Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between mst and brt?
Mountain Standard Time (mst) is UTC-6 and Brasilia Time (brt) is UTC-3. The difference between them is 3 hours.
Where is mst used?
Mountain Standard Time (mst) is used in USA and surrounding regions. The IANA timezone identifier is America/Denver.
Where is brt used?
Brasilia Time (brt) is used in Brazil and surrounding regions. The IANA timezone identifier is America/Sao_Paulo.
How do I convert mst to brt?
Use the interactive converter above. Drag the time slider to any mst time and the brt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
MST (Denver) is 3 hours behind BRT (São Paulo). When MST (Denver) clocks hit noon, BRT (São Paulo) reads 15:00.
MST (Denver) runs on America/Denver; BRT (São Paulo) runs on America/Sao_Paulo. Together they are 3 hours apart.
Business hours comparison
Every working day, MST (Denver) and BRT (São Paulo) are both in business hours for 5 hours simultaneously.
00:0006:0012:0018:0024:00
MST (Denver)
BRT (São Paulo)
Overlap (5h)
Best times to schedule a meeting
There is a 5-hour daily window where both locations are in business hours. The 3 best slots are listed below.
09:00 Denver / 12:00 São Paulo✓ Both working
10:00 Denver / 13:00 São Paulo✓ Both working
11:00 Denver / 14:00 São Paulo✓ Both working
Working hours defined as 09:00–17:00 local time for each location.
Holiday calendar for both locations
⚡ Both locations have upcoming holidays, check availability before scheduling.
MST (Denver)7 holidays
Jul 3Independence DaySOON
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
Nov 11Veterans Day
BRT (São Paulo)7 holidays
Jul 9Constitutionalist Revolution of 1932SOON
Sep 7Independence Day
Oct 12Our Lady of Aparecida
Nov 2All Souls' Day
Nov 15Republic Proclamation Day
Working across MST (Denver) and BRT (São Paulo)
The 3-hour gap between MST (Denver) (USA) and BRT (São Paulo) (Brazil) requires some planning — but a 5-hour daily overlap means both teams can connect in real time without unusual scheduling.
💡 Best practice for cross-timezone meetings
✅
If you are in MST (Denver), aim for 09:00–10:00, which corresponds to 12:00–13:00 in BRT (São Paulo) — both teams are within working hours.
✅
If you are in MST (Denver), aim for 10:00–11:00, which corresponds to 13:00–14:00 in BRT (São Paulo) — both teams are within working hours.
✅
If you are in MST (Denver), aim for 11:00–12:00, which corresponds to 14:00–15:00 in BRT (São Paulo) — both teams are within working hours.
Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.
Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am MST (Denver)".
