Constanta to Istanbul: time difference
Istanbul is 1 h ahead of Constanta. 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.
Constanta 21:45 9:45 PM Istanbul 22:45 10:45 PM You –:–
21:45 9:45 PM
Eastern European Standard Time · UTC+2
☀️ 06:48 · 🌙 16:52
22:45 10:45 PM
Türkiye Standard Time · UTC+3
☀️ 07:40 · 🌙 17:57
·
+1 h
Istanbul is 1 h ahead of Constanta.
When you, Constanta 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
🇷🇴 Constanta
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 | 🇷🇴 Constanta | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 21:45 | 22:45 |
| Local date | Thursday, November 5, 2026 | Thursday, November 5, 2026 |
| Time zone | Eastern European Standard Time | Türkiye Standard Time |
| UTC offset | UTC+2 | UTC+3 |
| Offset from Constanta | — | +1 h |
| IANA zone | Europe/Bucharest | Europe/Istanbul |
| Daylight saving | On standard time → UTC+3, Mar 28, 04:00 | Not observed |
| Sunrise | 06:48 | 07:40 |
| Sunset | 16:52 | 17:57 |
| Daylight | 10 h 4 min | 10 h 17 min |
| People on this clock | 283,872 | 15,701,602 |
Compare Constanta with another city
More comparisons with Constanta: the time zones next to it and the far side of the clock.
Big time differences
Constanta and Istanbul: common questions
What is the time difference between Constanta and Istanbul?
Istanbul is 1 hour ahead: it uses UTC+3, while Constanta is on UTC+2.
If it is 9:00 AM in Constanta, what time is it in Istanbul?
At 9:00 AM in Constanta, clocks in Istanbul show 10:00 AM.
What time is it in Istanbul when it is 6:00 PM in Constanta?
When it is 6:00 PM in Constanta, it is 7:00 PM in Istanbul.
When is a good time to call Istanbul from Constanta?
Between 9:00 AM and 5:00 PM in Constanta – that is 10:00 AM to 6:00 PM in Istanbul – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Istanbul compared with Constanta?
The new day starts in Istanbul earlier: at 11:00 PM in Constanta it is already midnight there. Until 1:00 AM in Istanbul, Constanta is still on the previous day.
Does the time gap between Constanta and Istanbul change during the year?
Yes – daylight saving time is used in Constanta but not in Istanbul. From March 28, 2027, Istanbul and Constanta will have the same time.
