Offset
The time difference between San José and Buenos Aires is 3 hours.
San José (CST) is behind Buenos Aires (ART).
CST: UTC-6
ART: UTC-3
Neither San José nor Buenos Aires is currently observing daylight saving time.
When to schedule
Business-hours overlap: 9 AM–2 PM in San José (12 PM–5 PM in Buenos Aires).
Both teams are in working hours during this window on weekdays.
Suggested time: 11:00 AM San José (2:00 PM Buenos Aires).
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.
Costa Rica
- New Year's DayThu, Jan 1
- Maundy ThursdayThu, Apr 2
- Good FridayFri, Apr 3
- Juan Santamaría DaySat, Apr 11
- Labour DayFri, May 1
- Annexation of the Party of Nicoya to Costa RicaSat, Jul 25
- Feast of Our Lady of the AngelsSun, Aug 2
- Mother's DaySat, Aug 15
- Independence DayTue, Sep 15
- Army Abolition DayTue, Dec 1
- Christmas DayFri, Dec 25
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
San José uses Central Standard Time. To call Costa Rica, dial +506.
Buenos Aires uses Argentina Time (ART). To call Argentina, dial +54.
Buenos Aires is approximately 3,500 miles southeast of San José.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| San José | Buenos Aires | Day |
|---|---|---|
| 12:00 am | 3:00 am | Same day |
| 1:00 am | 4:00 am | Same day |
| 2:00 am | 5:00 am | Same day |
| 3:00 am | 6:00 am | Same day |
| 4:00 am | 7:00 am | Same day |
| 5:00 am | 8:00 am | Same day |
| 6:00 am | 9:00 am | Same day |
| 7:00 am | 10:00 am | Same day |
| 8:00 am | 11:00 am | Same day |
| 9:00 am | 12:00 pm | Same day |
| 10:00 am | 1:00 pm | Same day |
| 11:00 am | 2:00 pm | Same day |
| 12:00 pm | 3:00 pm | Same day |
| 1:00 pm | 4:00 pm | Same day |
| 2:00 pm | 5:00 pm | Same day |
| 3:00 pm | 6:00 pm | Same day |
| 4:00 pm | 7:00 pm | Same day |
| 5:00 pm | 8:00 pm | Same day |
| 6:00 pm | 9:00 pm | Same day |
| 7:00 pm | 10:00 pm | Same day |
| 8:00 pm | 11:00 pm | Same day |
| 9:00 pm | 12:00 am | +1 day |
| 10:00 pm | 1:00 am | +1 day |
| 11:00 pm | 2:00 am | +1 day |
Daylight saving time
Neither San José 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
- 5:16 AM
- Sunset
- 5:57 PM
- Day length
- 12h 41m
- Sunrise
- 7:56 AM
- Sunset
- 5:51 PM
- Day length
- 9h 55m
Daylight overlap: 9h 35m — 5:16 AM–2:51 PM in San José (8:16 AM–5:51 PM in Buenos Aires). Both locations are in daylight during this window.
Airports in these zones
Airports in Central Standard Time
- SJO
- SYQ
Airports in Argentina Time
- AEP
- EZE
Related conversions
Common conversions
- What is 9:00 am San José in Buenos Aires?
- 9:00 am San José is 12:00 pm Buenos Aires.
- What is 12:00 pm San José in Buenos Aires?
- 12:00 pm San José is 3:00 pm Buenos Aires.
- What is 12:30 pm San José in Buenos Aires?
- 12:30 pm San José is 3:30 pm Buenos Aires.
- What is 2:00 pm San José in Buenos Aires?
- 2:00 pm San José is 5:00 pm Buenos Aires.
- What is 5:00 pm San José in Buenos Aires?
- 5:00 pm San José is 8:00 pm Buenos Aires.
- What is 11:30 pm San José in Buenos Aires?
- 11:30 pm San José is 2:30 am Buenos Aires, the next day.