1# @(#)southamerica 7.55
| 1# @(#)southamerica 7.61
|
2
3# This data is by no means authoritative; if you think you know better,
4# go ahead and edit the file (and please send any changes to
5# tz@elsie.nci.nih.gov for general use in the future).
6
| 2
3# This data is by no means authoritative; if you think you know better,
4# go ahead and edit the file (and please send any changes to
5# tz@elsie.nci.nih.gov for general use in the future).
6
|
7# From Paul Eggert <eggert@twinsun.com> (1999-07-07):
| 7# From Paul Eggert (1999-07-07):
|
8# A good source for time zone historical data outside the U.S. is
9# Thomas G. Shanks, The International Atlas (5th edition),
10# San Diego: ACS Publications, Inc. (1999).
11#
12# Gwillim Law writes that a good source
13# for recent time zone data is the International Air Transport
14# Association's Standard Schedules Information Manual (IATA SSIM),
15# published semiannually. Law sent in several helpful summaries
16# of the IATA's data after 1990.
17#
18# Except where otherwise noted, Shanks is the source for entries through 1990,
19# and IATA SSIM is the source for entries after 1990.
20#
21# Earlier editions of these tables used the North American style (e.g. ARST and
22# ARDT for Argentine Standard and Daylight Time), but the following quote
23# suggests that it's better to use European style (e.g. ART and ARST).
24# I suggest the use of _Summer time_ instead of the more cumbersome
25# _daylight-saving time_. _Summer time_ seems to be in general use
26# in Europe and South America.
27# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
28# H L Mencken, _The American Language: Supplement I_ (1960), p 466
29#
30# Earlier editions of these tables also used the North American style
31# for time zones in Brazil, but this was incorrect, as Brazilians say
32# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
33# the railroad sector, writes (1999-07-06):
34# The subject of time zones is currently a matter of discussion/debate in
35# Brazil. Let's say that "the Brasilia time" is considered the
36# "official time" because Brasilia is the capital city.
37# The other three time zones are called "Brasilia time "minus one" or
38# "plus one" or "plus two". As far as I know there is no such
39# name/designation as "Eastern Time" or "Central Time".
40# So I invented the following (English-language) abbreviations for now.
41# Corrections are welcome!
42# std dst
43# -2:00 FNT FNST Fernando de Noronha
44# -3:00 BRT BRST Brasilia
45# -4:00 AMT AMST Amazon
46# -5:00 ACT ACST Acre
47
48###############################################################################
49
50###############################################################################
51
52# Argentina
53
54# From Bob Devine (1988-01-28):
55# Argentina: first Sunday in October to first Sunday in April since 1976.
56# Double Summer time from 1969 to 1974. Switches at midnight.
57
58# From U. S. Naval Observatory (1988-01-199):
59# ARGENTINA 3 H BEHIND UTC
60
| 8# A good source for time zone historical data outside the U.S. is
9# Thomas G. Shanks, The International Atlas (5th edition),
10# San Diego: ACS Publications, Inc. (1999).
11#
12# Gwillim Law writes that a good source
13# for recent time zone data is the International Air Transport
14# Association's Standard Schedules Information Manual (IATA SSIM),
15# published semiannually. Law sent in several helpful summaries
16# of the IATA's data after 1990.
17#
18# Except where otherwise noted, Shanks is the source for entries through 1990,
19# and IATA SSIM is the source for entries after 1990.
20#
21# Earlier editions of these tables used the North American style (e.g. ARST and
22# ARDT for Argentine Standard and Daylight Time), but the following quote
23# suggests that it's better to use European style (e.g. ART and ARST).
24# I suggest the use of _Summer time_ instead of the more cumbersome
25# _daylight-saving time_. _Summer time_ seems to be in general use
26# in Europe and South America.
27# -- E O Cutler, _New York Times_ (1937-02-14), quoted in
28# H L Mencken, _The American Language: Supplement I_ (1960), p 466
29#
30# Earlier editions of these tables also used the North American style
31# for time zones in Brazil, but this was incorrect, as Brazilians say
32# "summer time". Reinaldo Goulart, a Sao Paulo businessman active in
33# the railroad sector, writes (1999-07-06):
34# The subject of time zones is currently a matter of discussion/debate in
35# Brazil. Let's say that "the Brasilia time" is considered the
36# "official time" because Brasilia is the capital city.
37# The other three time zones are called "Brasilia time "minus one" or
38# "plus one" or "plus two". As far as I know there is no such
39# name/designation as "Eastern Time" or "Central Time".
40# So I invented the following (English-language) abbreviations for now.
41# Corrections are welcome!
42# std dst
43# -2:00 FNT FNST Fernando de Noronha
44# -3:00 BRT BRST Brasilia
45# -4:00 AMT AMST Amazon
46# -5:00 ACT ACST Acre
47
48###############################################################################
49
50###############################################################################
51
52# Argentina
53
54# From Bob Devine (1988-01-28):
55# Argentina: first Sunday in October to first Sunday in April since 1976.
56# Double Summer time from 1969 to 1974. Switches at midnight.
57
58# From U. S. Naval Observatory (1988-01-199):
59# ARGENTINA 3 H BEHIND UTC
60
|
61# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26):
| 61# From Hernan G. Otero (1995-06-26):
|
62# I am sending modifications to the Argentine time zone table...
63# AR was chosen because they are the ISO letters that represent Argentina.
64
65# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
66Rule Arg 1930 only - Dec 1 0:00 1:00 S
67Rule Arg 1931 only - Apr 1 0:00 0 -
68Rule Arg 1931 only - Oct 15 0:00 1:00 S
69Rule Arg 1932 1940 - Mar 1 0:00 0 -
70Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
71Rule Arg 1940 only - Jul 1 0:00 1:00 S
72Rule Arg 1941 only - Jun 15 0:00 0 -
73Rule Arg 1941 only - Oct 15 0:00 1:00 S
74Rule Arg 1943 only - Aug 1 0:00 0 -
75Rule Arg 1943 only - Oct 15 0:00 1:00 S
76Rule Arg 1946 only - Mar 1 0:00 0 -
77Rule Arg 1946 only - Oct 1 0:00 1:00 S
78Rule Arg 1963 only - Oct 1 0:00 0 -
79Rule Arg 1963 only - Dec 15 0:00 1:00 S
80Rule Arg 1964 1966 - Mar 1 0:00 0 -
81Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
82Rule Arg 1967 only - Apr 2 0:00 0 -
83Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
84Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
85Rule Arg 1974 only - Jan 23 0:00 1:00 S
86Rule Arg 1974 only - May 1 0:00 0 -
87Rule Arg 1988 only - Dec 1 0:00 1:00 S
88#
| 62# I am sending modifications to the Argentine time zone table...
63# AR was chosen because they are the ISO letters that represent Argentina.
64
65# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
66Rule Arg 1930 only - Dec 1 0:00 1:00 S
67Rule Arg 1931 only - Apr 1 0:00 0 -
68Rule Arg 1931 only - Oct 15 0:00 1:00 S
69Rule Arg 1932 1940 - Mar 1 0:00 0 -
70Rule Arg 1932 1939 - Nov 1 0:00 1:00 S
71Rule Arg 1940 only - Jul 1 0:00 1:00 S
72Rule Arg 1941 only - Jun 15 0:00 0 -
73Rule Arg 1941 only - Oct 15 0:00 1:00 S
74Rule Arg 1943 only - Aug 1 0:00 0 -
75Rule Arg 1943 only - Oct 15 0:00 1:00 S
76Rule Arg 1946 only - Mar 1 0:00 0 -
77Rule Arg 1946 only - Oct 1 0:00 1:00 S
78Rule Arg 1963 only - Oct 1 0:00 0 -
79Rule Arg 1963 only - Dec 15 0:00 1:00 S
80Rule Arg 1964 1966 - Mar 1 0:00 0 -
81Rule Arg 1964 1966 - Oct 15 0:00 1:00 S
82Rule Arg 1967 only - Apr 2 0:00 0 -
83Rule Arg 1967 1968 - Oct Sun>=1 0:00 1:00 S
84Rule Arg 1968 1969 - Apr Sun>=1 0:00 0 -
85Rule Arg 1974 only - Jan 23 0:00 1:00 S
86Rule Arg 1974 only - May 1 0:00 0 -
87Rule Arg 1988 only - Dec 1 0:00 1:00 S
88#
|
89# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26):
| 89# From Hernan G. Otero (1995-06-26):
|
90# These corrections were contributed by InterSoft Argentina S.A.,
91# obtaining the data from the:
92# Talleres de Hidrografia Naval Argentina
93# (Argentine Naval Hydrography Institute)
94#
95# Shanks stops after 1992-03-01; go with Otero.
96Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
97Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
98#
| 90# These corrections were contributed by InterSoft Argentina S.A.,
91# obtaining the data from the:
92# Talleres de Hidrografia Naval Argentina
93# (Argentine Naval Hydrography Institute)
94#
95# Shanks stops after 1992-03-01; go with Otero.
96Rule Arg 1989 1993 - Mar Sun>=1 0:00 0 -
97Rule Arg 1989 1992 - Oct Sun>=15 0:00 1:00 S
98#
|
99# From Hernan G. Otero <hernan@isoft.com.ar> (1995-06-26):
| 99# From Hernan G. Otero (1995-06-26):
|
100# From this moment on, the law that mandated the daylight saving
101# time corrections was derogated and no more modifications
102# to the time zones (for daylight saving) are now made.
103#
104# From Rives McDow (2000-01-10):
105# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
106# which did not result in the switch of a time zone, as they stayed 9 hours
107# from the International Date Line.
108Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
109Rule Arg 2000 only - Mar Sun>=1 0:00 0 -
110#
111# From Peter Gradelski via Steffen Thorsen (2000-03-01):
112# We just checked with our Sao Paulo office and they say the government of
113# Argentina decided not to become one of the countries that go on or off DST.
114# So Buenos Aires should be -3 hours from GMT at all times.
115#
| 100# From this moment on, the law that mandated the daylight saving
101# time corrections was derogated and no more modifications
102# to the time zones (for daylight saving) are now made.
103#
104# From Rives McDow (2000-01-10):
105# On October 3, 1999, 0:00 local, Argentina implemented daylight savings time,
106# which did not result in the switch of a time zone, as they stayed 9 hours
107# from the International Date Line.
108Rule Arg 1999 only - Oct Sun>=1 0:00 1:00 S
109Rule Arg 2000 only - Mar Sun>=1 0:00 0 -
110#
111# From Peter Gradelski via Steffen Thorsen (2000-03-01):
112# We just checked with our Sao Paulo office and they say the government of
113# Argentina decided not to become one of the countries that go on or off DST.
114# So Buenos Aires should be -3 hours from GMT at all times.
115#
|
116# From Fabian L. Arce Jofre <farcejofre@bigfoot.com> (2000-04-04):
| 116# From Fabian L. Arce Jofre (2000-04-04):
|
117# The law that claimed DST for Argentina was derogated by President Fernando
118# de la Rua on March 2, 2000, because it would make people spend more energy
119# in the winter time, rather than less. The change took effect on March 3.
120#
121# From Mariano Absatz (2001-06-06):
122# one of the major newspapers here in Argentina said that the 1999
123# Timezone Law (which never was effectively applied) will (would?) be
124# in effect.... The article is at
125# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
126# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
127# 1999-09-17, and published 1999-09-21. The official publication is at:
128# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
129# Regretfully, you have to subscribe (and pay) for the on-line version....
130#
131# (2001-06-12):
132# the timezone for Argentina will not change next Sunday.
133# Apparently it will do so on Sunday 24th....
134# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
135#
136# (2001-06-25):
137# Last Friday (yes, the last working day before the date of the change), the
138# Senate annulled the 1999 law that introduced the changes later postponed.
139# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
140# It remains the vote of the Deputies..., but it will be the same....
141# This kind of things had always been done this way in Argentina.
142# We are still -03:00 all year round in all of the country.
143#
144# From Mariano Absatz (2004-05-21):
145# Today it was officially published that the Province of Mendoza is changing
146# its timezone this winter... starting tomorrow night....
147# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
148# From Paul Eggert (2004-05-24):
149# It's Law No. 7,210. This change is due to a public power emergency, so for
150# now we'll assume it's for this year only.
151#
152# From Paul Eggert (2002-01-22):
153# <a href="http://www.spicasc.net/horvera.html">
154# Hora de verano para la Republica Argentina (2000-10-01)
155# </a> says that standard time in Argentina from 1894-10-31
156# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
157# over Shanks.
158#
159# From Mariano Absatz (2004-06-05):
160# These media articles from a major newspaper mostly cover the current state:
161# http://www.lanacion.com.ar/04/05/27/de_604825.asp
162# http://www.lanacion.com.ar/04/05/28/de_605203.asp
163#
164# The following eight (8) provinces pulled clocks back to UTC-04:00 at
165# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
166# Apparently, all nine provinces would go back to UTC-03:00 at the same
167# time in October 17th.
168#
169# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
170# Tierra del Fuego, Tucuman.
