Time zone converter

Convert a date and time between IANA time zones. Check the local date, UTC offset and daylight saving before a call or trip.

From time zone · find a city

From time zone

Start date (CE)29 Oct 2026

Start timeHH:MM · 24-hour

If the local time occurs twice

To time zone · find a city

To time zone

Uses bundled IANA time zone rules 2026f. Governments may change future rules.

Preparing your tool…

How it works

Resolve the source wall time using the bundled IANA rules, then show that same instant in the destination. A missing DST time is rejected; a repeated time requires an occurrence.

Example

15 January 2027 at 09:00 in New York is 14:00 in London and 19:45 in Kathmandu.

Is London always UTC?

No. London normally uses UTC+1 during summer. Choose Europe/London for London rules and UTC for a fixed UTC clock. Future rules may change; the data version is shown below the form.