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.
Download and install the update for Windows XP (SP2), Windows Server 2003, or Windows Server SP1
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:
What to do if you use Windows 2000
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.
What to do if you use Windows XP SP1
Windows XP SP1 is no longer supported. For increased security, go to Microsoft Update to upgrade to Windows XP SP2.
Want more information on this change?
To read more about how this update works, see Preparing for daylight saving time changes in 2007.
Turn on Automatic Updates
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.