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09
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18
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AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Hassan vs Istanbul

Hassan keeps IST (UTC+5:30) and Istanbul keeps UTC+3 (UTC+3) today. Istanbul is 2½ hours behind Hassan; 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).

Hassan and Istanbul hour by hour, with the working-hour overlap shaded
City00:00 in Hassan01:00 in Hassan02:00 in Hassan03:00 in Hassan04:00 in Hassan05:00 in Hassan06:00 in Hassan07:00 in Hassan08:00 in Hassan09:00 in Hassan10:00 in Hassan11:00 in Hassan12:00 in Hassan13:00 in Hassan14:00 in Hassan15:00 in Hassan16:00 in Hassan17:00 in Hassan18:00 in Hassan19:00 in Hassan20:00 in Hassan21:00 in Hassan22:00 in Hassan23:00 in Hassan
Hassan——000102030405060708091011121314151617181920212223
Istanbul——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Hassan 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 Hassan, Istanbul and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

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

Where daylight saving pulls them apart

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

Also useful

Common questions

How many hours ahead is Istanbul of Hassan?

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

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

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

Do Hassan and Istanbul change clocks on the same date?

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