BRT to MT Time Converter
MT is 3 hours behind BRT. BRT is UTC-3:00, and The US Mountain states are currently on MDT (UTC-6:00).
Best Time to Call Between BRT and MT
Both zones are inside normal business hours between 12:00 PM and 5:00 PM BRT — that's 9:00 AM to 2:00 PM MT. That's a 5-hour window.
both at work BRT only MT only neither — hours along the strip are BRT.
Common Times Converted
BRT on the left, MT on the right.
BRT to MT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| BRT | MT | Working hours |
|---|---|---|
| 12:00 AM | 9:00 PM prev day | — |
| 1:00 AM | 10:00 PM prev day | — |
| 2:00 AM | 11:00 PM prev day | — |
| 3:00 AM | 12:00 AM | — |
| 4:00 AM | 1:00 AM | — |
| 5:00 AM | 2:00 AM | — |
| 6:00 AM | 3:00 AM | — |
| 7:00 AM | 4:00 AM | — |
| 8:00 AM | 5:00 AM | — |
| 9:00 AM | 6:00 AM | BRT only |
| 10:00 AM | 7:00 AM | BRT only |
| 11:00 AM | 8:00 AM | BRT only |
| 12:00 PM | 9:00 AM | Both zones |
| 1:00 PM | 10:00 AM | Both zones |
| 2:00 PM | 11:00 AM | Both zones |
| 3:00 PM | 12:00 PM | Both zones |
| 4:00 PM | 1:00 PM | Both zones |
| 5:00 PM | 2:00 PM | MT only |
| 6:00 PM | 3:00 PM | MT only |
| 7:00 PM | 4:00 PM | MT only |
| 8:00 PM | 5:00 PM | — |
| 9:00 PM | 6:00 PM | — |
| 10:00 PM | 7:00 PM | — |
| 11:00 PM | 8:00 PM | — |
What BRT and MT Actually Are
BRT — Brasília Time
São Paulo, Rio de Janeiro, Brasília, Salvador. Standing at UTC-3:00 as written, and the region does not change its clocks, so that offset holds all year. Brazil abolished daylight saving in 2019, so this offset no longer shifts in the southern summer.
Brazil ran daylight saving for decades before abolishing it in 2019, on the argument that changed electricity consumption patterns had erased the savings.
MT — Mountain Time
Denver, Salt Lake City, Calgary, Edmonton — and Phoenix, which does not change its clocks. Standing at UTC-7:00 as written, and the region does change its clocks, so its live offset moves by an hour twice a year. The next change is on Sunday, November 1, 2026, to MST.
Mountain Time contains the most conspicuous daylight saving exception in North America: Arizona, which has opted out since 1968.
What This Means in Practice
This gap is not fixed
MT changes its clocks and BRT does not, so the difference between them moves by an hour twice a year. A recurring meeting set now will drift for one side from Sunday, November 1, 2026 unless someone resets it.
Major Cities in Each Zone
Cities on BRT
Cities on MT
Frequently Asked Questions
What is the time difference between BRT and MT?
MT is 3 hours behind BRT. That is the live figure. Taken strictly as written, the gap between BRT and MT is 4 hours — the two differ because at least one of these regions is currently on daylight saving.
What is 9:00 AM BRT in MT?
9:00 AM BRT is 6:00 AM MT.
What are the best hours to schedule a call between BRT and MT?
Between 12:00 PM and 5:00 PM BRT, which is 9:00 AM to 2:00 PM MT. Both sides are inside normal business hours through that window.
Does the difference between BRT and MT change during the year?
Yes. MT observes daylight saving and BRT does not, so the gap shifts by an hour at least twice a year. The next clock change is on Sunday, November 1, 2026.
Does BRT always mean Brasília Time?
Brazil abolished daylight saving in 2019, so this offset no longer shifts in the southern summer.