Time Zone Converter
A time in one country as it reads in another, daylight saving included.
Recent
Formula
How the calculation works
The time is first turned into a single instant in UTC, and only then written out in the target zone. Doing it in that order is what makes the daylight-saving steps come out right: a rule that is true in June is not true in January, and the zone database behind the browser knows which applies to the date you entered.
The result shows the converted date, the converted time, the offset in hours and how many days the date moved. The last one matters most in practice: a 09:30 call from Dhaka lands at 22:30 the previous day in New York, so the day is shown separately rather than left to be worked out.
Common mistakes
- Assuming a fixed hour gap. London is one hour ahead of UTC in summer and zero in winter, so the gap depends on the date.
- Reading the time and missing the day. Half the world is a day behind or ahead at any moment.
- Using the phone's own clock as the source zone when travelling -- the phone has already moved, so a manual zone choice is safer.
When to use it
- Use it to time a call to family abroad, a flight arrival or a deadline in another office.
- The zone list is the handful people actually need, not every zone in the database.
Worked example
15 June 2026, 09:30 in Dhaka: 04:30 in London the same day.
Common questions
Is daylight saving handled?
Yes. The zone rules come from the browser's own database, so the rule for the date you enter is the real one -- London is an hour ahead in summer and not in winter. Hand-written rules would be wrong twice a year.
Can the date change?
Yes, often. 09:30 in Dhaka becomes 22:30 the previous day in New York, so both the date and how many days it shifted are shown, so the day is not missed.
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