BRT to MDT Converter & Meeting Planner
Quick answer: 9:00 AM BRT = 6:00 AM MDT (fixed -03:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Brasília Time (BRT) and Mountain Daylight Time (MDT)? You need to account for the standard time difference. Mountain Daylight Time is normally 3 hours behind Brasília Time. Whether you are coordinating between teams in São Paulo and Rio de Janeiro and Denver and Salt Lake City, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM BRT = 9:00 PM MDT. The full 24-hour BRT to MDT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM BRT = 12:00 PM MDT.
| BRT Time | MDT Time |
|---|---|
| 12:00 AM (00:00) | 9:00 PM (21:00)-1 day |
| 1:00 AM (01:00) | 10:00 PM (22:00)-1 day |
| 2:00 AM (02:00) | 11:00 PM (23:00)-1 day |
| 3:00 AM (03:00) | 12:00 AM (00:00) |
| 4:00 AM (04:00) | 1:00 AM (01:00) |
| 5:00 AM (05:00) | 2:00 AM (02:00) |
| 6:00 AM (06:00) | 3:00 AM (03:00) |
| 7:00 AM (07:00) | 4:00 AM (04:00) |
| 8:00 AM (08:00) | 5:00 AM (05:00) |
| 9:00 AM (09:00) | 6:00 AM (06:00) |
| 10:00 AM (10:00) | 7:00 AM (07:00) |
| 11:00 AM (11:00) | 8:00 AM (08:00) |
| 12:00 PM (12:00) | 9:00 AM (09:00) |
| 1:00 PM (13:00) | 10:00 AM (10:00) |
| 2:00 PM (14:00) | 11:00 AM (11:00) |
| 3:00 PM (15:00) | 12:00 PM (12:00) |
| 4:00 PM (16:00) | 1:00 PM (13:00) |
| 5:00 PM (17:00) | 2:00 PM (14:00) |
| 6:00 PM (18:00) | 3:00 PM (15:00) |
| 7:00 PM (19:00) | 4:00 PM (16:00) |
| 8:00 PM (20:00) | 5:00 PM (17:00) |
| 9:00 PM (21:00) | 6:00 PM (18:00) |
| 10:00 PM (22:00) | 7:00 PM (19:00) |
| 11:00 PM (23:00) | 8:00 PM (20:00) |
Best time to call Denver from São Paulo
For most work calls, compare the normal business day in São Paulo (BRT) with the business day in Denver (MDT). BRT commonly covers South America, while MDT is mainly associated with North America.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
✅ The most practical overlap on 2026-07-05 is usually 12:00 PM - 6:00 PM BRT, which corresponds to 9:00 AM - 3:00 PM MDT. This window sits inside the typical BRT workday (9:00 AM - 6:00 PM) and the MDT workday (9:00 AM - 5:00 PM).
- DST Safety: BRT or MDT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- B3 (Brasil Bolsa Balcão): 10:00-17:00 local time in São Paulo.
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Frequently Asked Questions
What is the time difference between BRT and MDT?
During standard time, Mountain Daylight Time is 3 hours behind Brasília Time.
Does Brazil observe Daylight Saving Time?
Brazil officially abolished Daylight Saving Time by presidential decree in April 2019, ending a practice that had been observed in the country's southeastern states since 1985. BRT has remained fixed at UTC-3:00 every day of the year since then, meaning the B3 stock exchange, federal government, and all Brazilian commercial operations run on a permanent, unchanging offset.
Is BRT the same as Argentina Time (ART)?
BRT (Brasília Time) and ART (Argentina Time) share the identical UTC-3:00 offset and neither country observes Daylight Saving Time, making São Paulo and Buenos Aires permanently synchronized on the same clock. Despite the different official designations, a meeting set for 10:00 BRT in São Paulo falls at exactly 10:00 ART in Buenos Aires — a fixed relationship that never shifts seasonally.
When does MDT start and end?
MDT begins on the second Sunday in March at 02:00 local MST time, when clocks spring forward one hour from MST (UTC-7) to MDT (UTC-6). It ends on the first Sunday in November at 02:00 local MDT time, when clocks fall back to MST. In 2026, MDT runs from March 8 through November 1, covering the majority of the calendar year.
Is Arizona on MDT?
Most of Arizona — including Phoenix and Tucson — does not observe Daylight Saving Time and remains on MST (UTC-7) year-round under a state law in effect since 1968, meaning Arizona does not advance to MDT each March. The significant exception is the Navajo Nation, a sovereign territory spanning parts of northeastern Arizona, southeastern Utah, and northwestern New Mexico, which does observe DST and shifts to MDT on the standard federal schedule.