How to use it
- When the page opens, the “from” zone is your own and the time is now. Change the date and time, or press Now to come back.
- Type the zone the time is in, and the zone you want, in the two fields. Suggestions appear as you type; the common zones come first.
- Read the converted time, the UTC offsets and the difference in hours. Swap exchanges the two zones.
- The table shows the same moment in UTC, New York, London, Madrid, Moscow and Tokyo.
How the conversion works
Each time zone is a rule for how far its clocks are from UTC on a given date. The converter finds the exact moment at which the “from” zone shows your date and time, then asks the browser what the clocks show in the other zone at that moment. Both offsets are taken for that date, so daylight saving time is always right for the day you pick.
Two special cases come from clock changes:
- Skipped time. When the clocks go forward, an hour does not exist. Such a time is moved forward by the gap: 2:30 am becomes 3:30 am.
- Repeated time. When the clocks go back, an hour happens twice. The converter uses the first one, before the change, and says so.
Worked example
12:00 UTC on 3 November 2026. The US moved its clocks back on 1 November, so New York is on Eastern Standard Time, UTC−5:
- New York: 7:00 am (UTC−5);
- London: 12:00 noon (UTC, winter time);
- Madrid: 1:00 pm (UTC+1);
- Moscow: 3:00 pm (UTC+3, no daylight saving time);
- Tokyo: 9:00 pm (UTC+9).
Tips
- Meetings across zones. Convert from the organiser’s zone and check the date too: a late evening call in Los Angeles is already the next morning in Europe.
- Abbreviations are ambiguous. CST can mean US Central or China Standard Time; zone names like America/Chicago are not.
- For a moment stored as a number of seconds, use the Unix timestamp converter.