Seoul to Ulan Ude: time difference
Ulan Ude is 1 h behind Seoul. 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.
Seoul 15:29 3:29 PM Ulan Ude 14:29 2:29 PM You –:–
15:29 3:29 PM
Korean Standard Time · UTC+9
☀️ 06:36 · 🌙 18:04
14:29 2:29 PM
Irkutsk Standard Time · UTC+8
☀️ 07:05 · 🌙 18:10
·
−1 h
Ulan Ude is 1 h behind Seoul.
When you, Seoul and Ulan Ude are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇰🇷 Seoul
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
🇷🇺 Ulan Ude
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 | 🇰🇷 Seoul | 🇷🇺 Ulan Ude |
|---|---|---|
| Local time | 15:29 | 14:29 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Korean Standard Time | Irkutsk Standard Time |
| UTC offset | UTC+9 | UTC+8 |
| Offset from Seoul | — | −1 h |
| IANA zone | Asia/Seoul | Asia/Irkutsk |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:36 | 07:05 |
| Sunset | 18:04 | 18:10 |
| Daylight | 11 h 29 min | 11 h 5 min |
| People on this clock | 9,509,458 | 436,138 |
Compare Seoul with another city
More comparisons with Seoul: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Seoul and Ulan Ude: common questions
How far behind Seoul is Ulan Ude?
Ulan Ude is 1 hour behind Seoul: UTC+8 against UTC+9.
If it is 9:00 AM in Seoul, what time is it in Ulan Ude?
At 9:00 AM in Seoul, clocks in Ulan Ude show 8:00 AM.
What time is it in Ulan Ude when it is 6:00 PM in Seoul?
When it is 6:00 PM in Seoul, it is 5:00 PM in Ulan Ude.
When is a good time to call Ulan Ude from Seoul?
Between 10:00 AM and 6:00 PM in Seoul – that is 9:00 AM to 5:00 PM in Ulan Ude – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in Ulan Ude?
Until 1:00 AM in Seoul it is still the previous day in Ulan Ude. The other way round, from 11:00 PM in Ulan Ude it is already the next day in Seoul.
Does the time gap between Seoul and Ulan Ude change during the year?
No, the clocks change neither in Seoul nor in Ulan Ude, so the gap is 1 hour all year round.
