Time in Ulsan vs Guangzhou
Ulsan keeps KST (UTC+9) and Guangzhou keeps CST (UTC+8) today. Guangzhou is 1 hour behind Ulsan; the rows below read both clocks live.
The working day, side by side
Hours shaded in both rows are inside working hours in both cities: 09:00–17:00 in Guangzhou (10:00–18:00 your time).
| City | 00:00 in Ulsan | 01:00 in Ulsan | 02:00 in Ulsan | 03:00 in Ulsan | 04:00 in Ulsan | 05:00 in Ulsan | 06:00 in Ulsan | 07:00 in Ulsan | 08:00 in Ulsan | 09:00 in Ulsan | 10:00 in Ulsan | 11:00 in Ulsan | 12:00 in Ulsan | 13:00 in Ulsan | 14:00 in Ulsan | 15:00 in Ulsan | 16:00 in Ulsan | 17:00 in Ulsan | 18:00 in Ulsan | 19:00 in Ulsan | 20:00 in Ulsan | 21:00 in Ulsan | 22:00 in Ulsan | 23:00 in Ulsan |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ulsan—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Guangzhou—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
- Working hours
- Shoulder
- Night
- Overlap
Do more with Ulsan and Guangzhou
Best hours to call
10:00 in Ulsan
Inside working hours on both sides
09:00 in Guangzhou
11:00 in Ulsan
Inside working hours on both sides
10:00 in Guangzhou
12:00 in Ulsan
Inside working hours on both sides
11:00 in Guangzhou
13:00 in Ulsan
Inside working hours on both sides
12:00 in Guangzhou
Where daylight saving pulls them apart
Neither Ulsan nor Guangzhou changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Guangzhou of Ulsan?
Guangzhou is 1 hour behind Ulsan right now. The gap is not fixed: it moves whenever either side changes its clocks.
What is the best time to call between Ulsan and Guangzhou?
Any hour in 10:00–18:00 Ulsan time is inside working hours in both cities.
Do Ulsan and Guangzhou change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.