Rio de Janeiro to Alamosa, CO: time difference
Alamosa, CO 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 01:34 1:34 AM Alamosa, CO 22:34 10:34 PM You –:–
01:34 1:34 AM
Brasilia Standard Time · UTC-3
☀️ 05:15 · 🌙 18:01
22:34 10:34 PM
Mountain Daylight Time · UTC-6
☀️ 07:18 · 🌙 18:20
·
−3 h
Alamosa, CO is 3 h behind Rio de Janeiro.
When you, Rio de Janeiro and Alamosa, CO 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
🇺🇸 Alamosa, CO
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 | 🇺🇸 Alamosa, CO |
|---|---|---|
| Local time | 01:34 | 22:34 |
| Local date | Thursday, October 22, 2026 | Wednesday, October 21, 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/Denver |
| Daylight saving | Not observed | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 05:15 | 07:18 |
| Sunset | 18:01 | 18:20 |
| Daylight | 12 h 45 min | 11 h 2 min |
| People on this clock | 6,211,223 | 10,000 |
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 Alamosa, CO: common questions
How many hours behind Rio de Janeiro is Alamosa, CO?
The clocks in Alamosa are 3 hours behind those in Rio de Janeiro (UTC−6 and UTC−3).
What time is it in Alamosa, CO, 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 Alamosa.
What time is it in Alamosa, CO, when it is 6:00 PM in Rio de Janeiro?
When it is 6:00 PM in Rio de Janeiro, it is 3:00 PM in Alamosa.
When do working hours in Rio de Janeiro and in Alamosa, CO, overlap?
Working hours (9:00 AM–6:00 PM) overlap from 12:00 PM to 6:00 PM in Rio de Janeiro, which is 9:00 AM to 3:00 PM in Alamosa.
When is it still the previous day in Alamosa, CO?
Until 3:00 AM in Rio de Janeiro it is still the previous day in Alamosa. The other way round, from 9:00 PM in Alamosa it is already the next day in Rio de Janeiro.
Does the time difference between Rio de Janeiro and Alamosa, CO, change?
Yes. The clocks change only in Alamosa. From November 1, 2026, Alamosa will be 4 hours behind Rio de Janeiro.
