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Time Zone Converter

Convert a time between any two time zones, with daylight saving handled correctly.

To convert a time between zones, enter the date and time and choose the source and target zones. Offsets are calculated for that specific date using the browser's IANA timezone database, so daylight saving is applied correctly rather than assuming a fixed gap.

Runs in your browser
Privacy
Runs entirely in your browser — nothing is uploaded
Cost
Free, unlimited, no sign-up

Frequently asked questions

Why does the difference between two cities change during the year?

Countries start and end daylight saving on different dates, and some do not observe it at all. London and New York are five hours apart for most of the year but four hours apart for two short windows in spring and autumn.

How to use the time zone converter

  1. 1Enter or paste your date and time.
  2. 2Choose the from zone.
  3. 3Choose the to zone.
  4. 4The result appears immediately — copy or download it.

Embed this tool

Put the working time zone converter on your own site. It runs in your visitors' browsers exactly as it does here — free, no account, nothing uploaded.

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