171#
172# From Mariano Absatz (2004-06-14):
173# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
174# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
175# annoyance with the change is much higher than the power savings obtained....
176#
177# From Gwillim Law (2004-06-14):
178# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
179# "The time change in Tierra del Fuego was a conflicted decision from
180# the start. The government had decreed that the measure would take
181# effect on June 1, but a normative error forced the new time to begin
182# three days earlier, from a Saturday to a Sunday....
183# Our understanding was that the change was originally scheduled to take place
184# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
185# provinces). Sunday was May 30, only two days earlier. So the article
186# contains a contradiction. I would give more credence to the Saturday/Sunday
187# date than the "three days earlier" phrase, and conclude that Tierra del
188# Fuego set its clocks back at 2004-05-30 00:00.
189#
190# From Steffen Thorsen (2004-10-05):
191# The previous law 7210 which changed the province of Mendoza's time zone
192# back in May have been modified slightly in a new law 7277, which set the
193# new end date to 2004-09-26 (original date was 2004-10-17).
194# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
195#
196# From Mariano Absatz (2004-10-05):
197# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
198# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
199# at midnight between Saturday, July 24th and Sunday, July 25th....
200# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
201# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
202# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
203
204# Unless otherwise specified, data are from Shanks through 1992, from
205# the IATA otherwise. As noted below, Shanks says that
206# America/Cordoba split into 6 subregions during 1991/1992, but we
207# haven't verified this yet so for now we'll keep it a single region.
208#
209# Zone NAME GMTOFF RULES FORMAT [UNTIL]
210#
211# Buenos Aires (BA), Capital Federal (CF),
212Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
213 -4:16:48 - CMT 1920 May # Cordoba Mean Time
214 -4:00 - ART 1930 Dec
215 -4:00 Arg AR%sT 1969 Oct 5
216 -3:00 Arg AR%sT 1999 Oct 3
217 -4:00 Arg AR%sT 2000 Mar 3
218 -3:00 - ART
219#
220# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
221# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB),
222# San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
223#
224# Shanks also makes the following claims, which we haven't verified:
225# - Formosa switched to -3:00 on 1991-01-07.
226# - Misiones switched to -3:00 on 1990-12-29.
227# - Chaco switched to -3:00 on 1991-01-04.
228# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15,
229# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01.
230# - Santiago del Estero switched to -4:00 on 1991-04-01,
231# then to -3:00 on 1991-04-26.
232#
233Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
234 -4:16:48 - CMT 1920 May
235 -4:00 - ART 1930 Dec
236 -4:00 Arg AR%sT 1969 Oct 5
237 -3:00 Arg AR%sT 1991 Mar 3
238 -4:00 - WART 1991 Oct 20
239 -3:00 Arg AR%sT 1999 Oct 3
240 -4:00 Arg AR%sT 2000 Mar 3
241 -3:00 - ART
242#
243# Tucuman (TM)
244Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
245 -4:16:48 - CMT 1920 May
246 -4:00 - ART 1930 Dec
247 -4:00 Arg AR%sT 1969 Oct 5
248 -3:00 Arg AR%sT 1991 Mar 3
249 -4:00 - WART 1991 Oct 20
250 -3:00 Arg AR%sT 1999 Oct 3
251 -4:00 Arg AR%sT 2000 Mar 3
252 -3:00 - ART 2004 Jun 1
253 -4:00 - WART 2004 Jun 13
254 -3:00 - ART
255#
256# La Rioja (LR)
257Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
258 -4:16:48 - CMT 1920 May
259 -4:00 - ART 1930 Dec
260 -4:00 Arg AR%sT 1969 Oct 5
261 -3:00 Arg AR%sT 1991 Mar 1
262 -4:00 - WART 1991 May 7
263 -3:00 Arg AR%sT 1999 Oct 3
264 -4:00 Arg AR%sT 2000 Mar 3
265 -3:00 - ART 2004 Jun 1
266 -4:00 - WART 2004 Jun 20
267 -3:00 - ART
268#
269# San Juan (SJ)
270Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
271 -4:16:48 - CMT 1920 May
272 -4:00 - ART 1930 Dec
273 -4:00 Arg AR%sT 1969 Oct 5
274 -3:00 Arg AR%sT 1991 Mar 1
275 -4:00 - WART 1991 May 7
276 -3:00 Arg AR%sT 1999 Oct 3
277 -4:00 Arg AR%sT 2000 Mar 3
278 -3:00 - ART 2004 May 31
279 -4:00 - WART 2004 Jul 25
280 -3:00 - ART
281#
282# Jujuy (JY)
283Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
284 -4:16:48 - CMT 1920 May
285 -4:00 - ART 1930 Dec
286 -4:00 Arg AR%sT 1969 Oct 5
287 -3:00 Arg AR%sT 1990 Mar 4
288 -4:00 - WART 1990 Oct 28
289 -4:00 1:00 WARST 1991 Mar 17
290 -4:00 - WART 1991 Oct 6
291 -3:00 1:00 ARST 1992
292 -3:00 Arg AR%sT 1999 Oct 3
293 -4:00 Arg AR%sT 2000 Mar 3
294 -3:00 - ART
295#
| 117# The law that claimed DST for Argentina was derogated by President Fernando
118# de la Rua on March 2, 2000, because it would make people spend more energy
119# in the winter time, rather than less. The change took effect on March 3.
120#
121# From Mariano Absatz (2001-06-06):
122# one of the major newspapers here in Argentina said that the 1999
123# Timezone Law (which never was effectively applied) will (would?) be
124# in effect.... The article is at
125# http://ar.clarin.com/diario/2001-06-06/e-01701.htm
126# ... The Law itself is "Ley No 25155", sanctioned on 1999-08-25, enacted
127# 1999-09-17, and published 1999-09-21. The official publication is at:
128# http://www.boletin.jus.gov.ar/BON/Primera/1999/09-Septiembre/21/PDF/BO21-09-99LEG.PDF
129# Regretfully, you have to subscribe (and pay) for the on-line version....
130#
131# (2001-06-12):
132# the timezone for Argentina will not change next Sunday.
133# Apparently it will do so on Sunday 24th....
134# http://ar.clarin.com/diario/2001-06-12/s-03501.htm
135#
136# (2001-06-25):
137# Last Friday (yes, the last working day before the date of the change), the
138# Senate annulled the 1999 law that introduced the changes later postponed.
139# http://www.clarin.com.ar/diario/2001-06-22/s-03601.htm
140# It remains the vote of the Deputies..., but it will be the same....
141# This kind of things had always been done this way in Argentina.
142# We are still -03:00 all year round in all of the country.
143#
144# From Mariano Absatz (2004-05-21):
145# Today it was officially published that the Province of Mendoza is changing
146# its timezone this winter... starting tomorrow night....
147# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040521-27158-normas.pdf
148# From Paul Eggert (2004-05-24):
149# It's Law No. 7,210. This change is due to a public power emergency, so for
150# now we'll assume it's for this year only.
151#
152# From Paul Eggert (2002-01-22):
153# <a href="http://www.spicasc.net/horvera.html">
154# Hora de verano para la Republica Argentina (2000-10-01)
155# </a> says that standard time in Argentina from 1894-10-31
156# to 1920-05-01 was -4:16:48.25. Go with this more-precise value
157# over Shanks.
158#
159# From Mariano Absatz (2004-06-05):
160# These media articles from a major newspaper mostly cover the current state:
161# http://www.lanacion.com.ar/04/05/27/de_604825.asp
162# http://www.lanacion.com.ar/04/05/28/de_605203.asp
163#
164# The following eight (8) provinces pulled clocks back to UTC-04:00 at
165# midnight Monday May 31st. (that is, the night between 05/31 and 06/01).
166# Apparently, all nine provinces would go back to UTC-03:00 at the same
167# time in October 17th.
168#
169# Catamarca, Chubut, La Rioja, San Juan, San Luis, Santa Cruz,
170# Tierra del Fuego, Tucuman.
171#
172# From Mariano Absatz (2004-06-14):
173# ... this weekend, the Province of Tucuman decided it'd go back to UTC-03:00
174# yesterday midnight (that is, at 24:00 Saturday 12th), since the people's
175# annoyance with the change is much higher than the power savings obtained....
176#
177# From Gwillim Law (2004-06-14):
178# http://www.lanacion.com.ar/04/06/10/de_609078.asp ...
179# "The time change in Tierra del Fuego was a conflicted decision from
180# the start. The government had decreed that the measure would take
181# effect on June 1, but a normative error forced the new time to begin
182# three days earlier, from a Saturday to a Sunday....
183# Our understanding was that the change was originally scheduled to take place
184# on June 1 at 00:00 in Chubut, Santa Cruz, Tierra del Fuego (and some other
185# provinces). Sunday was May 30, only two days earlier. So the article
186# contains a contradiction. I would give more credence to the Saturday/Sunday
187# date than the "three days earlier" phrase, and conclude that Tierra del
188# Fuego set its clocks back at 2004-05-30 00:00.
189#
190# From Steffen Thorsen (2004-10-05):
191# The previous law 7210 which changed the province of Mendoza's time zone
192# back in May have been modified slightly in a new law 7277, which set the
193# new end date to 2004-09-26 (original date was 2004-10-17).
194# http://www.gobernac.mendoza.gov.ar/boletin/pdf/20040924-27244-normas.pdf
195#
196# From Mariano Absatz (2004-10-05):
197# San Juan changed from UTC-03:00 to UTC-04:00 at midnight between
198# Sunday, May 30th and Monday, May 31st. It changed back to UTC-03:00
199# at midnight between Saturday, July 24th and Sunday, July 25th....
200# http://www.sanjuan.gov.ar/prensa/archivo/000329.html
201# http://www.sanjuan.gov.ar/prensa/archivo/000426.html
202# http://www.sanjuan.gov.ar/prensa/archivo/000441.html
203
204# Unless otherwise specified, data are from Shanks through 1992, from
205# the IATA otherwise. As noted below, Shanks says that
206# America/Cordoba split into 6 subregions during 1991/1992, but we
207# haven't verified this yet so for now we'll keep it a single region.
208#
209# Zone NAME GMTOFF RULES FORMAT [UNTIL]
210#
211# Buenos Aires (BA), Capital Federal (CF),
212Zone America/Argentina/Buenos_Aires -3:53:48 - LMT 1894 Oct 31
213 -4:16:48 - CMT 1920 May # Cordoba Mean Time
214 -4:00 - ART 1930 Dec
215 -4:00 Arg AR%sT 1969 Oct 5
216 -3:00 Arg AR%sT 1999 Oct 3
217 -4:00 Arg AR%sT 2000 Mar 3
218 -3:00 - ART
219#
220# Santa Fe (SF), Entre Rios (ER), Corrientes (CN), Misiones (MN), Chaco (CC),
221# Formosa (FM), Salta (SA), Santiago del Estero (SE), Cordoba (CB),
222# San Luis (SL), La Pampa (LP), Neuquen (NQ), Rio Negro (RN)
223#
224# Shanks also makes the following claims, which we haven't verified:
225# - Formosa switched to -3:00 on 1991-01-07.
226# - Misiones switched to -3:00 on 1990-12-29.
227# - Chaco switched to -3:00 on 1991-01-04.
228# - San Luis switched to -4:00 on 1990-03-14, then to -3:00 on 1990-10-15,
229# then to -4:00 on 1991-03-01, then to -3:00 on 1991-06-01.
230# - Santiago del Estero switched to -4:00 on 1991-04-01,
231# then to -3:00 on 1991-04-26.
