MST to Buenos Aires Time Converter
ART is 4 hours ahead of MST. 9:00 AM MST = 1:00 PM ART.
ART is 4 hours ahead of MST at the moment. To convert MST to Buenos Aires Time, add 4 hours to the MST time: 9:00 AM MST = 1:00 PM ART.
MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year. Buenos Aires Time (Buenos Aires time) is used in Buenos Aires, Argentina.
Most of Arizona uses MST all year and does not switch to MDT.
MST to Buenos Aires Time time conversion table
MST to Buenos Aires Time on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| MST | Buenos Aires Time | Day |
|---|---|---|
| 12:00 AM MST | 4:00 AM ART | night |
| 1:00 AM MST | 5:00 AM ART | night |
| 2:00 AM MST | 6:00 AM ART | — |
| 3:00 AM MST | 7:00 AM ART | — |
| 4:00 AM MST | 8:00 AM ART | — |
| 5:00 AM MST | 9:00 AM ART | — |
| 6:00 AM MST | 10:00 AM ART | — |
| 7:00 AM MST | 11:00 AM ART | — |
| 8:00 AM MST | 12:00 PM ART | — |
| 9:00 AM MST | 1:00 PM ART | work hours |
| 10:00 AM MST | 2:00 PM ART | work hours |
| 11:00 AM MST | 3:00 PM ART | work hours |
| 12:00 PM MST | 4:00 PM ART | work hours |
| 1:00 PM MST | 5:00 PM ART | — |
| 2:00 PM MST | 6:00 PM ART | — |
| 3:00 PM MST | 7:00 PM ART | — |
| 4:00 PM MST | 8:00 PM ART | — |
| 5:00 PM MST | 9:00 PM ART | — |
| 6:00 PM MST | 10:00 PM ART | night |
| 7:00 PM MST | 11:00 PM ART | night |
| 8:00 PM MST | 12:00 AM ART | next day |
| 9:00 PM MST | 1:00 AM ART | next day |
| 10:00 PM MST | 2:00 AM ART | next day |
| 11:00 PM MST | 3:00 AM ART | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert MST to Buenos Aires Time
Add 4 hours to the MST time to get Buenos Aires Time.
Example: 9:00 AM MST = 1:00 PM ART.
Across midnight: 10:00 PM MST = 2:00 AM ART (next day). The date changes, so always check the day as well as the hour.
Time difference between MST and Buenos Aires Time
The time difference between MST and Buenos Aires Time 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: Buenos Aires Time is 4 hours ahead of MST.
- 8 Mar 2026 – 31 Oct 2026: Buenos Aires Time is 3 hours ahead of MST.
- 1 Nov 2026 – 30 Dec 2026: Buenos Aires Time is 4 hours ahead of MST.
MST and Buenos Aires Time during daylight saving time
- 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).
- Buenos Aires Time does not observe daylight saving time; it stays on UTC−3 all year.
Best time for a meeting between MST and Buenos Aires Time
MST and Buenos Aires Time share 4 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 1:00 PM MST lands between 1:00 PM and 5:00 PM ART, inside working hours for both.
MST to Buenos Aires Time FAQ
What is the time difference between MST and Buenos Aires Time?
Right now ART is 4 hours ahead of MST. The gap changes 3 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM MST in Buenos Aires Time?
9:00 AM MST is 1:00 PM ART.
What is 12 PM (noon) MST in Buenos Aires Time?
12:00 PM MST is 4:00 PM ART.
Is Buenos Aires Time ahead of or behind MST?
ART is 4 hours ahead of MST, so it is later in Buenos Aires Time than in MST.
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.
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.
What is the best time for a meeting between MST and Buenos Aires Time?
MST and Buenos Aires Time share 4 hours of the 9 AM–5 PM working day. Any time between 9:00 AM and 1:00 PM MST lands between 1:00 PM and 5:00 PM ART, 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 Buenos Aires Time to MST
Convert MST to other time zones
Convert other time zones to Buenos Aires Time
Updated 6 November 2026. Time zone data: IANA tz database.