5:00 Brazil AC%sT 1988 Sep 12
972 -5:00 - ACT 1993 Sep 28
973 -5:00 Brazil AC%sT 1994 Sep 22
974 -5:00 - ACT 2008 Jun 24 00:00
975 -4:00 - AMT
976#
977# Acre (AC)
978Zone America/Rio_Branco -4:31:12 - LMT 1914
979 -5:00 Brazil AC%sT 1988 Sep 12
980 -5:00 - ACT 2008 Jun 24 00:00
981 -4:00 - AMT
982
983# Chile
984
985# From Eduardo Krell (1995-10-19):
986# The law says to switch to DST at midnight [24:00] on the second SATURDAY
987# of October.... The law is the same for March and October.
988# (1998-09-29):
989# Because of the drought this year, the government decided to go into
990# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
991# (unless there's another dry season next year, I guess).
992
993# From Julio I. Pacheco Troncoso (1999-03-18):
994# Because of the same drought, the government decided to end DST later,
995# on April 3, (one-time change).
996
997# From Oscar van Vlijmen (2006-10-08):
998# http://www.horaoficial.cl/cambio.htm
999
1000# From Jesper Norgaard Welen (2006-10-08):
1001# I think that there are some obvious mistakes in the suggested link
1002# from Oscar van Vlijmen,... for instance entry 66 says that GMT-4
1003# ended 1990-09-12 while entry 67 only begins GMT-3 at 1990-09-15
1004# (they should have been 1990-09-15 and 1990-09-16 respectively), but
1005# anyhow it clears up some doubts too.
1006
1007# From Paul Eggert (2006-12-27):
1008# The following data for Chile and America/Santiago are from
1009# <http://www.horaoficial.cl/horaof.htm> (2006-09-20), transcribed by
1010# Jesper Norgaard Welen. The data for Pacific/Easter are from Shanks
1011# & Pottenger, except with DST transitions after 1932 cloned from
1012# America/Santiago. The pre-1980 Pacific/Easter data are dubious,
1013# but we have no other source.
1014
1015# From German Poo-Caaman~o (2008-03-03):
1016# Due to drought, Chile extends Daylight Time in three weeks. This
1017# is one-time change (Saturday 3/29 at 24:00 for America/Santiago
1018# and Saturday 3/29 at 22:00 for Pacific/Easter)
1019# The Supreme Decree is located at
1020# <a href="http://www.shoa.cl/servicios/supremo316.pdf">
1021# http://www.shoa.cl/servicios/supremo316.pdf
1022# </a>
1023# and the instructions for 2008 are located in:
1024# <a href="http://www.horaoficial.cl/cambio.htm">
1025# http://www.horaoficial.cl/cambio.htm
1026# </a>.
1027
1028# From Jose Miguel Garrido (2008-03-05):
1029# ...
1030# You could see the announces of the change on
1031# <a href="http://www.shoa.cl/noticias/2008/04hora/hora.htm">
1032# http://www.shoa.cl/noticias/2008/04hora/hora.htm
1033# </a>.