232#
233Zone America/Argentina/Cordoba -4:16:48 - LMT 1894 Oct 31
234 -4:16:48 - CMT 1920 May
235 -4:00 - ART 1930 Dec
236 -4:00 Arg AR%sT 1969 Oct 5
237 -3:00 Arg AR%sT 1991 Mar 3
238 -4:00 - WART 1991 Oct 20
239 -3:00 Arg AR%sT 1999 Oct 3
240 -4:00 Arg AR%sT 2000 Mar 3
241 -3:00 - ART
242#
243# Tucuman (TM)
244Zone America/Argentina/Tucuman -4:20:52 - LMT 1894 Oct 31
245 -4:16:48 - CMT 1920 May
246 -4:00 - ART 1930 Dec
247 -4:00 Arg AR%sT 1969 Oct 5
248 -3:00 Arg AR%sT 1991 Mar 3
249 -4:00 - WART 1991 Oct 20
250 -3:00 Arg AR%sT 1999 Oct 3
251 -4:00 Arg AR%sT 2000 Mar 3
252 -3:00 - ART 2004 Jun 1
253 -4:00 - WART 2004 Jun 13
254 -3:00 - ART
255#
256# La Rioja (LR)
257Zone America/Argentina/La_Rioja -4:27:24 - LMT 1894 Oct 31
258 -4:16:48 - CMT 1920 May
259 -4:00 - ART 1930 Dec
260 -4:00 Arg AR%sT 1969 Oct 5
261 -3:00 Arg AR%sT 1991 Mar 1
262 -4:00 - WART 1991 May 7
263 -3:00 Arg AR%sT 1999 Oct 3
264 -4:00 Arg AR%sT 2000 Mar 3
265 -3:00 - ART 2004 Jun 1
266 -4:00 - WART 2004 Jun 20
267 -3:00 - ART
268#
269# San Juan (SJ)
270Zone America/Argentina/San_Juan -4:34:04 - LMT 1894 Oct 31
271 -4:16:48 - CMT 1920 May
272 -4:00 - ART 1930 Dec
273 -4:00 Arg AR%sT 1969 Oct 5
274 -3:00 Arg AR%sT 1991 Mar 1
275 -4:00 - WART 1991 May 7
276 -3:00 Arg AR%sT 1999 Oct 3
277 -4:00 Arg AR%sT 2000 Mar 3
278 -3:00 - ART 2004 May 31
279 -4:00 - WART 2004 Jul 25
280 -3:00 - ART
281#
282# Jujuy (JY)
283Zone America/Argentina/Jujuy -4:21:12 - LMT 1894 Oct 31
284 -4:16:48 - CMT 1920 May
285 -4:00 - ART 1930 Dec
286 -4:00 Arg AR%sT 1969 Oct 5
287 -3:00 Arg AR%sT 1990 Mar 4
288 -4:00 - WART 1990 Oct 28
289 -4:00 1:00 WARST 1991 Mar 17
290 -4:00 - WART 1991 Oct 6
291 -3:00 1:00 ARST 1992
292 -3:00 Arg AR%sT 1999 Oct 3
293 -4:00 Arg AR%sT 2000 Mar 3
294 -3:00 - ART
295#
|
296# Catamarca (CT)
| 296# Catamarca (CT), Chubut (CH)
|
297Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
298 -4:16:48 - CMT 1920 May
299 -4:00 - ART 1930 Dec
300 -4:00 Arg AR%sT 1969 Oct 5
301 -3:00 Arg AR%sT 1991 Mar 3
302 -4:00 - WART 1991 Oct 20
303 -3:00 Arg AR%sT 1999 Oct 3
304 -4:00 Arg AR%sT 2000 Mar 3
305 -3:00 - ART 2004 Jun 1
306 -4:00 - WART 2004 Jun 20
307 -3:00 - ART
308#
309# Mendoza (MZ)
310Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
311 -4:16:48 - CMT 1920 May
312 -4:00 - ART 1930 Dec
313 -4:00 Arg AR%sT 1969 Oct 5
314 -3:00 Arg AR%sT 1990 Mar 4
315 -4:00 - WART 1990 Oct 15
316 -4:00 1:00 WARST 1991 Mar 1
317 -4:00 - WART 1991 Oct 15
318 -4:00 1:00 WARST 1992 Mar 1
319 -4:00 - WART 1992 Oct 18
320 -3:00 Arg AR%sT 1999 Oct 3
321 -4:00 Arg AR%sT 2000 Mar 3
322 -3:00 - ART 2004 May 23
323 -4:00 - WART 2004 Sep 26
324 -3:00 - ART
325#
| 297Zone America/Argentina/Catamarca -4:23:08 - LMT 1894 Oct 31
298 -4:16:48 - CMT 1920 May
299 -4:00 - ART 1930 Dec
300 -4:00 Arg AR%sT 1969 Oct 5
301 -3:00 Arg AR%sT 1991 Mar 3
302 -4:00 - WART 1991 Oct 20
303 -3:00 Arg AR%sT 1999 Oct 3
304 -4:00 Arg AR%sT 2000 Mar 3
305 -3:00 - ART 2004 Jun 1
306 -4:00 - WART 2004 Jun 20
307 -3:00 - ART
308#
309# Mendoza (MZ)
310Zone America/Argentina/Mendoza -4:35:16 - LMT 1894 Oct 31
311 -4:16:48 - CMT 1920 May
312 -4:00 - ART 1930 Dec
313 -4:00 Arg AR%sT 1969 Oct 5
314 -3:00 Arg AR%sT 1990 Mar 4
315 -4:00 - WART 1990 Oct 15
316 -4:00 1:00 WARST 1991 Mar 1
317 -4:00 - WART 1991 Oct 15
318 -4:00 1:00 WARST 1992 Mar 1
319 -4:00 - WART 1992 Oct 18
320 -3:00 Arg AR%sT 1999 Oct 3
321 -4:00 Arg AR%sT 2000 Mar 3
322 -3:00 - ART 2004 May 23
323 -4:00 - WART 2004 Sep 26
324 -3:00 - ART
325#
|
326# Chubut (CH)
327# The name "Comodoro Rivadavia" exceeds the 14-byte POSIX limit.
328Zone America/Argentina/ComodRivadavia -4:30:00 - LMT 1894 Oct 31
329 -4:16:48 - CMT 1920 May
330 -4:00 - ART 1930 Dec
331 -4:00 Arg AR%sT 1969 Oct 5
332 -3:00 Arg AR%sT 1991 Mar 3
333 -4:00 - WART 1991 Oct 20
334 -3:00 Arg AR%sT 1999 Oct 3
335 -4:00 Arg AR%sT 2000 Mar 3
336 -3:00 - ART 2004 Jun 1
337 -4:00 - WART 2004 Jun 20
338 -3:00 - ART
339#
| |
340# Santa Cruz (SC)
341Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
342 -4:16:48 - CMT 1920 May # Cordoba Mean Time
343 -4:00 - ART 1930 Dec
344 -4:00 Arg AR%sT 1969 Oct 5
345 -3:00 Arg AR%sT 1999 Oct 3
346 -4:00 Arg AR%sT 2000 Mar 3
347 -3:00 - ART 2004 Jun 1
348 -4:00 - WART 2004 Jun 20
349 -3:00 - ART
350#
351# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
352Zone America/Argentina/Ushuaia -4:33:12 - LMT 1894 Oct 31
353 -4:16:48 - CMT 1920 May # Cordoba Mean Time
354 -4:00 - ART 1930 Dec
355 -4:00 Arg AR%sT 1969 Oct 5
356 -3:00 Arg AR%sT 1999 Oct 3
357 -4:00 Arg AR%sT 2000 Mar 3
358 -3:00 - ART 2004 May 30
359 -4:00 - WART 2004 Jun 20
360 -3:00 - ART
361
362# Aruba
363# Zone NAME GMTOFF RULES FORMAT [UNTIL]
364Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
365 -4:30 - ANT 1965 # Netherlands Antilles Time
366 -4:00 - AST
367
368# Bolivia
369# Zone NAME GMTOFF RULES FORMAT [UNTIL]
370Zone America/La_Paz -4:32:36 - LMT 1890
371 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
372 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
373 -4:00 - BOT # Bolivia Time
374
375# Brazil
376
| 326# Santa Cruz (SC)
327Zone America/Argentina/Rio_Gallegos -4:36:52 - LMT 1894 Oct 31
328 -4:16:48 - CMT 1920 May # Cordoba Mean Time
329 -4:00 - ART 1930 Dec
330 -4:00 Arg AR%sT 1969 Oct 5
331 -3:00 Arg AR%sT 1999 Oct 3
332 -4:00 Arg AR%sT 2000 Mar 3
333 -3:00 - ART 2004 Jun 1
334 -4:00 - WART 2004 Jun 20
335 -3:00 - ART
336#
337# Tierra del Fuego, Antartida e Islas del Atlantico Sur (TF)
338Zone America/Argentina/Ushuaia -4:33:12 - 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 - ART 2004 May 30
345 -4:00 - WART 2004 Jun 20
346 -3:00 - ART
347
348# Aruba
349# Zone NAME GMTOFF RULES FORMAT [UNTIL]
350Zone America/Aruba -4:40:24 - LMT 1912 Feb 12 # Oranjestad
351 -4:30 - ANT 1965 # Netherlands Antilles Time
352 -4:00 - AST
353
354# Bolivia
355# Zone NAME GMTOFF RULES FORMAT [UNTIL]
356Zone America/La_Paz -4:32:36 - LMT 1890
357 -4:32:36 - CMT 1931 Oct 15 # Calamarca MT
358 -4:32:36 1:00 BOST 1932 Mar 21 # Bolivia ST
359 -4:00 - BOT # Bolivia Time
360
361# Brazil
362
|
377# From Paul Eggert <eggert@twinsun.com> (1993-11-18):
| 363# From Paul Eggert (1993-11-18):
|
378# The mayor of Rio recently attempted to change the time zone rules
379# just in his city, in order to leave more summer time for the tourist trade.
380# The rule change lasted only part of the day;
381# the federal government refused to follow the city's rules, and business
382# was in a chaos, so the mayor backed down that afternoon.
383
384# From IATA SSIM (1996-02):
385# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
386# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
387# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
388# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
389# [The last three states are new to this issue of the IATA SSIM.]
390
391# From Gwillim Law (1996-10-07):
392# Geography, history (Tocantins was part of Goias until 1989), and other
393# sources of time zone information lead me to believe that AL, SE, and TO were
394# always in BR1, and so the only change was whether or not they observed DST....
395# The earliest issue of the SSIM I have is 2/91. Each issue from then until
396# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
397# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
398# (UTC-4).... The other two time zones given for Brazil are BR3, which is
399# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
400# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
401# become part of the state of Pernambuco). The boundary between BR1 and BR2
402# has never been clearly stated. They've simply been called East and West.
403# However, some conclusions can be drawn from another IATA manual: the Airline
404# Coding Directory, which lists close to 400 airports in Brazil. For each
405# airport it gives a time zone which is coded to the SSIM. From that
406# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
407# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
408# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
409
410# From Marcos Tadeu (1998-09-27):
411# <a href="http://pcdsh01.on.br/verao1.html">
412# Brazilian official page
413# </a>
414
415# From Jesper Norgaard (2000-11-03):
416# [For an official list of which regions in Brazil use which time zones, see:]
417# http://pcdsh01.on.br/Fusbr.htm
418# http://pcdsh01.on.br/Fusbrhv.htm
419
420# From Celso Doria via David Madeo (2002-10-09):
421# The reason for the delay this year has to do with elections in Brazil.
422#
423# Unlike in the United States, elections in Brazil are 100% computerized and
424# the results are known almost immediately. Yesterday, it was the first
425# round of the elections when 115 million Brazilians voted for President,
426# Governor, Senators, Federal Deputies, and State Deputies. Nobody is
427# counting (or re-counting) votes anymore and we know there will be a second
428# round for the Presidency and also for some Governors. The 2nd round will
429# take place on October 27th.
430#
431# The reason why the DST will only begin November 3rd is that the thousands
432# of electoral machines used cannot have their time changed, and since the
433# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
434# the Government decided to postpone DST, instead of changing the Constitution
435# (maybe, for the next elections, it will be possible to change the clock)...
436
437# From Rodrigo Severo (2004-10-04):
438# It's just the biannual change made necessary by the much hyped, supposedly
439# modern Brazilian eletronic voting machines which, apparently, can't deal
440# with a time change between the first and the second rounds of the elections.
441
442# From Paul Eggert (2002-10-10):
443# The official decrees referenced below are mostly taken from
444# <a href="http://pcdsh01.on.br/DecHV.html">
445# Decretos sobre o Horario de Verao no Brasil
446# </a> (2001-09-20, in Portuguese).
447# The official site for all decrees, including those not related to time, is
448# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/principal_ano.htm">
449# Presidencia da Republica, Subchefia para Assuntos Juridicos, Decretos
450# </a> (in Portuguese).
451
452# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
453# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
454# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
455Rule Brazil 1931 only - Oct 3 11:00 1:00 S
456Rule Brazil 1932 1933 - Apr 1 0:00 0 -
457Rule Brazil 1932 only - Oct 3 0:00 1:00 S
458# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
459# revoked DST.
460# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
461# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
462Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
463Rule Brazil 1950 only - Apr 16 1:00 0 -
464Rule Brazil 1951 1952 - Apr 1 0:00 0 -
465# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
466Rule Brazil 1953 only - Mar 1 0:00 0 -
467# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
468# revoked DST.
469# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
470# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
471# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
472# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
473# extended the above decree to all of the national territory on 12-09.
474Rule Brazil 1963 only - Dec 9 0:00 1:00 S
475# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
476# extended summer time by one day to 1964-03-01 00:00 (start of school).
477Rule Brazil 1964 only - Mar 1 0:00 0 -
478# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
479Rule Brazil 1965 only - Jan 31 0:00 1:00 S
480Rule Brazil 1965 only - Mar 31 0:00 0 -
481# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
482Rule Brazil 1965 only - Dec 1 0:00 1:00 S
483# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
484Rule Brazil 1966 1968 - Mar 1 0:00 0 -
485Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
486# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
487# revoked DST.
488# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
489Rule Brazil 1985 only - Nov 2 0:00 1:00 S
490# Decree 92,310 (1986-01-21)
491# Decree 92,463 (1986-03-13)
492Rule Brazil 1986 only - Mar 15 0:00 0 -
493# Decree 93,316 (1986-10-01)
494Rule Brazil 1986 only - Oct 25 0:00 1:00 S
495Rule Brazil 1987 only - Feb 14 0:00 0 -
496# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
497Rule Brazil 1987 only - Oct 25 0:00 1:00 S
498Rule Brazil 1988 only - Feb 7 0:00 0 -
499# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
500# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
501Rule Brazil 1988 only - Oct 16 0:00 1:00 S
502Rule Brazil 1989 only - Jan 29 0:00 0 -
503# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
504# with the same exceptions
505Rule Brazil 1989 only - Oct 15 0:00 1:00 S
506Rule Brazil 1990 only - Feb 11 0:00 0 -
507# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
508# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
509# Decree 99,629 (1990-10-19) adds BA, MT.
