In August of 2005, the United States Congress passed the Energy Policy Act, which makes daylight saving time (DST) start three weeks earlier and end one week later.
The law goes into effect this year, which means we will all “spring forward” our clocks at 2:00 A.M. on the second Sunday in March (March 11, 2007).
If you use a recent version of the Windows operating system, you know that normally you don't have to manually change the time for DST. The operating system does it for you.
Even though these versions of Windows are smart enough to know about DST, they're not smart enough to know about the Energy Policy Act, so you'll have to install an update that will make the change.
The only exception for this is Windows Vista. If you buy a new computer that runs Windows Vista, the updates are already installed.
To help ensure that your computer updates correctly on March 11, download the update below that corresponds to the operating system that you use.
These updates will change the time zone data to account for the United States DST change and will take care of other related DST changes, time zone behavior, and settings.
The following files are available for download from the Microsoft Download Center:
Download the Update for Windows XP package now.
Download the Update for Windows XP x64 Edition package now.Download the Update for Windows Server 2003 package now. Download the Update for Windows Server 2003 for Itanium-based Systems package now. Download the Update for Windows Server 2003 x64 Edition package now.
There is no update for Windows 2000, but you can make the change manually.
All versions of Windows can be manually updated with the tzedit.exe utility which you can use to create and edit time zone entries for the Date and Time settings in Control Panel, especially for daylight saving time.
For more information, see How to configure daylight saving time for the United States in 2007.
Windows XP SP1 is no longer supported. For increased security, go to Microsoft Update to upgrade to Windows XP SP2.
To read more about how this update works, see Preparing for daylight saving time changes in 2007.
Right now, these updates are not a high priority, so they will not be installed automatically. To get updates like these automatically, turn on Automatic Updates.
None of the above links to the specific files in the Download Center work - all take you to a page that states "The download you requested is unavailable. If you continue to see this message when trying to access this download, go to the "Search for a Download" area on the Download Center home page." A search for "daylight savings time" brings up a slew of links, but not the the ones referred to above.
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The United States Congress passed the Energy Policy Act in 2005, which makes daylight saving time (DST),
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