1034
1035# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1036Rule Chile 1927 1932 - Sep 1 0:00 1:00 S
1037Rule Chile 1928 1932 - Apr 1 0:00 0 -
1038Rule Chile 1942 only - Jun 1 4:00u 0 -
1039Rule Chile 1942 only - Aug 1 5:00u 1:00 S
1040Rule Chile 1946 only - Jul 15 4:00u 1:00 S
1041Rule Chile 1946 only - Sep 1 3:00u 0:00 -
1042Rule Chile 1947 only - Apr 1 4:00u 0 -
1043Rule Chile 1968 only - Nov 3 4:00u 1:00 S
1044Rule Chile 1969 only - Mar 30 3:00u 0 -
1045Rule Chile 1969 only - Nov 23 4:00u 1:00 S
1046Rule Chile 1970 only - Mar 29 3:00u 0 -
1047Rule Chile 1971 only - Mar 14 3:00u 0 -
1048Rule Chile 1970 1972 - Oct Sun>=9 4:00u 1:00 S
1049Rule Chile 1972 1986 - Mar Sun>=9 3:00u 0 -
1050Rule Chile 1973 only - Sep 30 4:00u 1:00 S
1051Rule Chile 1974 1987 - Oct Sun>=9 4:00u 1:00 S
1052Rule Chile 1987 only - Apr 12 3:00u 0 -
1053Rule Chile 1988 1989 - Mar Sun>=9 3:00u 0 -
1054Rule Chile 1988 only - Oct Sun>=1 4:00u 1:00 S
1055Rule Chile 1989 only - Oct Sun>=9 4:00u 1:00 S
1056Rule Chile 1990 only - Mar 18 3:00u 0 -
1057Rule Chile 1990 only - Sep 16 4:00u 1:00 S
1058Rule Chile 1991 1996 - Mar Sun>=9 3:00u 0 -
1059Rule Chile 1991 1997 - Oct Sun>=9 4:00u 1:00 S
1060Rule Chile 1997 only - Mar 30 3:00u 0 -
1061Rule Chile 1998 only - Mar Sun>=9 3:00u 0 -
1062Rule Chile 1998 only - Sep 27 4:00u 1:00 S
1063Rule Chile 1999 only - Apr 4 3:00u 0 -
1064Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
1065Rule Chile 2000 2007 - Mar Sun>=9 3:00u 0 -
1066# N.B.: the end of March 29 in Chile is March 30 in Universal time,
1067# which is used below in specifying the transition.
1068Rule Chile 2008 only - Mar 30 3:00u 0 -
1069Rule Chile 2009 max - Mar Sun>=9 3:00u 0 -
1070# IATA SSIM anomalies: (1992-02) says 1992-03-14;
1071# (1996-09) says 1998-03-08. Ignore these.
1072# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1073Zone America/Santiago -4:42:46 - LMT 1890
1074 -4:42:46 - SMT 1910 # Santiago Mean Time
1075 -5:00 - CLT 1916 Jul 1 # Chile Time
1076 -4:42:46 - SMT 1918 Sep 1 # Santiago Mean Time
1077 -4:00 - CLT 1919 Jul 1 # Chile Time
1078 -4:42:46 - SMT 1927 Sep 1 # Santiago Mean Time
1079 -5:00 Chile CL%sT 1947 May 22 # Chile Time
1080 -4:00 Chile CL%sT
1081Zone Pacific/Easter -7:17:44 - LMT 1890
1082 -7:17:28 - EMT 1932 Sep # Easter Mean Time
1083 -7:00 Chile EAS%sT 1982 Mar 13 21:00 # Easter I Time
1084 -6:00 Chile EAS%sT
1085#
1086# Sala y Gomez Island is like Pacific/Easter.
1087# Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
1088# San Felix, and Antarctic bases, are like America/Santiago.
1089
1090# Colombia
1091# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1092Rule CO 1992 only - May 3 0:00 1:00 S
1093Rule CO 1993 only - Apr 4 0:00 0 -
1094# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1095Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
1096 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
1097 -5:00 CO CO%sT # Colombia Time
1098# Malpelo, Providencia, San Andres
1099# no information; probably like America/Bogota
1100
1101# Curacao
1102#
1103# From Paul Eggert (2006-03-22):
1104# Shanks & Pottenger say that The Bottom and Philipsburg have been at
1105# -4:00 since standard time was introduced on 1912-03-02; and that
1106# Kralendijk and Rincon used Kralendijk Mean Time (-4:33:08) from
1107# 1912-02-02 to 1965-01-01. The former is dubious, since S&P also say
1108# Saba Island has been like Curacao.
1109# This all predates our 1970 cutoff, though.
1110#
1111# By July 2007 Curacao and St Maarten are planned to become
1112# associated states within the Netherlands, much like Aruba;
1113# Bonaire, Saba and St Eustatius would become directly part of the
1114# Netherlands as Kingdom Islands. This won't affect their time zones
1115# though, as far as we know.
1116#
1117# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1118Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
1119 -4:30 - ANT 1965 # Netherlands Antilles Time
1120 -4:00 - AST
1121
1122# Ecuador
1123#
1124# From Paul Eggert (2007-03-04):
1125# Apparently Ecuador had a failed experiment with DST in 1992.
