HP 820 User Manual page 28

24 HP Jornada H/PC User's Guide
Selecting your Home City
Windows CE bases its regional settings on the city you
designate as your "Home City." Click the city nearest
your home in the drop-down list on the Home City
tab. If your city is not listed, you can use the World Clock
control panel to add it later. (See the World Clock topic in
online Help.)
Select the city nearest your home from this list.
World Clock displays regional information
based on the selected city.
Type the current time here to set the clock.