A free, accurate world clock and suite of time zone tools for anyone working, living or connecting across borders.
WorldClock.International is a free world clock and time zone toolkit. It shows the current local time for 538 cities across 193 countries, updated in real time using your device's clock and the IANA timezone database — the global standard used by all major operating systems.
The site was built for anyone who regularly deals with multiple time zones — remote workers coordinating with international teammates, families staying connected across continents, travellers planning ahead, and businesses scheduling calls with clients and partners worldwide.
Beyond the world clock, WorldClock.International offers a suite of free time zone tools:
Times are calculated using your device's system clock and the IANA timezone database — the same standard used by Windows, macOS, iOS, Android and all major operating systems. The world clock refreshes every 10 seconds. Sunrise and sunset times use the NOAA Solar Calculator algorithm, accurate to within 1–2 minutes for any location on Earth.
WorldClock.International does not require you to create an account or provide any personal information. Your city list and preferences are saved in your browser's local storage and never sent to a server. See our Privacy Policy for full details.
Have a question, found an issue, or want to suggest a city? Use the contact page to get in touch.