MST to BRT
+4hMST
MSTSOURCEBRT
BRTGreen rows indicate typical business hours (9 AM - 5 PM)
MST and BRT on the World Map
The map below highlights the MST (Mountain Standard Time) and BRT (Brasilia Time) timezone regions across the globe.
MST – Mountain Standard Time
UTC-07:00Mountain Standard Time (MST) is the time zone for the Mountain region of North America, 7 hours behind UTC.
- •Arizona does not observe daylight saving time, staying on MST year-round.
- •The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
- •Denver, the 'Mile High City', is the largest city fully in MST.
- •MST covers 6 US states entirely and parts of several others.
BRT – Brasilia Time
UTC-03:00Brasilia Time (BRT) is the time zone for eastern Brazil, 3 hours behind UTC.
- •Brazil abolished daylight saving time in 2019.
- •São Paulo is the largest city in the Southern Hemisphere.
- •BRT is 2 hours ahead of EST.
- •Brazil spans four different time zones.
- •The B3 stock exchange in São Paulo operates on BRT.
MST vs BRT: Offsets, DST and Best Call Times
MST runs on Mountain Standard Time (MST) at UTC-07:00. BRT runs on Brasilia Time (BRT) at UTC-03:00. That puts MST 4 hours ahead of BRT — a difference of +4h at the current offsets.
In practice, when it is 9:00 AM in MST it is 1:00 PM in BRT. Midnight in MST is 4:00 AM in BRT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MST to BRT time conversion table
| MST (MST) | BRT (BRT) | Day |
|---|---|---|
| 12:00 AM | 4:00 AM | same day |
| 6:00 AM | 10:00 AM | same day |
| 7:00 AM | 11:00 AM | same day |
| 8:00 AM | 12:00 PM | same day |
| 9:00 AM | 1:00 PM | same day |
| 12:00 PM | 4:00 PM | same day |
| 3:00 PM | 7:00 PM | same day |
| 5:00 PM | 9:00 PM | same day |
| 6:00 PM | 10:00 PM | same day |
| 9:00 PM | 1:00 AM | next day |
Why people convert MST to BRT time
- Scheduling a call from MST to BRT: a 10:00 AM start in MST lands at 2:00 PM in BRT, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both MST and BRT are inside the 9-to-5 working day between 9:00 AM and 1:00 PM MST time (1:00 PM–5:00 PM BRT). That is roughly 4 hours of usable overlap.
- Booking travel or deliveries: tracking BRT local time against MST keeps pickup windows and arrival estimates honest across the +4h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM MST" is unambiguous; "3 PM" across a +4h gap is not.
- Block 9:00 AM–1:00 PM MST as the recurring meeting window if you work primarily from MST and need BRT colleagues present.
About MST (Mountain Standard Time)
Mountain Standard Time (MST) covers the Rocky Mountain region of the United States and Canada. Arizona is notable for not observing daylight saving time, staying on MST year-round (except the Navajo Nation). The time zone includes major cities like Denver, Phoenix, Calgary, and Salt Lake City. During summer, most areas switch to Mountain Daylight Time (MDT, UTC-06:00).
About BRT (Brasilia Time)
Brasilia Time (BRT) is the standard time in the most populous regions of Brazil, including São Paulo, Rio de Janeiro, and the capital Brasília. Brazil abolished daylight saving time in 2019, so BRT is now observed year-round in these regions. Brazil spans four time zones in total.
Best time to call between MST and BRT
Both MST and BRT sit inside the 9 AM – 5 PM working day between 9:00 AM–1:00 PM MST, which is 1:00 PM–5:00 PM BRT. That gives roughly 4 hours of shared time — the safest window for a live call or meeting.
Business hours overlap
MST and BRT overlap for about 4 hours during the working day — enough for meetings if you avoid the edges of the window.
MST is 4 hours ahead of BRT (MST UTC-07:00 → BRT UTC-03:00). The shared working window is 9:00 AM–1:00 PM MST. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
MST
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
BRT
Does not observe DST
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between MST and BRT?
MST (MST, UTC-07:00) is 4 hours ahead of BRT (BRT, UTC-03:00). The gap is currently +4h.
How do I convert MST time to BRT time?
Add +4h to MST local time. For example, 9:00 AM in MST is 1:00 PM in BRT.
What time is it in BRT right now?
BRT uses BRT at UTC-03:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +4h offset from MST.
What is the best time to call BRT from MST?
Call between 9:00 AM and 1:00 PM MST — that maps to 1:00 PM–5:00 PM BRT and keeps both parties inside the working day.
Which is ahead, MST or BRT?
MST is 4 hours ahead of BRT. When it is 12:00 PM in MST it is 4:00 PM in BRT.
Does daylight saving time affect the MST–BRT difference?
Neither zone observes daylight saving time, so the +4h offset between MST and BRT is fixed all year.
Which other cities share MST's time zone?
MST also covers Denver, Phoenix, Salt Lake City, Calgary, Edmonton, Albuquerque, El Paso, Tucson and 2 more.
Which countries use MST, MST's zone?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Is there a day difference between MST and BRT?
Not normally. The +4h gap only pushes the date over for late-evening times.
What is the time difference between MST and BRT?
BRT is +4h from MST.
What timezone is MST in?
MST operates on its local timezone.
What timezone is BRT in?
BRT operates on its local timezone.
Which countries use MST (Mountain Standard Time)?
MST is used in United States (Mountain), Canada (Alberta), Mexico (Chihuahua, Sonora).
Does MST observe daylight saving time?
Yes, MST switches to MDT during summer months.
What are some interesting facts about MST?
Arizona does not observe daylight saving time, staying on MST year-round. The Navajo Nation in Arizona does observe DST, unlike the rest of the state.
Which cities are in the BRT timezone?
Major cities in the BRT timezone include São Paulo, Rio de Janeiro, Brasília, Belo Horizonte, Salvador, Fortaleza, Recife, Curitiba.
What is the UTC offset for BRT?
Brasilia Time (BRT) is at UTC-03:00.
What should I know about the BRT timezone?
Brazil abolished daylight saving time in 2019. São Paulo is the largest city in the Southern Hemisphere.
When is it midnight in MST, what time is it in BRT?
When it is 12:00 AM (midnight) in MST (MST), it is +4h later in BRT (BRT).
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See every conversion from MST →·See every conversion from BRT →