Offset
The time difference between Tokyo and Buenos Aires is 12 hours.
Tokyo (JST) is ahead of Buenos Aires (ART).
JST: UTC+9
ART: UTC-3
Neither Tokyo nor Buenos Aires is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Tokyo and Buenos Aires don't overlap on the same weekday. Buenos Aires is 12 hours behind Tokyo.
With some flexibility, there’s a workable window outside standard hours:
- 7 PM–8 PM in Tokyo (7 AM–8 AM in Buenos Aires) — suggest 7:00 PM Tokyo (7:00 AM Buenos Aires).
This means an early start or late finish for one side, but it’s a reasonable slot for a one-off meeting.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Japan
- New Year's DayThu, Jan 1
- Coming of Age DayMon, Jan 12
- Foundation DayWed, Feb 11
- The Emperor's BirthdayMon, Feb 23
- Vernal Equinox DayFri, Mar 20
- Shōwa DayWed, Apr 29
- Constitution Memorial DayWed, May 6
- Greenery DayMon, May 4
- Children's DayTue, May 5
- Marine DayMon, Jul 20
- Mountain DayTue, Aug 11
- Respect for the Aged DayMon, Sep 21
- Autumnal Equinox DayWed, Sep 23
- Sports DayMon, Oct 12
- Culture DayTue, Nov 3
- Labour Thanksgiving DayMon, Nov 23
Argentina
- New Year's DayThu, Jan 1
- CarnivalMon, Feb 16
- CarnivalTue, Feb 17
- Day of Remembrance for Truth and JusticeTue, Mar 24
- Day of the Veterans and Fallen of the Malvinas WarThu, Apr 2
- Good FridayFri, Apr 3
- Labour DayFri, May 1
- May RevolutionMon, May 25
- Anniversary of the Passing of General Martín Miguel de GüemesMon, Jun 15
- General Manuel Belgrano Memorial DaySat, Jun 20
- Independence DayThu, Jul 9
- General José de San Martín Memorial DayMon, Aug 17
- Day of Respect for Cultural DiversityMon, Oct 12
- National Sovereignty DayMon, Nov 23
- Immaculate Conception DayTue, Dec 8
- Christmas DayFri, Dec 25
About these zones
Tokyo uses Japan Standard Time (JST). To call Japan, dial +81.
Buenos Aires uses Argentina Time (ART). To call Argentina, dial +54.
Buenos Aires is approximately 11,400 miles east of Tokyo.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Tokyo | Buenos Aires | Day |
|---|---|---|
| 12:00 am | 12:00 pm | -1 day |
| 1:00 am | 1:00 pm | -1 day |
| 2:00 am | 2:00 pm | -1 day |
| 3:00 am | 3:00 pm | -1 day |
| 4:00 am | 4:00 pm | -1 day |
| 5:00 am | 5:00 pm | -1 day |
| 6:00 am | 6:00 pm | -1 day |
| 7:00 am | 7:00 pm | -1 day |
| 8:00 am | 8:00 pm | -1 day |
| 9:00 am | 9:00 pm | -1 day |
| 10:00 am | 10:00 pm | -1 day |
| 11:00 am | 11:00 pm | -1 day |
| 12:00 pm | 12:00 am | Same day |
| 1:00 pm | 1:00 am | Same day |
| 2:00 pm | 2:00 am | Same day |
| 3:00 pm | 3:00 am | Same day |
| 4:00 pm | 4:00 am | Same day |
| 5:00 pm | 5:00 am | Same day |
| 6:00 pm | 6:00 am | Same day |
| 7:00 pm | 7:00 am | Same day |
| 8:00 pm | 8:00 am | Same day |
| 9:00 pm | 9:00 am | Same day |
| 10:00 pm | 10:00 am | Same day |
| 11:00 pm | 11:00 am | Same day |
Daylight saving time
Neither Tokyo nor Buenos Aires observes daylight saving time. The offset between these zones remains constant year-round.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 4:27 AM
- Sunset
- 6:54 PM
- Day length
- 14h 28m
- Sunrise
- 7:55 AM
- Sunset
- 5:51 PM
- Day length
- 9h 56m
Cities in these zones
Other cities in Japan Standard Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Japan Standard Time
- HND
- NRT
- ITM
- KIX
- UKB
- NGO
- NKM
- CTS
- OKD
- FUK
Airports in Argentina Time
- AEP
- EZE
Related conversions
Common conversions
- What is 9:00 am Tokyo in Buenos Aires?
- 9:00 am Tokyo is 9:00 pm Buenos Aires, the previous day.
- What is 12:00 pm Tokyo in Buenos Aires?
- 12:00 pm Tokyo is 12:00 am Buenos Aires.
- What is 12:30 pm Tokyo in Buenos Aires?
- 12:30 pm Tokyo is 12:30 am Buenos Aires.
- What is 2:00 pm Tokyo in Buenos Aires?
- 2:00 pm Tokyo is 2:00 am Buenos Aires.
- What is 5:00 pm Tokyo in Buenos Aires?
- 5:00 pm Tokyo is 5:00 am Buenos Aires.
- What is 11:30 pm Tokyo in Buenos Aires?
- 11:30 pm Tokyo is 11:30 am Buenos Aires.