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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 Buenos Aires vs Tondabayashichō

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

Buenos Aires and Tondabayashichō hour by hour, with the working-hour overlap shaded
City00:00 in Buenos Aires01:00 in Buenos Aires02:00 in Buenos Aires03:00 in Buenos Aires04:00 in Buenos Aires05:00 in Buenos Aires06:00 in Buenos Aires07:00 in Buenos Aires08:00 in Buenos Aires09:00 in Buenos Aires10:00 in Buenos Aires11:00 in Buenos Aires12:00 in Buenos Aires13:00 in Buenos Aires14:00 in Buenos Aires15:00 in Buenos Aires16:00 in Buenos Aires17:00 in Buenos Aires18:00 in Buenos Aires19:00 in Buenos Aires20:00 in Buenos Aires21:00 in Buenos Aires22:00 in Buenos Aires23:00 in Buenos Aires
Buenos Aires——000102030405060708091011121314151617181920212223
Tondabayashichō——000102030405060708091011121314151617181920212223
  • Working hours
  • Shoulder
  • Night
  • Overlap

Do more with Buenos Aires and Tondabayashichō

Open in the PlannerAdd more cities, find a meeting time that works for everyone, then share it as a link.Open in Watch ViewKeep Buenos Aires, Tondabayashichō 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 Tondabayashichō — the nearest workable window is 05:00–06:00 your time (17:00 there).

Where daylight saving pulls them apart

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

Also useful

Common questions

How many hours ahead is Tondabayashichō of Buenos Aires?

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

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

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 Buenos Aires and Tondabayashichō change clocks on the same date?

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