Live · calculated from the IANA time-zone database

Time difference between London and Istanbul

Short answer

Istanbul is 2 hours ahead of London. Right now it is 13:36 in London (GMT+1, UTC+1) and 15:36 in Istanbul (GMT+3, UTC+3).

Right now

London · United Kingdom

13:36

Tuesday, September 15, 2026

British Summer Time · GMT+1 · UTC+1

Istanbul · Turkey

15:36

Tuesday, September 15, 2026

Türkiye Standard Time · GMT+3 · UTC+3

Times at the moment this page was generated. Reload for a fresh reading.

Does the difference between London and Istanbul change during the year?

Yes. For 210 days of 2026 the difference is 2 hours, but it moves whenever London or Istanbul enters or leaves daylight saving time. Here is the full 2026 calendar (dates in UTC):

From	Until	Istanbul vs London
January 1	March 29	+3 h
March 29	October 25	+2 h
October 25	December 31	+3 h

The highlighted row is the current period. Every date comes from each zone's official rules, not from a hand-typed table.

Best time to call Istanbul from London (and vice versa)

The window in which both cities are inside their 9:00–17:00 working day runs from 09:00 to 15:00 in London, which is 11:00 to 17:00 in Istanbul: 6 hours of overlap per day. For a call that disturbs nobody, aim for the middle of that window.

Outside that window, the practical rule: mornings in Istanbul are afternoons in London. Avoid any hour that falls before 8:00 or after 21:00 in either city.

London to Istanbul conversion table

Each London hour and its equivalent in Istanbul today. Rows shaded green are working hours (9:00–17:00) in both cities at once.

London time · Tue, Sep 15	Istanbul time
00:00	02:00
01:00	03:00
02:00	04:00
03:00	05:00
04:00	06:00
05:00	07:00
06:00	08:00
07:00	09:00
08:00	10:00
09:00	11:00
10:00	12:00
11:00	13:00
12:00	14:00
13:00	15:00
14:00	16:00
15:00	17:00
16:00	18:00
17:00	19:00
18:00	20:00
19:00	21:00
20:00	22:00
21:00	23:00
22:00	00:00next day
23:00	01:00next day

Looking for it the other way round? This page covers both directions: Istanbul to London is the same difference with the sign flipped.

The two time zones

London — Europe/London

London sits on the Greenwich meridian: GMT (UTC+0) in winter and British Summer Time (UTC+1) from the last Sunday of March to the last Sunday of October.

Istanbul — Europe/Istanbul

Istanbul has stayed on UTC+3 all year since 2016, so it matches Moscow and Riyadh and is 2 hours ahead of Central Europe in winter but only 1 in summer.

Frequently asked questions

How many hours difference between London and Istanbul?

Istanbul is 2 hours ahead of London. For most of the year (210 days) the difference is 2 hours; it shifts during the weeks when one of the two cities enters or leaves daylight saving time.

When it is 12:00 noon in London, what time is it in Istanbul?

14:00 in Istanbul (at today's difference of 2 hours).

What is the best time for a meeting between London and Istanbul?

Between 09:00 and 15:00 in London, which is 11:00–17:00 in Istanbul: 6 hours of overlap inside both cities' 9:00–17:00 working day.

Do London and Istanbul observe daylight saving time?

London: yes. Istanbul: no. Because only one of them changes its clocks, the difference moves by one hour twice a year.

What time zone is London in? And Istanbul?

London: British Summer Time (Europe/London, UTC+1). Istanbul: Türkiye Standard Time (Europe/Istanbul, UTC+3).

Tools

Meeting grid — add both cities and click a slot

Time zone converter — any city, any time

Working hours overlap calculator

Daylight saving time 2027 — all dates