510Rule Brazil 1990 only - Oct 21 0:00 1:00 S
511Rule Brazil 1991 only - Feb 17 0:00 0 -
512# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
513# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
514Rule Brazil 1991 only - Oct 20 0:00 1:00 S
515Rule Brazil 1992 only - Feb 9 0:00 0 -
516# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
517# adopted by same states.
518Rule Brazil 1992 only - Oct 25 0:00 1:00 S
519Rule Brazil 1993 only - Jan 31 0:00 0 -
520# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
521# adopted by same states, plus AM.
522# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
523# web page corrected 2004-01-07) adopted by same states, minus AM.
524# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
525# adopted by same states, plus MT and TO.
526# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
527# adds AL, SE.
528Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
529Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
530Rule Brazil 1996 only - Feb 11 0:00 0 -
531# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
532# adopted by same states, minus AL, SE.
533Rule Brazil 1996 only - Oct 6 0:00 1:00 S
534Rule Brazil 1997 only - Feb 16 0:00 0 -
| 364# The mayor of Rio recently attempted to change the time zone rules
365# just in his city, in order to leave more summer time for the tourist trade.
366# The rule change lasted only part of the day;
367# the federal government refused to follow the city's rules, and business
368# was in a chaos, so the mayor backed down that afternoon.
369
370# From IATA SSIM (1996-02):
371# _Only_ the following states in BR1 observe DST: Rio Grande do Sul (RS),
372# Santa Catarina (SC), Parana (PR), Sao Paulo (SP), Rio de Janeiro (RJ),
373# Espirito Santo (ES), Minas Gerais (MG), Bahia (BA), Goias (GO),
374# Distrito Federal (DF), Tocantins (TO), Sergipe [SE] and Alagoas [AL].
375# [The last three states are new to this issue of the IATA SSIM.]
376
377# From Gwillim Law (1996-10-07):
378# Geography, history (Tocantins was part of Goias until 1989), and other
379# sources of time zone information lead me to believe that AL, SE, and TO were
380# always in BR1, and so the only change was whether or not they observed DST....
381# The earliest issue of the SSIM I have is 2/91. Each issue from then until
382# 9/95 says that DST is observed only in the ten states I quoted from 9/95,
383# along with Mato Grosso (MT) and Mato Grosso do Sul (MS), which are in BR2
384# (UTC-4).... The other two time zones given for Brazil are BR3, which is
385# UTC-5, no DST, and applies only in the state of Acre (AC); and BR4, which is
386# UTC-2, and applies to Fernando de Noronha (formerly FN, but I believe it's
387# become part of the state of Pernambuco). The boundary between BR1 and BR2
388# has never been clearly stated. They've simply been called East and West.
389# However, some conclusions can be drawn from another IATA manual: the Airline
390# Coding Directory, which lists close to 400 airports in Brazil. For each
391# airport it gives a time zone which is coded to the SSIM. From that
392# information, I'm led to conclude that the states of Amapa (AP), Ceara (CE),
393# Maranhao (MA), Paraiba (PR), Pernambuco (PE), Piaui (PI), and Rio Grande do
394# Norte (RN), and the eastern part of Para (PA) are all in BR1 without DST.
395
396# From Marcos Tadeu (1998-09-27):
397# <a href="http://pcdsh01.on.br/verao1.html">
398# Brazilian official page
399# </a>
400
401# From Jesper Norgaard (2000-11-03):
402# [For an official list of which regions in Brazil use which time zones, see:]
403# http://pcdsh01.on.br/Fusbr.htm
404# http://pcdsh01.on.br/Fusbrhv.htm
405
406# From Celso Doria via David Madeo (2002-10-09):
407# The reason for the delay this year has to do with elections in Brazil.
408#
409# Unlike in the United States, elections in Brazil are 100% computerized and
410# the results are known almost immediately. Yesterday, it was the first
411# round of the elections when 115 million Brazilians voted for President,
412# Governor, Senators, Federal Deputies, and State Deputies. Nobody is
413# counting (or re-counting) votes anymore and we know there will be a second
414# round for the Presidency and also for some Governors. The 2nd round will
415# take place on October 27th.
416#
417# The reason why the DST will only begin November 3rd is that the thousands
418# of electoral machines used cannot have their time changed, and since the
419# Constitution says the elections must begin at 8:00 AM and end at 5:00 PM,
420# the Government decided to postpone DST, instead of changing the Constitution
421# (maybe, for the next elections, it will be possible to change the clock)...
422
423# From Rodrigo Severo (2004-10-04):
424# It's just the biannual change made necessary by the much hyped, supposedly
425# modern Brazilian eletronic voting machines which, apparently, can't deal
426# with a time change between the first and the second rounds of the elections.
427
428# From Paul Eggert (2002-10-10):
429# The official decrees referenced below are mostly taken from
430# <a href="http://pcdsh01.on.br/DecHV.html">
431# Decretos sobre o Horario de Verao no Brasil
432# </a> (2001-09-20, in Portuguese).
433# The official site for all decrees, including those not related to time, is
434# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/principal_ano.htm">
435# Presidencia da Republica, Subchefia para Assuntos Juridicos, Decretos
436# </a> (in Portuguese).
437
438# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
439# Decree <a href="http://pcdsh01.on.br/HV20466.htm">20,466</a> (1931-10-01)
440# Decree <a href="http://pcdsh01.on.br/HV21896.htm">21,896</a> (1932-01-10)
441Rule Brazil 1931 only - Oct 3 11:00 1:00 S
442Rule Brazil 1932 1933 - Apr 1 0:00 0 -
443Rule Brazil 1932 only - Oct 3 0:00 1:00 S
444# Decree <a href="http://pcdsh01.on.br/HV23195.htm">23,195</a> (1933-10-10)
445# revoked DST.
446# Decree <a href="http://pcdsh01.on.br/HV27496.htm">27,496</a> (1949-11-24)
447# Decree <a href="http://pcdsh01.on.br/HV27998.htm">27,998</a> (1950-04-13)
448Rule Brazil 1949 1952 - Dec 1 0:00 1:00 S
449Rule Brazil 1950 only - Apr 16 1:00 0 -
450Rule Brazil 1951 1952 - Apr 1 0:00 0 -
451# Decree <a href="http://pcdsh01.on.br/HV32308.htm">32,308</a> (1953-02-24)
452Rule Brazil 1953 only - Mar 1 0:00 0 -
453# Decree <a href="http://pcdsh01.on.br/HV34724.htm">34,724</a> (1953-11-30)
454# revoked DST.
455# Decree <a href="http://pcdsh01.on.br/HV52700.htm">52,700</a> (1963-10-18)
456# established DST from 1963-10-23 00:00 to 1964-02-29 00:00
457# in SP, RJ, GB, MG, ES, due to the prolongation of the drought.
458# Decree <a href="http://pcdsh01.on.br/HV53071.htm">53,071</a> (1963-12-03)
459# extended the above decree to all of the national territory on 12-09.
460Rule Brazil 1963 only - Dec 9 0:00 1:00 S
461# Decree <a href="http://pcdsh01.on.br/HV53604.htm">53,604</a> (1964-02-25)
462# extended summer time by one day to 1964-03-01 00:00 (start of school).
463Rule Brazil 1964 only - Mar 1 0:00 0 -
464# Decree <a href="http://pcdsh01.on.br/HV55639.htm">55,639</a> (1965-01-27)
465Rule Brazil 1965 only - Jan 31 0:00 1:00 S
466Rule Brazil 1965 only - Mar 31 0:00 0 -
467# Decree <a href="http://pcdsh01.on.br/HV57303.htm">57,303</a> (1965-11-22)
468Rule Brazil 1965 only - Dec 1 0:00 1:00 S
469# Decree <a href="http://pcdsh01.on.br/HV57843.htm">57,843</a> (1966-02-18)
470Rule Brazil 1966 1968 - Mar 1 0:00 0 -
471Rule Brazil 1966 1967 - Nov 1 0:00 1:00 S
472# Decree <a href="http://pcdsh01.on.br/HV63429.htm">63,429</a> (1968-10-15)
473# revoked DST.
474# Decree <a href="http://pcdsh01.on.br/HV91698.htm">91,698</a> (1985-09-27)
475Rule Brazil 1985 only - Nov 2 0:00 1:00 S
476# Decree 92,310 (1986-01-21)
477# Decree 92,463 (1986-03-13)
478Rule Brazil 1986 only - Mar 15 0:00 0 -
479# Decree 93,316 (1986-10-01)
480Rule Brazil 1986 only - Oct 25 0:00 1:00 S
481Rule Brazil 1987 only - Feb 14 0:00 0 -
482# Decree <a href="http://pcdsh01.on.br/HV94922.htm">94,922</a> (1987-09-22)
483Rule Brazil 1987 only - Oct 25 0:00 1:00 S
484Rule Brazil 1988 only - Feb 7 0:00 0 -
485# Decree <a href="http://pcdsh01.on.br/HV96676.htm">96,676</a> (1988-09-12)
486# except for the states of AC, AM, PA, RR, RO, and AP (then a territory)
487Rule Brazil 1988 only - Oct 16 0:00 1:00 S
488Rule Brazil 1989 only - Jan 29 0:00 0 -
489# Decree <a href="http://pcdsh01.on.br/HV98077.htm">98,077</a> (1989-08-21)
490# with the same exceptions
491Rule Brazil 1989 only - Oct 15 0:00 1:00 S
492Rule Brazil 1990 only - Feb 11 0:00 0 -
493# Decree <a href="http://pcdsh01.on.br/HV99530.htm">99,530</a> (1990-09-17)
494# adopted by RS, SC, PR, SP, RJ, ES, MG, GO, MS, DF.
495# Decree 99,629 (1990-10-19) adds BA, MT.
496Rule Brazil 1990 only - Oct 21 0:00 1:00 S
497Rule Brazil 1991 only - Feb 17 0:00 0 -
498# <a href="http://pcdsh01.on.br/HV1991.htm">Unnumbered decree</a> (1991-09-25)
499# adopted by RS, SC, PR, SP, RJ, ES, MG, BA, GO, MT, MS, DF.
500Rule Brazil 1991 only - Oct 20 0:00 1:00 S
501Rule Brazil 1992 only - Feb 9 0:00 0 -
502# <a href="http://pcdsh01.on.br/HV1992.htm">Unnumbered decree</a> (1992-10-16)
503# adopted by same states.
504Rule Brazil 1992 only - Oct 25 0:00 1:00 S
505Rule Brazil 1993 only - Jan 31 0:00 0 -
506# Decree <a href="http://pcdsh01.on.br/HV942.htm">942</a> (1993-09-28)
507# adopted by same states, plus AM.
508# Decree <a href="http://pcdsh01.on.br/HV1252.htm">1,252</a> (1994-09-22;
509# web page corrected 2004-01-07) adopted by same states, minus AM.
510# Decree <a href="http://pcdsh01.on.br/HV1636.htm">1,636</a> (1995-09-14)
511# adopted by same states, plus MT and TO.
512# Decree <a href="http://pcdsh01.on.br/HV1674.htm">1,674</a> (1995-10-13)
513# adds AL, SE.
514Rule Brazil 1993 1995 - Oct Sun>=11 0:00 1:00 S
515Rule Brazil 1994 1995 - Feb Sun>=15 0:00 0 -
516Rule Brazil 1996 only - Feb 11 0:00 0 -
517# Decree <a href="http://pcdsh01.on.br/HV2000.htm">2,000</a> (1996-09-04)
518# adopted by same states, minus AL, SE.
519Rule Brazil 1996 only - Oct 6 0:00 1:00 S
520Rule Brazil 1997 only - Feb 16 0:00 0 -
|
535# From Daniel C. Sobral <dcs@gns.com.br> (1998-02-12):
| 521# From Daniel C. Sobral (1998-02-12):
|
536# In 1997, the DS began on October 6. The stated reason was that
537# because international television networks ignored Brazil's policy on DS,
538# they bought the wrong times on satellite for coverage of Pope's visit.
539# This year, the ending date of DS was postponed to March 1
540# to help dealing with the shortages of electric power.
541#
542# From Paul Eggert (1998-02-25):
543# <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm">
544# Brazil Prepares for Papal Visit
545# </a>,
546# Church Net UK (1997-10-02).
547#
548# Decree 2,317 (1997-09-04), adopted by same states.
549Rule Brazil 1997 only - Oct 6 0:00 1:00 S
550# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
551# (1998-02-10)
552Rule Brazil 1998 only - Mar 1 0:00 0 -
553# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
554# adopted by the same states as before.
