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CLDR-17351 Updating CLDR time zone data with IANA TZDB 2024a #3498

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Feb 8, 2024
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CLDR-17351 Updating CLDR time zone data with IANA TZDB 2024a #3498

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6 changes: 4 additions & 2 deletions common/supplemental/metaZones.xml
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Original file line number Diff line number Diff line change
Expand Up @@ -802,7 +802,8 @@ For terms of use, see http://www.unicode.org/copyright.html
</timezone>
<timezone type="Asia/Almaty">
<usesMetazone to="2004-10-30 20:00" mzone="Almaty"/>
<usesMetazone from="2004-10-30 20:00" mzone="Kazakhstan_Eastern"/>
<usesMetazone to="2024-02-29 18:00" from="2004-10-30 20:00" mzone="Kazakhstan_Eastern"/>
<usesMetazone from="2024-02-29 18:00" mzone="Kazakhstan_Western"/>
</timezone>
<timezone type="Asia/Amman">
<usesMetazone to="2022-10-27 22:00" mzone="Europe_Eastern"/>
Expand Down Expand Up @@ -1011,7 +1012,8 @@ For terms of use, see http://www.unicode.org/copyright.html
<usesMetazone from="1972-05-31 20:00" mzone="Arabian"/>
</timezone>
<timezone type="Asia/Qostanay">
<usesMetazone from="2004-10-30 21:00" mzone="Kazakhstan_Eastern"/>
<usesMetazone to="2024-02-29 18:00" from="2004-10-30 21:00" mzone="Kazakhstan_Eastern"/>
<usesMetazone from="2024-02-29 18:00" mzone="Kazakhstan_Western"/>
</timezone>
<timezone type="Asia/Qyzylorda">
<usesMetazone to="1991-12-15 19:00" mzone="Kizilorda"/>
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8 changes: 4 additions & 4 deletions common/supplemental/windowsZones.xml
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Expand Up @@ -537,7 +537,8 @@ For terms of use, see http://www.unicode.org/copyright.html
<!-- (UTC+05:00) Ashgabat, Tashkent -->
<mapZone other="West Asia Standard Time" territory="001" type="Asia/Tashkent"/>
<mapZone other="West Asia Standard Time" territory="AQ" type="Antarctica/Mawson"/>
<mapZone other="West Asia Standard Time" territory="KZ" type="Asia/Oral Asia/Aqtau Asia/Aqtobe Asia/Atyrau"/>
<!-- Microsoft may create a new zone dedicated for Almaty and Qostanay. -->
<mapZone other="West Asia Standard Time" territory="KZ" type="Asia/Oral Asia/Almaty Asia/Aqtau Asia/Aqtobe Asia/Atyrau Asia/Qostanay"/>
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Almaty and Qostanay will use UTC+5 with no DST, same as other zones in Kazakhstan. Almaty is the most populous city in Kazakhstan, so it can be the primary zone for the region. However, I think Microsoft eventually need to create a new zone for Almaty/Qostanay to preserve historic UTC offset changes separate from this. So this is a temporary solution. This is the reason why I did not change the primary zone (Asia/Oral) in this PR. When Microsoft decide to add a new Windows zone for Almaty/Qostanay, then we will move them to the new zone.

<mapZone other="West Asia Standard Time" territory="MV" type="Indian/Maldives"/>
<mapZone other="West Asia Standard Time" territory="TF" type="Indian/Kerguelen"/>
<mapZone other="West Asia Standard Time" territory="TJ" type="Asia/Dushanbe"/>
Expand Down Expand Up @@ -569,13 +570,12 @@ For terms of use, see http://www.unicode.org/copyright.html
<mapZone other="Nepal Standard Time" territory="001" type="Asia/Katmandu"/>
<mapZone other="Nepal Standard Time" territory="NP" type="Asia/Katmandu"/>

<!-- (UTC+06:00) Astana -->
<mapZone other="Central Asia Standard Time" territory="001" type="Asia/Almaty"/>
<!-- (UTC+06:00) Astana --> <!-- Microsoft probably keeps Central Asia Standard Time, but change Astana to something else. -->
<mapZone other="Central Asia Standard Time" territory="001" type="Asia/Bishkek"/>
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Almaty will be no longer UTC+6. Microsoft uses display text (UTC+06:00) Astana. Astana is the capital of Kazakhstan, but TZ database uses most populous city in the region (in this case, Almaty). Because Almaty moved to UTC+5, it cannot be the default mapping of this windows zone. I'm sure Microsoft preserves this zone, but changing the display text.

I usually pick the most populous region as 001 mapping. If we use this rule, Urumqi is the one among these zones. However, official zone for Urmuqi is actually China Standard Time (UTC+8). UTC+6 is used as "defacto" offset there. For this reason, Urmuqi might not be the zone used for 001 mapping. I picked Bishkek here. This is the second populous region among these regions.

<mapZone other="Central Asia Standard Time" territory="AQ" type="Antarctica/Vostok"/>
<mapZone other="Central Asia Standard Time" territory="CN" type="Asia/Urumqi"/>
<mapZone other="Central Asia Standard Time" territory="IO" type="Indian/Chagos"/>
<mapZone other="Central Asia Standard Time" territory="KG" type="Asia/Bishkek"/>
<mapZone other="Central Asia Standard Time" territory="KZ" type="Asia/Almaty Asia/Qostanay"/>
<mapZone other="Central Asia Standard Time" territory="ZZ" type="Etc/GMT-6"/>

<!-- (UTC+06:00) Dhaka -->
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8 changes: 6 additions & 2 deletions tools/cldr-code/src/main/resources/org/unicode/cldr/util/data/africa
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Expand Up @@ -30,6 +30,10 @@
# Milne J. Civil time. Geogr J. 1899 Feb;13(2):173-94.
# https://www.jstor.org/stable/1774359
#
# For the 1911/1912 establishment of standard time in French possessions, see:
# Société Française de Physique, Recueil de constantes physiques (1913),
# page 752, 18b.
#
# European-style abbreviations are commonly used along the Mediterranean.
# For sub-Saharan Africa abbreviations were less standardized.
# Previous editions of this database used WAT, CAT, SAT, and EAT
Expand Down Expand Up @@ -113,7 +117,7 @@ Zone Atlantic/Cape_Verde -1:34:04 - LMT 1912 Jan 01 2:00u # Praia

# Chad
# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Ndjamena 1:00:12 - LMT 1912 # N'Djamena
Zone Africa/Ndjamena 1:00:12 - LMT 1912 Jan 1 # N'Djamena
1:00 - WAT 1979 Oct 14
1:00 1:00 WAST 1980 Mar 8
1:00 - WAT
Expand All @@ -139,7 +143,7 @@ Zone Africa/Ndjamena 1:00:12 - LMT 1912 # N'Djamena
# Inaccessible, Nightingale: uninhabited

# Zone NAME STDOFF RULES FORMAT [UNTIL]
Zone Africa/Abidjan -0:16:08 - LMT 1912
Zone Africa/Abidjan -0:16:08 - LMT 1912 Jan 1
0:00 - GMT

###############################################################################
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