Microsoft KB Archive/932304

= FIX: Visual C++ .NET 2002 Service Pack 1 C runtime daylight saving time 2007 update for the TZ environment variable problem =

Article ID: 932304

Article Last Modified on 4/12/2007

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APPLIES TO


 * Microsoft Visual C++ .NET 2002 Standard Edition
 * The C Run-Time (CRT)
 * Microsoft Visual Studio .NET 2002 Academic Edition
 * Microsoft Visual Studio .NET 2002 Enterprise Architect
 * Microsoft Visual Studio .NET 2002 Enterprise Developer
 * Microsoft Visual Studio .NET 2002 Professional Edition

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SYMPTOMS
When you use the TZ environment variable in the Microsoft Visual C++ .NET 2002 C Run-Time (CRT), the localtime function and _localtime64 function do not correctly recognize daylight saving time (DST). These functions do not recognize DST as starting on the second Sunday of March in 2007 and ending on the first Sunday of November in 2007, according to the United States Energy Policy Act of 2005. Instead, these functions recognize DST as starting on the first Sunday of April and ending on the last Sunday of October.



Hotfix information
A supported hotfix is now available from Microsoft. However, it is intended to correct only the problem that is described in this article. Apply it only to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Microsoft Visual C++ .NET 2002 service pack that contains this hotfix.

To download this hotfix directly, visit the following Microsoft Web site:

http://go.microsoft.com/fwlink/?linkid=87460

Prerequisites
You must have Microsoft Visual Studio .NET 2002 Service Pack 1 (SP1) installed to apply this hotfix.

Restart requirement
You do not have to restart the computer after you apply this hotfix.

Hotfix replacement information
This hotfix does not replace any other software updates.

Hotfix file information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.



STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the &quot;Applies to&quot; section.



MORE INFORMATION
After you apply this hotfix, DST starts on the second Sunday of March and ends on the first Sunday of November in 2007 when you use the TZ environment variable. In 2006 and in earlier years, DST starts on the first Sunday of April and ends on the last Sunday of October.

Note This hotfix only applies to applications that have the TZ environment variable set.

For more information about the TZ environment variable, visit the following Microsoft Developer Network (MSDN) Web site:

http://msdn2.microsoft.com/en-us/library/90s5c885(VS.80).aspx

The following CRT and Microsoft Foundation Classes (MFC) functions call the localtime function and the _localtime64 functions. This issue may also affect these MFC functions.
 * ctime
 * _wctime
 * _tctime
 * _ctime64
 * _wctime64
 * _tctime64
 * mktime
 * _mktime64
 * _utime
 * _wutime
 * _tutime
 * _utime64
 * _wutime64
 * _tutime64
 * COleDateTime::operator=
 * CTime::GetLocalTm
 * CTime::Format

For more information, click the following article number to view the article in the Microsoft Knowledge Base:

824684 Description of the standard terminology that is used to describe Microsoft software updates

Keywords: kbprb kbhotfixserver kbqfe kbpubtypekc KB932304

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