Are you ever in another time zone, do you travel to other parts of the world, or are you just too lazy to figure out what time it is in Japan? Well with Windows 7 you can add up to two extra clocks from different time zones in your system tray. This will also work for Vista but screenshots are from Windows 7. Check out how to do it!
Step 1 Go to your settings.
Click the Clock and click on Change time and date setting.
Step 2 Set up clocks.
Under the Additional Clocks tab, select up to two more clocks. Click OK to save your settings.