[tz] Non-valid timezones, is there a rule to remove them?
yoshito_umaoka at us.ibm.com
yoshito_umaoka at us.ibm.com
Thu Jan 23 14:47:09 UTC 2014
>> If, however, Novosibirsk is 7 hours from GMT and Almaty is 6 hours
>> from GMT, then Microsoft's table is wrong and needs to be updated to
>> separate Almaty and Novosibirsk.
>
>
> Hmmm. You're right and the only think I can do for now is open a bug
> in the Microsoft's bugzilla (or equivalent).
>
"N.Central Asia Standard Time" used to be displayed as "(GMT+06:00)
Almaty, Novosibirsk", but "Almaty" was removed from the display name by
December 2009 cumulative time zone update for Microsoft Windows operating
systems [http://support.microsoft.com/kb/976098]. Later, the UTC offset of
the zone had been changed to +7 by August 2011 update [
http://support.microsoft.com/kb/2570791].
So, although some old MSDN documentation may still have the out of date
information, Windows time zone data is up-to-date for this one.
I'm maintaining a mapping data between the IANA tzids and Windows time
zones in the Unicode CLDR project and review the data about quarterly
basis [
http://www.unicode.org/repos/cldr/trunk/common/supplemental/windowsZones.xml
]. It looks Windows 8.1 start providing an API returning an IANA Time Zone
Database ID [
http://msdn.microsoft.com/en-us/library/windows/apps/windows.globalization.calendar.gettimezone.aspx
], but I did not try it yet.
-Yoshito
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