An update is available for Subsystem for UNIX-based Applications in Windows Server 2003 R2 that addresses daylight saving time changes in 2007

The U.S. Energy Policy Act of 2005 was passed by the United States Congress in July, 2005. This Act extended daylight saving time (DST) in the United States by approximately four weeks. Therefore, beginning in 2007, DST will start three weeks earlier on March 11, 2007, and will end one week later on November 4, 2007. The new DST period is four weeks longer than previously observed. These four weeks are referred to the "extended DST period." For more information, visit the following Microsoft Web site:

An update for DST changes in 2007 is now available for computers that are running Subsystem for UNIX-based Applications (SUA) in Microsoft Windows Server 2003 R2.

Software update information

In the spring of 2007, the start date and the end date for DST in the United States will change to comply with the Energy Policy Act of 2005. The dates will change as follows. A time zone update for DST that will address this issue for Subsystem for UNIX-based Applications in Windows Server 2003 R2 is now available. This update modifies the Windows-to-Portable Operating System Interface (POSIX) time zone mapping that is built in to Subsystem for UNIX-based Applications.

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.

Prerequisites

To apply this update, you must have the following installed:

• One of the following service packs:
  • Microsoft Windows Server 2003 Service Pack 1 (SP1)
  • Microsoft Windows Server 2003 Service Pack 2 (SP2)
  For more information, click the following article number to view the article in the Microsoft Knowledge Base:
  889100� How to obtain the latest service pack for Windows Server 2003
• Subsystem for UNIX-based Applications
• The hotfix that is mentioned in the following Microsoft Knowledge Base article:
  932143� A hotfix is available for Microsoft Windows Services for UNIX and Subsystem for UNIX-based Applications that addresses the change to daylight saving time in 2007

Restart requirement

You must restart the computer after you apply this update.

Update replacement information

This update does not replace any other updates.

File information

The English version of this update 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.

Windows Server 2003 R2, 32-bit x86 versions

Windows Server 2003 R2, 64-bit x64 versions

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.