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# Copyright (C) 2016 and later: Unicode, Inc. and others.
# License & terms of use: http://www.unicode.org/copyright.html
######################################################################
# Copyright (C) 2007-2014, International Business Machines
# Corporation and others. All Rights Reserved.
######################################################################
# This is an ICU-specific file with the same format as regular
# tzdata time zone files, for consistent parsing by the tools that
# turn "Olson" tzdata into ICU's zoneinfo.txt.
# The purpose of this file is to give ICU a superset of the time zones
# that are in CLDR and also include legacy ICU time zones originally
# in tz.alias for rataining backward compatibility.
# Add Etc/Unknown, defined by CLDR. Give it Etc/GMT behavior.
# Zone NAME GMTOFF RULES FORMAT
Zone Etc/Unknown 0 - Unknown
# SystemV time zones.
# The Olson systemv file has these commented out.
# Zone NAME GMTOFF RULES/SAVE FORMAT [UNTIL]
Zone SystemV/AST4ADT -4:00 SystemV A%sT
Zone SystemV/EST5EDT -5:00 SystemV E%sT
Zone SystemV/CST6CDT -6:00 SystemV C%sT
Zone SystemV/MST7MDT -7:00 SystemV M%sT
Zone SystemV/PST8PDT -8:00 SystemV P%sT
Zone SystemV/YST9YDT -9:00 SystemV Y%sT
Zone SystemV/AST4 -4:00 - AST
Zone SystemV/EST5 -5:00 - EST
Zone SystemV/CST6 -6:00 - CST
Zone SystemV/MST7 -7:00 - MST
Zone SystemV/PST8 -8:00 - PST
Zone SystemV/YST9 -9:00 - YST
Zone SystemV/HST10 -10:00 - HST
# The list below is for supporting legacy ICU zone aliases.
# These definitions were originally defined in tz.alias.
#### Aliases that conflict with Olson compatibility Zone definition
Link Australia/Darwin ACT
Link Australia/Sydney AET
Link America/Argentina/Buenos_Aires AGT
Link Africa/Cairo ART
Link America/Anchorage AST
Link America/Sao_Paulo BET
Link Asia/Dhaka BST
Link Africa/Maputo CAT
Link America/St_Johns CNT
Link America/Chicago CST
Link Asia/Shanghai CTT
Link Africa/Addis_Ababa EAT
Link Europe/Paris ECT
#Link Europe/Istanbul EET # EET is a standard UNIX zone
####Link EST America/New_York EST # Defined as -05:00
####Link Pacific/Honolulu HST # Defined as -10:00
Link America/Indiana/Indianapolis IET
Link Asia/Kolkata IST
Link Asia/Tokyo JST
#Link Asia/Tehran MET # MET is a standard UNIX zone
Link Pacific/Apia MIT
####Link America/Denver MST # Defined as -07:00
Link Asia/Yerevan NET
Link Pacific/Auckland NST
Link Asia/Karachi PLT
Link America/Phoenix PNT
Link America/Puerto_Rico PRT
Link America/Los_Angeles PST
Link Pacific/Guadalcanal SST
#Link Etc/UTC UTC # Olson LINK
Link Asia/Ho_Chi_Minh VST
#
# Aliases already dropped from the TZ database.
# ICU may also remove these aliases.
#
Link America/Regina Canada/East-Saskatchewan # removed from backward in 2017c
# Note:
# Following section was added for tz database 2018a and 2018b.
