How to Add Additional Time Zone Clocks in Windows Vista.

Adding Time Zone Clocks
If you want to keep track of what time it is in a different city or country, you can add a clock set to that particular time zone to the clock that’s already on the taskbar. You can add up to two clocks for different time zones.

Here's how to add the aditional clocks.
Click the Start button, type time in the Search box, and click Date And Time to display the Date And Time dialog box.

On the Additional Clocks tab, select this check box to show an additional clock.
Select the time zone you want.
Enter a short, descriptive name for the new clock.
Select this check box, and repeat steps 2 through 4 if you want to add another clock.
Click OK.

To see the clocks, click the clock on the taskbar.
Click anywhere outside the window to close it.