I stumbled across a really handy feature in Windows Vista, which is the ability to display the time in multiple time zones using the system clock.

This is easy to set up:

1. Right click on the time in the task bar and select Adjust Date/Time.
2. Go to the Additional Clocks tab.
3. Select the check box to show the additional clock, pick a time zone and give it a title.
4. You can add up to 2 additional time zones this way.
5. Apply your changes.

Now hover the mouse over the clock in the system tray and you will see your additional times are displayed along with the local time. This feature is very useful to me since I have customers in several different time zones around the World.