ACST to MST converter

Australian Central Time (Adelaide) to Mountain Time (Denver, Salt Lake City, Calgary).

ACST10:37 AMSat 31 Oct 2026

→

MST6:07 PMFri 30 Oct 2026

MST is 16 h 30 min behind ACST.

Pick a time in ACST

⇄ MST to ACST

9:00 AM ACST = 4:30 PM MST previous day

Best time to meet

The best time to meet is between 9:00 AM and 10:00 AM ACST, which is 4:30 PM to 5:30 PM MST. Both sides are then inside 9 AM to 5 PM.

ACST to MST time table

For 31 Oct 2026. Green rows: both sides between 9 AM and 5 PM.

ACST	MST
12:00 AM ACST	7:30 AM MST previous day
1:00 AM ACST	8:30 AM MST previous day
2:00 AM ACST	9:30 AM MST previous day
3:00 AM ACST	10:30 AM MST previous day
4:00 AM ACST	11:30 AM MST previous day
5:00 AM ACST	12:30 PM MST previous day
6:00 AM ACST	1:30 PM MST previous day
7:00 AM ACST	2:30 PM MST previous day
8:00 AM ACST	3:30 PM MST previous day
9:00 AM ACST	4:30 PM MST previous day
10:00 AM ACST	5:30 PM MST previous day
11:00 AM ACST	6:30 PM MST previous day
12:00 PM ACST	7:30 PM MST previous day
1:00 PM ACST	8:30 PM MST previous day
2:00 PM ACST	9:30 PM MST previous day
3:00 PM ACST	10:30 PM MST previous day
4:00 PM ACST	11:30 PM MST previous day
5:00 PM ACST	12:30 AM MST
6:00 PM ACST	1:30 AM MST
7:00 PM ACST	2:30 AM MST
8:00 PM ACST	3:30 AM MST
9:00 PM ACST	4:30 AM MST
10:00 PM ACST	5:30 AM MST
11:00 PM ACST	6:30 AM MST

Quick answers

9:00 AM ACST = 4:30 PM MST (previous day)
12:00 PM ACST = 7:30 PM MST (previous day)
3:00 PM ACST = 10:30 PM MST (previous day)
5:00 PM ACST = 12:30 AM MST
9:00 AM MST = 1:30 AM ACST (next day)
12:00 PM MST = 4:30 AM ACST (next day)
5:00 PM MST = 9:30 AM ACST (next day)

Does the gap change during the year?

Yes, because of daylight saving. Until 1 Nov 2026: MST is 16 h 30 min behind ACST. From 1 Nov 2026 to 14 Mar 2027: MST is 17 h 30 min behind ACST. From 14 Mar 2027 to 4 Apr 2027: MST is 16 h 30 min behind ACST. From 4 Apr 2027 to 3 Oct 2027: MST is 15 h 30 min behind ACST. From 3 Oct 2027 to 7 Nov 2027: MST is 16 h 30 min behind ACST.

ACST next changes its clocks on 4 Apr 2027 (back 1 h, to UTC+9:30), then on 3 Oct 2027 (forward 1 h, to UTC+10:30). MST next changes its clocks on 1 Nov 2026 (back 1 h, to UTC−7), then on 14 Mar 2027 (forward 1 h, to UTC−6).

About ACST and MST

ACST here means Australian Central Time, the clock in Adelaide. Right now it is UTC+10:30. Strictly, ACST is the winter name; in summer these places use ACDT. This page follows their real clock all year.

MST here means Mountain Time, the clock in Denver, Salt Lake City, Calgary. Right now it is UTC−6. Strictly, MST is the winter name; in summer these places use MDT. This page follows their real clock all year.

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