Istanbul time to London time
London is 3 hours behind Istanbul in January and 2 hours behind in July (Istanbul GMT+3/UTC+03:00 in summer; London BST/UTC+01:00). Enter a Istanbul time below to convert it, or leave it blank to see the current time in both cities.
How to use the Istanbul to London time
- Type a Istanbul time (24-hour) and optionally a date, or leave blank for now.
- Click Convert.
- Read the London time and the working-hours table.
Time difference between Istanbul and London
London is 3 hours behind Istanbul in January and 2 hours behind in July. London observes daylight saving time and Istanbul does not, so the difference changes twice a year. Istanbul uses Europe/Istanbul time (UTC+03:00 in January, UTC+03:00 in July); London uses Europe/London (UTC+00:00 in January, UTC+01:00 in July).
Working week in Istanbul and London
Istanbul: Turkey stays on UTC+3 all year (no daylight saving since 2016). Weekend Saturday–Sunday; office hours 09:00–18:00.
London: Office hours 09:00–17:30, weekend Saturday–Sunday. Clocks go forward on the last Sunday of March (BST, UTC+1) and back on the last Sunday of October (GMT).
Quick conversion table (summer difference)
| Istanbul | London |
|---|---|
| 08:00 | 06:00 |
| 09:00 | 07:00 |
| 10:00 | 08:00 |
| 12:00 | 10:00 |
| 14:00 | 12:00 |
| 16:00 | 14:00 |
| 18:00 | 16:00 |
| 20:00 | 18:00 |
| 22:00 | 20:00 |
Table uses the July difference; the tool above applies the exact rule for any date.
Best time to call between Istanbul and London
Within normal office hours (09:00–18:00) in both cities: 11:00–17:00 Istanbul time. For a compromise outside that window, the fairest slots are the ones nearest each side's start or end of day, alternating who takes the inconvenient hour.
Reverse
Need the other direction? See London to Istanbul, or the general time zone converter.
Frequently asked questions
How many hours ahead is London from Istanbul?
London is 3 hours behind Istanbul in January and 2 hours behind in July.
When it is 12:00 noon in Istanbul, what time is it in London?
10:00 in summer (the same or previous day); use the tool for a specific date.
Does the converter handle daylight saving?
Yes, for the exact date you enter, using the IANA time-zone rules in your browser.
Privacy
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Last updated 2026-09-23.