555Rule Brazil 1998 only - Oct 11 0:00 1:00 S
556Rule Brazil 1999 only - Feb 21 0:00 0 -
557# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
558# (1999-08-23) adopted by same states.
559# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
560# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
561Rule Brazil 1999 only - Oct 3 0:00 1:00 S
562Rule Brazil 2000 only - Feb 27 0:00 0 -
563# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
564# adopted by the same states as before.
565# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
566# repeals DST in PE and RR, effective 2000-10-15 00:00.
567# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
568# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
569# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
570# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
571Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
572Rule Brazil 2001 max - Feb Sun>=15 0:00 0 -
573# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
574# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a>
575Rule Brazil 2002 only - Nov 3 0:00 1:00 S
576# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
577# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a>
578Rule Brazil 2003 only - Oct 19 0:00 1:00 S
579# Decree 5,223 (2004-10-01) reestablishes DST in MT.
580# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a>
581Rule Brazil 2004 only - Nov 2 0:00 1:00 S
582# The latest ruleset listed above says that the following states observe DST:
583# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
584#
585Rule Brazil 2005 max - Oct Sun>=15 0:00 1:00 S
586# For dates after mid-2005, the above rules with TO="max" are guesses
587# and are quite possibly wrong, but are more likely than no DST at all.
588
589
590# Zone NAME GMTOFF RULES FORMAT [UNTIL]
591#
592# Fernando de Noronha (administratively part of PE)
593Zone America/Noronha -2:09:40 - LMT 1914
594 -2:00 Brazil FN%sT 1990 Sep 17
595 -2:00 - FNT 1999 Sep 30
596 -2:00 Brazil FN%sT 2000 Oct 15
597 -2:00 - FNT 2001 Sep 13
598 -2:00 Brazil FN%sT 2002 Oct 1
599 -2:00 - FNT
600# Other Atlantic islands have no permanent settlement.
601# These include Trindade and Martin Vaz (administratively part of ES),
602# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
603# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
604# it also included the Penedos.
605#
606# Amapa (AP), east Para (PA)
607# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
608# The division between east and west Para is the river Xingu.
609# In the north a very small part from the river Javary (now Jari I guess,
610# the border with Amapa) to the Amazon, then to the Xingu.
611Zone America/Belem -3:13:56 - LMT 1914
612 -3:00 Brazil BR%sT 1988 Sep 12
613 -3:00 - BRT
614#
615# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
616# Paraiba (PB)
617Zone America/Fortaleza -2:34:00 - LMT 1914
618 -3:00 Brazil BR%sT 1990 Sep 17
619 -3:00 - BRT 1999 Sep 30
620 -3:00 Brazil BR%sT 2000 Oct 22
621 -3:00 - BRT 2001 Sep 13
622 -3:00 Brazil BR%sT 2002 Oct 1
623 -3:00 - BRT
624#
625# Pernambuco (PE) (except Atlantic islands)
626Zone America/Recife -2:19:36 - LMT 1914
627 -3:00 Brazil BR%sT 1990 Sep 17
628 -3:00 - BRT 1999 Sep 30
629 -3:00 Brazil BR%sT 2000 Oct 15
630 -3:00 - BRT 2001 Sep 13
631 -3:00 Brazil BR%sT 2002 Oct 1
632 -3:00 - BRT
633#
634# Tocantins (TO)
635Zone America/Araguaina -3:12:48 - LMT 1914
636 -3:00 Brazil BR%sT 1990 Sep 17
637 -3:00 - BRT 1995 Sep 14
638 -3:00 Brazil BR%sT 2003 Sep 24
639 -3:00 - BRT
640#
641# Alagoas (AL), Sergipe (SE)
642Zone America/Maceio -2:22:52 - LMT 1914
643 -3:00 Brazil BR%sT 1990 Sep 17
644 -3:00 - BRT 1995 Oct 13
645 -3:00 Brazil BR%sT 1996 Sep 4
646 -3:00 - BRT 1999 Sep 30
647 -3:00 Brazil BR%sT 2000 Oct 22
648 -3:00 - BRT 2001 Sep 13
649 -3:00 Brazil BR%sT 2002 Oct 1
650 -3:00 - BRT
651#
652# Bahia (BA)
653# There are too many Salvadors elsewhere, so use America/Bahia instead
654# of America/Salvador.
655Zone America/Bahia -2:34:04 - LMT 1914
656 -3:00 Brazil BR%sT 2003 Sep 24
657 -3:00 - BRT
658#
659# Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
660# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
661# Santa Catarina (SC), Rio Grande do Sul (RS)
662Zone America/Sao_Paulo -3:06:28 - LMT 1914
663 -3:00 Brazil BR%sT 1963 Oct 23 00:00
664 -3:00 1:00 BRST 1964
665 -3:00 Brazil BR%sT
666#
667# Mato Grosso do Sul (MS)
668Zone America/Campo_Grande -3:38:28 - LMT 1914
669 -4:00 Brazil AM%sT
670#
671# Mato Grosso (MT)
672Zone America/Cuiaba -3:44:20 - LMT 1914
673 -4:00 Brazil AM%sT 2003 Sep 24
674 -4:00 - AMT 2004 Oct 1
675 -4:00 Brazil AM%sT
676#
677# west Para (PA), Rondonia (RO)
678# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
679Zone America/Porto_Velho -4:15:36 - LMT 1914
680 -4:00 Brazil AM%sT 1988 Sep 12
681 -4:00 - AMT
682#
683# Roraima (RR)
684Zone America/Boa_Vista -4:02:40 - LMT 1914
685 -4:00 Brazil AM%sT 1988 Sep 12
686 -4:00 - AMT 1999 Sep 30
687 -4:00 Brazil AM%sT 2000 Oct 15
688 -4:00 - AMT
689#
690# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
691# The great circle line from Tabatinga to Porto Acre divides
692# east from west Amazonas.
693Zone America/Manaus -4:00:04 - LMT 1914
694 -4:00 Brazil AM%sT 1988 Sep 12
695 -4:00 - AMT 1993 Sep 28
696 -4:00 Brazil AM%sT 1994 Sep 22
697 -4:00 - AMT
698#
699# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
700# Eirunepe, Envira, Ipixuna
701Zone America/Eirunepe -4:39:28 - LMT 1914
702 -5:00 Brazil AC%sT 1988 Sep 12
703 -5:00 - ACT 1993 Sep 28
704 -5:00 Brazil AC%sT 1994 Sep 22
705 -5:00 - ACT
706#
707# Acre (AC)
708Zone America/Rio_Branco -4:31:12 - LMT 1914
709 -5:00 Brazil AC%sT 1988 Sep 12
710 -5:00 - ACT
711
712
713# Chile
714
715# From Eduardo Krell (1995-10-19):
716# The law says to switch to DST at midnight [24:00] on the second SATURDAY
717# of October.... The law is the same for March and October.
718# (1998-09-29):
719# Because of the drought this year, the government decided to go into
720# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
721# (unless there's another dry season next year, I guess).
722
723# From Julio I. Pacheco Troncoso (1999-03-18):
724# Because of the same drought, the government decided to end DST later,
725# on April 3, (one-time change).
726
727# From Gwillim Law (2001-05-04):
728# I came across another article in "La Tercera" about Chilean DST.
729# <http://www.tercera.cl/diario/2000/10/13/t-extras.html>
730# It clearly confirms my earlier suggestion, that DST begins at 22:00
731# on Easter Island.... But it also seems to be saying that the
732# observance of DST in Chile began in 1966, rather than 1969 as
733# ... [Shanks] has it....
734#
735# My translation:
736#
737# "The Chilean Army has announced that summer time will begin tomorrow,
738# Saturday, October 14 in continental Chile, insular Chile, and
739# Antarctica, as provided by Supreme Decree 25 of January 11, 1966.
740# By the preceding, official time in continental Chile and Chilean
741# Antarctic, and official time in Western Insular Chile, which applies
742# to Easter Island and Sala y Gomez Island, will be set forward at
743# midnight and at 22:00, respectively, by 20 minutes."
744
745# From Paul Eggert (2001-05-04):
746# Go with this article in preference to Shanks's 1969 date for modern DST.
747# Assume this rule has been used since DST was introduced in the islands.
748
749# From Paul Eggert (2002-10-24):
750# <http://www.shoa.cl/shoa/faqhoraoficial.htm> gives many details that
751# disagree with the following table, but we haven't had time to compare them.
752
753# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
754Rule Chile 1918 only - Sep 1 0:00 1:00 S
755Rule Chile 1919 only - Jul 2 0:00 0 -
756Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
757Rule Chile 1928 1932 - Apr 1 0:00 0 -
758Rule Chile 1966 1997 - Oct Sun>=9 4:00u 1:00 S
759Rule Chile 1967 1998 - Mar Sun>=9 3:00u 0 -
760Rule Chile 1998 only - Sep 27 4:00u 1:00 S
761Rule Chile 1999 only - Apr 4 3:00u 0 -
762Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
763Rule Chile 2000 max - Mar Sun>=9 3:00u 0 -
764# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14;
765# (1996-09) says 1998-03-08. Ignore these.
766# Zone NAME GMTOFF RULES FORMAT [UNTIL]
767Zone America/Santiago -4:42:40 - LMT 1890
768 -4:42:40 - SMT 1910 # Santiago Mean Time
769 -5:00 Chile CL%sT 1932 Sep # Chile Time
770 -4:00 Chile CL%sT
771Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri
772 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time
773 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time
774 -6:00 Chile EAS%sT
775#
776# Sala y Gomez Island is like Pacific/Easter.
777# Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
778# San Felix, and Antarctic bases, are like America/Santiago.
779
780# Colombia
781# Shanks specifies 24:00 for 1992 transition times; go with IATA,
782# as it seems implausible to change clocks at midnight New Year's Eve.
783# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
784Rule CO 1992 only - May 2 0:00 1:00 S
785Rule CO 1992 only - Dec 31 0:00 0 -
786# Zone NAME GMTOFF RULES FORMAT [UNTIL]
787Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
788 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
789 -5:00 CO CO%sT # Colombia Time
790# Malpelo, Providencia, San Andres
791# no information; probably like America/Bogota
792
793# Curacao
794# Shanks says that Bottom and Oranjestad have been at -4:00 since
795# standard time was introduced on 1912-03-02; and that Kralendijk and Rincon
796# used Kralendijk Mean Time (-4:33:08) from 1912-02-02 to 1965-01-01.
797# This all predates our 1970 cutoff, though.
798# Zone NAME GMTOFF RULES FORMAT [UNTIL]
799Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
800 -4:30 - ANT 1965 # Netherlands Antilles Time
801 -4:00 - AST
802
803# Ecuador
804# Zone NAME GMTOFF RULES FORMAT [UNTIL]
805Zone America/Guayaquil -5:19:20 - LMT 1890
806 -5:14:00 - QMT 1931 # Quito Mean Time
807 -5:00 - ECT # Ecuador Time
808Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
809 -5:00 - ECT 1986
810 -6:00 - GALT # Galapagos Time
811
812# Falklands
813
814# From Paul Eggert (2001-03-05):
815# Between 1990 and 2000 inclusive, Shanks and the IATA agree except
816# the IATA gives 1996-09-08. Go with Shanks.
817
818# From Falkland Islands Government Office, London (2001-01-22)
819# via Jesper Norgaard:
820# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
821# April 2001 and advance one hour to summer time at 2 am on Sunday 2
822# September. It is anticipated that the clocks will revert back at 2
823# am on Sunday 21 April 2002 and advance to summer time at 2 am on
824# Sunday 1 September.
825
826# From Rives McDow (2001-02-13):
827#
828# I have communicated several times with people there, and the last
829# time I had communications that was helpful was in 1998. Here is
830# what was said then:
831#
832# "The general rule was that Stanley used daylight saving and the Camp
833# did not. However for various reasons many people in the Camp have
834# started to use daylight saving (known locally as 'Stanley Time')
835# There is no rule as to who uses daylight saving - it is a matter of
836# personal choice and so it is impossible to draw a map showing who
837# uses it and who does not. Any list would be out of date as soon as
838# it was produced. This year daylight saving ended on April 18/19th
839# and started again on September 12/13th. I do not know what the rule
840# is, but can find out if you like. We do not change at the same time
841# as UK or Chile."
842#
843# I did have in my notes that the rule was "Second Saturday in Sep at
844# 0:00 until third Saturday in Apr at 0:00". I think that this does
845# not agree in some cases with Shanks; is this true?
846#
847# Also, there is no mention in the list that some areas in the
848# Falklands do not use DST. I have found in my communications there
849# that these areas are on the western half of East Falkland and all of
850# West Falkland. Stanley is the only place that consistently observes
851# DST. Again, as in other places in the world, the farmers don't like
852# it. West Falkland is almost entirely sheep farmers.
853#
854# I know one lady there that keeps a list of which farm keeps DST and
855# which doesn't each year. She runs a shop in Stanley, and says that
856# the list changes each year. She uses it to communicate to her
857# customers, catching them when they are home for lunch or dinner.
858
859# From Paul Eggert (2001-03-05):
860# For now, we'll just record the time in Stanley, since we have no
861# better info.
