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KB932389 - 2007 DST update for the TZ variable in the Visual Studio 2005
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A Hotfix is a product update package with one or more updated product files that fix a specific product problem.
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Please carefully review the associated Hotfix KB article to verify the fix is the one needed and there are no known compatibility or installation issues. You may also want to contact a Microsoft Support Professional at
KB932389 FIX: 2007 daylight savings time update for the TZ environment variable in the Visual C++ Redistributable Package in Visual Studio 2005
In Microsoft Visual Studio 2005, if you use the TZ environment variable for the Visual C++ Redistributable Package (VCRedist.exe), the following C runtime (CRT) functions do not recognize daylight saving time (DST) correctly:• localtime
These functions recognize DST as starting on the first Sunday of April and ending on the last Sunday of October for all dates. According to the U.S. Energy Policy Act of 2005, DST starts on the second Sunday of March and ends on the first Sunday of November starting in 2007.
Additional Information about the issue resolved by this Hotfix can be found in its Knowledge Base article at
Search the list of all other publicly available Visual Studio and .NET Framework Hotfixes at
Jul 1 2008 at 12:48 AM
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Wed Mar 7 2007 at 8:00 AM
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