Time Difference Between Japan and Argentina
As of 31 August 2026, Argentina is 12 hours behind Japan. This difference is fixed: neither zone shifts its clocks against the other, so it holds all year.
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Tokyo, Japan
07:34
Tue, Sep 1, 2026
UTC+9 · Asia/Tokyo
Buenos Aires, Argentina
-12h19:34
Mon, Aug 31, 2026
UTC-3 · America/Argentina/Buenos_Aires
Argentina is 12 hours behind Japan.
When it is 07:34 in Japan, it is already the previous day in Argentina.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Japan | Tuesday, September 1, 2026 | Asia/Tokyo | UTC+9 | Not observed |
| Argentina | Monday, August 31, 2026 | America/Argentina/Buenos_Aires | UTC-3 | Not observed |
Hour by hour: Japan to Argentina
Every hour of today in Japan and what it is in Argentina. Highlighted rows fall inside Argentina working hours (09:00–18:00).
| Japan | Argentina |
|---|---|
| 00:00 | 12:00prev day |
| 01:00 | 13:00prev day |
| 02:00 | 14:00prev day |
| 03:00 | 15:00prev day |
| 04:00 | 16:00prev day |
| 05:00 | 17:00prev day |
| 06:00 | 18:00prev day |
| 07:00 | 19:00prev day |
| 08:00 | 20:00prev day |
| 09:00 | 21:00prev day |
| 10:00 | 22:00prev day |
| 11:00 | 23:00prev day |
| Japan | Argentina |
|---|---|
| 12:00 | 00:00 |
| 13:00 | 01:00 |
| 14:00 | 02:00 |
| 15:00 | 03:00 |
| 16:00 | 04:00 |
| 17:00 | 05:00 |
| 18:00 | 06:00 |
| 19:00 | 07:00 |
| 20:00 | 08:00 |
| 21:00 | 09:00 |
| 22:00 | 10:00 |
| 23:00 | 11:00 |
Best time to call or meet
Overlapping working hours
No overlap
Standard working hours in Japan and Argentina never overlap. Someone has to start early or finish late — the calling window below is the practical compromise.
Reasonable calling hours
08:00–09:00 in Japan (20:00–21:00 in Argentina)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
Neither Japan nor Argentina changes its clocks, so the difference of 12 hours stays the same all year.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
Japan and Argentina: common questions
What is the time difference between Japan and Argentina?
Argentina is 12 hours behind Japan, and this does not change during the year because the difference between these two zones is fixed.
When it is 9:00 AM in Japan, what time is it in Argentina?
It is 09:00 PM in Buenos Aires, Argentina. Use the time field in the calculator above to check any other hour.
Is Argentina ahead of or behind Japan?
Argentina is behind Japan by 12 hours at the moment. In practical terms, the working day in Argentina starts and ends later in Japan terms.
Do Japan and Argentina observe daylight saving time?
Neither Japan nor Argentina observes daylight saving time, so the difference stays at 12 hours all year.
What is the best time to call Argentina from Japan?
Standard working hours in Japan and Argentina do not overlap at all, so one side has to take the call outside office hours. Early morning in Japan or late evening is usually the least disruptive option.
Related comparisons
Local dates shown for Tokyo, Japan (UTC+9) and Buenos Aires, Argentina (UTC-3) were generated on Monday, August 31, 2026 UTC and refresh in your browser.