862
863# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
864Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
865Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
866Rule Falk 1939 only - Oct 1 0:00 1:00 S
867Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
868Rule Falk 1943 only - Jan 1 0:00 0 -
869Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
870Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
871Rule Falk 1984 only - Sep 16 0:00 1:00 S
872Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
873Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
874Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
875Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
876# Zone NAME GMTOFF RULES FORMAT [UNTIL]
877Zone Atlantic/Stanley -3:51:24 - LMT 1890
878 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
879 -4:00 Falk FK%sT 1983 May # Falkland Is Time
880 -3:00 Falk FK%sT 1985 Sep 15
881 -4:00 Falk FK%sT
882
883# French Guiana
884# Zone NAME GMTOFF RULES FORMAT [UNTIL]
885Zone America/Cayenne -3:29:20 - LMT 1911 Jul
886 -4:00 - GFT 1967 Oct # French Guiana Time
887 -3:00 - GFT
888
889# Guyana
890# Zone NAME GMTOFF RULES FORMAT [UNTIL]
891Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
892 -3:45 - GBGT 1966 May 26 # Br Guiana Time
893 -3:45 - GYT 1975 Jul 31 # Guyana Time
894 -3:00 - GYT 1991
895# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
896 -4:00 - GYT
897
898# Paraguay
899# From Paul Eggert (1999-10-29):
900# Shanks (1999) says that spring transitions are from 01:00 -> 02:00,
901# and autumn transitions are from 00:00 -> 23:00. Go with earlier
902# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
903# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
904Rule Para 1975 1988 - Oct 1 0:00 1:00 S
905Rule Para 1975 1978 - Mar 1 0:00 0 -
906Rule Para 1979 1991 - Apr 1 0:00 0 -
907Rule Para 1989 only - Oct 22 0:00 1:00 S
908Rule Para 1990 only - Oct 1 0:00 1:00 S
909Rule Para 1991 only - Oct 6 0:00 1:00 S
910Rule Para 1992 only - Mar 1 0:00 0 -
911Rule Para 1992 only - Oct 5 0:00 1:00 S
912Rule Para 1993 only - Mar 31 0:00 0 -
913Rule Para 1993 1995 - Oct 1 0:00 1:00 S
914Rule Para 1994 1995 - Feb lastSun 0:00 0 -
915Rule Para 1996 only - Mar 1 0:00 0 -
916# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
917# From Steffen Thorsen (2000-10-02):
918# I have three independent reports that Paraguay changed to DST this Sunday
919# (10-01).
920#
921# Translated by Gwillim Law (2001-02-27) from
922# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
923# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
924# </a>:
925# Starting at 0:00 today, the clock will be set forward 60 minutes, in
926# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
927# system has been operating for several years. Formerly there was a separate
928# decree each year; the new law has the same effect, but permanently. Every
929# year, the time will change on the first Sunday of October; likewise, the
930# clock will be set back on the first Sunday of March.
931#
932# From Jesper Norgaard (2001-03-06) [an official URL saying similar things]:
933# http://gateway.abc.com.py:8000/pub/pag04.mbr/artic?FHA=2001-03-03-02.24.52.900592
934#
935Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
936# IATA SSIM (1997-09) says Mar 1; go with Shanks.
937Rule Para 1997 only - Feb lastSun 0:00 0 -
938# Shanks says 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
939# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
940Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
941# From Rives McDow (2002-02-28):
942# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
943# dst method to be from the first Sunday in September to the first Sunday in
944# April.
| 522# In 1997, the DS began on October 6. The stated reason was that
523# because international television networks ignored Brazil's policy on DS,
524# they bought the wrong times on satellite for coverage of Pope's visit.
525# This year, the ending date of DS was postponed to March 1
526# to help dealing with the shortages of electric power.
527#
528# From Paul Eggert (1998-02-25):
529# <a href="http://churchnet.ucsm.ac.uk/news/files2/news165.htm">
530# Brazil Prepares for Papal Visit
531# </a>,
532# Church Net UK (1997-10-02).
533#
534# Decree 2,317 (1997-09-04), adopted by same states.
535Rule Brazil 1997 only - Oct 6 0:00 1:00 S
536# Decree <a href="http://pcdsh01.on.br/figuras/HV2495.JPG">2,495</a>
537# (1998-02-10)
538Rule Brazil 1998 only - Mar 1 0:00 0 -
539# Decree <a href="http://pcdsh01.on.br/figuras/Hv98.jpg">2,780</a> (1998-09-11)
540# adopted by the same states as before.
541Rule Brazil 1998 only - Oct 11 0:00 1:00 S
542Rule Brazil 1999 only - Feb 21 0:00 0 -
543# Decree <a href="http://pcdsh01.on.br/figuras/HV3150.gif">3,150</a>
544# (1999-08-23) adopted by same states.
545# Decree <a href="http://pcdsh01.on.br/DecHV99.gif">3,188</a> (1999-09-30)
546# adds SE, AL, PB, PE, RN, CE, PI, MA and RR.
547Rule Brazil 1999 only - Oct 3 0:00 1:00 S
548Rule Brazil 2000 only - Feb 27 0:00 0 -
549# Decree <a href="http://pcdsh01.on.br/DEC3592.htm">3,592</a> (2000-09-06)
550# adopted by the same states as before.
551# Decree <a href="http://pcdsh01.on.br/Dec3630.jpg">3,630</a> (2000-10-13)
552# repeals DST in PE and RR, effective 2000-10-15 00:00.
553# Decree <a href="http://pcdsh01.on.br/Dec3632.jpg">3,632</a> (2000-10-17)
554# repeals DST in SE, AL, PB, RN, CE, PI and MA, effective 2000-10-22 00:00.
555# Decree <a href="http://pcdsh01.on.br/figuras/HV3916.gif">3,916</a>
556# (2001-09-13) reestablishes DST in AL, CE, MA, PB, PE, PI, RN, SE.
557Rule Brazil 2000 2001 - Oct Sun>=8 0:00 1:00 S
558Rule Brazil 2001 max - Feb Sun>=15 0:00 0 -
559# Decree 4,399 (2002-10-01) repeals DST in AL, CE, MA, PB, PE, PI, RN, SE.
560# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2002/D4399.htm"></a>
561Rule Brazil 2002 only - Nov 3 0:00 1:00 S
562# Decree 4,844 (2003-09-24; corrected 2003-09-26) repeals DST in BA, MT, TO.
563# <a href="http://www.presidencia.gov.br/CCIVIL/decreto/2003/D4844.htm"></a>
564Rule Brazil 2003 only - Oct 19 0:00 1:00 S
565# Decree 5,223 (2004-10-01) reestablishes DST in MT.
566# <a href="http://www.planalto.gov.br/ccivil_03/_Ato2004-2006/2004/Decreto/D5223.htm"></a>
567Rule Brazil 2004 only - Nov 2 0:00 1:00 S
568# The latest ruleset listed above says that the following states observe DST:
569# DF, ES, GO, MG, MS, MT, PR, RJ, RS, SC, SP.
570#
571Rule Brazil 2005 max - Oct Sun>=15 0:00 1:00 S
572# For dates after mid-2005, the above rules with TO="max" are guesses
573# and are quite possibly wrong, but are more likely than no DST at all.
574
575
576# Zone NAME GMTOFF RULES FORMAT [UNTIL]
577#
578# Fernando de Noronha (administratively part of PE)
579Zone America/Noronha -2:09:40 - LMT 1914
580 -2:00 Brazil FN%sT 1990 Sep 17
581 -2:00 - FNT 1999 Sep 30
582 -2:00 Brazil FN%sT 2000 Oct 15
583 -2:00 - FNT 2001 Sep 13
584 -2:00 Brazil FN%sT 2002 Oct 1
585 -2:00 - FNT
586# Other Atlantic islands have no permanent settlement.
587# These include Trindade and Martin Vaz (administratively part of ES),
588# Atol das Rocas (RN), and Penedos de Sao Pedro e Sao Paulo (PE).
589# Fernando de Noronha was a separate territory from 1942-09-02 to 1989-01-01;
590# it also included the Penedos.
591#
592# Amapa (AP), east Para (PA)
593# East Para includes Belem, Maraba, Serra Norte, and Sao Felix do Xingu.
594# The division between east and west Para is the river Xingu.
595# In the north a very small part from the river Javary (now Jari I guess,
596# the border with Amapa) to the Amazon, then to the Xingu.
597Zone America/Belem -3:13:56 - LMT 1914
598 -3:00 Brazil BR%sT 1988 Sep 12
599 -3:00 - BRT
600#
601# Maranhao (MA), Piaui (PI), Ceara (CE), Rio Grande do Norte (RN),
602# Paraiba (PB)
603Zone America/Fortaleza -2:34:00 - LMT 1914
604 -3:00 Brazil BR%sT 1990 Sep 17
605 -3:00 - BRT 1999 Sep 30
606 -3:00 Brazil BR%sT 2000 Oct 22
607 -3:00 - BRT 2001 Sep 13
608 -3:00 Brazil BR%sT 2002 Oct 1
609 -3:00 - BRT
610#
611# Pernambuco (PE) (except Atlantic islands)
612Zone America/Recife -2:19:36 - LMT 1914
613 -3:00 Brazil BR%sT 1990 Sep 17
614 -3:00 - BRT 1999 Sep 30
615 -3:00 Brazil BR%sT 2000 Oct 15
616 -3:00 - BRT 2001 Sep 13
617 -3:00 Brazil BR%sT 2002 Oct 1
618 -3:00 - BRT
619#
620# Tocantins (TO)
621Zone America/Araguaina -3:12:48 - LMT 1914
622 -3:00 Brazil BR%sT 1990 Sep 17
623 -3:00 - BRT 1995 Sep 14
624 -3:00 Brazil BR%sT 2003 Sep 24
625 -3:00 - BRT
626#
627# Alagoas (AL), Sergipe (SE)
628Zone America/Maceio -2:22:52 - LMT 1914
629 -3:00 Brazil BR%sT 1990 Sep 17
630 -3:00 - BRT 1995 Oct 13
631 -3:00 Brazil BR%sT 1996 Sep 4
632 -3:00 - BRT 1999 Sep 30
633 -3:00 Brazil BR%sT 2000 Oct 22
634 -3:00 - BRT 2001 Sep 13
635 -3:00 Brazil BR%sT 2002 Oct 1
636 -3:00 - BRT
637#
638# Bahia (BA)
639# There are too many Salvadors elsewhere, so use America/Bahia instead
640# of America/Salvador.
641Zone America/Bahia -2:34:04 - LMT 1914
642 -3:00 Brazil BR%sT 2003 Sep 24
643 -3:00 - BRT
644#
645# Goias (GO), Distrito Federal (DF), Minas Gerais (MG),
646# Espirito Santo (ES), Rio de Janeiro (RJ), Sao Paulo (SP), Parana (PR),
647# Santa Catarina (SC), Rio Grande do Sul (RS)
648Zone America/Sao_Paulo -3:06:28 - LMT 1914
649 -3:00 Brazil BR%sT 1963 Oct 23 00:00
650 -3:00 1:00 BRST 1964
651 -3:00 Brazil BR%sT
652#
653# Mato Grosso do Sul (MS)
654Zone America/Campo_Grande -3:38:28 - LMT 1914
655 -4:00 Brazil AM%sT
656#
657# Mato Grosso (MT)
658Zone America/Cuiaba -3:44:20 - LMT 1914
659 -4:00 Brazil AM%sT 2003 Sep 24
660 -4:00 - AMT 2004 Oct 1
661 -4:00 Brazil AM%sT
662#
663# west Para (PA), Rondonia (RO)
664# West Para includes Altamira, Oribidos, Prainha, Oriximina, and Santarem.
665Zone America/Porto_Velho -4:15:36 - LMT 1914
666 -4:00 Brazil AM%sT 1988 Sep 12
667 -4:00 - AMT
668#
669# Roraima (RR)
670Zone America/Boa_Vista -4:02:40 - LMT 1914
671 -4:00 Brazil AM%sT 1988 Sep 12
672 -4:00 - AMT 1999 Sep 30
673 -4:00 Brazil AM%sT 2000 Oct 15
674 -4:00 - AMT
675#
676# east Amazonas (AM): Boca do Acre, Jutai, Manaus, Floriano Peixoto
677# The great circle line from Tabatinga to Porto Acre divides
678# east from west Amazonas.
679Zone America/Manaus -4:00:04 - LMT 1914
680 -4:00 Brazil AM%sT 1988 Sep 12
681 -4:00 - AMT 1993 Sep 28
682 -4:00 Brazil AM%sT 1994 Sep 22
683 -4:00 - AMT
684#
685# west Amazonas (AM): Atalaia do Norte, Boca do Maoco, Benjamin Constant,
686# Eirunepe, Envira, Ipixuna
687Zone America/Eirunepe -4:39:28 - LMT 1914
688 -5:00 Brazil AC%sT 1988 Sep 12
689 -5:00 - ACT 1993 Sep 28
690 -5:00 Brazil AC%sT 1994 Sep 22
691 -5:00 - ACT
692#
693# Acre (AC)
694Zone America/Rio_Branco -4:31:12 - LMT 1914
695 -5:00 Brazil AC%sT 1988 Sep 12
696 -5:00 - ACT
697
698
699# Chile
700
701# From Eduardo Krell (1995-10-19):
702# The law says to switch to DST at midnight [24:00] on the second SATURDAY
703# of October.... The law is the same for March and October.