1126# <http://midena.gov.ec/content/view/1261/208/> (2007-02-27) and
1127# <http://www.hoy.com.ec/NoticiaNue.asp?row_id=249856> (2006-11-06) both
1128# talk about "hora Sixto". Leave this alone for now, as we have no data.
1129#
1130# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1131Zone America/Guayaquil -5:19:20 - LMT 1890
1132 -5:14:00 - QMT 1931 # Quito Mean Time
1133 -5:00 - ECT # Ecuador Time
1134Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
1135 -5:00 - ECT 1986
1136 -6:00 - GALT # Galapagos Time
1137
1138# Falklands
1139
1140# From Paul Eggert (2006-03-22):
1141# Between 1990 and 2000 inclusive, Shanks & Pottenger and the IATA agree except
1142# the IATA gives 1996-09-08. Go with Shanks & Pottenger.
1143
1144# From Falkland Islands Government Office, London (2001-01-22)
1145# via Jesper Norgaard:
1146# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
1147# April 2001 and advance one hour to summer time at 2 am on Sunday 2
1148# September. It is anticipated that the clocks will revert back at 2
1149# am on Sunday 21 April 2002 and advance to summer time at 2 am on
1150# Sunday 1 September.
1151
1152# From Rives McDow (2001-02-13):
1153#
1154# I have communicated several times with people there, and the last
1155# time I had communications that was helpful was in 1998. Here is
1156# what was said then:
1157#
1158# "The general rule was that Stanley used daylight saving and the Camp
1159# did not. However for various reasons many people in the Camp have
1160# started to use daylight saving (known locally as 'Stanley Time')
1161# There is no rule as to who uses daylight saving - it is a matter of
1162# personal choice and so it is impossible to draw a map showing who
1163# uses it and who does not. Any list would be out of date as soon as
1164# it was produced. This year daylight saving ended on April 18/19th
1165# and started again on September 12/13th. I do not know what the rule
1166# is, but can find out if you like. We do not change at the same time
1167# as UK or Chile."
1168#
1169# I did have in my notes that the rule was "Second Saturday in Sep at
1170# 0:00 until third Saturday in Apr at 0:00". I think that this does
1171# not agree in some cases with Shanks; is this true?
1172#
1173# Also, there is no mention in the list that some areas in the
1174# Falklands do not use DST. I have found in my communications there
1175# that these areas are on the western half of East Falkland and all of
1176# West Falkland. Stanley is the only place that consistently observes
1177# DST. Again, as in other places in the world, the farmers don't like
1178# it. West Falkland is almost entirely sheep farmers.
1179#
1180# I know one lady there that keeps a list of which farm keeps DST and
1181# which doesn't each year. She runs a shop in Stanley, and says that
1182# the list changes each year. She uses it to communicate to her
1183# customers, catching them when they are home for lunch or dinner.
1184
1185# From Paul Eggert (2001-03-05):
1186# For now, we'll just record the time in Stanley, since we have no
1187# better info.
1188
1189# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1190Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
1191Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
1192Rule Falk 1939 only - Oct 1 0:00 1:00 S
1193Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
1194Rule Falk 1943 only - Jan 1 0:00 0 -
1195Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
1196Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
1197Rule Falk 1984 only - Sep 16 0:00 1:00 S
1198Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
1199Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
1200Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
1201Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
1202# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1203Zone Atlantic/Stanley -3:51:24 - LMT 1890
1204 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
1205 -4:00 Falk FK%sT 1983 May # Falkland Is Time
1206 -3:00 Falk FK%sT 1985 Sep 15
1207 -4:00 Falk FK%sT
1208
1209# French Guiana
1210# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1211Zone America/Cayenne -3:29:20 - LMT 1911 Jul
1212 -4:00 - GFT 1967 Oct # French Guiana Time
1213 -3:00 - GFT
1214
1215# Guyana
1216# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1217Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
1218 -3:45 - GBGT 1966 May 26 # Br Guiana Time
1219 -3:45 - GYT 1975 Jul 31 # Guyana Time
1220 -3:00 - GYT 1991
1221# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
1222 -4:00 - GYT
1223
1224# Paraguay
1225# From Paul Eggert (2006-03-22):
1226# Shanks & Pottenger say that spring transitions are from 01:00 -> 02:00,
1227# and autumn transitions are from 00:00 -> 23:00. Go with pre-1999
1228# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
1229# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1230Rule Para 1975 1988 - Oct 1 0:00 1:00 S
1231Rule Para 1975 1978 - Mar 1 0:00 0 -
1232Rule Para 1979 1991 - Apr 1 0:00 0 -
1233Rule Para 1989 only - Oct 22 0:00 1:00 S
1234Rule Para 1990 only - Oct 1 0:00 1:00 S
1235Rule Para 1991 only - Oct 6 0:00 1:00 S
1236Rule Para 1992 only - Mar 1 0:00 0 -
1237Rule Para 1992 only - Oct 5 0:00 1:00 S
1238Rule Para 1993 only - Mar 31 0:00 0 -
1239Rule Para 1993 1995 - Oct 1 0:00 1:00 S
1240Rule Para 1994 1995 - Feb lastSun 0:00 0 -
1241Rule Para 1996 only - Mar 1 0:00 0 -
1242# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
1243# From Steffen Thorsen (2000-10-02):
1244# I have three independent reports that Paraguay changed to DST this Sunday
1245# (10-01).
