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