Time in Busan vs Tehran
Busan keeps KST (UTC+9) and Tehran keeps UTC+3:30 (UTC+3:30) today. Tehran is 5½ hours behind Busan; 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: 09:00–13:00 in Tehran (14:00–18:00 your time).
| City | 00:00 in Busan | 01:00 in Busan | 02:00 in Busan | 03:00 in Busan | 04:00 in Busan | 05:00 in Busan | 06:00 in Busan | 07:00 in Busan | 08:00 in Busan | 09:00 in Busan | 10:00 in Busan | 11:00 in Busan | 12:00 in Busan | 13:00 in Busan | 14:00 in Busan | 15:00 in Busan | 16:00 in Busan | 17:00 in Busan | 18:00 in Busan | 19:00 in Busan | 20:00 in Busan | 21:00 in Busan | 22:00 in Busan | 23:00 in Busan |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Busan—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Tehran—— | 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 Busan and Tehran
Best hours to call
14:00 in Busan
Inside working hours on both sides
09:00 in Tehran
15:00 in Busan
Inside working hours on both sides
10:00 in Tehran
16:00 in Busan
Inside working hours on both sides
11:00 in Tehran
17:00 in Busan
Inside working hours on both sides
12:00 in Tehran
Where daylight saving pulls them apart
Neither Busan nor Tehran changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Tehran of Busan?
Tehran is 5½ hours behind Busan right now. The gap is not fixed: it moves whenever either side changes its clocks.
What is the best time to call between Busan and Tehran?
Any hour in 14:00–18:00 Busan time is inside working hours in both cities.
Do Busan and Tehran change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.