1246#
1247# Translated by Gwillim Law (2001-02-27) from
1248# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
1249# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
1250# </a>:
1251# Starting at 0:00 today, the clock will be set forward 60 minutes, in
1252# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
1253# system has been operating for several years. Formerly there was a separate
1254# decree each year; the new law has the same effect, but permanently. Every
1255# year, the time will change on the first Sunday of October; likewise, the
1256# clock will be set back on the first Sunday of March.
1257#
1258Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
1259# IATA SSIM (1997-09) says Mar 1; go with Shanks & Pottenger.
1260Rule Para 1997 only - Feb lastSun 0:00 0 -
1261# Shanks & Pottenger say 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
1262# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
1263Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
1264# From Rives McDow (2002-02-28):
1265# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
1266# dst method to be from the first Sunday in September to the first Sunday in
1267# April.
1268Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
1269Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
1270#
1271# From Jesper Norgaard Welen (2005-01-02):
1272# There are several sources that claim that Paraguay made
1273# a timezone rule change in autumn 2004.
1274# From Steffen Thorsen (2005-01-05):
1275# Decree 1,867 (2004-03-05)
1276# From Carlos Raul Perasso via Jesper Norgaard Welen (2006-10-13)
1277# <http://www.presidencia.gov.py/decretos/D1867.pdf>
1278Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S
1279Rule Para 2005 max - Mar Sun>=8 0:00 0 -
1280
1281# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1282Zone America/Asuncion -3:50:40 - LMT 1890
1283 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
1284 -4:00 - PYT 1972 Oct # Paraguay Time
1285 -3:00 - PYT 1974 Apr
1286 -4:00 Para PY%sT
1287
1288# Peru
1289#
1290# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
1291# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
1292# When we were in Peru in 1985-1986, they apparently switched over
1293# sometime between December 29 and January 3 while we were on the Amazon.
1294#
1295# From Paul Eggert (2006-03-22):
1296# Shanks & Pottenger don't have this transition. Assume 1986 was like 1987.
1297
1298# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1299Rule Peru 1938 only - Jan 1 0:00 1:00 S
1300Rule Peru 1938 only - Apr 1 0:00 0 -
1301Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
1302Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
1303Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
1304Rule Peru 1986 1987 - Apr 1 0:00 0 -
1305Rule Peru 1990 only - Jan 1 0:00 1:00 S
1306Rule Peru 1990 only - Apr 1 0:00 0 -
1307# IATA is ambiguous for 1993/1995; go with Shanks & Pottenger.
1308Rule Peru 1994 only - Jan 1 0:00 1:00 S
1309Rule Peru 1994 only - Apr 1 0:00 0 -
1310# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1311Zone America/Lima -5:08:12 - LMT 1890
1312 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
1313 -5:00 Peru PE%sT # Peru Time
1314
1315# South Georgia
1316# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1317Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
1318 -2:00 - GST # South Georgia Time
1319
1320# South Sandwich Is
1321# uninhabited; scientific personnel have wintered
1322
1323# Suriname
1324# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1325Zone America/Paramaribo -3:40:40 - LMT 1911
1326 -3:40:52 - PMT 1935 # Paramaribo Mean Time
1327 -3:40:36 - PMT 1945 Oct # The capital moved?
