Time in Ulsan vs Buenos Aires
Ulsan keeps KST (UTC+9) and Buenos Aires keeps UTC−3 (UTC−3) today. Buenos Aires is 12 hours behind Ulsan; the rows below read both clocks live.
The working day, side by side
The working days do not meet. there is no working-hour overlap with Buenos Aires — the nearest workable window is 05:00–06:00 your time (17:00 there).
| 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 |
| Buenos Aires—— | 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 Buenos Aires
Best hours to call
there is no working-hour overlap with Buenos Aires — the nearest workable window is 05:00–06:00 your time (17:00 there).
Where daylight saving pulls them apart
Neither Ulsan nor Buenos Aires changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Buenos Aires of Ulsan?
Buenos Aires is 12 hours 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 Buenos Aires?
There is no hour inside working hours in both cities. 05:00–06:00 your time (17:00 there) is the cheapest compromise, and one side is taking a shoulder hour.
Do Ulsan and Buenos Aires change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.