Time in Mumbai vs Osan
Mumbai keeps IST (UTC+5:30) and Osan keeps KST (UTC+9) today. Osan is 3½ hours ahead of Mumbai; 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: 13:00–18:00 in Osan (09:00–14:00 your time).
| City | 00:00 in Mumbai | 01:00 in Mumbai | 02:00 in Mumbai | 03:00 in Mumbai | 04:00 in Mumbai | 05:00 in Mumbai | 06:00 in Mumbai | 07:00 in Mumbai | 08:00 in Mumbai | 09:00 in Mumbai | 10:00 in Mumbai | 11:00 in Mumbai | 12:00 in Mumbai | 13:00 in Mumbai | 14:00 in Mumbai | 15:00 in Mumbai | 16:00 in Mumbai | 17:00 in Mumbai | 18:00 in Mumbai | 19:00 in Mumbai | 20:00 in Mumbai | 21:00 in Mumbai | 22:00 in Mumbai | 23:00 in Mumbai |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Mumbai—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Osan—— | 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 Mumbai and Osan
Best hours to call
09:00 in Mumbai
Inside working hours on both sides
13:00 in Osan
10:00 in Mumbai
Inside working hours on both sides
14:00 in Osan
11:00 in Mumbai
Inside working hours on both sides
15:00 in Osan
12:00 in Mumbai
Inside working hours on both sides
16:00 in Osan
Where daylight saving pulls them apart
Neither Mumbai nor Osan changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Osan of Mumbai?
Osan is 3½ hours ahead of Mumbai right now. The gap is not fixed: it moves whenever either side changes its clocks.
What is the best time to call between Mumbai and Osan?
Any hour in 09:00–14:00 Mumbai time is inside working hours in both cities.
Do Mumbai and Osan change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.