Shanghai to Seongnam: time difference
Seongnam is 1 h ahead of Shanghai. 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.
Shanghai 01:13 1:13 AM Seongnam 02:13 2:13 AM You –:–
01:13 1:13 AM
China Standard Time · UTC+8
☀️ 05:59 · 🌙 17:21
02:13 2:13 AM
Korean Standard Time · UTC+9
☀️ 06:42 · 🌙 17:52
·
+1 h
Seongnam is 1 h ahead of Shanghai.
When you, Shanghai and Seongnam are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇨🇳 Shanghai
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
🇰🇷 Seongnam
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 | 🇨🇳 Shanghai | 🇰🇷 Seongnam |
|---|---|---|
| Local time | 01:13 | 02:13 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | China Standard Time | Korean Standard Time |
| UTC offset | UTC+8 | UTC+9 |
| Offset from Shanghai | — | +1 h |
| IANA zone | Asia/Shanghai | Asia/Seoul |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:59 | 06:42 |
| Sunset | 17:21 | 17:52 |
| Daylight | 11 h 22 min | 11 h 10 min |
| People on this clock | 24,870,895 | 967,510 |
Compare Shanghai with another city
More comparisons with Shanghai: the time zones next to it and the far side of the clock.
Big time differences
Shanghai and Seongnam: common questions
How far ahead of Shanghai is Seongnam?
Seongnam is 1 hour ahead of Shanghai: UTC+9 against UTC+8.
What time is it in Seongnam when it is 9:00 AM in Shanghai?
When it is 9:00 AM in Shanghai, it is 10:00 AM in Seongnam.
What time is it in Seongnam at the end of the working day in Shanghai?
The working day in Shanghai ends at 6:00 PM; in Seongnam it is 7:00 PM at that moment.
When do working hours in Shanghai and in Seongnam overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 5:00 PM in Shanghai, which is 10:00 AM to 6:00 PM in Seongnam.
When is it already the next day in Seongnam?
From 11:00 PM in Shanghai it is already the next day in Seongnam. The other way round, until 1:00 AM in Seongnam it is still the previous day in Shanghai.
Is the time difference between Shanghai and Seongnam the same all year?
Yes. Neither Shanghai nor Seongnam switches to summer time, so the gap is always 1 hour.
