With Windows Vista you can now add two additional time zones with mini clocks that pop up when you hover the mouse over it.
- Right click on the clock in the taskbar and select Adjust Date/Time.

- Click on the Additional Clocks tab.
- Check the box for each additional clock and set it’s time zone.
- Enter a display name for your clock and hit OK.

- Now when you hover your mouse over or click on the clock you will see the additional clocks you just added








