World time 38 time zones (38 cities + coordinated universal time), daylight saving on/off, auto summer time (DST) switching, Home city/World time city swapping Stopwatch1/1000-second stopwatchMeasuring capacity:00'00''000~59'59''999 (for the first 60 minutes)1:00'00''0~23:59'59''9 (after 60...