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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 Chennai vs Busan

Chennai keeps IST (UTC+5:30) and Busan keeps KST (UTC+9) today. Busan is 3½ hours ahead of Chennai; 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 Busan (09:00–14:00 your time).

Chennai and Busan hour by hour, with the working-hour overlap shaded
City00:00 in Chennai01:00 in Chennai02:00 in Chennai03:00 in Chennai04:00 in Chennai05:00 in Chennai06:00 in Chennai07:00 in Chennai08:00 in Chennai09:00 in Chennai10:00 in Chennai11:00 in Chennai12:00 in Chennai13:00 in Chennai14:00 in Chennai15:00 in Chennai16:00 in Chennai17:00 in Chennai18:00 in Chennai19:00 in Chennai20:00 in Chennai21:00 in Chennai22:00 in Chennai23:00 in Chennai
Chennai——000102030405060708091011121314151617181920212223
Busan——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Chennai and Busan

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

Best hours to call

09:00 in Chennai
Inside working hours on both sides
13:00 in Busan
10:00 in Chennai
Inside working hours on both sides
14:00 in Busan
11:00 in Chennai
Inside working hours on both sides
15:00 in Busan
12:00 in Chennai
Inside working hours on both sides
16:00 in Busan

Where daylight saving pulls them apart

Neither Chennai nor Busan changes its clocks, so the gap above holds all year.

Also useful

Common questions

How many hours ahead is Busan of Chennai?

Busan is 3½ hours ahead of Chennai right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Chennai and Busan?

Any hour in 09:00–14:00 Chennai time is inside working hours in both cities.

Do Chennai and Busan change clocks on the same date?

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