Highlighted rows fall within 09:00–18:00 in both places: 7 shared working hours.
Clock changes in London and Istanbul
London
British Summer Time (BST)
Next clock change Sun 25 Oct 2026 (UTC+1 → UTC+0)
Istanbul
Türkiye Standard Time (UTC+3)
No daylight saving time.
Time difference between London and Istanbul today
Today Istanbul is 2 hours ahead of London. When it is 09:00 in London, it is 11:00 in Istanbul. London is on British Summer Time (BST); Istanbul is on Türkiye Standard Time (UTC+3).
When the London to Istanbul time difference changes
For most of the year Istanbul is 2 hours ahead of London. From 25 October to 31 December 2026, Istanbul is 3 hours ahead of London instead, because the two places change their clocks on different dates. Meetings booked by the usual gap land an hour off in those weeks.
Dates
Istanbul vs London
Length
29 March 2026 to 24 October 2026
2 hours ahead
210 days
25 October 2026 to 31 December 2026
3 hours ahead
68 days
1 January 2027 to 27 March 2027
3 hours ahead
86 days
28 March 2027 to 30 October 2027
2 hours ahead
217 days
31 October 2027 to 31 December 2027
3 hours ahead
62 days
Calling hours for London and Istanbul
When Istanbul is 2 hours ahead of London: 6 shared office hours, 09:00 to 15:00 in London (11:00 to 17:00 in Istanbul).
When Istanbul is 3 hours ahead of London: 5 shared office hours, 09:00 to 14:00 in London (12:00 to 17:00 in Istanbul).
Frequently asked questions about London and Istanbul time
What time is it in Istanbul when it is 9:00 AM in London?
11:00 today; Istanbul is 2 hours ahead of London.
Does the time difference between London and Istanbul change?
Yes. It is usually 2 hours ahead, but changes when one side moves its clocks: 3 hours ahead from 25 October to 31 December 2026; 3 hours ahead from 1 January to 27 March 2027.