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Global ClockTime zone converter & meeting planner
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Working hours
Start
09
End
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 Shanghai vs San Juan

Shanghai keeps CST (UTC+8) and San Juan keeps PST (UTC+8) today. San Juan is the same time as Shanghai; 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 San Juan (09:00–18:00 your time).

Shanghai and San Juan hour by hour, with the working-hour overlap shaded
City00:00 in Shanghai01:00 in Shanghai02:00 in Shanghai03:00 in Shanghai04:00 in Shanghai05:00 in Shanghai06:00 in Shanghai07:00 in Shanghai08:00 in Shanghai09:00 in Shanghai10:00 in Shanghai11:00 in Shanghai12:00 in Shanghai13:00 in Shanghai14:00 in Shanghai15:00 in Shanghai16:00 in Shanghai17:00 in Shanghai18:00 in Shanghai19:00 in Shanghai20:00 in Shanghai21:00 in Shanghai22:00 in Shanghai23:00 in Shanghai
Shanghai——000102030405060708091011121314151617181920212223
San Juan——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Shanghai and San Juan

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

Best hours to call

09:00 in Shanghai
Inside working hours on both sides
09:00 in San Juan
10:00 in Shanghai
Inside working hours on both sides
10:00 in San Juan
11:00 in Shanghai
Inside working hours on both sides
11:00 in San Juan
12:00 in Shanghai
Inside working hours on both sides
12:00 in San Juan

Where daylight saving pulls them apart

Neither Shanghai nor San Juan changes its clocks, so the gap above holds all year.

Also useful

Common questions

How many hours ahead is San Juan of Shanghai?

San Juan and Shanghai read the same clock right now.

What is the best time to call between Shanghai and San Juan?

Any hour in 09:00–18:00 Shanghai time is inside working hours in both cities.

Do Shanghai and San Juan change clocks on the same date?

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