Time in Semnan vs Guangzhou
Semnan keeps UTC+3:30 (UTC+3:30) and Guangzhou keeps CST (UTC+8) today. Guangzhou 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 Guangzhou (09:00–13:00 your time).
| City | 00:00 in Semnan | 01:00 in Semnan | 02:00 in Semnan | 03:00 in Semnan | 04:00 in Semnan | 05:00 in Semnan | 06:00 in Semnan | 07:00 in Semnan | 08:00 in Semnan | 09:00 in Semnan | 10:00 in Semnan | 11:00 in Semnan | 12:00 in Semnan | 13:00 in Semnan | 14:00 in Semnan | 15:00 in Semnan | 16:00 in Semnan | 17:00 in Semnan | 18:00 in Semnan | 19:00 in Semnan | 20:00 in Semnan | 21:00 in Semnan | 22:00 in Semnan | 23:00 in Semnan |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Semnan—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| Guangzhou—— | 00 | 01 | 02 | 03 | 04 | 05 | 06 | 07 | 08 | 09 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
- Working hours
- Shoulder
- Night
- Overlap
Do more with Semnan and Guangzhou
Best hours to call
09:00 in Semnan
Inside working hours on both sides
14:00 in Guangzhou
10:00 in Semnan
Inside working hours on both sides
15:00 in Guangzhou
11:00 in Semnan
Inside working hours on both sides
16:00 in Guangzhou
12:00 in Semnan
Inside working hours on both sides
17:00 in Guangzhou
Where daylight saving pulls them apart
Neither Semnan nor Guangzhou changes its clocks, so the gap above holds all year.
Also useful
Common questions
How many hours ahead is Guangzhou of Semnan?
Guangzhou 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 Guangzhou?
Any hour in 09:00–13:00 Semnan time is inside working hours in both cities.
Do Semnan and Guangzhou change clocks on the same date?
Neither city changes its clocks, so the gap between them never moves.