Buenos Aires to San Juan: time difference
San Juan is 1 h behind Buenos Aires. Live clocks for both, the working hours they share, and how each one sits against your own time.
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Buenos Aires 02:47 2:47 AM San Juan 01:47 1:47 AM You –:–
02:47 2:47 AM
Argentina Standard Time · UTC-3
☀️ 06:19 · 🌙 19:04
01:47 1:47 AM
Atlantic Standard Time · UTC-4
☀️ 06:18 · 🌙 18:07
·
−1 h
San Juan is 1 h behind Buenos Aires.
When you, Buenos Aires and San Juan are all at the desk
Pick the working hours below – the window every location shares appears once your time zone is known.
Working hours
🇦🇷 Buenos Aires
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
🇵🇷 San Juan
23 11 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇦🇷 Buenos Aires | 🇵🇷 San Juan |
|---|---|---|
| Local time | 02:47 | 01:47 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Argentina Standard Time | Atlantic Standard Time |
| UTC offset | UTC-3 | UTC-4 |
| Offset from Buenos Aires | — | −1 h |
| IANA zone | America/Argentina/Buenos Aires | America/Puerto Rico |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:19 | 06:18 |
| Sunset | 19:04 | 18:07 |
| Daylight | 12 h 45 min | 11 h 49 min |
| People on this clock | 2,891,082 | 322,854 |
Compare Buenos Aires with another city
More comparisons with Buenos Aires: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Buenos Aires and San Juan: common questions
What is the time difference between Buenos Aires and San Juan?
San Juan is 1 hour behind: it uses UTC−4, while Buenos Aires is on UTC−3.
If it is 9:00 AM in Buenos Aires, what time is it in San Juan?
At 9:00 AM in Buenos Aires, clocks in San Juan show 8:00 AM.
What time is it in San Juan when it is 6:00 PM in Buenos Aires?
When it is 6:00 PM in Buenos Aires, it is 5:00 PM in San Juan.
Is there a time when both Buenos Aires and San Juan are at work?
Yes: from 10:00 AM to 6:00 PM in Buenos Aires (9:00 AM to 5:00 PM in San Juan), the working days (9:00 AM–6:00 PM) overlap.
When is it still the previous day in San Juan?
Until 1:00 AM in Buenos Aires it is still the previous day in San Juan. The other way round, from 11:00 PM in San Juan it is already the next day in Buenos Aires.
Does the time gap between Buenos Aires and San Juan change during the year?
No, the clocks change neither in Buenos Aires nor in San Juan, so the gap is 1 hour all year round.