704# (1998-09-29):
705# Because of the drought this year, the government decided to go into
706# DST earlier (saturday 9/26 at 24:00). This is a one-time change only ...
707# (unless there's another dry season next year, I guess).
708
709# From Julio I. Pacheco Troncoso (1999-03-18):
710# Because of the same drought, the government decided to end DST later,
711# on April 3, (one-time change).
712
713# From Gwillim Law (2001-05-04):
714# I came across another article in "La Tercera" about Chilean DST.
715# <http://www.tercera.cl/diario/2000/10/13/t-extras.html>
716# It clearly confirms my earlier suggestion, that DST begins at 22:00
717# on Easter Island.... But it also seems to be saying that the
718# observance of DST in Chile began in 1966, rather than 1969 as
719# ... [Shanks] has it....
720#
721# My translation:
722#
723# "The Chilean Army has announced that summer time will begin tomorrow,
724# Saturday, October 14 in continental Chile, insular Chile, and
725# Antarctica, as provided by Supreme Decree 25 of January 11, 1966.
726# By the preceding, official time in continental Chile and Chilean
727# Antarctic, and official time in Western Insular Chile, which applies
728# to Easter Island and Sala y Gomez Island, will be set forward at
729# midnight and at 22:00, respectively, by 20 minutes."
730
731# From Paul Eggert (2001-05-04):
732# Go with this article in preference to Shanks's 1969 date for modern DST.
733# Assume this rule has been used since DST was introduced in the islands.
734
735# From Paul Eggert (2002-10-24):
736# <http://www.shoa.cl/shoa/faqhoraoficial.htm> gives many details that
737# disagree with the following table, but we haven't had time to compare them.
738
739# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
740Rule Chile 1918 only - Sep 1 0:00 1:00 S
741Rule Chile 1919 only - Jul 2 0:00 0 -
742Rule Chile 1927 1931 - Sep 1 0:00 1:00 S
743Rule Chile 1928 1932 - Apr 1 0:00 0 -
744Rule Chile 1966 1997 - Oct Sun>=9 4:00u 1:00 S
745Rule Chile 1967 1998 - Mar Sun>=9 3:00u 0 -
746Rule Chile 1998 only - Sep 27 4:00u 1:00 S
747Rule Chile 1999 only - Apr 4 3:00u 0 -
748Rule Chile 1999 max - Oct Sun>=9 4:00u 1:00 S
749Rule Chile 2000 max - Mar Sun>=9 3:00u 0 -
750# IATA SSIM anomalies: (1990-09) says 1990-09-16; (1992-02) says 1992-03-14;
751# (1996-09) says 1998-03-08. Ignore these.
752# Zone NAME GMTOFF RULES FORMAT [UNTIL]
753Zone America/Santiago -4:42:40 - LMT 1890
754 -4:42:40 - SMT 1910 # Santiago Mean Time
755 -5:00 Chile CL%sT 1932 Sep # Chile Time
756 -4:00 Chile CL%sT
757Zone Pacific/Easter -7:17:28 - LMT 1890 # Mataveri
758 -7:17:28 - MMT 1932 Sep # Mataveri Mean Time
759 -7:00 Chile EAS%sT 1982 Mar 14 # Easter I Time
760 -6:00 Chile EAS%sT
761#
762# Sala y Gomez Island is like Pacific/Easter.
763# Other Chilean locations, including Juan Fernandez Is, San Ambrosio,
764# San Felix, and Antarctic bases, are like America/Santiago.
765
766# Colombia
767# Shanks specifies 24:00 for 1992 transition times; go with IATA,
768# as it seems implausible to change clocks at midnight New Year's Eve.
769# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
770Rule CO 1992 only - May 2 0:00 1:00 S
771Rule CO 1992 only - Dec 31 0:00 0 -
772# Zone NAME GMTOFF RULES FORMAT [UNTIL]
773Zone America/Bogota -4:56:20 - LMT 1884 Mar 13
774 -4:56:20 - BMT 1914 Nov 23 # Bogota Mean Time
775 -5:00 CO CO%sT # Colombia Time
776# Malpelo, Providencia, San Andres
777# no information; probably like America/Bogota
778
779# Curacao
780# Shanks says that Bottom and Oranjestad have been at -4:00 since
781# standard time was introduced on 1912-03-02; and that Kralendijk and Rincon
782# used Kralendijk Mean Time (-4:33:08) from 1912-02-02 to 1965-01-01.
783# This all predates our 1970 cutoff, though.
784# Zone NAME GMTOFF RULES FORMAT [UNTIL]
785Zone America/Curacao -4:35:44 - LMT 1912 Feb 12 # Willemstad
786 -4:30 - ANT 1965 # Netherlands Antilles Time
787 -4:00 - AST
788
789# Ecuador
790# Zone NAME GMTOFF RULES FORMAT [UNTIL]
791Zone America/Guayaquil -5:19:20 - LMT 1890
792 -5:14:00 - QMT 1931 # Quito Mean Time
793 -5:00 - ECT # Ecuador Time
794Zone Pacific/Galapagos -5:58:24 - LMT 1931 # Puerto Baquerizo Moreno
795 -5:00 - ECT 1986
796 -6:00 - GALT # Galapagos Time
797
798# Falklands
799
800# From Paul Eggert (2001-03-05):
801# Between 1990 and 2000 inclusive, Shanks and the IATA agree except
802# the IATA gives 1996-09-08. Go with Shanks.
803
804# From Falkland Islands Government Office, London (2001-01-22)
805# via Jesper Norgaard:
806# ... the clocks revert back to Local Mean Time at 2 am on Sunday 15
807# April 2001 and advance one hour to summer time at 2 am on Sunday 2
808# September. It is anticipated that the clocks will revert back at 2
809# am on Sunday 21 April 2002 and advance to summer time at 2 am on
810# Sunday 1 September.
811
812# From Rives McDow (2001-02-13):
813#
814# I have communicated several times with people there, and the last
815# time I had communications that was helpful was in 1998. Here is
816# what was said then:
817#
818# "The general rule was that Stanley used daylight saving and the Camp
819# did not. However for various reasons many people in the Camp have
820# started to use daylight saving (known locally as 'Stanley Time')
821# There is no rule as to who uses daylight saving - it is a matter of
822# personal choice and so it is impossible to draw a map showing who
823# uses it and who does not. Any list would be out of date as soon as
824# it was produced. This year daylight saving ended on April 18/19th
825# and started again on September 12/13th. I do not know what the rule
826# is, but can find out if you like. We do not change at the same time
827# as UK or Chile."
828#
829# I did have in my notes that the rule was "Second Saturday in Sep at
830# 0:00 until third Saturday in Apr at 0:00". I think that this does
831# not agree in some cases with Shanks; is this true?
832#
833# Also, there is no mention in the list that some areas in the
834# Falklands do not use DST. I have found in my communications there
835# that these areas are on the western half of East Falkland and all of
836# West Falkland. Stanley is the only place that consistently observes
837# DST. Again, as in other places in the world, the farmers don't like
838# it. West Falkland is almost entirely sheep farmers.
839#
840# I know one lady there that keeps a list of which farm keeps DST and
841# which doesn't each year. She runs a shop in Stanley, and says that
842# the list changes each year. She uses it to communicate to her
843# customers, catching them when they are home for lunch or dinner.
844
845# From Paul Eggert (2001-03-05):
846# For now, we'll just record the time in Stanley, since we have no
847# better info.
848
849# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
850Rule Falk 1937 1938 - Sep lastSun 0:00 1:00 S
851Rule Falk 1938 1942 - Mar Sun>=19 0:00 0 -
852Rule Falk 1939 only - Oct 1 0:00 1:00 S
853Rule Falk 1940 1942 - Sep lastSun 0:00 1:00 S
854Rule Falk 1943 only - Jan 1 0:00 0 -
855Rule Falk 1983 only - Sep lastSun 0:00 1:00 S
856Rule Falk 1984 1985 - Apr lastSun 0:00 0 -
857Rule Falk 1984 only - Sep 16 0:00 1:00 S
858Rule Falk 1985 2000 - Sep Sun>=9 0:00 1:00 S
859Rule Falk 1986 2000 - Apr Sun>=16 0:00 0 -
860Rule Falk 2001 max - Apr Sun>=15 2:00 0 -
861Rule Falk 2001 max - Sep Sun>=1 2:00 1:00 S
862# Zone NAME GMTOFF RULES FORMAT [UNTIL]
863Zone Atlantic/Stanley -3:51:24 - LMT 1890
864 -3:51:24 - SMT 1912 Mar 12 # Stanley Mean Time
865 -4:00 Falk FK%sT 1983 May # Falkland Is Time
866 -3:00 Falk FK%sT 1985 Sep 15
867 -4:00 Falk FK%sT
868
869# French Guiana
870# Zone NAME GMTOFF RULES FORMAT [UNTIL]
871Zone America/Cayenne -3:29:20 - LMT 1911 Jul
872 -4:00 - GFT 1967 Oct # French Guiana Time
873 -3:00 - GFT
874
875# Guyana
876# Zone NAME GMTOFF RULES FORMAT [UNTIL]
877Zone America/Guyana -3:52:40 - LMT 1915 Mar # Georgetown
878 -3:45 - GBGT 1966 May 26 # Br Guiana Time
879 -3:45 - GYT 1975 Jul 31 # Guyana Time
880 -3:00 - GYT 1991
881# IATA SSIM (1996-06) says -4:00. Assume a 1991 switch.
882 -4:00 - GYT
883
884# Paraguay
885# From Paul Eggert (1999-10-29):
886# Shanks (1999) says that spring transitions are from 01:00 -> 02:00,
887# and autumn transitions are from 00:00 -> 23:00. Go with earlier
888# editions of Shanks, and with the IATA, who say transitions occur at 00:00.
889# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
890Rule Para 1975 1988 - Oct 1 0:00 1:00 S
891Rule Para 1975 1978 - Mar 1 0:00 0 -
892Rule Para 1979 1991 - Apr 1 0:00 0 -
893Rule Para 1989 only - Oct 22 0:00 1:00 S
894Rule Para 1990 only - Oct 1 0:00 1:00 S
895Rule Para 1991 only - Oct 6 0:00 1:00 S
896Rule Para 1992 only - Mar 1 0:00 0 -
897Rule Para 1992 only - Oct 5 0:00 1:00 S
898Rule Para 1993 only - Mar 31 0:00 0 -
899Rule Para 1993 1995 - Oct 1 0:00 1:00 S
900Rule Para 1994 1995 - Feb lastSun 0:00 0 -
901Rule Para 1996 only - Mar 1 0:00 0 -
902# IATA SSIM (2000-02) says 1999-10-10; ignore this for now.
903# From Steffen Thorsen (2000-10-02):
904# I have three independent reports that Paraguay changed to DST this Sunday
905# (10-01).
906#
907# Translated by Gwillim Law (2001-02-27) from
908# <a href="http://www.diarionoticias.com.py/011000/nacional/naciona1.htm">
909# Noticias, a daily paper in Asuncion, Paraguay (2000-10-01)
910# </a>:
911# Starting at 0:00 today, the clock will be set forward 60 minutes, in
912# fulfillment of Decree No. 7,273 of the Executive Power.... The time change
913# system has been operating for several years. Formerly there was a separate
914# decree each year; the new law has the same effect, but permanently. Every
915# year, the time will change on the first Sunday of October; likewise, the
916# clock will be set back on the first Sunday of March.
917#
918# From Jesper Norgaard (2001-03-06) [an official URL saying similar things]:
919# http://gateway.abc.com.py:8000/pub/pag04.mbr/artic?FHA=2001-03-03-02.24.52.900592
920#
921Rule Para 1996 2001 - Oct Sun>=1 0:00 1:00 S
922# IATA SSIM (1997-09) says Mar 1; go with Shanks.
923Rule Para 1997 only - Feb lastSun 0:00 0 -
924# Shanks says 1999-02-28; IATA SSIM (1999-02) says 1999-02-27, but
925# (1999-09) reports no date; go with above sources and Gerd Knops (2001-02-27).
926Rule Para 1998 2001 - Mar Sun>=1 0:00 0 -
927# From Rives McDow (2002-02-28):
928# A decree was issued in Paraguay (no. 16350) on 2002-02-26 that changed the
929# dst method to be from the first Sunday in September to the first Sunday in
930# April.
|
945Rule Para 2002 max - Apr Sun>=1 0:00 0 -
946Rule Para 2002 max - Sep Sun>=1 0:00 1:00 S
| 931Rule Para 2002 2004 - Apr Sun>=1 0:00 0 -
932Rule Para 2002 2003 - Sep Sun>=1 0:00 1:00 S
933#
934# From Jesper Norgaard Welen (2005-01-02):
935# There are several sources that claim that Paraguay made
936# a timezone rule change in autumn 2004.
