Yancheng to Seoul: time difference
Seoul is 1 h ahead of Yancheng. 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.
Yancheng 12:23 12:23 PM Seoul 13:23 1:23 PM You –:–
12:23 12:23 PM
China Standard Time · UTC+8
☀️ 06:08 · 🌙 17:22
13:23 1:23 PM
Korean Standard Time · UTC+9
☀️ 06:45 · 🌙 17:50
·
+1 h
Seoul is 1 h ahead of Yancheng.
When you, Yancheng and Seoul are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇨🇳 Yancheng
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
🇰🇷 Seoul
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 | 🇨🇳 Yancheng | 🇰🇷 Seoul |
|---|---|---|
| Local time | 12:23 | 13:23 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | China Standard Time | Korean Standard Time |
| UTC offset | UTC+8 | UTC+9 |
| Offset from Yancheng | — | +1 h |
| IANA zone | Asia/Shanghai | Asia/Seoul |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:08 | 06:45 |
| Sunset | 17:22 | 17:50 |
| Daylight | 11 h 14 min | 11 h 5 min |
| People on this clock | 7,260,240 | 9,509,458 |
Compare Yancheng with another city
More comparisons with Yancheng: the time zones next to it and the far side of the clock.
Big time differences
Yancheng and Seoul: common questions
How many hours ahead of Yancheng is Seoul?
The clocks in Seoul are 1 hour ahead of those in Yancheng (UTC+9 and UTC+8).
What time is it in Seoul when it is 9:00 AM in Yancheng?
When it is 9:00 AM in Yancheng, it is 10:00 AM in Seoul.
What time is it in Seoul when it is 6:00 PM in Yancheng?
When it is 6:00 PM in Yancheng, it is 7:00 PM in Seoul.
Is there a time when both Yancheng and Seoul are at work?
Yes: from 9:00 AM to 5:00 PM in Yancheng (10:00 AM to 6:00 PM in Seoul), the working days (9:00 AM–6:00 PM) overlap.
When is it already the next day in Seoul?
From 11:00 PM in Yancheng it is already the next day in Seoul. The other way round, until 1:00 AM in Seoul it is still the previous day in Yancheng.
Is the time difference between Yancheng and Seoul the same all year?
Yes. Neither Yancheng nor Seoul switches to summer time, so the gap is always 1 hour.
