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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 Semnan vs Shanghai

Semnan keeps UTC+3:30 (UTC+3:30) and Shanghai keeps CST (UTC+8) today. Shanghai is 4½ hours ahead of Semnan; 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: 14:00–18:00 in Shanghai (09:00–13:00 your time).

Semnan and Shanghai hour by hour, with the working-hour overlap shaded
City00:00 in Semnan01:00 in Semnan02:00 in Semnan03:00 in Semnan04:00 in Semnan05:00 in Semnan06:00 in Semnan07:00 in Semnan08:00 in Semnan09:00 in Semnan10:00 in Semnan11:00 in Semnan12:00 in Semnan13:00 in Semnan14:00 in Semnan15:00 in Semnan16:00 in Semnan17:00 in Semnan18:00 in Semnan19:00 in Semnan20:00 in Semnan21:00 in Semnan22:00 in Semnan23:00 in Semnan
Semnan——000102030405060708091011121314151617181920212223
Shanghai——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Semnan and Shanghai

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

Best hours to call

09:00 in Semnan
Inside working hours on both sides
14:00 in Shanghai
10:00 in Semnan
Inside working hours on both sides
15:00 in Shanghai
11:00 in Semnan
Inside working hours on both sides
16:00 in Shanghai
12:00 in Semnan
Inside working hours on both sides
17:00 in Shanghai

Where daylight saving pulls them apart

Neither Semnan nor Shanghai changes its clocks, so the gap above holds all year.

Also useful

Common questions

How many hours ahead is Shanghai of Semnan?

Shanghai is 4½ hours ahead of Semnan right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Semnan and Shanghai?

Any hour in 09:00–13:00 Semnan time is inside working hours in both cities.

Do Semnan and Shanghai change clocks on the same date?

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