Atlantic time is broken
From my very limited experience with this program: I live in Halifax, Canada, which uses Atlantic Time. A search for "Halifax" yielded Halifax, UK, so I tried "Halifax, Canada", which it found and displayed as an orange dot in the correct place on the map, but the clock still displayed UK time. (By the way, Halifax, Canada is roughly three times larger by population than Halifax, UK; the Canadian city should be the search default.) Hence, two stars.
Fire5ign about
World Clock HD for time lag, travel, world time, v1.6