Ostia to Istanbul: time difference
Istanbul is 1 h ahead of Ostia. 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.
Ostia 03:59 3:59 AM Istanbul 04:59 4:59 AM You –:–
03:59 3:59 AM
Central European Summer Time · UTC+2
☀️ 07:29 · 🌙 18:24
04:59 4:59 AM
GMT+03:00 · UTC+3
☀️ 07:21 · 🌙 18:18
·
+1 h
Istanbul is 1 h ahead of Ostia.
When you, Ostia 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
🇮🇹 Ostia
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 | 🇮🇹 Ostia | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 03:59 | 04:59 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Central European Summer Time | GMT+03:00 |
| UTC offset | UTC+2 | UTC+3 |
| Offset from Ostia | — | +1 h |
| IANA zone | Europe/Rome | Europe/Istanbul |
| Daylight saving | On summer time → UTC+1, Oct 25, 02:00 | Not observed |
| Sunrise | 07:29 | 07:21 |
| Sunset | 18:24 | 18:18 |
| Daylight | 10 h 55 min | 10 h 57 min |
| People on this clock | 79,400 | 15,701,602 |
Compare Ostia with another city
More comparisons with Ostia: the time zones next to it and the far side of the clock.
Big time differences
Ostia and Istanbul: common questions
What is the time difference between Ostia and Istanbul?
Istanbul is 1 hour ahead: it uses UTC+3, while Ostia is on UTC+2.
What time is it in Istanbul at the start of the working day in Ostia?
The working day in Ostia starts at 9:00 AM; in Istanbul it is 10:00 AM at that moment.
What time is it in Istanbul when it is 6:00 PM in Ostia?
When it is 6:00 PM in Ostia, it is 7:00 PM in Istanbul.
When is a good time to call Istanbul from Ostia?
Between 9:00 AM and 5:00 PM in Ostia – 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 Ostia?
The new day starts in Istanbul earlier: at 11:00 PM in Ostia it is already midnight there. Until 1:00 AM in Istanbul, Ostia is still on the previous day.
Is the time difference between Ostia and Istanbul the same all year?
No. Only Ostia switches to summer time, so the gap changes twice a year. From October 25, 2026, Istanbul will be 2 hours ahead of Ostia.