# ICU has a bug handling negative DST, and we also don't want to
# flip sumer time name and winter time name for Dublin at least for
# now. Because the change had major impacts to tz database external
# consumers, the tz database maintainer once reverted the Europe/Dublin
# rules (same as 2017c or older) in 2018c. The tz database maintainer
# thinks the changes in 2018a should be brought back when external
# tz database consumers are ready to adopt the change. We don't know
# what CLDR TC want to do with this for now. But if tz database brings
# back the change, and CLDR TC (and ICU TC) want to keep the display name
# unchanged, then we can uncomment the block below to restore ICU
# custom override. (Yoshito 2018-01-23)
#
# tzdata2018a changed Europe/Dublin to use IST (UTC+1) as the standard time
# of the region, and GMT (UTC) as the daylight saving time with negative
# offset (-1 hour) in winter. ICU SimpleTimeZone rejects a zone with negative
# daylight saving time offset. We could remove the restriction in newer version
# of ICU, but such data does not work well with older ICU runtime without
# fixing the issue. For now, we define our own Europe/Dubin in ICU, replacing
# Europe/Dublin data from the tz database.
#
#
# tzdata2018e suggests to use alternative zone definitions for use GB-Eire
# and EU rule after Oct 27, 1968. (Yoshito 2018-05-04)
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Dublin--ICU -0:25:00 - LMT 1880 Aug 2
-0:25:21 - DMT 1916 May 21 2:00s
-0:25:21 1:00 IST 1916 Oct 1 2:00s
0:00 GB-Eire %s 1921 Dec 6 # independence
0:00 GB-Eire GMT/IST 1940 Feb 25 2:00s
0:00 1:00 IST 1946 Oct 6 2:00s
0:00 - GMT 1947 Mar 16 2:00s
0:00 1:00 IST 1947 Nov 2 2:00s
0:00 - GMT 1948 Apr 18 2:00s
0:00 GB-Eire GMT/IST 1968 Oct 27
# The next line is for when negative SAVE values are used.
# 1:00 Eire IST/GMT
# These three lines are for when SAVE values are always nonnegative.
1:00 - IST 1971 Oct 31 2:00u
0:00 GB-Eire GMT/IST 1996
0:00 EU GMT/IST
Link Europe/Dublin--ICU Eire--ICU
#
# tzdata2018e also added another instance of negative DST to
# Europe/Prague and Africa/Windhoek
#
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Europe/Prague--ICU 0:57:44 - LMT 1850
0:57:44 - PMT 1891 Oct # Prague Mean Time
1:00 C-Eur CE%sT 1945 May 9
1:00 Czech CE%sT 1946 Dec 1 3:00
# Vanguard section, for zic and other parsers that support negative DST.
# 1:00 -1:00 GMT 1947 Feb 23 2:00
# Rearguard section, for parsers that do not support negative DST.
0:00 - GMT 1947 Feb 23 2:00
# End of rearguard section.
1:00 Czech CE%sT 1979
1:00 EU CE%sT
# Slovakia
Link Europe/Prague--ICU Europe/Bratislava--ICU
# RULE NAME FROM TO TYPE IN ON AT SAVE LETTER/S
# Vanguard section, for zic and other parsers that support negative DST.
#Rule Namibia 1994 only - Mar 21 0:00 -1:00 WAT
#Rule Namibia 1994 2017 - Sep Sun>=1 2:00 0 CAT
#Rule Namibia 1995 2017 - Apr Sun>=1 2:00 -1:00 WAT
# Rearguard section, for parsers that do not support negative DST.
Rule Namibia--ICU 1994 only - Mar 21 0:00 0 WAT
Rule Namibia--ICU 1994 2017 - Sep Sun>=1 2:00 1:00 CAT
Rule Namibia--ICU 1995 2017 - Apr Sun>=1 2:00 0 WAT
# Zone NAME GMTOFF RULES FORMAT [UNTIL]
Zone Africa/Windhoek--ICU 1:08:24 - LMT 1892 Feb 8
1:30 - +0130 1903 Mar
2:00 - SAST 1942 Sep 20 2:00
2:00 1:00 SAST 1943 Mar 21 2:00
2:00 - SAST 1990 Mar 21 # independence
# Vanguard section, for zic and other parsers that support negative DST.
# 2:00 Namibia %s
# Rearguard section, for parsers that do not support negative DST.
2:00 - CAT 1994 Mar 21 0:00
# From Paul Eggert (2017-04-07):
# The official date of the 2017 rule change was 2017-10-24. See:
# http://www.lac.org.na/laws/annoSTAT/Namibian%20Time%20Act%209%20of%202017.pdf
1:00 Namibia--ICU %s 2017 Oct 24
2:00 - CAT
# End of rearguard section.
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