Sumy to Istanbul: time difference
Istanbul is 1 h ahead of Sumy. 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.
Sumy 08:21 8:21 AM Istanbul 09:21 9:21 AM You –:–
08:21 8:21 AM
Eastern European Standard Time · UTC+2
☀️ 06:41 · 🌙 16:09
09:21 9:21 AM
Türkiye Standard Time · UTC+3
☀️ 07:41 · 🌙 17:56
·
+1 h
Istanbul is 1 h ahead of Sumy.
When you, Sumy 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
🇺🇦 Sumy
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 | 🇺🇦 Sumy | 🇹🇷 Istanbul |
|---|---|---|
| Local time | 08:21 | 09:21 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Eastern European Standard Time | Türkiye Standard Time |
| UTC offset | UTC+2 | UTC+3 |
| Offset from Sumy | — | +1 h |
| IANA zone | Europe/Kyiv | Europe/Istanbul |
| Daylight saving | On standard time → UTC+3, Mar 28, 04:00 | Not observed |
| Sunrise | 06:41 | 07:41 |
| Sunset | 16:09 | 17:56 |
| Daylight | 9 h 27 min | 10 h 15 min |
| People on this clock | 267,633 | 15,701,602 |
Compare Sumy with another city
More comparisons with Sumy: the time zones next to it and the far side of the clock.
Big time differences
Sumy and Istanbul: common questions
What is the time difference between Sumy and Istanbul?
Istanbul is 1 hour ahead: it uses UTC+3, while Sumy is on UTC+2.
If it is 9:00 AM in Sumy, what time is it in Istanbul?
At 9:00 AM in Sumy, clocks in Istanbul show 10:00 AM.
If it is 6:00 PM in Sumy, what time is it in Istanbul?
At 6:00 PM in Sumy, clocks in Istanbul show 7:00 PM.
Is there a time when both Sumy and Istanbul are at work?
Yes: from 9:00 AM to 5:00 PM in Sumy (10:00 AM to 6:00 PM in Istanbul), the working days (9:00 AM–6:00 PM) overlap.
From what time in Sumy is it tomorrow in Istanbul?
Once it is 11:00 PM in Sumy, the date in Istanbul has already changed. Until 1:00 AM in Istanbul, it is still the previous day in Sumy.
Is the time difference between Sumy and Istanbul the same all year?
No. Only Sumy switches to summer time, so the gap changes twice a year. From March 28, 2027, Istanbul and Sumy will have the same time.
