Slough to Istanbul: time difference
Istanbul is 2 h ahead of Slough. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Slough 10:47 10:47 AM Istanbul 12:47 12:47 PM You –:–
10:47 10:47 AM
British Summer Time · UTC+1
☀️ 07:33 · 🌙 18:03
12:47 12:47 PM
GMT+03:00 · UTC+3
☀️ 07:20 · 🌙 18:19
·
+2 h
Istanbul is 2 h ahead of Slough.
When you, Slough and Istanbul are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇬🇧 Slough
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇹🇷 Istanbul
2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇧 Slough | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 10:47 | 12:47 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | British Summer Time | GMT+03:00 |
| UTC offset | UTC+1 | UTC+3 |
| Offset from Slough | — | +2 h |
| IANA zone | Europe/London | Europe/Istanbul |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | Not observed |
| Sunrise | 07:33 | 07:20 |
| Sunset | 18:03 | 18:19 |
| Daylight | 10 h 29 min | 10 h 59 min |
| People on this clock | 164,455 | 15,701,602 |
Compare Slough with another city
More comparisons with Slough: the time zones next to it and the far side of the clock.
Big time differences
Slough and Istanbul: common questions
How far ahead of Slough is Istanbul?
Istanbul is 2 hours ahead of Slough: UTC+3 against UTC+1.
If it is 9:00 AM in Slough, what time is it in Istanbul?
At 9:00 AM in Slough, clocks in Istanbul show 11:00 AM.
If it is 6:00 PM in Slough, what time is it in Istanbul?
At 6:00 PM in Slough, clocks in Istanbul show 8:00 PM.
When is a good time to call Istanbul from Slough?
Between 9:00 AM and 4:00 PM in Slough – that is 11:00 AM to 6:00 PM in Istanbul – both places are within working hours (9:00 AM–6:00 PM).
When is it already the next day in Istanbul?
From 10:00 PM in Slough it is already the next day in Istanbul. The other way round, until 2:00 AM in Istanbul it is still the previous day in Slough.
Does the time difference between Slough and Istanbul change?
Yes. The clocks change only in Slough. From October 25, 2026, Istanbul will be 3 hours ahead of Slough.
