Time Zone Converter
Convert a specific date and time from one time zone to another.
Convert a time
Choose a city or time zone for each side.
Supports dates from 1970 to 2100. Everything is calculated in your browser.
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How to use this converter
- 1
Enter the date and time. This is the wall-clock time in the “From” zone, so choose the correct date too.
- 2
Choose the zones. Type a city name or a zone such as Europe/Paris and select it from the suggestions.
- 3
Read the converted time. Check the flag under the result: it appears when the time is skipped or repeated by a clock change.
Example
9:00 AM on March 10, 2026 in New York is 1:00 PM in London. The US is already on daylight time (UTC−4) while the UK is still on UTC+0, so the gap is 4 hours instead of the usual 5.
On March 8, 2026 clocks in New York jump from 2:00 to 3:00 AM. A request for 2:30 AM is flagged as non-existent and treated as 3:30 AM EDT (07:30 UTC).
How it is calculated
The time you enter is a wall-clock time in the source zone. The tool works out which instant that is, using the UTC offset in force on that date in that zone, and then shows the same instant on the destination’s wall clock. Offsets come from your browser’s time zone database, so daylight saving rules are applied for the date you choose.
Times that do not exist. When clocks move forward, the skipped hour never happens. The converter moves such a time forward by the length of the gap (2:30 AM becomes 3:30 AM) and says so.
Times that happen twice. When clocks move back, one hour occurs twice. The tool asks which occurrence you mean: the first (still on daylight time) or the second (after the change). Without a choice it uses the first.
Zone abbreviations such as EST or CET are ambiguous in everyday use, so the tool works with city and IANA zone names and shows UTC offsets next to the result. Some zones appear as “GMT+1” style labels because browsers do not publish abbreviations for them in English.
Questions
Which time does the current time button use?
It sets the date and time to the present moment in the “From” zone.