How it works
Each city card displays the live time using its IANA time zone, such as Europe/London, so daylight saving time is applied automatically without a manual offset.
World Clock
See the live time and day-or-night status for all your saved cities at a glance.
Interactive calculator
This calculator becomes interactive when JavaScript is available. The page still provides its method, limits and related tools without JavaScript.
Result classification
Standard-based. The result follows a published technical standard or the browser’s IANA time-zone data. Browser time-zone data can vary by version, so important historical or future rules should be confirmed.
Limitations
Depends on the browser’s standards and time-zone database version. Repeated or nonexistent local times require an explicit choice.
Frequently asked questions
Are my saved cities private?
Yes — they're stored only in your browser's local storage. Use Share to generate a link if you want to send your list to someone else.
Practical guide
Reviewed 27 July 2026How to use the World Clock
- Enter the known values.Use the date, time, place or duration requested above.
- Check the assumptions.Confirm time zone, weekend, inclusion and rounding choices when shown.
- Read and reuse the result.Copy, share or continue to a related tool without retyping unnecessary information.
Common uses
The World Clock is useful for distributed teams, travel desks, family abroad and live operations.
Edge cases to check
Pay particular attention to daylight-saving changes, half-hour offsets and device time-zone database age.