Rio de Janeiro to Hamilton, MT: time difference
Hamilton, MT 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 06:29 6:29 AM Hamilton, MT 03:29 3:29 AM You –:–
06:29 6:29 AM
Brasilia Standard Time · UTC-3
☀️ 05:15 · 🌙 18:01
03:29 3:29 AM
Mountain Daylight Time · UTC-6
☀️ 08:04 · 🌙 18:39
·
−3 h
Hamilton, MT is 3 h behind Rio de Janeiro.
When you, Rio de Janeiro and Hamilton, MT 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
🇺🇸 Hamilton, MT
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 | 🇺🇸 Hamilton, MT |
|---|---|---|
| Local time | 06:29 | 03:29 |
| Local date | Thursday, October 22, 2026 | Thursday, October 22, 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 | 08:04 |
| Sunset | 18:01 | 18:39 |
| Daylight | 12 h 45 min | 10 h 35 min |
| People on this clock | 6,211,223 | 62,447 |
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 Hamilton, MT: common questions
How many hours behind Rio de Janeiro is Hamilton, MT?
The clocks in Hamilton are 3 hours behind those in Rio de Janeiro (UTC−6 and UTC−3).
What time is it in Hamilton, MT, at the start of the working day in Rio de Janeiro?
The working day in Rio de Janeiro starts at 9:00 AM; in Hamilton it is 6:00 AM at that moment.
What time is it in Hamilton, MT, 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 Hamilton.
Is there a time when both Rio de Janeiro and Hamilton, MT, are at work?
Yes: from 12:00 PM to 6:00 PM in Rio de Janeiro (9:00 AM to 3:00 PM in Hamilton), the working days (9:00 AM–6:00 PM) overlap.
When does the date change in Hamilton, MT, compared with Rio de Janeiro?
The new day starts in Hamilton later: until 3:00 AM in Rio de Janeiro, it is still the previous day there. From 9:00 PM in Hamilton, Rio de Janeiro is already on the next day.
Does the time difference between Rio de Janeiro and Hamilton, MT, change?
Yes. The clocks change only in Hamilton. From November 1, 2026, Hamilton will be 4 hours behind Rio de Janeiro.
