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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 Hiroshima vs Buenos Aires

Hiroshima keeps JST (UTC+9) and Buenos Aires keeps UTC−3 (UTC−3) today. Buenos Aires is 12 hours behind Hiroshima; 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 Buenos Aires — the nearest workable window is 05:00–06:00 your time (17:00 there).

Hiroshima and Buenos Aires hour by hour, with the working-hour overlap shaded
City00:00 in Hiroshima01:00 in Hiroshima02:00 in Hiroshima03:00 in Hiroshima04:00 in Hiroshima05:00 in Hiroshima06:00 in Hiroshima07:00 in Hiroshima08:00 in Hiroshima09:00 in Hiroshima10:00 in Hiroshima11:00 in Hiroshima12:00 in Hiroshima13:00 in Hiroshima14:00 in Hiroshima15:00 in Hiroshima16:00 in Hiroshima17:00 in Hiroshima18:00 in Hiroshima19:00 in Hiroshima20:00 in Hiroshima21:00 in Hiroshima22:00 in Hiroshima23:00 in Hiroshima
Hiroshima——000102030405060708091011121314151617181920212223
Buenos Aires——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Hiroshima 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 Hiroshima, Buenos Aires 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 Buenos Aires — the nearest workable window is 05:00–06:00 your time (17:00 there).

Where daylight saving pulls them apart

Neither Hiroshima 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 Hiroshima?

Buenos Aires is 12 hours behind Hiroshima right now. The gap is not fixed: it moves whenever either side changes its clocks.

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

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 Hiroshima and Buenos Aires change clocks on the same date?

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