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Global ClockTime zone converter & meeting planner
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SETTINGS
Clock
Working hours
Start
09
End
18
Theme

AUTO follows the operating system. Working hours drive the green banding on every grid. All four persist on this device only.

Time in Santa Rosa vs Guangzhou

Santa Rosa keeps PDT (UTC−7) and Guangzhou keeps CST (UTC+8) today. Guangzhou is 15 hours ahead of Santa Rosa; the rows below read both clocks live.

The working day, side by side

The working days do not meet. there is no working-hour overlap with Guangzhou — the nearest workable window is 17:00–18:00 your time (08:00 there).

Santa Rosa and Guangzhou hour by hour, with the working-hour overlap shaded
City00:00 in Santa Rosa01:00 in Santa Rosa02:00 in Santa Rosa03:00 in Santa Rosa04:00 in Santa Rosa05:00 in Santa Rosa06:00 in Santa Rosa07:00 in Santa Rosa08:00 in Santa Rosa09:00 in Santa Rosa10:00 in Santa Rosa11:00 in Santa Rosa12:00 in Santa Rosa13:00 in Santa Rosa14:00 in Santa Rosa15:00 in Santa Rosa16:00 in Santa Rosa17:00 in Santa Rosa18:00 in Santa Rosa19:00 in Santa Rosa20:00 in Santa Rosa21:00 in Santa Rosa22:00 in Santa Rosa23:00 in Santa Rosa
Santa Rosa——000102030405060708091011121314151617181920212223
Guangzhou——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Santa Rosa and Guangzhou

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

Best hours to call

there is no working-hour overlap with Guangzhou — the nearest workable window is 17:00–18:00 your time (08:00 there).

Where daylight saving pulls them apart

Santa Rosa next changes on Sunday 1 November 2026. Between those two dates the gap between the cities is an hour different from the one shown above — which is exactly when a recurring meeting drifts. Every date we track is on the daylight saving page.

Also useful

Common questions

How many hours ahead is Guangzhou of Santa Rosa?

Guangzhou is 15 hours ahead of Santa Rosa right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Santa Rosa and Guangzhou?

There is no hour inside working hours in both cities. 17:00–18:00 your time (08:00 there) is the cheapest compromise, and one side is taking a shoulder hour.

Do Santa Rosa and Guangzhou change clocks on the same date?

Only one of them does, so the gap between them changes twice a year even though neither city moved relative to the sun.