About Global Flight Clock
Global Flight Clock is a free, aviation-style world clock. It shows Zulu (UTC) time and up to three cities on analog watch-style dials, so you can see the time anywhere at a glance.
Features
- Zulu time: live UTC to the second, the reference time used in aviation and the military
- Two or three city clocks, with smooth-sweeping analog hands and a digital readout
- 12- or 24-hour format
- Day/date and moon-phase sub-dials. Tap the moon for its illumination, age and upcoming phases.
- Automatic daylight saving time for every city, using your browser’s built-in time zone database
- Four dial styles to choose from
Who it’s for
Pilots and flight crews, military and government teams, travelers, and anyone who works with colleagues or family across time zones. Our guides explain the concepts behind the clock: Zulu time, UTC vs. GMT, converting UTC to local time, daylight saving time and the 24-hour clock.
Accuracy
The clock uses your device’s system time and the IANA time zone database built into your browser. For best accuracy, keep your device set to update its time automatically. The clock is for general reference, not for navigation or operational timing. For official U.S. time, see time.gov.
Private by design
Your chosen cities and settings are saved only in your browser. See our privacy policy.
Who makes it
Global Flight Clock is an independent project created and maintained by Adam Gouda, a software builder based in Maryland, USA. It’s free to use and supported by advertising. Questions or suggestions? Contact us.