How to configure daylight saving time in 2007 manually for United States, Canada and Mexico?

Starting in year 2007, United States, Canada and Mexico will change starting and ending dates of Daylight Saving Time. See our other Daylight Saving Time tutorials.

If bought your computer before 2007, your Windows system will not follow the new starting and ending dates correctly. But you can fix your system by changing settings in the system registry using this tutorial:

1. Download the Tzedit.exe utility package.

2. Run Tzedit.exe

3. In the Time Zones list, select a time zone, and then click Edit. For example, click (GMT-08:00) Pacific Time (US & Canada); Tijuana, and then click Edit.

4. In the Edit Time Zone dialog box, click to select the Automatically set Daylight Saving Time check box.

5. Specify the correct daylight saving time start date and end date. To do this, follow these steps:

• In the Start Day box, click the number of the day, the corresponding day of the week, and the month that you want. For example, click Second, click Sunday, and then click March.
• Select the time that you want to start daylight saving time. For example, select 2:00 A.M.
• In the Last Day box, click the number of the day, the corresponding day of the week, and the month that you want. For example, click First, click Sunday, and then click November.
• Select the time that you want to end daylight saving time. For example, select 2:00 A.M.
• In the Daylight Bias list, select how long you want the time to change when daylight saving time is in effect. For example, to set the clock forward 1 hour, leave the default setting of +1:00.
• Click OK.

6. Read this Microsoft article for more information.