Istanbul to Tonsberg: time difference
Tonsberg 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 22:49 10:49 PM Tonsberg 21:49 9:49 PM You –:–
22:49 10:49 PM
GMT+03:00 · UTC+3
☀️ 07:21 · 🌙 18:18
21:49 9:49 PM
Central European Summer Time · UTC+2
☀️ 08:09 · 🌙 18:00
·
−1 h
Tonsberg is 1 h behind Istanbul.
When you, Istanbul and Tonsberg 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
🇳🇴 Tonsberg
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 | 🇳🇴 Tonsberg |
|---|---|---|
| Local time | 22:49 | 21:49 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 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/Oslo |
| Daylight saving | Not observed | On summer time → UTC+1, Oct 25, 02:00 |
| Sunrise | 07:21 | 08:09 |
| Sunset | 18:18 | 18:00 |
| Daylight | 10 h 57 min | 9 h 51 min |
| People on this clock | 15,701,602 | 59,237 |
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 Tonsberg: common questions
What is the time difference between Istanbul and Tonsberg?
Tonsberg is 1 hour behind: it uses UTC+2, while Istanbul is on UTC+3.
What time is it in Tonsberg at the start of the working day in Istanbul?
The working day in Istanbul starts at 9:00 AM; in Tonsberg it is 8:00 AM at that moment.
What time is it in Tonsberg at the end of the working day in Istanbul?
The working day in Istanbul ends at 6:00 PM; in Tonsberg it is 5:00 PM at that moment.
When do working hours in Istanbul and in Tonsberg overlap?
Working hours (9:00 AM–6:00 PM) overlap from 10:00 AM to 6:00 PM in Istanbul, which is 9:00 AM to 5:00 PM in Tonsberg.
When is it still the previous day in Tonsberg?
Until 1:00 AM in Istanbul it is still the previous day in Tonsberg. The other way round, from 11:00 PM in Tonsberg it is already the next day in Istanbul.
Does the time difference between Istanbul and Tonsberg change?
Yes. The clocks change only in Tonsberg. From October 25, 2026, Tonsberg will be 2 hours behind Istanbul.
