Boise, ID to Rio de Janeiro: time difference
Rio de Janeiro is 3 h ahead of Boise, ID. Live clocks for both, the working hours they share, and how each one sits against your own time.
+3 h
Your time
One day, 2 clocks
Drag along the band to read any hour in every place at once.
Boise, ID 00:46 12:46 AM Rio de Janeiro 03:46 3:46 AM You –:–
00:46 12:46 AM
Mountain Daylight Time · UTC-6
☀️ 07:52 · 🌙 19:13
03:46 3:46 AM
Brasilia Standard Time · UTC-3
☀️ 05:26 · 🌙 17:55
·
+3 h
Rio de Janeiro is 3 h ahead of Boise, ID.
When you, Boise, ID 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
🇺🇸 Boise, ID
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
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 1 1 AM 2 2 AM
📍 Your time
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Time zones side by side
| Detail | 🇺🇸 Boise, ID | 🇧🇷 Rio de Janeiro |
|---|---|---|
| Local time | 00:46 | 03:46 |
| Local date | Saturday, October 10, 2026 | Saturday, October 10, 2026 |
| Time zone | Mountain Daylight Time | Brasilia Standard Time |
| UTC offset | UTC-6 | UTC-3 |
| Offset from Boise, ID | — | +3 h |
| IANA zone | America/Boise | America/Sao Paulo |
| Daylight saving | On summer time → UTC-7, Nov 1, 01:00 | Not observed |
| Sunrise | 07:52 | 05:26 |
| Sunset | 19:13 | 17:55 |
| Daylight | 11 h 21 min | 12 h 30 min |
| People on this clock | 235,684 | 6,211,223 |
Compare Boise, ID with another city
More comparisons with Boise, ID: the time zones next to it and the far side of the clock.
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Big time differences
Boise, ID and Rio de Janeiro: common questions
How far ahead of Boise, ID, is Rio de Janeiro?
Rio de Janeiro is 3 hours ahead of Boise: UTC−3 against UTC−6.
What time is it in Rio de Janeiro when it is 9:00 AM in Boise, ID?
When it is 9:00 AM in Boise, it is 12:00 PM in Rio de Janeiro.
If it is 6:00 PM in Boise, ID, what time is it in Rio de Janeiro?
At 6:00 PM in Boise, clocks in Rio de Janeiro show 9:00 PM.
When do working hours in Boise, ID, and in Rio de Janeiro overlap?
Working hours (9:00 AM–6:00 PM) overlap from 9:00 AM to 3:00 PM in Boise, which is 12:00 PM to 6:00 PM in Rio de Janeiro.
When is it already the next day in Rio de Janeiro?
From 9:00 PM in Boise, ID, it is already the next day in Rio de Janeiro. The other way round, until 3:00 AM in Rio de Janeiro it is still the previous day in Boise.
Does the time gap between Boise, ID, and Rio de Janeiro change during the year?
Yes – daylight saving time is used in Boise but not in Rio de Janeiro. From November 1, 2026, Rio de Janeiro will be 4 hours ahead of Boise.
