Tbilisi to Kastamonu: time difference
Kastamonu is 1 h behind Tbilisi. 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.
Tbilisi 08:54 8:54 AM Kastamonu 07:54 7:54 AM You –:–
08:54 8:54 AM
Georgia Standard Time · UTC+4
☀️ 07:25 · 🌙 18:07
07:54 7:54 AM
GMT+03:00 · UTC+3
☀️ 07:08 · 🌙 17:51
·
−1 h
Kastamonu is 1 h behind Tbilisi.
When you, Tbilisi and Kastamonu are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇬🇪 Tbilisi
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
🇹🇷 Kastamonu
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 | 🇬🇪 Tbilisi | 🇹🇷 Kastamonu |
|---|---|---|
| Local time | 08:54 | 07:54 |
| Local date | Sunday, October 25, 2026 | Sunday, October 25, 2026 |
| Time zone | Georgia Standard Time | GMT+03:00 |
| UTC offset | UTC+4 | UTC+3 |
| Offset from Tbilisi | — | −1 h |
| IANA zone | Asia/Tbilisi | Europe/Istanbul |
| Daylight saving | Not observed | Not observed |
| Sunrise | 07:25 | 07:08 |
| Sunset | 18:07 | 17:51 |
| Daylight | 10 h 42 min | 10 h 43 min |
| People on this clock | 1,241,700 | 152,541 |
Compare Tbilisi with another city
More comparisons with Tbilisi: the time zones next to it and the far side of the clock.
Big time differences
Tbilisi and Kastamonu: common questions
What is the time difference between Tbilisi and Kastamonu?
Kastamonu is 1 hour behind: it uses UTC+3, while Tbilisi is on UTC+4.
What time is it in Kastamonu at the start of the working day in Tbilisi?
The working day in Tbilisi starts at 9:00 AM; in Kastamonu it is 8:00 AM at that moment.
What time is it in Kastamonu when it is 6:00 PM in Tbilisi?
When it is 6:00 PM in Tbilisi, it is 5:00 PM in Kastamonu.
Is there a time when both Tbilisi and Kastamonu are at work?
Yes: from 10:00 AM to 6:00 PM in Tbilisi (9:00 AM to 5:00 PM in Kastamonu), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Kastamonu compared with Tbilisi?
The new day starts in Kastamonu later: until 1:00 AM in Tbilisi, it is still the previous day there. From 11:00 PM in Kastamonu, Tbilisi is already on the next day.
Is the time difference between Tbilisi and Kastamonu the same all year?
Yes. Neither Tbilisi nor Kastamonu switches to summer time, so the gap is always 1 hour.
