Time in Sejong vs Istanbul
Sejong keeps KST (UTC+9) and Istanbul keeps UTC+3 (UTC+3) today. Istanbul is 6 hours behind Sejong; 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: 09:00–12:00 in Istanbul (15:00–18:00 your time).
| City | 00:00 in Sejong | 01:00 in Sejong | 02:00 in Sejong | 03:00 in Sejong | 04:00 in Sejong | 05:00 in Sejong | 06:00 in Sejong | 07:00 in Sejong | 08:00 in Sejong | 09:00 in Sejong | 10:00 in Sejong | 11:00 in Sejong | 12:00 in Sejong | 13:00 in Sejong | 14:00 in Sejong | 15:00 in Sejong | 16:00 in Sejong | 17:00 in Sejong | 18:00 in Sejong | 19:00 in Sejong | 20:00 in Sejong | 21:00 in Sejong | 22:00 in Sejong | 23:00 in Sejong |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Sejong—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Istanbul—— | 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 Sejong and Istanbul
Best hours to call
15:00 in Sejong
Inside working hours on both sides
09:00 in Istanbul
16:00 in Sejong
Inside working hours on both sides
10:00 in Istanbul
17:00 in Sejong
Inside working hours on both sides
11:00 in Istanbul
Where daylight saving pulls them apart
Neither Sejong nor Istanbul changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Istanbul of Sejong?
Istanbul is 6 hours behind Sejong right now. The gap is not fixed: it moves whenever either side changes its clocks.
What is the best time to call between Sejong and Istanbul?
Any hour in 15:00–18:00 Sejong time is inside working hours in both cities.
Do Sejong and Istanbul change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.