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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 Kolkata vs Shenzhen

Kolkata keeps IST (UTC+5:30) and Shenzhen keeps CST (UTC+8) today. Shenzhen is 2½ hours ahead of Kolkata; 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: 12:00–18:00 in Shenzhen (09:00–15:00 your time).

Kolkata and Shenzhen hour by hour, with the working-hour overlap shaded
City00:00 in Kolkata01:00 in Kolkata02:00 in Kolkata03:00 in Kolkata04:00 in Kolkata05:00 in Kolkata06:00 in Kolkata07:00 in Kolkata08:00 in Kolkata09:00 in Kolkata10:00 in Kolkata11:00 in Kolkata12:00 in Kolkata13:00 in Kolkata14:00 in Kolkata15:00 in Kolkata16:00 in Kolkata17:00 in Kolkata18:00 in Kolkata19:00 in Kolkata20:00 in Kolkata21:00 in Kolkata22:00 in Kolkata23:00 in Kolkata
Kolkata——000102030405060708091011121314151617181920212223
Shenzhen——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Kolkata and Shenzhen

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

Best hours to call

09:00 in Kolkata
Inside working hours on both sides
12:00 in Shenzhen
10:00 in Kolkata
Inside working hours on both sides
13:00 in Shenzhen
11:00 in Kolkata
Inside working hours on both sides
14:00 in Shenzhen
12:00 in Kolkata
Inside working hours on both sides
15:00 in Shenzhen

Where daylight saving pulls them apart

Neither Kolkata nor Shenzhen changes its clocks, so the gap above holds all year.

Also useful

Common questions

How many hours ahead is Shenzhen of Kolkata?

Shenzhen is 2½ hours ahead of Kolkata right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Kolkata and Shenzhen?

Any hour in 09:00–15:00 Kolkata time is inside working hours in both cities.

Do Kolkata and Shenzhen change clocks on the same date?

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