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

Paul Eggert eggert at CS.UCLA.EDU
Thu Jun 21 19:31:25 UTC 2007

"Joshua Kifer" <joshua at> writes:

> the only thing being retained is the timezone name and its UTC
> offset.  No historical data is utilized.

Thanks.  Here's a draft of what could go into tz-link.htm; comments
and corrections are welcome.

   <li><a href="">PublicDomain</a>
   has a copy of a recent <code>tz</code> database, accessed via a <a
   href="">C#</a> library. As its
   name suggests, it is in the public domain. Only current time stamps
   are supported; historical data are not used.</li>

> the undocumented and non-standard timezone information in the
> Windows registry (the indices of which actually changed in Windows
> Vista, preventing us from upgrading our services to that OS if we
> had desired to, or desire to in the future).

Ouch.  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

Also, does this mean that the Wikipedia coverage of this topic is
incorrect and/or incomplete?  Wikipedia addresses some of the issues
with Microsoft Windows and DST, but it doesn't mention the issue of
index changes in Vista.  Please see

(See what you get for being helpful?  People keep asking you questions.  :-)

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