Istanbul to London time converter
Pick a date and time in Istanbul to see the matching time and day in London. In January London is 3 hours behind Istanbul; in July London is 2 hours behind Istanbul.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter date in istanbul and time in istanbul.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
London time = Istanbul time + (London UTC offset - Istanbul UTC offset), with both offsets read for the chosen date from the IANA time-zone database (Europe/Istanbul, Europe/London).
Example
Inputs: Date in Istanbul = 2026-01-15, Time in Istanbul = 09:00. Result: Time in London: 06:00 Thursday; Date in London: Thursday, January 15, 2026 (2026-01-15); London vs Istanbul: -3 hours.
Limits and caveats
- Daylight saving dates come from your device time-zone database, so results can differ if it is outdated or a country changed its rules recently.
Questions about this tool
What is the time difference between Istanbul and London?
In January London is 3 hours behind Istanbul; in July London is 2 hours behind Istanbul.
Do Istanbul or London change their clocks in summer?
Istanbul does not use daylight saving time and stays on UTC+3 all year (since 2016). London uses British Summer Time (UTC+1) from the last Sunday of March to the last Sunday of October and GMT (UTC+0) the rest of the year.
Why does London sometimes show a different date?
London is behind Istanbul, so the first hours after midnight in Istanbul can still be the previous day in London. The tool shows the correct London date and weekday for every conversion.