Rio de Janeiro to Fort Collins, CO: time difference
Fort Collins, 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 04:49 4:49 AM Fort Collins, CO 01:49 1:49 AM You –:–
04:49 4:49 AM
Brasilia Standard Time · UTC-3
☀️ 05:26 · 🌙 17:55
01:49 1:49 AM
Mountain Daylight Time · UTC-6
☀️ 07:07 · 🌙 18:29
·
−3 h
Fort Collins, CO is 3 h behind Rio de Janeiro.
When you, Rio de Janeiro and Fort Collins, 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
🇺🇸 Fort Collins, 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 | 🇺🇸 Fort Collins, CO |
|---|---|---|
| Local time | 04:49 | 01:49 |
| 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/Denver |
| Daylight saving | Not observed | On summer time → UTC-7, Nov 1, 01:00 |
| Sunrise | 05:26 | 07:07 |
| Sunset | 17:55 | 18:29 |
| Daylight | 12 h 30 min | 11 h 23 min |
| People on this clock | 6,211,223 | 148,612 |
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 Fort Collins, CO: common questions
How far behind Rio de Janeiro is Fort Collins, CO?
Fort Collins is 3 hours behind Rio de Janeiro: UTC−6 against UTC−3.
What time is it in Fort Collins, 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 Fort Collins.
What time is it in Fort Collins, CO, at the end of the working day in Rio de Janeiro?
The working day in Rio de Janeiro ends at 6:00 PM; in Fort Collins it is 3:00 PM at that moment.
When is a good time to call Fort Collins, CO, from Rio de Janeiro?
Between 12:00 PM and 6:00 PM in Rio de Janeiro – that is 9:00 AM to 3:00 PM in Fort Collins – both places are within working hours (9:00 AM–6:00 PM).
Until what time in Rio de Janeiro is it still yesterday in Fort Collins, CO?
Before 3:00 AM in Rio de Janeiro, the date in Fort Collins has not changed yet. From 9:00 PM in Fort Collins, it is already the next day in Rio de Janeiro.
Does the time difference between Rio de Janeiro and Fort Collins, CO, change?
Yes. The clocks change only in Fort Collins. From November 1, 2026, Fort Collins will be 4 hours behind Rio de Janeiro.
