Kostroma to Sofia: time difference
Sofia is 1 h behind Kostroma. 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.
Kostroma 06:59 6:59 AM Sofia 05:59 5:59 AM You –:–
06:59 6:59 AM
Moscow Standard Time · UTC+3
☀️ 07:41 · 🌙 16:21
05:59 5:59 AM
Eastern European Standard Time · UTC+2
☀️ 07:07 · 🌙 17:15
·
−1 h
Sofia is 1 h behind Kostroma.
When you, Kostroma and Sofia are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇷🇺 Kostroma
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
🇧🇬 Sofia
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 | 🇷🇺 Kostroma | 🇧🇬 Sofia |
|---|---|---|
| Local time | 06:59 | 05:59 |
| Local date | Friday, November 6, 2026 | Friday, November 6, 2026 |
| Time zone | Moscow Standard Time | Eastern European Standard Time |
| UTC offset | UTC+3 | UTC+2 |
| Offset from Kostroma | — | −1 h |
| IANA zone | Europe/Moscow | Europe/Sofia |
| Daylight saving | Not observed | On standard time → UTC+3, Mar 28, 04:00 |
| Sunrise | 07:41 | 07:07 |
| Sunset | 16:21 | 17:15 |
| Daylight | 8 h 40 min | 10 h 8 min |
| People on this clock | 277,393 | 1,286,383 |
Compare Kostroma with another city
More comparisons with Kostroma: the time zones next to it and the far side of the clock.
Big time differences
Kostroma and Sofia: common questions
How many hours behind Kostroma is Sofia?
The clocks in Sofia are 1 hour behind those in Kostroma (UTC+2 and UTC+3).
What time is it in Sofia at the start of the working day in Kostroma?
The working day in Kostroma starts at 9:00 AM; in Sofia it is 8:00 AM at that moment.
What time is it in Sofia when it is 6:00 PM in Kostroma?
When it is 6:00 PM in Kostroma, it is 5:00 PM in Sofia.
When is a good time to call Sofia from Kostroma?
Between 10:00 AM and 6:00 PM in Kostroma – that is 9:00 AM to 5:00 PM in Sofia – both places are within working hours (9:00 AM–6:00 PM).
Until what time in Kostroma is it still yesterday in Sofia?
Before 1:00 AM in Kostroma, the date in Sofia has not changed yet. From 11:00 PM in Sofia, it is already the next day in Kostroma.
Does the time difference between Kostroma and Sofia change?
Yes. The clocks change only in Sofia. From March 28, 2027, Sofia and Kostroma will have the same time.
