Jeju to Shanghai: time difference
Shanghai is 1 h behind Jeju. 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.
Jeju 19:21 7:21 PM Shanghai 18:21 6:21 PM You –:–
19:21 7:21 PM
Korean Standard Time · UTC+9
☀️ 06:35 · 🌙 18:09
18:21 6:21 PM
China Standard Time · UTC+8
☀️ 05:54 · 🌙 17:30
·
−1 h
Shanghai is 1 h behind Jeju.
When you, Jeju 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
🇰🇷 Jeju
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 | 🇰🇷 Jeju | 🇨🇳 Shanghai |
|---|---|---|
| Local time | 19:21 | 18:21 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Korean Standard Time | China Standard Time |
| UTC offset | UTC+9 | UTC+8 |
| Offset from Jeju | — | −1 h |
| IANA zone | Asia/Seoul | Asia/Shanghai |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:35 | 05:54 |
| Sunset | 18:09 | 17:30 |
| Daylight | 11 h 34 min | 11 h 36 min |
| People on this clock | 469,279 | 24,870,895 |
Compare Jeju with another city
More comparisons with Jeju: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Jeju and Shanghai: common questions
How far behind Jeju is Shanghai?
Shanghai is 1 hour behind Jeju: UTC+8 against UTC+9.
What time is it in Shanghai when it is 9:00 AM in Jeju?
When it is 9:00 AM in Jeju, it is 8:00 AM in Shanghai.
What time is it in Shanghai at the end of the working day in Jeju?
The working day in Jeju ends at 6:00 PM; in Shanghai it is 5:00 PM at that moment.
When do working hours in Jeju and in Shanghai overlap?
Working hours (9:00 AM–6:00 PM) overlap from 10:00 AM to 6:00 PM in Jeju, which is 9:00 AM to 5:00 PM in Shanghai.
When does the date change in Shanghai compared with Jeju?
The new day starts in Shanghai later: until 1:00 AM in Jeju, it is still the previous day there. From 11:00 PM in Shanghai, Jeju is already on the next day.
Is the time difference between Jeju and Shanghai the same all year?
Yes. Neither Jeju nor Shanghai switches to summer time, so the gap is always 1 hour.
