🇬🇧 Hertfordshire, United Kingdom
21
- British Summer Time
- UTC+1
- Daytime
☀️ 07:20 · 🌙 18:16 · 10 h 55 min
Hertfordshire to Istanbul: time difference
Istanbul is 2 h ahead of Hertfordshire. 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.
Hertfordshire 16:45 4:45 PM Istanbul 18:45 6:45 PM You –:–
16:45 4:45 PM
British Summer Time · UTC+1
☀️ 07:20 · 🌙 18:16
18:45 6:45 PM
GMT+03:00 · UTC+3
☀️ 07:12 · 🌙 18:30
·
+2 h
Istanbul is 2 h ahead of Hertfordshire.
When you, Hertfordshire 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
🇬🇧 Hertfordshire
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
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 1 1 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇬🇧 Hertfordshire | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 16:45 | 18:45 |
| Local date | Monday, October 12, 2026 | Monday, October 12, 2026 |
| Time zone | British Summer Time | GMT+03:00 |
| UTC offset | UTC+1 | UTC+3 |
| Offset from Hertfordshire | — | +2 h |
| IANA zone | Europe/London | Europe/Istanbul |
| Daylight saving | On summer time → UTC+0, Oct 25, 01:00 | Not observed |
| Sunrise | 07:20 | 07:12 |
| Sunset | 18:16 | 18:30 |
| Daylight | 10 h 55 min | 11 h 18 min |
| People on this clock | 33,990 | 15,701,602 |
Compare Hertfordshire with another city
More comparisons with Hertfordshire: the time zones next to it and the far side of the clock.
Big time differences
Hertfordshire and Istanbul: common questions
How many hours ahead of Hertfordshire is Istanbul?
The clocks in Istanbul are 2 hours ahead of those in Hertfordshire (UTC+3 and UTC+1).
What time is it in Istanbul when it is 9:00 AM in Hertfordshire?
When it is 9:00 AM in Hertfordshire, it is 11:00 AM in Istanbul.
What time is it in Istanbul at the end of the working day in Hertfordshire?
The working day in Hertfordshire ends at 6:00 PM; in Istanbul it is 8:00 PM at that moment.
When is a good time to call Istanbul from Hertfordshire?
Between 9:00 AM and 4:00 PM in Hertfordshire – that is 11:00 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 Hertfordshire?
The new day starts in Istanbul earlier: at 10:00 PM in Hertfordshire it is already midnight there. Until 2:00 AM in Istanbul, Hertfordshire is still on the previous day.
Does the time gap between Hertfordshire and Istanbul change during the year?
Yes – daylight saving time is used in Hertfordshire but not in Istanbul. From October 25, 2026, Istanbul will be 3 hours ahead of Hertfordshire.
