MST to Adelaide Time Converter
ACDT is 17 hours 30 minutes ahead of MST. 9:00 AM MST = 2:30 AM ACDT (next day).
ACDT is 17 hours 30 minutes ahead of MST at the moment. To convert MST to Adelaide Time, add 17 hours 30 minutes to the MST time: 9:00 AM MST = 2:30 AM ACDT (next day).
MST (Mountain Time) is used in Denver, Salt Lake City, Albuquerque, Calgary, Edmonton; Phoenix (Arizona) all year. Adelaide Time (Adelaide time) is used in Adelaide, Australia.
Most of Arizona uses MST all year and does not switch to MDT.
MST to Adelaide Time time conversion table
MST to Adelaide Time on 6 Nov 2026. Today's date. Highlighted rows are 9 AM–5 PM in both places.
| MST | Adelaide Time | Day |
|---|---|---|
| 12:00 AM MST | 5:30 PM ACDT | — |
| 1:00 AM MST | 6:30 PM ACDT | — |
| 2:00 AM MST | 7:30 PM ACDT | — |
| 3:00 AM MST | 8:30 PM ACDT | — |
| 4:00 AM MST | 9:30 PM ACDT | — |
| 5:00 AM MST | 10:30 PM ACDT | night |
| 6:00 AM MST | 11:30 PM ACDT | night |
| 7:00 AM MST | 12:30 AM ACDT | next day |
| 8:00 AM MST | 1:30 AM ACDT | next day |
| 9:00 AM MST | 2:30 AM ACDT | next day |
| 10:00 AM MST | 3:30 AM ACDT | next day |
| 11:00 AM MST | 4:30 AM ACDT | next day |
| 12:00 PM MST | 5:30 AM ACDT | next day |
| 1:00 PM MST | 6:30 AM ACDT | next day |
| 2:00 PM MST | 7:30 AM ACDT | next day |
| 3:00 PM MST | 8:30 AM ACDT | next day |
| 4:00 PM MST | 9:30 AM ACDT | work hours |
| 5:00 PM MST | 10:30 AM ACDT | next day |
| 6:00 PM MST | 11:30 AM ACDT | next day |
| 7:00 PM MST | 12:30 PM ACDT | next day |
| 8:00 PM MST | 1:30 PM ACDT | next day |
| 9:00 PM MST | 2:30 PM ACDT | next day |
| 10:00 PM MST | 3:30 PM ACDT | next day |
| 11:00 PM MST | 4:30 PM ACDT | next day |
- Work rows — 9 AM–5 PM in both places
- Night in the destination (10 PM–6 AM)
How to convert MST to Adelaide Time
Add 17 hours 30 minutes to the MST time to get Adelaide Time.
Example: 9:00 AM MST = 2:30 AM ACDT (next day).
Across midnight: 10:00 PM MST = 3:30 PM ACDT (next day). The date changes, so always check the day as well as the hour.
Time difference between MST and Adelaide Time
The time difference between MST and Adelaide 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: Adelaide Time is 17 hours 30 minutes ahead of MST.
- 8 Mar 2026 – 3 Apr 2026: Adelaide Time is 16 hours 30 minutes ahead of MST.
- 4 Apr 2026 – 2 Oct 2026: Adelaide Time is 15 hours 30 minutes ahead of MST.
- 3 Oct 2026 – 31 Oct 2026: Adelaide Time is 16 hours 30 minutes ahead of MST.
- 1 Nov 2026 – 30 Dec 2026: Adelaide Time is 17 hours 30 minutes ahead of MST.
MST and Adelaide 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).
- Adelaide Time next changes on 4 Apr 2027: clocks go back one hour at 02:59 local time, from ACDT (UTC+10:30) to ACST (UTC+9:30).
Best time for a meeting between MST and Adelaide Time
MST and Adelaide Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 2:00 PM MST, which is 7:30 AM ACDT.
MST to Adelaide Time FAQ
What is the time difference between MST and Adelaide Time?
Right now ACDT is 17 hours 30 minutes ahead of MST. The gap changes 5 times in 2026 because the two sides switch to daylight saving time on different dates.
What is 9 AM MST in Adelaide Time?
9:00 AM MST is 2:30 AM ACDT (next day).
What is 12 PM (noon) MST in Adelaide Time?
12:00 PM MST is 5:30 AM ACDT (next day).
Is Adelaide Time ahead of or behind MST?
ACDT is 17 hours 30 minutes ahead of MST, so it is later in Adelaide 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 Adelaide Time change for daylight saving time?
Yes. Adelaide Time next changes on 4 Apr 2027, when clocks go back one hour from ACDT to ACST.
What is the best time for a meeting between MST and Adelaide Time?
MST and Adelaide Time have no shared 9 AM–5 PM window. The earliest slot that is reasonable on both sides is 2:00 PM MST, which is 7:30 AM ACDT.
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 Adelaide Time to MST
Convert MST to other time zones
Convert other time zones to Adelaide Time
Learn more
Updated 6 November 2026. Time zone data: IANA tz database.