Offset
The time difference between Yokohama and Buenos Aires is 12 hours.
Yokohama (JST) is ahead of Buenos Aires (ART).
JST: UTC+9
ART: UTC-3
Neither Yokohama nor Buenos Aires is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Yokohama and Buenos Aires don't overlap on the same weekday. Buenos Aires is 12 hours behind Yokohama.
With some flexibility, there’s a workable window outside standard hours:
- 7 PM–8 PM in Yokohama (7 AM–8 AM in Buenos Aires) — suggest 7:00 PM Yokohama (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
Yokohama 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 Yokohama.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Yokohama | 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 Yokohama 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
- 6:56 PM
- Day length
- 14h 29m
- Sunrise
- 7:56 AM
- Sunset
- 5:51 PM
- Day length
- 9h 55m
Daylight overlap: 1h 24m — 4:27 AM–5:51 AM in Yokohama (4:27 PM–5:51 PM in Buenos Aires). Both locations are in daylight during this window.
Cities in these zones
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 Yokohama in Buenos Aires?
- 9:00 am Yokohama is 9:00 pm Buenos Aires, the previous day.
- What is 12:00 pm Yokohama in Buenos Aires?
- 12:00 pm Yokohama is 12:00 am Buenos Aires.
- What is 12:30 pm Yokohama in Buenos Aires?
- 12:30 pm Yokohama is 12:30 am Buenos Aires.
- What is 2:00 pm Yokohama in Buenos Aires?
- 2:00 pm Yokohama is 2:00 am Buenos Aires.
- What is 5:00 pm Yokohama in Buenos Aires?
- 5:00 pm Yokohama is 5:00 am Buenos Aires.
- What is 11:30 pm Yokohama in Buenos Aires?
- 11:30 pm Yokohama is 11:30 am Buenos Aires.