San Juan to Buenos Aires: time difference
Buenos Aires is 1 h ahead of San Juan. Live clocks for both, the working hours they share, and how each one sits against your own time.
+1 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
San Juan 03:58 3:58 AM Buenos Aires 04:58 4:58 AM You –:–
03:58 3:58 AM
Atlantic Standard Time · UTC-4
☀️ 05:55 · 🌙 17:48
04:58 4:58 AM
Argentina Standard Time · UTC-3
☀️ 06:09 · 🌙 19:11
·
+1 h
Buenos Aires is 1 h ahead of San Juan.
When you, San Juan 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 Juan
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
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 0 12 AM
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇹🇹 San Juan | 🇦🇷 Buenos Aires |
|---|---|---|
| Local time | 03:58 | 04:58 |
| Local date | Sunday, October 18, 2026 | Sunday, October 18, 2026 |
| Time zone | Atlantic Standard Time | Argentina Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from San Juan | — | +1 h |
| IANA zone | America/Port of Spain | America/Argentina/Buenos Aires |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:55 | 06:09 |
| Sunset | 17:48 | 19:11 |
| Daylight | 11 h 52 min | 13 h 2 min |
| People on this clock | — | 2,891,082 |
Compare San Juan with another city
More comparisons with San Juan: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
San Juan and Buenos Aires: common questions
What is the time difference between San Juan and Buenos Aires?
Buenos Aires is 1 hour ahead: it uses UTC−3, while San Juan is on UTC−4.
If it is 9:00 AM in San Juan, what time is it in Buenos Aires?
At 9:00 AM in San Juan, clocks in Buenos Aires show 10:00 AM.
What time is it in Buenos Aires when it is 6:00 PM in San Juan?
When it is 6:00 PM in San Juan, it is 7:00 PM in Buenos Aires.
When do working hours in San Juan and in Buenos Aires overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 5:00 PM in San Juan, which is 10:00 AM to 6:00 PM in Buenos Aires.
From what time in San Juan is it tomorrow in Buenos Aires?
Once it is 11:00 PM in San Juan, the date in Buenos Aires has already changed. Until 1:00 AM in Buenos Aires, it is still the previous day in San Juan.
Is the time difference between San Juan and Buenos Aires the same all year?
Yes. Neither San Juan nor Buenos Aires switches to summer time, so the gap is always 1 hour.
