Istanbul to Constanta: time difference
Constanta 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 05:16 5:16 AM Constanta 04:16 4:16 AM You –:–
05:16 5:16 AM
Türkiye Standard Time · UTC+3
☀️ 07:41 · 🌙 17:56
04:16 4:16 AM
Eastern European Standard Time · UTC+2
☀️ 06:49 · 🌙 16:51
·
−1 h
Constanta is 1 h behind Istanbul.
When you, Istanbul and Constanta 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
🇷🇴 Constanta
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 | 🇷🇴 Constanta |
|---|---|---|
| Local time | 05:16 | 04:16 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Türkiye Standard Time | Eastern European Standard Time |
| UTC offset | UTC+3 | UTC+2 |
| Offset from Istanbul | — | −1 h |
| IANA zone | Europe/Istanbul | Europe/Bucharest |
| Daylight saving | Not observed | On standard time → UTC+3, Mar 28, 04:00 |
| Sunrise | 07:41 | 06:49 |
| Sunset | 17:56 | 16:51 |
| Daylight | 10 h 15 min | 10 h 1 min |
| People on this clock | 15,701,602 | 283,872 |
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 Constanta: common questions
How many hours behind Istanbul is Constanta?
The clocks in Constanta are 1 hour behind those in Istanbul (UTC+2 and UTC+3).
What time is it in Constanta when it is 9:00 AM in Istanbul?
When it is 9:00 AM in Istanbul, it is 8:00 AM in Constanta.
What time is it in Constanta at the end of the working day in Istanbul?
The working day in Istanbul ends at 6:00 PM; in Constanta it is 5:00 PM at that moment.
When do working hours in Istanbul and in Constanta 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 Constanta.
When is it still the previous day in Constanta?
Until 1:00 AM in Istanbul it is still the previous day in Constanta. The other way round, from 11:00 PM in Constanta it is already the next day in Istanbul.
Is the time difference between Istanbul and Constanta the same all year?
No. Only Constanta switches to summer time, so the gap changes twice a year. From March 28, 2027, Constanta and Istanbul will have the same time.
