San Isidro to Buenos Aires: time difference
Buenos Aires is 3 h ahead of San Isidro. Live clocks for both, the working hours they share, and how each one sits against your own time.
+3 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
San Isidro 05:35 5:35 AM Buenos Aires 08:35 8:35 AM You –:–
05:35 5:35 AM
Central Standard Time · UTC-6
☀️ 05:25 · 🌙 17:18
08:35 8:35 AM
Argentina Standard Time · UTC-3
☀️ 06:07 · 🌙 19:11
·
+3 h
Buenos Aires is 3 h ahead of San Isidro.
When you, San Isidro and Buenos Aires are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇨🇷 San Isidro
0 12 AM 1 1 AM 2 2 AM 3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM
🇦🇷 Buenos Aires
3 3 AM 4 4 AM 5 5 AM 6 6 AM 7 7 AM 8 8 AM 9 9 AM 10 10 AM 11 11 AM 12 12 PM 13 1 PM 14 2 PM 15 3 PM 16 4 PM 17 5 PM 18 6 PM 19 7 PM 20 8 PM 21 9 PM 22 10 PM 23 11 PM 0 12 AM 1 1 AM 2 2 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇨🇷 San Isidro | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 05:35 | 08:35 |
| Local date | Monday, October 19, 2026 | Monday, October 19, 2026 |
| Time zone | Central Standard Time | Argentina Standard Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from San Isidro | — | +3 h |
| IANA zone | America/Costa Rica | America/Argentina/Buenos Aires |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:25 | 06:07 |
| Sunset | 17:18 | 19:11 |
| Daylight | 11 h 53 min | 13 h 4 min |
| People on this clock | 17,000 | 2,891,082 |
Compare San Isidro with another city
More comparisons with San Isidro: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
San Isidro and Buenos Aires: common questions
What is the time difference between San Isidro and Buenos Aires?
Buenos Aires is 3 hours ahead: it uses UTC−3, while San Isidro is on UTC−6.
What time is it in Buenos Aires when it is 9:00 AM in San Isidro?
When it is 9:00 AM in San Isidro, it is 12:00 PM in Buenos Aires.
If it is 6:00 PM in San Isidro, what time is it in Buenos Aires?
At 6:00 PM in San Isidro, clocks in Buenos Aires show 9:00 PM.
Is there a time when both San Isidro and Buenos Aires are at work?
Yes: from 9:00 AM to 3:00 PM in San Isidro (12:00 PM to 6:00 PM in Buenos Aires), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Buenos Aires compared with San Isidro?
The new day starts in Buenos Aires earlier: at 9:00 PM in San Isidro it is already midnight there. Until 3:00 AM in Buenos Aires, San Isidro is still on the previous day.
Does the time gap between San Isidro and Buenos Aires change during the year?
No, the clocks change neither in San Isidro nor in Buenos Aires, so the gap is 3 hours all year round.
