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Global ClockTime zone converter & meeting planner
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09
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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 San José vs Buenos Aires

San José keeps CST (UTC−6) and Buenos Aires keeps UTC−3 (UTC−3) today. Buenos Aires is 3 hours ahead of San José; 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: 12:00–18:00 in Buenos Aires (09:00–15:00 your time).

San José and Buenos Aires hour by hour, with the working-hour overlap shaded
City00:00 in San José01:00 in San José02:00 in San José03:00 in San José04:00 in San José05:00 in San José06:00 in San José07:00 in San José08:00 in San José09:00 in San José10:00 in San José11:00 in San José12:00 in San José13:00 in San José14:00 in San José15:00 in San José16:00 in San José17:00 in San José18:00 in San José19:00 in San José20:00 in San José21:00 in San José22:00 in San José23:00 in San José
San José——000102030405060708091011121314151617181920212223
Buenos Aires——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with San José and Buenos Aires

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

Best hours to call

09:00 in San José
Inside working hours on both sides
12:00 in Buenos Aires
10:00 in San José
Inside working hours on both sides
13:00 in Buenos Aires
11:00 in San José
Inside working hours on both sides
14:00 in Buenos Aires
12:00 in San José
Inside working hours on both sides
15:00 in Buenos Aires

Where daylight saving pulls them apart

Neither San José nor Buenos Aires changes its clocks, so the gap above holds all year.

Also useful

Common questions

How many hours ahead is Buenos Aires of San José?

Buenos Aires is 3 hours ahead of San José right now. The gap is not fixed: it moves whenever either side changes its clocks.

What is the best time to call between San José and Buenos Aires?

Any hour in 09:00–15:00 San José time is inside working hours in both cities.

Do San José and Buenos Aires change clocks on the same date?

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