Cologne to Istanbul: time difference
Istanbul is 1 h ahead of Cologne. 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.
Cologne 03:30 3:30 AM Istanbul 04:30 4:30 AM You –:–
03:30 3:30 AM
Central European Summer Time · UTC+2
☀️ 07:47 · 🌙 18:53
04:30 4:30 AM
GMT+03:00 · UTC+3
☀️ 07:10 · 🌙 18:33
·
+1 h
Istanbul is 1 h ahead of Cologne.
When you, Cologne 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
🇩🇪 Cologne
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
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 0 12 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇩🇪 Cologne | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 03:30 | 04:30 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Central European Summer Time | GMT+03:00 |
| UTC offset | UTC+2 | UTC+3 |
| Offset from Cologne | — | +1 h |
| IANA zone | Europe/Berlin | Europe/Istanbul |
| Daylight saving | On summer time → UTC+1, Oct 25, 02:00 | Not observed |
| Sunrise | 07:47 | 07:10 |
| Sunset | 18:53 | 18:33 |
| Daylight | 11 h 5 min | 11 h 23 min |
| People on this clock | 1,095,520 | 15,701,602 |
Compare Cologne with another city
More comparisons with Cologne: the time zones next to it and the far side of the clock.
Big time differences
Cologne and Istanbul: common questions
How many hours ahead of Cologne is Istanbul?
The clocks in Istanbul are 1 hour ahead of those in Cologne (UTC+3 and UTC+2).
What time is it in Istanbul at the start of the working day in Cologne?
The working day in Cologne starts at 9:00 AM; in Istanbul it is 10:00 AM at that moment.
What time is it in Istanbul at the end of the working day in Cologne?
The working day in Cologne ends at 6:00 PM; in Istanbul it is 7:00 PM at that moment.
When is a good time to call Istanbul from Cologne?
Between 9:00 AM and 5:00 PM in Cologne – that is 10:00 AM to 6:00 PM in Istanbul – both places are within working hours (9:00 AM–6:00 PM).
From what time in Cologne is it tomorrow in Istanbul?
Once it is 11:00 PM in Cologne, the date in Istanbul has already changed. Until 1:00 AM in Istanbul, it is still the previous day in Cologne.
Is the time difference between Cologne and Istanbul the same all year?
No. Only Cologne switches to summer time, so the gap changes twice a year. From October 25, 2026, Istanbul will be 2 hours ahead of Cologne.
