Timezone Countdown is a utility that allows you to create countdowns based on different timezones, relative to a given timezone. By default, this will be the timezone that your device is currently using.
For example, if the time was 13:00 in GMT, and you needed to countdown to 14:10 CET, Timezone Countdown would calculate this as a 10 minute countdown - due to CET being 1 hour ahead of GMT.
Other features include being able to assign names and categories to countdowns, autosaving of countdowns after the app is closed, and display of the default date/time/timezone of the device at the top of the countdowns list.