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Global ClockTime zone converter & meeting planner
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SETTINGS
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Working hours
Start
09
End
18
Theme

AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Jeju City vs Istanbul

Jeju City keeps KST (UTC+9) and Istanbul keeps UTC+3 (UTC+3) today. Istanbul is 6 hours behind Jeju City; 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).

Jeju City and Istanbul hour by hour, with the working-hour overlap shaded
City00:00 in Jeju City01:00 in Jeju City02:00 in Jeju City03:00 in Jeju City04:00 in Jeju City05:00 in Jeju City06:00 in Jeju City07:00 in Jeju City08:00 in Jeju City09:00 in Jeju City10:00 in Jeju City11:00 in Jeju City12:00 in Jeju City13:00 in Jeju City14:00 in Jeju City15:00 in Jeju City16:00 in Jeju City17:00 in Jeju City18:00 in Jeju City19:00 in Jeju City20:00 in Jeju City21:00 in Jeju City22:00 in Jeju City23:00 in Jeju City
Jeju City——000102030405060708091011121314151617181920212223
Istanbul——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Jeju City and Istanbul

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Jeju City, Istanbul and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

15:00 in Jeju City
Inside working hours on both sides
09:00 in Istanbul
16:00 in Jeju City
Inside working hours on both sides
10:00 in Istanbul
17:00 in Jeju City
Inside working hours on both sides
11:00 in Istanbul

Where daylight saving pulls them apart

Neither Jeju City nor Istanbul changes its clocks, so the gap above holds all year.

Also useful

Common questions

How many hours ahead is Istanbul of Jeju City?

Istanbul is 6 hours behind Jeju City right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Jeju City and Istanbul?

Any hour in 15:00–18:00 Jeju City time is inside working hours in both cities.

Do Jeju City and Istanbul change clocks on the same date?

Neither city changes its clocks, so the gap between them never moves.