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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 Guangzhou vs Serra

Guangzhou keeps CST (UTC+8) and Serra keeps UTC−3 (UTC−3) today. Serra is 11 hours behind Guangzhou; 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 Serra — the nearest workable window is 17:00–18:00 your time (06:00 there).

Guangzhou and Serra hour by hour, with the working-hour overlap shaded
City00:00 in Guangzhou01:00 in Guangzhou02:00 in Guangzhou03:00 in Guangzhou04:00 in Guangzhou05:00 in Guangzhou06:00 in Guangzhou07:00 in Guangzhou08:00 in Guangzhou09:00 in Guangzhou10:00 in Guangzhou11:00 in Guangzhou12:00 in Guangzhou13:00 in Guangzhou14:00 in Guangzhou15:00 in Guangzhou16:00 in Guangzhou17:00 in Guangzhou18:00 in Guangzhou19:00 in Guangzhou20:00 in Guangzhou21:00 in Guangzhou22:00 in Guangzhou23:00 in Guangzhou
Guangzhou——000102030405060708091011121314151617181920212223
Serra——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Guangzhou and Serra

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Guangzhou, Serra 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 Serra — the nearest workable window is 17:00–18:00 your time (06:00 there).

Where daylight saving pulls them apart

Neither Guangzhou nor Serra changes its clocks, so the gap above holds all year.

Also useful

Common questions

How many hours ahead is Serra of Guangzhou?

Serra is 11 hours behind Guangzhou right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between Guangzhou and Serra?

There is no hour inside working hours in both cities. 17:00–18:00 your time (06:00 there) is the cheapest compromise, and one side is taking a shoulder hour.

Do Guangzhou and Serra change clocks on the same date?

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