International Time 

Discover how this program will help you keep track of the local current date and time of your contacts who live in a different time zone to yours. These contacts could be loved ones, friends, work contacts, . . . Ideal companion to chat programs.
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TimeZone Expert world time zone clock 

-Show multiple time zone clocks in Windows taskbar.-Time converter for time calculations across Timezones.-Calculate working time overlap for different time zones.-Query more than 250 countries and 3000 cities time zone information .
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