937# From Steffen Thorsen (2005-01-05):
938# Decree 1,867 (2004-03-05) <http://www.labor.com.py/noticias.asp?id=27>
939Rule Para 2004 max - Oct Sun>=15 0:00 1:00 S
940Rule Para 2005 max - Mar Sun>=8 0:00 0 -
|
947
| 941
|
948
| |
949# Zone NAME GMTOFF RULES FORMAT [UNTIL]
950Zone America/Asuncion -3:50:40 - LMT 1890
951 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
952 -4:00 - PYT 1972 Oct # Paraguay Time
953 -3:00 - PYT 1974 Apr
954 -4:00 Para PY%sT
955
956# Peru
957#
958# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
959# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
| 942# Zone NAME GMTOFF RULES FORMAT [UNTIL]
943Zone America/Asuncion -3:50:40 - LMT 1890
944 -3:50:40 - AMT 1931 Oct 10 # Asuncion Mean Time
945 -4:00 - PYT 1972 Oct # Paraguay Time
946 -3:00 - PYT 1974 Apr
947 -4:00 Para PY%sT
948
949# Peru
950#
951# <a href="news:xrGmb.39935$gA1.13896113@news4.srv.hcvlny.cv.net">
952# From Evelyn C. Leeper via Mark Brader (2003-10-26):</a>
|
960# When we were in Peru in 1985-1986, they apparently switched over
| 953# When we were in Peru in 1985-1986, they apparently switched over
|
961# sometime between December 29 and January 3 while we were on the Amazon.
962#
963# From Paul Eggert (2003-11-02):
964# Shanks doesn't have this transition. Assume 1986 was like 1987.
965
966# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
967Rule Peru 1938 only - Jan 1 0:00 1:00 S
968Rule Peru 1938 only - Apr 1 0:00 0 -
969Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
970Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
971Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
972Rule Peru 1986 1987 - Apr 1 0:00 0 -
973Rule Peru 1990 only - Jan 1 0:00 1:00 S
974Rule Peru 1990 only - Apr 1 0:00 0 -
975# IATA is ambiguous for 1993/1995; go with Shanks.
976Rule Peru 1994 only - Jan 1 0:00 1:00 S
977Rule Peru 1994 only - Apr 1 0:00 0 -
978# Zone NAME GMTOFF RULES FORMAT [UNTIL]
979Zone America/Lima -5:08:12 - LMT 1890
980 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
981 -5:00 Peru PE%sT # Peru Time
982
983# South Georgia
984# Zone NAME GMTOFF RULES FORMAT [UNTIL]
985Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
986 -2:00 - GST # South Georgia Time
987
988# South Sandwich Is
989# uninhabited; scientific personnel have wintered
990
991# Suriname
992# Zone NAME GMTOFF RULES FORMAT [UNTIL]
993Zone America/Paramaribo -3:40:40 - LMT 1911
994 -3:40:52 - PMT 1935 # Paramaribo Mean Time
995 -3:40:36 - PMT 1945 Oct # The capital moved?
996 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
997 -3:30 - SRT 1984 Oct # Suriname Time
998 -3:00 - SRT
999
1000# Trinidad and Tobago
1001# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1002Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
1003 -4:00 - AST
1004
1005# Uruguay
| 954# sometime between December 29 and January 3 while we were on the Amazon.
955#
956# From Paul Eggert (2003-11-02):
957# Shanks doesn't have this transition. Assume 1986 was like 1987.
958
959# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
960Rule Peru 1938 only - Jan 1 0:00 1:00 S
961Rule Peru 1938 only - Apr 1 0:00 0 -
962Rule Peru 1938 1939 - Sep lastSun 0:00 1:00 S
963Rule Peru 1939 1940 - Mar Sun>=24 0:00 0 -
964Rule Peru 1986 1987 - Jan 1 0:00 1:00 S
965Rule Peru 1986 1987 - Apr 1 0:00 0 -
966Rule Peru 1990 only - Jan 1 0:00 1:00 S
967Rule Peru 1990 only - Apr 1 0:00 0 -
968# IATA is ambiguous for 1993/1995; go with Shanks.
969Rule Peru 1994 only - Jan 1 0:00 1:00 S
970Rule Peru 1994 only - Apr 1 0:00 0 -
971# Zone NAME GMTOFF RULES FORMAT [UNTIL]
972Zone America/Lima -5:08:12 - LMT 1890
973 -5:08:36 - LMT 1908 Jul 28 # Lima Mean Time?
974 -5:00 Peru PE%sT # Peru Time
975
976# South Georgia
977# Zone NAME GMTOFF RULES FORMAT [UNTIL]
978Zone Atlantic/South_Georgia -2:26:08 - LMT 1890 # Grytviken
979 -2:00 - GST # South Georgia Time
980
981# South Sandwich Is
982# uninhabited; scientific personnel have wintered
983
984# Suriname
985# Zone NAME GMTOFF RULES FORMAT [UNTIL]
986Zone America/Paramaribo -3:40:40 - LMT 1911
987 -3:40:52 - PMT 1935 # Paramaribo Mean Time
988 -3:40:36 - PMT 1945 Oct # The capital moved?
989 -3:30 - NEGT 1975 Nov 20 # Dutch Guiana Time
990 -3:30 - SRT 1984 Oct # Suriname Time
991 -3:00 - SRT
992
993# Trinidad and Tobago
994# Zone NAME GMTOFF RULES FORMAT [UNTIL]
995Zone America/Port_of_Spain -4:06:04 - LMT 1912 Mar 2
996 -4:00 - AST
997
998# Uruguay
|
1006# From Paul Eggert <eggert@twinsun.com> (1993-11-18):
| 999# From Paul Eggert (1993-11-18):
|
1007# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1008# From Shanks:
1009# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1010# Whitman gives 1923 Oct 1; go with Shanks.
1011Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1012Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1013Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1014Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1015# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman.
1016Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1017Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1018Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1019# Whitman gives 1937 Oct 3; go with Shanks.
1020Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1021# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1022# and 1943 Apr 13 ``to present time''; go with Shanks.
1023Rule Uruguay 1941 only - Aug 1 0:00 0 -
1024Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS
1025Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1026Rule Uruguay 1943 only - Mar 14 0:00 0 -
1027Rule Uruguay 1959 only - May 24 0:00 1:00 S
1028Rule Uruguay 1959 only - Nov 15 0:00 0 -
1029Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1030Rule Uruguay 1960 only - Mar 6 0:00 0 -
1031Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1032Rule Uruguay 1965 only - Sep 26 0:00 0 -
1033Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1034Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1035Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1036Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1037Rule Uruguay 1972 only - Aug 15 0:00 0 -
1038Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1039Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1040Rule Uruguay 1976 only - Oct 1 0:00 0 -
1041Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1042Rule Uruguay 1978 only - Apr 1 0:00 0 -
1043Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1044Rule Uruguay 1980 only - May 1 0:00 0 -
1045Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1046Rule Uruguay 1988 only - Mar 14 0:00 0 -
1047Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1048Rule Uruguay 1989 only - Mar 12 0:00 0 -
1049Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1050# Shanks says no DST was observed in 1990/1 and 1991/2,
1051# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1052Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1053Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1054Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1055Rule Uruguay 1993 only - Feb 28 0:00 0 -
1056# From Eduardo Cota (2004-09-20):
1057# The uruguayan government has decreed a change in the local time....
1058# http://www.presidencia.gub.uy/decretos/2004091502.htm
| 1000# Uruguay wins the prize for the strangest peacetime manipulation of the rules.
1001# From Shanks:
1002# Rule NAME FROM TO TYPE IN ON AT SAVE LETTER/S
1003# Whitman gives 1923 Oct 1; go with Shanks.
1004Rule Uruguay 1923 only - Oct 2 0:00 0:30 HS
1005Rule Uruguay 1924 1926 - Apr 1 0:00 0 -
1006Rule Uruguay 1924 1925 - Oct 1 0:00 0:30 HS
1007Rule Uruguay 1933 1935 - Oct lastSun 0:00 0:30 HS
1008# Shanks gives 1935 Apr 1 0:00 and 1936 Mar 30 0:00; go with Whitman.
1009Rule Uruguay 1934 1936 - Mar Sat>=25 23:30s 0 -
1010Rule Uruguay 1936 only - Nov 1 0:00 0:30 HS
1011Rule Uruguay 1937 1941 - Mar lastSun 0:00 0 -
1012# Whitman gives 1937 Oct 3; go with Shanks.
1013Rule Uruguay 1937 1940 - Oct lastSun 0:00 0:30 HS
1014# Whitman gives 1941 Oct 24 - 1942 Mar 27, 1942 Dec 14 - 1943 Apr 13,
1015# and 1943 Apr 13 ``to present time''; go with Shanks.
1016Rule Uruguay 1941 only - Aug 1 0:00 0 -
1017Rule Uruguay 1942 only - Jan 1 0:00 0:30 HS
1018Rule Uruguay 1942 only - Dec 14 0:00 1:00 S
1019Rule Uruguay 1943 only - Mar 14 0:00 0 -
1020Rule Uruguay 1959 only - May 24 0:00 1:00 S
1021Rule Uruguay 1959 only - Nov 15 0:00 0 -
1022Rule Uruguay 1960 only - Jan 17 0:00 1:00 S
1023Rule Uruguay 1960 only - Mar 6 0:00 0 -
1024Rule Uruguay 1965 1967 - Apr Sun>=1 0:00 1:00 S
1025Rule Uruguay 1965 only - Sep 26 0:00 0 -
1026Rule Uruguay 1966 1967 - Oct 31 0:00 0 -
1027Rule Uruguay 1968 1970 - May 27 0:00 0:30 HS
1028Rule Uruguay 1968 1970 - Dec 2 0:00 0 -
1029Rule Uruguay 1972 only - Apr 24 0:00 1:00 S
1030Rule Uruguay 1972 only - Aug 15 0:00 0 -
1031Rule Uruguay 1974 only - Mar 10 0:00 0:30 HS
1032Rule Uruguay 1974 only - Dec 22 0:00 1:00 S
1033Rule Uruguay 1976 only - Oct 1 0:00 0 -
1034Rule Uruguay 1977 only - Dec 4 0:00 1:00 S
1035Rule Uruguay 1978 only - Apr 1 0:00 0 -
1036Rule Uruguay 1979 only - Oct 1 0:00 1:00 S
1037Rule Uruguay 1980 only - May 1 0:00 0 -
1038Rule Uruguay 1987 only - Dec 14 0:00 1:00 S
1039Rule Uruguay 1988 only - Mar 14 0:00 0 -
1040Rule Uruguay 1988 only - Dec 11 0:00 1:00 S
1041Rule Uruguay 1989 only - Mar 12 0:00 0 -
1042Rule Uruguay 1989 only - Oct 29 0:00 1:00 S
1043# Shanks says no DST was observed in 1990/1 and 1991/2,
1044# and that 1992/3's DST was from 10-25 to 03-01. Go with IATA.
1045Rule Uruguay 1990 1992 - Mar Sun>=1 0:00 0 -
1046Rule Uruguay 1990 1991 - Oct Sun>=21 0:00 1:00 S
1047Rule Uruguay 1992 only - Oct 18 0:00 1:00 S
1048Rule Uruguay 1993 only - Feb 28 0:00 0 -
1049# From Eduardo Cota (2004-09-20):
1050# The uruguayan government has decreed a change in the local time....
1051# http://www.presidencia.gub.uy/decretos/2004091502.htm
|
1059Rule Uruguay 2004 only - Sep Sun>=15 0:00 1:00 S
1060Rule Uruguay 2005 only - Mar Sun>=8 0:00 0 -
| 1052Rule Uruguay 2004 only - Sep 19 0:00 1:00 S
1053# From Steffen Thorsen (2005-03-11):
1054# Uruguay's DST was scheduled to end on Sunday, 2005-03-13, but in order to
1055# save energy ... it was postponed two weeks....
1056# http://www.presidencia.gub.uy/_Web/noticias/2005/03/2005031005.htm
1057Rule Uruguay 2005 only - Mar 27 2:00 0 -
|
1061# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1062Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1063 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1064 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1065 -3:00 Uruguay UY%sT
1066
1067# Venezuela
1068# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1069Zone America/Caracas -4:27:44 - LMT 1890
1070 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1071 -4:30 - VET 1965 # Venezuela Time
1072 -4:00 - VET
| 1058# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1059Zone America/Montevideo -3:44:44 - LMT 1898 Jun 28
1060 -3:44:44 - MMT 1920 May 1 # Montevideo MT
1061 -3:30 Uruguay UY%sT 1942 Dec 14 # Uruguay Time
1062 -3:00 Uruguay UY%sT
1063
1064# Venezuela
1065# Zone NAME GMTOFF RULES FORMAT [UNTIL]
1066Zone America/Caracas -4:27:44 - LMT 1890
1067 -4:27:40 - CMT 1912 Feb 12 # Caracas Mean Time?
1068 -4:30 - VET 1965 # Venezuela Time
1069 -4:00 - VET
|