How timezone conversion works
Civil time zones are offsets from UTC, and many regions change offset with daylight saving time (DST). This converter builds a UTC instant from your local date/time in the source zone, then formats that instant in the target zone using the browser's IANA data.
Example
14:00 in London (Europe/London) on a winter day is 09:00 in New York (UTC−5). In British Summer Time it is usually 09:00 as well relative to Eastern Daylight Time (both sides move), but always check around the DST change weekends in March and November.
Meeting planning tips
- Share the UTC time in the invite as a single source of truth.
- Avoid slots that fall before 08:00 or after 18:00 for any participant.
- Watch the weeks when the US and Europe change clocks on different dates.
For a wall of live clocks, open the world clock. To count hours in a work shift, use the hours calculator.
Frequently asked questions
Does this handle daylight saving?
Yes. Offsets come from the IANA database in your browser.
What is an IANA timezone name?
A standard id such as America/New_York or Asia/Dhaka.
Why is my result an hour out?
You may be near a DST transition, or the source zone was wrong.
Can I convert to UTC?
Yes. Choose UTC as the target (or source).
Is this accurate for flights?
It converts civil time correctly. Airlines also publish airport-local times – always recheck the ticket.
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