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Global ClockTime zone converter & meeting planner
SETTINGS
Clock
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 Colombo vs Istanbul

Colombo keeps IST (UTC+5:30) and Istanbul keeps UTC+3 (UTC+3) today. Istanbul is 2½ hours behind Colombo; 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: 09:00–16:00 in Istanbul (11:00–18:00 your time).

Colombo and Istanbul hour by hour, with the working-hour overlap shaded
City00:00 in Colombo01:00 in Colombo02:00 in Colombo03:00 in Colombo04:00 in Colombo05:00 in Colombo06:00 in Colombo07:00 in Colombo08:00 in Colombo09:00 in Colombo10:00 in Colombo11:00 in Colombo12:00 in Colombo13:00 in Colombo14:00 in Colombo15:00 in Colombo16:00 in Colombo17:00 in Colombo18:00 in Colombo19:00 in Colombo20:00 in Colombo21:00 in Colombo22:00 in Colombo23:00 in Colombo
Colombo——000102030405060708091011121314151617181920212223
Istanbul——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Colombo and Istanbul

Best hours to call

11:00 in Colombo
Inside working hours on both sides
09:00 in Istanbul
12:00 in Colombo
Inside working hours on both sides
10:00 in Istanbul
13:00 in Colombo
Inside working hours on both sides
11:00 in Istanbul
14:00 in Colombo
Inside working hours on both sides
12:00 in Istanbul

Where daylight saving pulls them apart

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

Also useful

Common questions

How many hours ahead is Istanbul of Colombo?

Istanbul is 2½ hours behind Colombo right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Colombo and Istanbul?

Any hour in 11:00–18:00 Colombo time is inside working hours in both cities.

Do Colombo and Istanbul change clocks on the same date?

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