World times and zone conversion
- World clock: shows the current time in major cities (Seoul, Tokyo, New York, London, and more), refreshed every second, with each city's day, date, and UTC offset.
- Convert: pick a base date, time, and city, and see what that moment is in another city. Handy for video calls, flights, and international phone times.
Daylight saving is automatic
Regions like the US and Europe shift their clocks forward an hour in summer. This tool uses the browser's IANA time-zone data, so daylight saving is applied for the right dates automatically — which is why summer and winter offsets can differ.
Good to know
- Conversions follow standard time-zone rules; near a daylight-saving transition on past or future dates, results can be off by an hour.
- Nothing is sent to a server — everything is computed in your browser.
To count days between dates, pair it with the D-day Calculator.