Buenos Aires – Tokyo: the working hours you share
Tokyo is 12 hours ahead of Buenos Aires. On a 09:00–18:00 working day their hours never touch — someone has to move.
- Difference+12 h
- Shared working hoursnone
The two days, side by side
Each row is one city's day in its own clock, from Buenos Aires's midnight. The marked band is the working hour both of them are inside.
shared working hour at work awake asleep
Best times to meet
One-hour windows, ranked by how well they fit both working days.
| Buenos Aires | Tokyo | Window |
|---|---|---|
| 09:00 at work | 21:00 late | late |
| 21:00 late | 09:00 next day at work | late |
| 07:00 early | 19:00 late | early |
Through the year: what daylight saving does
The difference between Buenos Aires and Tokyo is 12 hours on every day of the next twelve months — neither side's clock change moves it.
If you barely overlap
There is under an hour inside both working days, so a recurring call always costs one side. Alternate it instead of letting the same person pay every week:
| Week | Buenos Aires | Tokyo | |
|---|---|---|---|
| Week 1 | 09:00 at work | 21:00 late | Buenos Aires keeps working hours |
| Week 2 | 21:00 late | 09:00 next day at work | Tokyo keeps working hours |
The board opens with both cities already added. Change either side's working hours and the answer follows.
Open this on the boardNearby pairs
How this page is calculated
Offsets and daylight-saving rules come from the IANA time zone database through the standard Intl API — the same source the board uses, so nothing here is a hand-written offset table. Working hours are 09:00–18:00 local on both sides unless you change them on the board. City names and coordinates: GeoNames (CC BY 4.0).
Computed on August 28, 2026 · America/Argentina/Buenos_Aires · Asia/Tokyo · About