Offset
The time difference between Mountain Time and Brazzaville is 7 hours.
Mountain Time (MDT) is behind Brazzaville (GMT+1).
MDT: UTC-6
GMT+1: UTC+1
Mountain Time is currently observing daylight saving time; Brazzaville is not.
When to schedule
Business-hours overlap: 9 AM–10 AM in Mountain Time (4 PM–5 PM in Brazzaville).
Both teams are in working hours during this window on weekdays.
Suggested time: 9:00 AM Mountain Time (4:00 PM Brazzaville).
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
United States
- New Year's DayThu, Jan 1
- Martin Luther King, Jr. DayMon, Jan 19
- Presidents DayMon, Feb 16
- Memorial DayMon, May 25
- Juneteenth National Independence DayFri, Jun 19
- Independence DayFri, Jul 3
- Labour DayMon, Sep 7
- Columbus DayMon, Oct 12
- Veterans DayWed, Nov 11
- Thanksgiving DayThu, Nov 26
- Christmas DayFri, Dec 25
Republic of the Congo
- New Year's DayThu, Jan 1
- Easter SundaySun, Apr 5
- Easter MondayMon, Apr 6
- Labour DayFri, May 1
- Ascension DayThu, May 14
- Whit MondayMon, May 25
- Reconciliation DayWed, Jun 10
- National DaySat, Aug 15
- All Saints' DaySun, Nov 1
- Republic DaySat, Nov 28
- Christmas DayFri, Dec 25
About these zones
Mountain Time is also known as MST, or MDT. To call United States, dial +1.
Brazzaville uses West Africa Time. To call Republic of the Congo, dial +242.
Brazzaville is approximately 8,000 miles east of Mountain Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| MST | Brazzaville | Day |
|---|---|---|
| 12:00 am | 7:00 am | Same day |
| 1:00 am | 8:00 am | Same day |
| 2:00 am | 9:00 am | Same day |
| 3:00 am | 10:00 am | Same day |
| 4:00 am | 11:00 am | Same day |
| 5:00 am | 12:00 pm | Same day |
| 6:00 am | 1:00 pm | Same day |
| 7:00 am | 2:00 pm | Same day |
| 8:00 am | 3:00 pm | Same day |
| 9:00 am | 4:00 pm | Same day |
| 10:00 am | 5:00 pm | Same day |
| 11:00 am | 6:00 pm | Same day |
| 12:00 pm | 7:00 pm | Same day |
| 1:00 pm | 8:00 pm | Same day |
| 2:00 pm | 9:00 pm | Same day |
| 3:00 pm | 10:00 pm | Same day |
| 4:00 pm | 11:00 pm | Same day |
| 5:00 pm | 12:00 am | +1 day |
| 6:00 pm | 1:00 am | +1 day |
| 7:00 pm | 2:00 am | +1 day |
| 8:00 pm | 3:00 am | +1 day |
| 9:00 pm | 4:00 am | +1 day |
| 10:00 pm | 5:00 am | +1 day |
| 11:00 pm | 6:00 am | +1 day |
Daylight saving time
Mountain Time observes daylight saving time; Brazzaville does not. The offset between the two zones changes when Mountain Time transitions: on Sunday, November 1, 2026, clocks fall back from MDT to MST.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 5:51 AM
- Sunset
- 8:23 PM
- Day length
- 14h 33m
- Sunrise
- 6:09 AM
- Sunset
- 6:03 PM
- Day length
- 11h 54m
Daylight overlap: 5h 12m — 5:51 AM–11:03 AM in Mountain Time (12:51 PM–6:03 PM in Brazzaville). Both locations are in daylight during this window.
Cities in these zones
Cities in Mountain Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Mountain Time
- BJC
- DEN
- OGD
- SLC
Airports in West Africa Time
- BZV
Related conversions
Common conversions
- What is 9:00 am MST in Brazzaville?
- 9:00 am MST is 4:00 pm Brazzaville.
- What is 12:00 pm MST in Brazzaville?
- 12:00 pm MST is 7:00 pm Brazzaville.
- What is 12:30 pm MST in Brazzaville?
- 12:30 pm MST is 7:30 pm Brazzaville.
- What is 2:00 pm MST in Brazzaville?
- 2:00 pm MST is 9:00 pm Brazzaville.
- What is 5:00 pm MST in Brazzaville?
- 5:00 pm MST is 12:00 am Brazzaville, the next day.
- What is 11:30 pm MST in Brazzaville?
- 11:30 pm MST is 6:30 am Brazzaville, the next day.