Rio de Janeiro to San Juan: time difference
San Juan is 1 h behind Rio de Janeiro. 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.
Rio de Janeiro 03:48 3:48 AM San Juan 02:48 2:48 AM You –:–
03:48 3:48 AM
Brasilia Standard Time · UTC-3
☀️ 05:26 · 🌙 17:55
02:48 2:48 AM
Atlantic Standard Time · UTC-4
☀️ 06:18 · 🌙 18:07
·
−1 h
San Juan is 1 h behind Rio de Janeiro.
When you, Rio de Janeiro 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
🇧🇷 Rio de Janeiro
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 | 🇧🇷 Rio de Janeiro | 🇵🇷 San Juan |
|---|---|---|
| Local time | 03:48 | 02:48 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Brasilia Standard Time | Atlantic Standard Time |
| UTC offset | UTC-3 | UTC-4 |
| Offset from Rio de Janeiro | — | −1 h |
| IANA zone | America/Sao Paulo | America/Puerto Rico |
| Daylight saving | Not observed | Not observed |
| Sunrise | 05:26 | 06:18 |
| Sunset | 17:55 | 18:07 |
| Daylight | 12 h 30 min | 11 h 49 min |
| People on this clock | 6,211,223 | 322,854 |
Compare Rio de Janeiro with another city
More comparisons with Rio de Janeiro: the time zones next to it and the far side of the clock.
Nearby time zones
Big time differences
Rio de Janeiro and San Juan: common questions
How many hours behind Rio de Janeiro is San Juan?
The clocks in San Juan are 1 hour behind those in Rio de Janeiro (UTC−4 and UTC−3).
What time is it in San Juan at the start of the working day in Rio de Janeiro?
The working day in Rio de Janeiro starts at 9:00 AM; in San Juan it is 8:00 AM at that moment.
If it is 6:00 PM in Rio de Janeiro, what time is it in San Juan?
At 6:00 PM in Rio de Janeiro, clocks in San Juan show 5:00 PM.
When is a good time to call San Juan from Rio de Janeiro?
Between 10:00 AM and 6:00 PM in Rio de Janeiro – that is 9:00 AM to 5:00 PM in San Juan – both places are within working hours (9:00 AM–6:00 PM).
When is it still the previous day in San Juan?
Until 1:00 AM in Rio de Janeiro 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 Rio de Janeiro.
Does the time difference between Rio de Janeiro and San Juan change?
No. Neither place uses daylight saving time, so the difference stays 1 hour all year.
