Skip to content
Global ClockTime zone converter & meeting planner
PAGES
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 Piraeus

Guangzhou keeps CST (UTC+8) and Piraeus keeps EEST (UTC+3) today. Piraeus is 5 hours behind Guangzhou; 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: 09:00–13:00 in Piraeus (14:00–18:00 your time).

Guangzhou and Piraeus 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
Piraeus——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Guangzhou and Piraeus

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, Piraeus and other cities on screen as live clocks, under an animated sky and sun.

Best hours to call

14:00 in Guangzhou
Inside working hours on both sides
09:00 in Piraeus
15:00 in Guangzhou
Inside working hours on both sides
10:00 in Piraeus
16:00 in Guangzhou
Inside working hours on both sides
11:00 in Piraeus
17:00 in Guangzhou
Inside working hours on both sides
12:00 in Piraeus

Where daylight saving pulls them apart

Piraeus next changes on Sunday 25 October 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 Piraeus of Guangzhou?

Piraeus is 5 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 Piraeus?

Any hour in 14:00–18:00 Guangzhou time is inside working hours in both cities.

Do Guangzhou and Piraeus 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.