Implementation of zoneinfo (Olson, tz) database in .NET c-sharp csharp

Masayoshi Okutsu Masayoshi.Okutsu at Sun.COM
Fri Jun 22 14:31:53 UTC 2007

On 6/22/2007 4:31 AM, Paul Eggert wrote:
> Does this mean that the Windows-Tzid table maintained by the
> CLDR project is incorrect, or that CLDR needs a new table for Vista?
> If so, we should warn the CLDR folks about the problem.  Please see
> <>.

Some time ago I pointed out that there's no concept of tzid on Windows, 
and I asked how CLDR got these "Windows-Tzids." But I don't think I got 
any answer.

The Java runtime uses the GetTimeZoneInformation() and "Time Zones" 
registry values to detect the current Windows time zone and map it to a 
tz database ID using some complicated method. You may want to check 
<JRE_HOME>\lib\tzmappings in JRE/JDK 6 for Windows and the runtime code 
for detecting the current Windows time zone. The source code can be 
downloaded from


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