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