Seoul to Yancheng: time difference
Yancheng 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 12:04 12:04 PM Yancheng 11:04 11:04 AM You –:–
12:04 12:04 PM
Korean Standard Time · UTC+9
☀️ 06:45 · 🌙 17:50
11:04 11:04 AM
China Standard Time · UTC+8
☀️ 06:08 · 🌙 17:22
·
−1 h
Yancheng is 1 h behind Seoul.
When you, Seoul and Yancheng 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
🇨🇳 Yancheng
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 | 🇨🇳 Yancheng |
|---|---|---|
| Local time | 12:04 | 11:04 |
| Local date | Tuesday, October 20, 2026 | Tuesday, October 20, 2026 |
| Time zone | Korean Standard Time | China Standard Time |
| UTC offset | UTC+9 | UTC+8 |
| Offset from Seoul | — | −1 h |
| IANA zone | Asia/Seoul | Asia/Shanghai |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:45 | 06:08 |
| Sunset | 17:50 | 17:22 |
| Daylight | 11 h 5 min | 11 h 14 min |
| People on this clock | 9,509,458 | 7,260,240 |
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 Yancheng: common questions
How many hours behind Seoul is Yancheng?
The clocks in Yancheng are 1 hour behind those in Seoul (UTC+8 and UTC+9).
If it is 9:00 AM in Seoul, what time is it in Yancheng?
At 9:00 AM in Seoul, clocks in Yancheng show 8:00 AM.
If it is 6:00 PM in Seoul, what time is it in Yancheng?
At 6:00 PM in Seoul, clocks in Yancheng show 5:00 PM.
When do working hours in Seoul and in Yancheng overlap?
Working hours (9:00 AM–6:00 PM) overlap from 10:00 AM to 6:00 PM in Seoul, which is 9:00 AM to 5:00 PM in Yancheng.
Until what time in Seoul is it still yesterday in Yancheng?
Before 1:00 AM in Seoul, the date in Yancheng has not changed yet. From 11:00 PM in Yancheng, it is already the next day in Seoul.
Is the time difference between Seoul and Yancheng the same all year?
Yes. Neither Seoul nor Yancheng switches to summer time, so the gap is always 1 hour.
