Seongnam to Shanghai: time difference
Shanghai is 1 h behind Seongnam. 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.
Seongnam 21:08 9:08 PM Shanghai 20:08 8:08 PM You –:–
21:08 9:08 PM
Korean Standard Time · UTC+9
☀️ 06:41 · 🌙 17:54
20:08 8:08 PM
China Standard Time · UTC+8
☀️ 05:58 · 🌙 17:22
·
−1 h
Shanghai is 1 h behind Seongnam.
When you, Seongnam and Shanghai are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇰🇷 Seongnam
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
🇨🇳 Shanghai
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 | 🇰🇷 Seongnam | 🇨🇳 Shanghai |
|---|---|---|
| Local time | 21:08 | 20:08 |
| Local date | Saturday, October 17, 2026 | Saturday, October 17, 2026 |
| Time zone | Korean Standard Time | China Standard Time |
| UTC offset | UTC+9 | UTC+8 |
| Offset from Seongnam | — | −1 h |
| IANA zone | Asia/Seoul | Asia/Shanghai |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:41 | 05:58 |
| Sunset | 17:54 | 17:22 |
| Daylight | 11 h 12 min | 11 h 23 min |
| People on this clock | 967,510 | 24,870,895 |
Compare Seongnam with another city
More comparisons with Seongnam: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Seongnam and Shanghai: common questions
How many hours behind Seongnam is Shanghai?
The clocks in Shanghai are 1 hour behind those in Seongnam (UTC+8 and UTC+9).
What time is it in Shanghai when it is 9:00 AM in Seongnam?
When it is 9:00 AM in Seongnam, it is 8:00 AM in Shanghai.
If it is 6:00 PM in Seongnam, what time is it in Shanghai?
At 6:00 PM in Seongnam, clocks in Shanghai show 5:00 PM.
When do working hours in Seongnam and in Shanghai overlap?
Working hours (9:00 AM–6:00 PM) overlap from 10:00 AM to 6:00 PM in Seongnam, which is 9:00 AM to 5:00 PM in Shanghai.
When does the date change in Shanghai compared with Seongnam?
The new day starts in Shanghai later: until 1:00 AM in Seongnam, it is still the previous day there. From 11:00 PM in Shanghai, Seongnam is already on the next day.
Does the time difference between Seongnam and Shanghai change?
No. Neither place uses daylight saving time, so the difference stays 1 hour all year.
