World Clock
NEWInstantly view the current local time in any city or time zone around the world, updated live every second.
How to use World Clock
- The clock loads with your local zone plus a few major world cities already displayed.
- Use the 'Add Time Zone' dropdown to pick any IANA zone and click 'Add Zone' to insert it into the list.
- Click the × button on any row to remove that time zone from the display.
What is World Clock?
The World Clock displays real-time local time, date, and UTC offset for multiple time zones simultaneously. It uses the browser's built-in Intl.DateTimeFormat API with standard IANA time zone identifiers, so the data is always accurate including daylight saving time adjustments.
Start with a default set of major zones and add or remove zones freely. Each row shows the zone name, the formatted local time in 24-hour notation, the current date, and the current UTC offset — everything you need to coordinate across regions at a glance.
Because all calculations happen entirely in your browser, no data leaves your device and the clock works offline once the page has loaded.
FAQ
- Does the clock account for daylight saving time?
- Yes. The World Clock uses the browser's Intl.DateTimeFormat API with full IANA time zone support, which automatically handles daylight saving time transitions for every zone.
- How often does the time update?
- The display refreshes every second using a JavaScript interval, so the seconds counter stays accurate in real time.
- Can I add a time zone not in the dropdown?
- The dropdown covers the most commonly used IANA zones. If you need a specific zone not listed, future versions may add a free-text IANA input field.
Related tools
Last updated: