Important The update in this article is superseded by the cumulative update in Microsoft Knowledge Base article 955839. To obtain the most recent information about daylight saving time (DST), click the following article number to view the article in the Microsoft Knowledge Base:
955839 December 2008 cumulative time zone update for Microsoft Windows operating systems
You do not have to remove any previously installed DST update to apply this cumulative update.
When you try to change the time zone region on the Time Zone tab, the Current time zone label on the Date & Time tab does not change. The label text still shows the previous time zone that the computer was set to.
Additionally, when you use the GetTimeZoneInformation() function to retrieve the time zone that your computer is currently set to by using a custom program, the function may return an empty string for your current time zone.
This problem occurs when the following registry subkey has a Dlt string value or a Std string value that is longer than 31 characters:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Time Zones
When this problem occurs, Microsoft Windows 2000 returns a blank entry when the following registry subkey is accessed:
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.
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, submit a request to 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.
No prerequisites are required.
You do not have to restart your computer after you apply this hotfix.
Hotfix Replacement Information
This hotfix does not replace any other hotfixes.
The English version of this hotfix has the file attributes (or later) 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 tool in Control Panel.
Date Time Version Size File name--------------------------------------------------------------24-Nov-2003 21:52 5.0.2195.6876 61,200 Timedate.cpl
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section of this article.
For more information, click the following article numbers to view the articles in the Microsoft Knowledge Base:
816915 New file naming schema for Microsoft Windows software update packages
824684 Description of the standard terminology that is used to describe Microsoft software updates