Big Time Pro is an enhanced version of the freeware Big Time. It shows the time of up to 4 world cities and 1 home city. Daylight saving time is calculated automatically based on the start and end date. There is also an alarm that can be configured to activate on certain days only. You can also set your Palm clock to other cities' time, this is especially useful for traveller whose cross different time zones. A Time Calculator is also included and is very useful for people who need to contact others in different cities and time zones. There is also a German and Swedish version. All in all, Big Time Pro is a full-featured but easy to use world time clock.