Buenos Aires Time to MST Converter
MST is 4 hours behind ART. 9:00 AM ART = 5:00 AM MST.
MST is 4 hours behind ART at the moment. To convert Buenos Aires Time to MST, subtract 4 hours from the Buenos Aires Time time: 9:00 AM ART = 5:00 AM MST.
Buenos Aires Time (Buenos Aires time) is used in Buenos Aires, Argentina. MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year.
Most of Arizona uses MST all year and does not switch to MDT.
Buenos Aires Time to MST time conversion table
Buenos Aires Time to MST on 7 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| Buenos Aires Time | MST | Day |
|---|---|---|
| 12:00 AM ART | 8:00 PM MST | previous day |
| 1:00 AM ART | 9:00 PM MST | previous day |
| 2:00 AM ART | 10:00 PM MST | previous day |
| 3:00 AM ART | 11:00 PM MST | previous day |
| 4:00 AM ART | 12:00 AM MST | night |
| 5:00 AM ART | 1:00 AM MST | night |
| 6:00 AM ART | 2:00 AM MST | night |
| 7:00 AM ART | 3:00 AM MST | night |
| 8:00 AM ART | 4:00 AM MST | night |
| 9:00 AM ART | 5:00 AM MST | night |
| 10:00 AM ART | 6:00 AM MST | — |
| 11:00 AM ART | 7:00 AM MST | — |
| 12:00 PM ART | 8:00 AM MST | — |
| 1:00 PM ART | 9:00 AM MST | work hours |
| 2:00 PM ART | 10:00 AM MST | work hours |
| 3:00 PM ART | 11:00 AM MST | work hours |
| 4:00 PM ART | 12:00 PM MST | work hours |
| 5:00 PM ART | 1:00 PM MST | — |
| 6:00 PM ART | 2:00 PM MST | — |
| 7:00 PM ART | 3:00 PM MST | — |
| 8:00 PM ART | 4:00 PM MST | — |
| 9:00 PM ART | 5:00 PM MST | — |
| 10:00 PM ART | 6:00 PM MST | — |
| 11:00 PM ART | 7:00 PM MST | — |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert Buenos Aires Time to MST
Subtract 4 hours from the Buenos Aires Time time to get MST.
Example: 9:00 AM ART = 5:00 AM MST.
Across midnight: 1:00 AM ART = 9:00 PM MST (previous day). The date changes, so always check the day as well as the hour.
Time difference between Buenos Aires Time and MST
The time difference between Buenos Aires Time and MST is not the same all year, because the two sides change for daylight saving time on different dates. In 2026 it works out like this:
- 31 Dec 2025 – 7 Mar 2026: MST is 4 hours behind of Buenos Aires Time.
- 8 Mar 2026 – 31 Oct 2026: MST is 3 hours behind of Buenos Aires Time.
- 1 Nov 2026 – 30 Dec 2026: MST is 4 hours behind of Buenos Aires Time.
Buenos Aires Time and MST during daylight saving time
- Buenos Aires Time does not observe daylight saving time; it stays on UTC−3 all year.
- MST next changes on 14 Mar 2027: clocks go forward one hour at 01:59 local time, from MST (UTC−7) to MDT (UTC−6).
Best time for a meeting between Buenos Aires Time and MST
Buenos Aires Time and MST share 4 hours of the 9 AM–5 PM working day. Any time between 1:00 PM and 5:00 PM ART lands between 9:00 AM and 1:00 PM MST, inside working hours for both.
Buenos Aires Time to MST FAQ
What is the time difference between Buenos Aires Time and MST?
Right now MST is 4 hours behind ART. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM Buenos Aires Time in MST?
9:00 AM ART is 5:00 AM MST.
What is 12 PM (noon) Buenos Aires Time in MST?
12:00 PM ART is 8:00 AM MST.
Is MST ahead of or behind Buenos Aires Time?
MST is 4 hours behind ART, so it is earlier in MST than in Buenos Aires Time.
Does Buenos Aires Time change for daylight saving time?
No. Buenos Aires Time stays on the same offset all year, so conversions never shift for daylight saving time.
Does MST change for daylight saving time?
Yes. MST next changes on 14 Mar 2027, when clocks go forward one hour from MST to MDT.
What is the best time for a meeting between Buenos Aires Time and MST?
Buenos Aires Time and MST share 4 hours of the 9 AM–5 PM working day. Any time between 1:00 PM and 5:00 PM ART lands between 9:00 AM and 1:00 PM MST, inside working hours for both.
Is MT the same as MST?
MST is the winter (standard) name of Mountain Time (MT). From March to November the same clocks are called MDT. This converter always uses the one in force on the date you choose.
Related conversions
Convert MST to Buenos Aires Time
Convert Buenos Aires Time to other time zones
Convert other time zones to MST
Updated 7 November 2026. Time zone data: IANA tz database.