1328 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
1329 -3:30 - SRT 1984 Oct # Suriname Time
1330 -3:00 - SRT
1331
1332# Trinidad and Tobago
1333# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1334Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1335 -4:00 - AST
1336
1337# Uruguay
1338# From Paul Eggert (1993-11-18):
1339# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1340# From Shanks & Pottenger:
1341# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1342# Whitman gives 1923 Oct 1; go with Shanks & Pottenger.
1343Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1344Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1345Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1346Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1347# Shanks & Pottenger give 1935 Apr 1 0:00 & 1936 Mar 30 0:00; go with Whitman.
1348Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1349Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1350Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1351# Whitman gives 1937 Oct 3; go with Shanks & Pottenger.
1352Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1353# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1354# and 1943 Apr 13 ``to present time''; go with Shanks & Pottenger.
1355Rule Uruguay 1941 only - Aug 1 0:00 0:30 HS
1356Rule Uruguay 1942 only - Jan 1 0:00 0 -
1357Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1358Rule Uruguay 1943 only - Mar 14 0:00 0 -
1359Rule Uruguay 1959 only - May 24 0:00 1:00 S
1360Rule Uruguay 1959 only - Nov 15 0:00 0 -
1361Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1362Rule Uruguay 1960 only - Mar 6 0:00 0 -
1363Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1364Rule Uruguay 1965 only - Sep 26 0:00 0 -
1365Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1366Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1367Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1368Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1369Rule Uruguay 1972 only - Aug 15 0:00 0 -
1370Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1371Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1372Rule Uruguay 1976 only - Oct 1 0:00 0 -
1373Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1374Rule Uruguay 1978 only - Apr 1 0:00 0 -
1375Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1376Rule Uruguay 1980 only - May 1 0:00 0 -
1377Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1378Rule Uruguay 1988 only - Mar 14 0:00 0 -
1379Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1380Rule Uruguay 1989 only - Mar 12 0:00 0 -
1381Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1382# Shanks & Pottenger say no DST was observed in 1990/1 and 1991/2,
1383# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1384Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1385Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1386Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1387Rule Uruguay 1993 only - Feb 28 0:00 0 -
1388# From Eduardo Cota (2004-09-20):
1389# The uruguayan government has decreed a change in the local time....
1390# http://www.presidencia.gub.uy/decretos/2004091502.htm
1391Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1392# From Steffen Thorsen (2005-03-11):
1393# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1394# save energy ... it was postponed two weeks....
1395# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1396Rule Uruguay 2005 only - Mar 27 2:00 0 -
1397# From Eduardo Cota (2005-09-27):
1398# http://www.presidencia.gub.uy/_Web/decretos/2005/09/CM%20119_09%2009%202005_00001.PDF
1399# This means that from 2005-10-09 at 02:00 local time, until 2006-03-12 at
1400# 02:00 local time, official time in Uruguay will be at GMT -2.
1401Rule Uruguay 2005 only - Oct 9 2:00 1:00 S
1402Rule Uruguay 2006 only - Mar 12 2:00 0 -
1403# From Jesper Norgaard Welen (2006-09-06):
1404# http://www.presidencia.gub.uy/_web/decretos/2006/09/CM%20210_08%2006%202006_00001.PDF
1405Rule Uruguay 2006 max - Oct Sun>=1 2:00 1:00 S
1406Rule Uruguay 2007 max - Mar Sun>=8 2:00 0 -
1407# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1408Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1409 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1410 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1411 -3:00 Uruguay UY%sT
1412
1413# Venezuela
1414#
1415# From John Stainforth (2007-11-28):
1416# ... the change for Venezuela originally expected for 2007-12-31 has
1417# been brought forward to 2007-12-09. The official announcement was
1418# published today in the "Gaceta Oficial de la Republica Bolivariana
1419# de Venezuela, numero 38.819" (official document for all laws or
1420# resolution publication)
1421# http://www.globovision.com/news.php?nid=72208
1422
1423# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1424Zone America/Caracas -4:27:44 - LMT 1890
1425 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1426 -4:30 - VET 1965 # Venezuela Time
1427 -4:00 - VET 2007 Dec 9 03:00
1428 -4:30 - VET