Translate Windows timezone to TZID?

[Masayoshi Okutsu]

What are the Windows IDs in the table? When I worked on platform time 
zone detection issues for Java on Windows, a problem was that Windows 
didn't have any notion of time zone IDs. So, I used Time Zones registry 
keys for the mapping support, but I had to ask Microsoft not to localize 
those registry keys.

Thanks,
Masayoshi

Mark Davis wrote:

>We have *a* mapping of Windows IDs in CLDR. See
>
>http://unicode.org/cldr/data/diff/supplemental/supplemental.html#windows___tzid
>
>While we have tried to make it accurate, it is difficult to get a good match
>because the Windows IDs encompass what would be many different TZIDs.
>
>‎Mark
>
>----- Original Message ----- 
>From: "Dave Cantor" <dcantor at shore.net>
>To: <tz at lecserver.nci.nih.gov>
>Sent: Tuesday, June 14, 2005 13:01
>Subject: Translate Windows timezone to TZID?
>
>
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>>I've been thinking about this problem for a while.  Anyone have
>>any thoughts?
>>
>>Suppose you have a portable computer running Microsoft Windows
>>(whatever version you dislike least) which you take with you when
>>you travel.  When you power it up and you're in a timezone
>>different from the one you last used it in, you use Windows'
>>Adjust Date/Time dialogue to set the correct timezone.
>>
>>Now Windows has bogus names for the zones, like
>>"Dlt"="GMT Daylight Time"
>>"Std"="GMT Standard Time"
>>"Dlt"="Hawaiian Daylight Time"
>>"Std"="Hawaiian Standard Time"
>>which you can read out of the registry.
>>
>>Suppose I want to get the correct name of the time zone
>>(from which maybe I'll generate the correct abbreviation).
>>So for GMT, the proper strings would be
>>"Greenwich Mean Time" for standard time, and there is no daylight
>>time.  For Hawaii, I believe that's properly Hawaiian-Aleutian
>>Standard Time; again no daylight observance.
>>
>>Is there a way anyone can think of to map the incorrect
>>Windows text strings to correct text strings algorithmically?
>>
>>(Too bad Windows doesn't have the exemplar city name in its
>>database of time zones.)
>>
>>Dave Cantor
>>
>>--
>>David A. Cantor
>>Groton, CT  06340-3731      DCantor at shore.net
>>
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