How World Clock works

See the current local time, date, UTC offset and day or night state across a customizable list of world cities.

The formula

Each city is formatted from one shared browser-clock instant using its IANA timezone identifier and the browser Intl API.

A practical example

Pin New Delhi, London, New York and Tokyo to compare their current local times on one dashboard.

Important limitations

Times depend on your device clock and the timezone data shipped with your browser. Saved cities and format preferences stay in local browser storage.

Frequently asked questions

Does the clock account for daylight saving time?

Yes. The browser applies the selected IANA timezone rules for the current instant.

Are my selected cities stored online?

No. They are optionally stored only in this browser.