If you regularly deal with people in different time zones it could be useful to have an easy method to check the time in those different time zones. In Windows Vista you can add up to two additional clocks into the system tray for different time zones. Click on the Windows Vista clock and then select “Change date and time settings”. In the Date and Time window that appears click the “Additional Clocks” tab. Tick the checkboxes for the clock(s) that you wish to appear and then set the time zone and display name. Now when you click the clock in the system tray the window that appears will display multiple clocks, each representing different time zones.