Colleferro to Istanbul: time difference
Istanbul is 1 h ahead of Colleferro. 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.
Colleferro 03:42 3:42 AM Istanbul 04:42 4:42 AM You –:–
03:42 3:42 AM
Central European Summer Time · UTC+2
☀️ 07:25 · 🌙 18:22
04:42 4:42 AM
GMT+03:00 · UTC+3
☀️ 07:20 · 🌙 18:19
·
+1 h
Istanbul is 1 h ahead of Colleferro.
When you, Colleferro 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
🇮🇹 Colleferro
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 | 🇮🇹 Colleferro | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 03:42 | 04:42 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Central European Summer Time | GMT+03:00 |
| UTC offset | UTC+2 | UTC+3 |
| Offset from Colleferro | — | +1 h |
| IANA zone | Europe/Rome | Europe/Istanbul |
| Daylight saving | On summer time → UTC+1, Oct 25, 02:00 | Not observed |
| Sunrise | 07:25 | 07:20 |
| Sunset | 18:22 | 18:19 |
| Daylight | 10 h 57 min | 10 h 59 min |
| People on this clock | 21,595 | 15,701,602 |
Compare Colleferro with another city
More comparisons with Colleferro: the time zones next to it and the far side of the clock.
Big time differences
Colleferro and Istanbul: common questions
How many hours ahead of Colleferro is Istanbul?
The clocks in Istanbul are 1 hour ahead of those in Colleferro (UTC+3 and UTC+2).
What time is it in Istanbul when it is 9:00 AM in Colleferro?
When it is 9:00 AM in Colleferro, it is 10:00 AM in Istanbul.
What time is it in Istanbul at the end of the working day in Colleferro?
The working day in Colleferro ends at 6:00 PM; in Istanbul it is 7:00 PM at that moment.
When do working hours in Colleferro and in Istanbul overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 5:00 PM in Colleferro, which is 10:00 AM to 6:00 PM in Istanbul.
When is it already the next day in Istanbul?
From 11:00 PM in Colleferro it is already the next day in Istanbul. The other way round, until 1:00 AM in Istanbul it is still the previous day in Colleferro.
Does the time gap between Colleferro and Istanbul change during the year?
Yes – daylight saving time is used in Colleferro but not in Istanbul. From October 25, 2026, Istanbul will be 2 hours ahead of Colleferro.
