How to convert time between time zones
- Pick the date and time, and the time zone it is in. Now fills in the current time.
- Every time zone in the list shows the matching local time, its UTC offset, the date, and whether it falls on the same, next or previous day. A moon marks night-time hours.
- Add cities from the menu below and remove the ones you do not need. Your list is saved on this device.
Why time zone maths is tricky
Offsets change during the year because of daylight saving time, and countries start and end it on different dates. The United States switches on the second Sunday of March and the first Sunday of November, Europe on the last Sundays of March and October, and most of Asia, Africa and South America do not switch at all. For a few weeks each spring and autumn the gap between New York and London is four hours instead of five. Some zones are offset by half or quarter hours, such as India (UTC+05:30) and Nepal (UTC+05:45).
This converter uses the IANA time zone database built into your browser, the same data used by phones and operating systems, so it accounts for daylight saving rules for any date you choose, past or future. If a time does not exist (it was skipped when clocks went forward), the nearest valid time is used.
When scheduling across many places, choose times when nobody is shown with a moon. For international calls, 13:00–16:00 UTC usually reaches Europe in the afternoon and the Americas in the morning.
What is UTC?
Coordinated Universal Time, the reference time all time zones are defined from. It does not change for daylight saving. GMT is the same as UTC for everyday use.
Does it handle daylight saving time?
Yes. Offsets are calculated for the exact date you choose, using your browser's time zone database.
Why do some cities share a time zone name?
Time zones are named after a representative city, such as America/New_York for US Eastern time. Pick the city nearest to the place you need.