Istanbul to Sumy: time difference
Sumy 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 07:05 7:05 AM Sumy 06:05 6:05 AM You –:–
07:05 7:05 AM
Türkiye Standard Time · UTC+3
☀️ 07:41 · 🌙 17:56
06:05 6:05 AM
Eastern European Standard Time · UTC+2
☀️ 06:41 · 🌙 16:09
·
−1 h
Sumy is 1 h behind Istanbul.
When you, Istanbul and Sumy 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
🇺🇦 Sumy
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 | 🇺🇦 Sumy |
|---|---|---|
| Local time | 07:05 | 06:05 |
| 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/Kyiv |
| Daylight saving | Not observed | On standard time → UTC+3, Mar 28, 04:00 |
| Sunrise | 07:41 | 06:41 |
| Sunset | 17:56 | 16:09 |
| Daylight | 10 h 15 min | 9 h 27 min |
| People on this clock | 15,701,602 | 267,633 |
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 Sumy: common questions
How many hours behind Istanbul is Sumy?
The clocks in Sumy are 1 hour behind those in Istanbul (UTC+2 and UTC+3).
What time is it in Sumy at the start of the working day in Istanbul?
The working day in Istanbul starts at 9:00 AM; in Sumy it is 8:00 AM at that moment.
What time is it in Sumy when it is 6:00 PM in Istanbul?
When it is 6:00 PM in Istanbul, it is 5:00 PM in Sumy.
Is there a time when both Istanbul and Sumy are at work?
Yes: from 10:00 AM to 6:00 PM in Istanbul (9:00 AM to 5:00 PM in Sumy), the working days (9:00 AM–6:00 PM) overlap.
Until what time in Istanbul is it still yesterday in Sumy?
Before 1:00 AM in Istanbul, the date in Sumy has not changed yet. From 11:00 PM in Sumy, it is already the next day in Istanbul.
Does the time difference between Istanbul and Sumy change?
Yes. The clocks change only in Sumy. From March 28, 2027, Sumy and Istanbul will have the same time.
