San Juan to Rio de Janeiro: time difference
Rio de Janeiro 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 01:57 1:57 AM Rio de Janeiro 02:57 2:57 AM You –:–
01:57 1:57 AM
Atlantic Standard Time · UTC-4
☀️ 06:18 · 🌙 18:07
02:57 2:57 AM
Brasilia Standard Time · UTC-3
☀️ 05:26 · 🌙 17:55
·
+1 h
Rio de Janeiro is 1 h ahead of San Juan.
When you, San Juan and Rio de Janeiro 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
🇧🇷 Rio de Janeiro
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 | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 01:57 | 02:57 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Atlantic Standard Time | Brasilia Standard Time |
| UTC offset | UTC-4 | UTC-3 |
| Offset from San Juan | — | +1 h |
| IANA zone | America/Puerto Rico | America/Sao Paulo |
| Daylight saving | Not observed | Not observed |
| Sunrise | 06:18 | 05:26 |
| Sunset | 18:07 | 17:55 |
| Daylight | 11 h 49 min | 12 h 30 min |
| People on this clock | 322,854 | 6,211,223 |
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 Rio de Janeiro: common questions
What is the time difference between San Juan and Rio de Janeiro?
Rio de Janeiro 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 Rio de Janeiro?
At 9:00 AM in San Juan, clocks in Rio de Janeiro show 10:00 AM.
What time is it in Rio de Janeiro when it is 6:00 PM in San Juan?
When it is 6:00 PM in San Juan, it is 7:00 PM in Rio de Janeiro.
When do working hours in San Juan and in Rio de Janeiro 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 Rio de Janeiro.
When does the date change in Rio de Janeiro compared with San Juan?
The new day starts in Rio de Janeiro earlier: at 11:00 PM in San Juan it is already midnight there. Until 1:00 AM in Rio de Janeiro, San Juan is still on the previous day.
Is the time difference between San Juan and Rio de Janeiro the same all year?
Yes. Neither San Juan nor Rio de Janeiro switches to summer time, so the gap is always 1 hour.
