1# @(#)southamerica	4.3
2
3# From Guy Harris:
4# From Official Airline Guide - Worldwide Edition (1987).  Countries not
5# listed here do not observe DST, according to the OAG.  Time zone names
6# are pure inventions, and none are supplied for countries not observing
7# DST; updates from natives would be appreciated.  The times that DST
8# starts and ends are based on the assumption that they switch a 2AM just
9# as everybody else does.
10
11###############################################################################
12
13# Brazil
14
15# From Guy Harris:
16# The OAG lists October 25, 1987 and February 12, 1988 as the starting and
17# ending dates, giving them as "estimated date(s) based on previous year".  We
18# infer a rule here from one example, always a dangerous practice....  Yes,
19# they really do switch on Saturday, according to the OAG.
20# "Brazil/Acre" is for the Territory of Acre; "Brazil/DeNoronha" is for
21# Fernando De Noronha.
22
23# From Bob Devine (January 28, 1988):
24# The only information I found is that there was no DST up to 1985.
25# But there was some before 1952!
26
27# From U. S. Naval Observatory (January 16, 1989):
28# BRAZIL     WEST     5 H  BEHIND UTC    TERRITORY OF ACRE
29# BRAZIL     WEST     4 H  BEHIND UTC    ACRE OCT 23, '88-FEB 11,
30# BRAZIL                                 '89 (ESTIMATED)
31# BRAZIL     CENTRAL  4 H  BEHIND UTC    MANAUS
32# BRAZIL     CENTRAL  3 H  BEHIND UTC    MANAUS OCT 23, '88-FEB 11,
33# BRAZIL     CENTRAL                     '89 (ESTIMATED)
34# BRAZIL     EAST     3 H  BEHIND UTC    COASTAL STATES, RIO, SAO
35# BRAZIL     EAST                        PAULO, BRASILIA
36# BRAZIL     EAST     2 H  BEHIND UTC    COASTAL STATES, RIO, SAO
37# BRAZIL                                 PAULO, BRASILIA OCT 23,
38# BRAZIL                                 '88-FEB 11, '89
39# BRAZIL                                 (ESTIMATED)
40# BRAZIL              2 H  BEHIND UTC    ATLANTIC ISLANDS, FERNANDO
41# BRAZIL                                 DE NORONHA
42# BRAZIL              1 H  BEHIND UTC    OCT 23, '88-FEB 11, '89
43# BRAZIL                                 (ESTIMATED)
44# BRAZIL              3 H  BEHIND UTC    FOR MOST MAJOR AIRPORTS.
45
46# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
47Rule	Brazil	1987	max	-	Feb	Sat<=14	2:00	0	S
48Rule	Brazil	1987	max	-	Oct	Sat<=28	2:00	1:00	D
49
50# Zone	NAME			GMTOFF	RULES/SAVE	FORMAT	[UNTIL]
51Zone	Brazil/East		-3:00	Brazil		E%sT
52Zone	Brazil/West		-4:00	Brazil		W%sT
53Zone	Brazil/Acre		-5:00	Brazil		A%sT
54Zone	Brazil/DeNoronha	-2:00	Brazil		F%sT
55
56###############################################################################
57
58# Chile
59
60# From Guy Harris:
61# The OAG lists October 11, 1987 and March 12, 1988 as the starting and
62# ending dates, giving them as "estimated date(s) based on previous year."
63
64# From Bob Devine (January 28, 1988):
65# Chile has had 2nd Sunday in October to 2nd Sunday in March DST since 1977.
66# Switch is at midnight. OAG is right.
67
68# Rule	NAME	FROM	TO	TYPE	IN	ON	AT	SAVE	LETTER/S
69Rule	Chile	1977	max	-	Oct	Sun>=8	0:00	1:00	D
70Rule	Chile	1978	max	-	Mar	Sun>=8	0:00	0	S
71
72# Zone	NAME			GMTOFF	RULES/SAVE	FORMAT	[UNTIL]
73Zone	Chile/Continental	-4:00	Chile		C%sT
74Zone	Chile/EasterIsland	-6:00	Chile		E%sT
75
76###############################################################################
77
78# Paraguay
79
80# From Bob Devine (January 28, 1988):
81# Paraguay: First day in October to last in March.  Midnight switch??
82# Since 1980.
83
84# From U. S. Naval Observatory (January 19, 1989):
85# PARAGUAY            4 H  BEHIND UTC
86# PARAGUAY            3 H  BEHIND UTC    OCT 1, '88-MAR 31, '89
87
88# From Arthur David Olson (January 21, 1989):
89# Still don't know time of day when switch occurs.  Punt.
90
91###############################################################################
92
93# Argentina
94
95# From Bob Devine (January 28, 1988):
96# Argentina: first Sunday in October to first Sunday in April since 1976.
97# Double Summer time from 1969 to 1974.  Switches at midnight.
98
99# From U. S. Naval Observatory (January 19, 19889):
100# ARGENTINA           3 H BEHIND   UTC
101
102# From Arthur David Olson (January 21, 1989):
103# OAG, USNO and Bob have different data.  Punt.
104