AEST to MST converter
MST is usually 16 h behind AEST. It is 18 h behind AEST 1 Jan–8 Mar and 1 Nov–31 Dec 2026; It is 17 h behind AEST 8 Mar–4 Apr and 3 Oct–1 Nov 2026, because of daylight saving time.
AEST to MST table
For 4 July 2026, when MST is 16 h behind AEST. Other dates: see the table on the right.
| AEST | MST |
|---|---|
| 12:00 AM | 8:00 AM prev. day |
| 1:00 AM | 9:00 AM prev. day |
| 2:00 AM | 10:00 AM prev. day |
| 3:00 AM | 11:00 AM prev. day |
| 4:00 AM | 12:00 PM prev. day |
| 5:00 AM | 1:00 PM prev. day |
| 6:00 AM | 2:00 PM prev. day |
| 7:00 AM | 3:00 PM prev. day |
| 8:00 AM | 4:00 PM prev. day |
| 9:00 AM | 5:00 PM prev. day |
| 10:00 AM | 6:00 PM prev. day |
| 11:00 AM | 7:00 PM prev. day |
| 12:00 PM | 8:00 PM prev. day |
| 1:00 PM | 9:00 PM prev. day |
| 2:00 PM | 10:00 PM prev. day |
| 3:00 PM | 11:00 PM prev. day |
| 4:00 PM | 12:00 AM |
| 5:00 PM | 1:00 AM |
| 6:00 PM | 2:00 AM |
| 7:00 PM | 3:00 AM |
| 8:00 PM | 4:00 AM |
| 9:00 PM | 5:00 AM |
| 10:00 PM | 6:00 AM |
| 11:00 PM | 7:00 AM |
When the difference changes
Computed from the IANA tz database (release 2026c). Governments can change these rules; the live converter uses your browser’s own copy of the database.
| 2026: from (UTC) | until (UTC) | MST vs AEST |
|---|---|---|
| 1 January 2026 | 8 March 2026 | 18 h behind |
| 8 March 2026 | 4 April 2026 | 17 h behind |
| 4 April 2026 | 3 October 2026 | 16 h behind |
| 3 October 2026 | 1 November 2026 | 17 h behind |
| 1 November 2026 | 31 December 2026 | 18 h behind |
| 2027: from (UTC) | until (UTC) | MST vs AEST |
|---|---|---|
| 1 January 2027 | 14 March 2027 | 18 h behind |
| 14 March 2027 | 3 April 2027 | 17 h behind |
| 3 April 2027 | 2 October 2027 | 16 h behind |
| 2 October 2027 | 7 November 2027 | 17 h behind |
| 7 November 2027 | 31 December 2027 | 18 h behind |
AEST: Australian Eastern Time · AEST time now
Queensland (Brisbane) uses AEST all year; New South Wales, Victoria, the ACT and Tasmania switch to AEDT (UTC+11) from October to April.
MST: Mountain Time · MST time now
Arizona (America/Phoenix) stays on MST all year, so for part of the year it matches Pacific Time instead of Denver.
Related converters
Questions
What is the time difference between AEST and MST?
MST is usually 16 h behind AEST. It is 18 h behind AEST 1 Jan–8 Mar and 1 Nov–31 Dec 2026; It is 17 h behind AEST 8 Mar–4 Apr and 3 Oct–1 Nov 2026, because of daylight saving time.
What is 9 am AEST in MST?
9:00 am AEST is 5:00 PM MST the previous day, on dates when the usual difference applies. Use the converter above for any specific date.
Which AEST does this page use?
Queensland (Brisbane) uses AEST all year; New South Wales, Victoria, the ACT and Tasmania switch to AEDT (UTC+11) from October to April.
Which MST does this page use?
Arizona (America/Phoenix) stays on MST all year, so for part of the year it matches Pacific Time instead of Denver.