Skip to content

CALCULATOR · Converters

Time Zone Converter

Convert a time between any two IANA zones with automatic daylight-saving handling.

Show formula
wall clock → UTC via the zone’s offset at that instant → target zone’s wall clock

Inputs

Calendar

Every date field, picker and result uses this calendar.

Result

Your result appears here

Enter Time and the result fills in as you type.

How it works

  1. Pick the source zone and the time you mean in that zone.
  2. Pick the target zone — use the swap control to reverse the direction.
  3. Read the converted time, the offset difference and whether the date shifts.

Frequently asked questions

Does this handle daylight saving time?

Yes. Offsets are resolved from the IANA time-zone database for the specific date you enter, not from a fixed table, so a conversion in July and one in January give different answers where they should.

Why does the date sometimes change?

Because the two zones can be on different calendar days at the same instant. The result says "next day" or "previous day" explicitly rather than leaving you to work it out from the clock alone.

What about zones with half-hour or 45-minute offsets?

They are handled the same way. India at UTC+5:30 and Nepal at UTC+5:45 come from the same database as every whole-hour zone.

What happens during a spring-forward gap?

A local time that does not exist — the hour a clock skips — resolves to the platform’s best real instant rather than to an invented offset.

Examples

It is 09:00 in New York — what time is it in London?
14:00 while New York is on UTC−5 and London on UTC+0, and 14:00 again in summer when both have shifted. The tool resolves both offsets for the date you pick rather than assuming a fixed five hours.
A 17:00 meeting in London, joined from Tokyo?
Tokyo is UTC+9 year-round, so a 17:00 GMT meeting lands at 02:00 the next day — the result flags the date change.

Related calculators