Rio de Janeiro Time to MST Converter
MST is 4 hours behind BRT. 9:00 AM BRT = 5:00 AM MST.
MST is 4 hours behind BRT at the moment. To convert Rio de Janeiro Time to MST, subtract 4 hours from the Rio de Janeiro Time time: 9:00 AM BRT = 5:00 AM MST.
Rio de Janeiro Time (Rio de Janeiro time) is used in Rio de Janeiro, Brazil. MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year.
Most of Arizona uses MST all year and does not switch to MDT.
Rio de Janeiro Time to MST time conversion table
Rio de Janeiro Time to MST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| Rio de Janeiro Time | MST |
|---|---|
| 12:00 AM | 8:00 PM−1 |
| 1:00 AM | 9:00 PM−1 |
| 2:00 AM | 10:00 PM−1 |
| 3:00 AM | 11:00 PM−1 |
| 4:00 AM | 12:00 AM |
| 5:00 AM | 1:00 AM |
| 6:00 AM | 2:00 AM |
| 7:00 AM | 3:00 AM |
| Rio de Janeiro Time | MST |
|---|---|
| 8:00 AM | 4:00 AM |
| 9:00 AM | 5:00 AM |
| 10:00 AM | 6:00 AM |
| 11:00 AM | 7:00 AM |
| 12:00 PM | 8:00 AM |
| 1:00 PM | 9:00 AM |
| 2:00 PM | 10:00 AM |
| 3:00 PM | 11:00 AM |
| Rio de Janeiro Time | MST |
|---|---|
| 4:00 PM | 12:00 PM |
| 5:00 PM | 1:00 PM |
| 6:00 PM | 2:00 PM |
| 7:00 PM | 3:00 PM |
| 8:00 PM | 4:00 PM |
| 9:00 PM | 5:00 PM |
| 10:00 PM | 6:00 PM |
| 11:00 PM | 7:00 PM |
Conversion table from Rio de Janeiro Time to MST for 7 Nov 2026. A tick marks hours that fall between 9 AM and 5 PM in both places. +1 means the next day in MST, −1 the previous day.
- ✓ marks 9 AM–5 PM in both places
- Greyed times are night in the destination (10 PM–6 AM)
How to convert Rio de Janeiro Time to MST
Subtract 4 hours from the Rio de Janeiro Time time to get MST.
Example: 9:00 AM BRT = 5:00 AM MST.
Across midnight: 1:00 AM BRT = 9:00 PM MST (previous day). The date changes, so always check the day as well as the hour.
Time difference between Rio de Janeiro Time and MST
The time difference between Rio de Janeiro Time and MST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 31 Dec 2025 – 7 Mar 2026: MST is 4 hours behind of Rio de Janeiro Time.
- 8 Mar 2026 – 31 Oct 2026: MST is 3 hours behind of Rio de Janeiro Time.
- 1 Nov 2026 – 30 Dec 2026: MST is 4 hours behind of Rio de Janeiro Time.
Rio de Janeiro Time and MST during daylight saving time
- Rio de Janeiro Time does not observe daylight saving time; it stays on UTC−3 all year.
- MST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from MST (UTC−7) to MDT (UTC−6).
Best time for a meeting between Rio de Janeiro Time and MST
Rio de Janeiro Time and MST share 4 hours of the 9 AM–5 PM working day. Any time between 1:00 PM and 5:00 PM BRT lands between 9:00 AM and 1:00 PM MST, inside working hours for both.
Rio de Janeiro Time to MST FAQ
What is the time difference between Rio de Janeiro Time and MST?
Right now MST is 4 hours behind BRT. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM Rio de Janeiro Time in MST?
9:00 AM BRT is 5:00 AM MST.
What is 12 PM (noon) Rio de Janeiro Time in MST?
12:00 PM BRT is 8:00 AM MST.
Is MST ahead of or behind Rio de Janeiro Time?
MST is 4 hours behind BRT, so it is earlier in MST than in Rio de Janeiro Time.
Does Rio de Janeiro Time change for daylight saving time?
No. Rio de Janeiro Time stays on the same offset all year, so conversions never shift for daylight saving time.
Does MST change for daylight saving time?
Yes. MST next changes on 14 Mar 2027, when clocks go forward one hour from MST to MDT.
What is the best time for a meeting between Rio de Janeiro Time and MST?
Rio de Janeiro Time and MST share 4 hours of the 9 AM–5 PM working day. Any time between 1:00 PM and 5:00 PM BRT lands between 9:00 AM and 1:00 PM MST, inside working hours for both.
Is MT the same as MST?
MST is the winter (standard) name of Mountain Time (MT). From March to November the same clocks are called MDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert MST to Rio de Janeiro Time
Convert Rio de Janeiro Time to other time zones
Convert other time zones to MST
Updated 7 November 2026. Time zone data: IANA tz database.