Live Synchronized Time Difference
SeoultoHangzhouTime Difference
🇰🇷
Seoul
South Korea (GMT+9)00:10:23UTC+9:00
🇨🇳
Hangzhou
China (GMT+8)23:10:23UTC+8:00
Direct Distance1,026 km (638 miles)
Estimated Flight Time~1.7 hours
Business Overlap7 overlapping hours (9am–5pm)
Mutual Working Window: 7 Overlapping Hours
Recommended calling window between Seoul and Hangzhou
Off-Peak Calling Window
Seoul Time
10:00 AM – 5:00 PM
Hangzhou Time
9:00 AM – 4:00 PM
Both locations share 7 overlapping standard business hours (9:00 AM – 5:00 PM). This is the premier window for real-time video conferences, corporate calls, and instant collaboration without outside-hours disruption.
24-Hour Schedule Conversion Matrix
Compare every hour of the day between Seoul and Hangzhou.
Work (9am-5pm)ShoulderSleep / Off
| Seoul Time (South Korea) | Hangzhou Time (China) | Status & Recommendation |
|---|---|---|
| 00:00AM | 23:00PM-1 day | ⚪ Outside Work Hours |
| 01:00AM | 00:00AM | ⚪ Outside Work Hours |
| 02:00AM | 01:00AM | ⚪ Outside Work Hours |
| 03:00AM | 02:00AM | ⚪ Outside Work Hours |
| 04:00AM | 03:00AM | ⚪ Outside Work Hours |
| 05:00AM | 04:00AM | ⚪ Outside Work Hours |
| 06:00AM | 05:00AM | ⚪ Outside Work Hours |
| 07:00AM | 06:00AM | ⚪ Outside Work Hours |
| 08:00AM | 07:00AM | ⚪ Outside Work Hours |
| 09:00AM | 08:00AM | 🟡 Feasible (Shoulder Hour) |
| 10:00AM | 09:00AM | 🟢 Ideal Meeting Window |
| 11:00AM | 10:00AM | 🟢 Ideal Meeting Window |
| 12:00PM | 11:00AM | 🟢 Ideal Meeting Window |
| 13:00PM | 12:00PM | 🟢 Ideal Meeting Window |
| 14:00PM | 13:00PM | 🟢 Ideal Meeting Window |
| 15:00PM | 14:00PM | 🟢 Ideal Meeting Window |
| 16:00PM | 15:00PM | 🟢 Ideal Meeting Window |
| 17:00PM | 16:00PM | ⚪ Outside Work Hours |
| 18:00PM | 17:00PM | ⚪ Outside Work Hours |
| 19:00PM | 18:00PM | ⚪ Outside Work Hours |
| 20:00PM | 19:00PM | ⚪ Outside Work Hours |
| 21:00PM | 20:00PM | ⚪ Outside Work Hours |
| 22:00PM | 21:00PM | ⚪ Outside Work Hours |
| 23:00PM | 22:00PM | ⚪ Outside Work Hours |
Frequently Asked Questions
What is the time difference between Seoul and Hangzhou?
Hangzhou is 1 hour behind Seoul.
What is the best time to schedule a cross-border meeting between Seoul and Hangzhou?
There are 7 overlapping standard business hours (09:00 - 17:00) between Seoul and Hangzhou. The optimal window is when both parties are in their core working shifts.
Does daylight saving time (DST) affect the time difference between Seoul and Hangzhou?
Yes. If either South Korea or China observes seasonal Daylight Saving Time transitions, the offset difference shifts by one hour on scheduled transition dates.