Manually configure daylight saving time dates by adding a new time zone
To manually add a new time zone by using the Time Zone Editor, follow these steps:
1. Start Time Zone Editor.
2. Click New. In the Time Zone Name box in the Edit Time Zone dialog box, type the time zone name in the following format:
(GMT +/- 0x:00) TimeZone DisplayName
For example, type (GMT-10:00) MyCountry1, MyCity1, MyCity2.
Note The maximum number of characters that you can type for the time zone name is 63 characters.
3. In the Abbreviation box, type the common name for the time zone. For example, type MyCountry Time Zone.
4. In the Offset from GMT box, select the appropriate offset from GMT time.
5. Click to select the Automatically set Daylight Saving Time check box.
6. Specify the correct daylight saving time start date and end date. To do this, follow these steps:
a. 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.
b. Specify the time that you want to start daylight saving time. For example, select 2:00 A.M.
c. 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.
d. Specify the time that you want to end daylight saving time. For example, select 2:00 A.M.
e. In the Abbreviation box at the bottom of the Edit Time Zone dialog box, type the name that you specified in step 3
f. In the Daylight Bias box, specify how long that you want the time to change when daylight saving time is in effect. For example, to set the clock forward by 1 hour, leave the default setting of +1:00.
g. Click OK.
h. Click Start, point to Settings, point to Control Panel, and then double-click Date/Time.
i. Click the Time Zone tab.
j. Select the new time zone you created, and then click Apply.