Seoul to Zhangjiagang: time difference
Zhangjiagang is 1 h behind Seoul. Live clocks for both, the working hours they share, and how each one sits against your own time.
−1 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Seoul 17:58 5:58 PM Zhangjiagang 16:58 4:58 PM You –:–
17:58 5:58 PM
Korean Standard Time · UTC+9
☀️ 06:40 · 🌙 17:57
16:58 4:58 PM
China Standard Time · UTC+8
☀️ 06:01 · 🌙 17:27
·
−1 h
Zhangjiagang is 1 h behind Seoul.
When you, Seoul and Zhangjiagang 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
🇨🇳 Zhangjiagang
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 | 🇨🇳 Zhangjiagang |
|---|---|---|
| Local time | 17:58 | 16:58 |
| Local date | Thursday, October 15, 2026 | Thursday, October 15, 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 | 06:40 | 06:01 |
| Sunset | 17:57 | 17:27 |
| Daylight | 11 h 17 min | 11 h 26 min |
| People on this clock | 9,509,458 | 1,432,044 |
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 Zhangjiagang: common questions
What is the time difference between Seoul and Zhangjiagang?
Zhangjiagang is 1 hour behind: it uses UTC+8, while Seoul is on UTC+9.
If it is 9:00 AM in Seoul, what time is it in Zhangjiagang?
At 9:00 AM in Seoul, clocks in Zhangjiagang show 8:00 AM.
If it is 6:00 PM in Seoul, what time is it in Zhangjiagang?
At 6:00 PM in Seoul, clocks in Zhangjiagang show 5:00 PM.
When is a good time to call Zhangjiagang from Seoul?
Between 10:00 AM and 6:00 PM in Seoul – that is 9:00 AM to 5:00 PM in Zhangjiagang – both places are within working hours (9:00 AM–6:00 PM).
When does the date change in Zhangjiagang compared with Seoul?
The new day starts in Zhangjiagang later: until 1:00 AM in Seoul, it is still the previous day there. From 11:00 PM in Zhangjiagang, Seoul is already on the next day.
Does the time gap between Seoul and Zhangjiagang change during the year?
No, the clocks change neither in Seoul nor in Zhangjiagang, so the gap is 1 hour all year round.
