Istanbul to London — Time Zone Converter
TRT (UTC+3) → GMT/BST (UTC+1). London is 2 hours behind relative to Istanbul right now.
Istanbul
Oct 7, 2026, 2:55 PM
London
Oct 7, 2026, 12:55 PM
Need the reverse? London to Istanbul →
Sample times — TRT to GMT/BST
Sample conversions for today; daylight saving applied.
About Istanbul and LondonIstanbul vs London time difference through 2026
The gap changes twice during 2026, because only London observes daylight saving time. Double-check meetings booked in the weeks around each switch.
Dates (2026) TRT GMT/BST Difference Jan 1 – Mar 28 UTC+3 UTC London is 3 hours behind Mar 29 – Oct 24 UTC+3 UTC+1 London is 2 hours behind Oct 25 – Dec 31 UTC+3 UTC London is 3 hours behind
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
Istanbul vs London time difference through 2026
The gap changes twice during 2026, because only London observes daylight saving time. Double-check meetings booked in the weeks around each switch.
| Dates (2026) | TRT | GMT/BST | Difference |
|---|---|---|---|
| Jan 1 – Mar 28 | UTC+3 | UTC | London is 3 hours behind |
| Mar 29 – Oct 24 | UTC+3 | UTC+1 | London is 2 hours behind |
| Oct 25 – Dec 31 | UTC+3 | UTC | London is 3 hours behind |
Transition dates are the first full day on the new offset; clocks usually change overnight, between 1:00 and 3:00 local time.
Method & sources
Offsets and daylight-saving dates are computed from the IANA Time Zone Database through the JavaScript Intl API — the same rules your phone and computer use. The year table above was generated from those rules when this page was built; the live converter uses the rules installed in your own browser, so it stays correct if a country changes its clocks.
Page last updated: October 1, 2026
Istanbul to London runs two or three hours behind depending on the season. Turkish morning calls reach London before dawn, so afternoons on the Istanbul side are the practical choice.
Frequently asked questions
What is the time difference between Istanbul and London?
Right now the offset is about 2 hours behind (from TRT to GMT/BST). Daylight saving rules differ by region, so use the converter and table above rather than memorising a single number year-round.
Does daylight saving affect Istanbul vs London?
Yes, whenever either region springs forward or falls back, the gap can shift by an hour. This page uses the IANA time-zone database so those transitions are applied automatically.
How do I schedule a meeting across Turkey and the United Kingdom?
Pick a time in the converter, share both columns with attendees, and avoid early-morning or late-night slots on one side. The sample table lists common business hours in the source zone.
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