On Thu, 24 Sep 2026 11:37:41 GMT, Daniel Jeliński <[email protected]> wrote:

> Simplify the system TimeZone retrieval.
> 
> The new code behaves just as before in the most common case where 
> `GetDynamicTimeZoneInformation` returns a known `TimeZoneKeyName`, and 
> reduces the amount of second-guessing when the time zone is not known.
> 
> Method `getGMTOffsetID` was not modified. It is only used as a fallback when 
> `findJavaTZ_md` fails, and while it doesn't look great, it's probably better 
> than most of the alternatives.
> 
> I verified that:
> - the `TimeZoneKeyName` contains non-localized values and is usable on both 
> English and non-English systems,
> - tier1 and tier2 tests continue to pass
> - java/time tests continue to pass when the fallback paths are taken 
> (`findJavaTZ_md` returns a `customZoneName` or a `NULL`)
> 
> ---------
> - [x] I confirm that I make this contribution in accordance with the [OpenJDK 
> Interim AI Policy](https://openjdk.org/legal/ai).

This pull request has now been integrated.

Changeset: 1e6235e4
Author:    Daniel Jeliński <[email protected]>
URL:       
https://git.openjdk.org/jdk/commit/1e6235e4f4cda3b2141e7bc403c4e98594dd96ee
Stats:     359 lines in 1 file changed: 44 ins; 305 del; 10 mod

8392957: (tz) Clean up the Windows TimeZone_md.c

Reviewed-by: naoto, jlu

-------------

PR: https://git.openjdk.org/jdk/pull/33052

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