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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 Guangzhou vs Porto Velho

Guangzhou keeps CST (UTC+8) and Porto Velho keeps UTC−4 (UTC−4) today. Porto Velho is 12 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 Porto Velho — the nearest workable window is 05:00–06:00 your time (17:00 there).

Guangzhou and Porto Velho 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
Porto Velho——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Guangzhou and Porto Velho

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, Porto Velho 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 Porto Velho — the nearest workable window is 05:00–06:00 your time (17:00 there).

Where daylight saving pulls them apart

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

Also useful

Common questions

How many hours ahead is Porto Velho of Guangzhou?

Porto Velho is 12 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 Porto Velho?

There is no hour inside working hours in both cities. 05:00–06:00 your time (17:00 there) is the cheapest compromise, and one side is taking a shoulder hour.

Do Guangzhou and Porto Velho change clocks on the same date?

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