Istanbul to Heidelberg: time difference
Heidelberg is 1 h behind Istanbul. Live clocks for both, the working hours they share, and how each one sits against your own time.
−1 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Istanbul 06:46 6:46 AM Heidelberg 05:46 5:46 AM You –:–
06:46 6:46 AM
GMT+03:00 · UTC+3
☀️ 07:10 · 🌙 18:33
05:46 5:46 AM
Central European Summer Time · UTC+2
☀️ 07:39 · 🌙 18:47
·
−1 h
Heidelberg is 1 h behind Istanbul.
When you, Istanbul and Heidelberg 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
🇩🇪 Heidelberg
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 22 10 PM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇹🇷 Istanbul | 🇩🇪 Heidelberg |
|---|---|---|
| Local time | 06:46 | 05:46 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | GMT+03:00 | Central European Summer Time |
| UTC offset | UTC+3 | UTC+2 |
| Offset from Istanbul | — | −1 h |
| IANA zone | Europe/Istanbul | Europe/Berlin |
| Daylight saving | Not observed | On summer time → UTC+1, Oct 25, 02:00 |
| Sunrise | 07:10 | 07:39 |
| Sunset | 18:33 | 18:47 |
| Daylight | 11 h 23 min | 11 h 9 min |
| People on this clock | 15,701,602 | 152,113 |
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 Heidelberg: common questions
How far behind Istanbul is Heidelberg?
Heidelberg is 1 hour behind Istanbul: UTC+2 against UTC+3.
What time is it in Heidelberg at the start of the working day in Istanbul?
The working day in Istanbul starts at 9:00 AM; in Heidelberg it is 8:00 AM at that moment.
What time is it in Heidelberg when it is 6:00 PM in Istanbul?
When it is 6:00 PM in Istanbul, it is 5:00 PM in Heidelberg.
When is a good time to call Heidelberg from Istanbul?
Between 10:00 AM and 6:00 PM in Istanbul – that is 9:00 AM to 5:00 PM in Heidelberg – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Heidelberg compared with Istanbul?
The new day starts in Heidelberg later: until 1:00 AM in Istanbul, it is still the previous day there. From 11:00 PM in Heidelberg, Istanbul is already on the next day.
Is the time difference between Istanbul and Heidelberg the same all year?
No. Only Heidelberg switches to summer time, so the gap changes twice a year. From October 25, 2026, Heidelberg will be 2 hours behind Istanbul.
