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