WorldTime is an application that shows what time it is in different locations across the world.
It stands out from the crowd by featuring a day-night sun map (terminator line) that does not use data services to create the map and the ability to pin cities on start screen (requires lock screen access).
Choose from over 500 cities to show the time (with daylight savings) and sunrise/sunset times.
TRIAL version does not expire but has ads and you can only add 3 cities to your list.