Rio de Janeiro to Boise, ID: time difference
Boise, ID is 3 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 07:43 7:43 AM Boise, ID 04:43 4:43 AM You –:–
07:43 7:43 AM
Brasilia Standard Time · UTC-3
☀️ 05:26 · 🌙 17:55
04:43 4:43 AM
Mountain Daylight Time · UTC-6
☀️ 07:53 · 🌙 19:11
·
−3 h
Boise, ID is 3 h behind Rio de Janeiro.
When you, Rio de Janeiro and Boise, ID 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
🇺🇸 Boise, ID
21 9 PM 22 10 PM 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
📍 Your time
- Asleep
- Early
- Working hours
- Evening
- Both working
- Right now
Time zones side by side
| Detail | 🇧🇷 Rio de Janeiro | 🇺🇸 Boise, ID |
|---|---|---|
| Local time | 07:43 | 04:43 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Brasilia Standard Time | Mountain Daylight Time |
| UTC offset | UTC-3 | UTC-6 |
| Offset from Rio de Janeiro | — | −3 h |
| IANA zone | America/Sao Paulo | America/Boise |
| Daylight saving | Not observed | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 05:26 | 07:53 |
| Sunset | 17:55 | 19:11 |
| Daylight | 12 h 30 min | 11 h 18 min |
| People on this clock | 6,211,223 | 235,684 |
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 Boise, ID: common questions
What is the time difference between Rio de Janeiro and Boise, ID?
Boise is 3 hours behind: it uses UTC−6, while Rio de Janeiro is on UTC−3.
What time is it in Boise, ID, when it is 9:00 AM in Rio de Janeiro?
When it is 9:00 AM in Rio de Janeiro, it is 6:00 AM in Boise.
If it is 6:00 PM in Rio de Janeiro, what time is it in Boise, ID?
At 6:00 PM in Rio de Janeiro, clocks in Boise show 3:00 PM.
Is there a time when both Rio de Janeiro and Boise, ID, are at work?
Yes: from 12:00 PM to 6:00 PM in Rio de Janeiro (9:00 AM to 3:00 PM in Boise), the working days (9:00 AM–6:00 PM) overlap.
When is it still the previous day in Boise, ID?
Until 3:00 AM in Rio de Janeiro it is still the previous day in Boise. The other way round, from 9:00 PM in Boise it is already the next day in Rio de Janeiro.
Is the time difference between Rio de Janeiro and Boise, ID, the same all year?
No. Only Boise switches to summer time, so the gap changes twice a year. From November 1, 2026, Boise will be 4 hours behind Rio de Janeiro.
