AEST to MST Converter
See the current time in AEST (Sydney) and MST (Denver) side by side, the exact time difference right now, and convert any time between the two zones.
AEST to MST Converter
Uses your browser's built-in, DST-aware time-zone data.
About converting AEST to MST
Australian Eastern Time (Sydney) and Mountain Time (Denver) are in different time zones, so a meeting, call or stream that's convenient in one may be early or late in the other. The clocks above update live and account for daylight saving automatically, so the time difference you see is the real one for today — not a fixed number that goes stale twice a year.
To plan across the two, type a time into the AEST box (or tap a quick preset) and read the MST equivalent, including a "next day" or "previous day" note when the conversion crosses midnight. For any other pair of zones or cities, use the full timezone converter.
AEST vs MST: the time difference through the year
The gap between AEST and MST changes during the year because they switch to and from daylight saving on different dates.
| Period | Difference |
|---|---|
| Oct 23, 2026 – Oct 31, 2026 | MST 17 h behind AEST |
| Nov 1, 2026 – Mar 13, 2027 | MST 18 h behind AEST |
| Mar 14, 2027 – Apr 3, 2027 | MST 17 h behind AEST |
| Apr 4, 2027 – Oct 2, 2027 | MST 16 h behind AEST |
| Oct 3, 2027 – Oct 23, 2027 | MST 17 h behind AEST |
Daylight-saving changes in the next year
| Zone | Date | Offset | Change |
|---|---|---|---|
| AEST | Apr 4, 2027 | UTC+11 → UTC+10 | Clocks go back 1 hour |
| AEST | Oct 3, 2027 | UTC+10 → UTC+11 | Clocks go forward 1 hour |
| MST | Nov 1, 2026 | UTC−6 → UTC−7 | Clocks go back 1 hour |
| MST | Mar 14, 2027 | UTC−7 → UTC−6 | Clocks go forward 1 hour |
| MST | Nov 7, 2027 | UTC−6 → UTC−7 | Clocks go back 1 hour |
AEST to MST conversion table
| AEST | MST (when 17 h behind) | MST (when 18 h behind) |
|---|---|---|
| 12:00 AM | 7:00 AM (previous day) | 6:00 AM (previous day) |
| 1:00 AM | 8:00 AM (previous day) | 7:00 AM (previous day) |
| 2:00 AM | 9:00 AM (previous day) | 8:00 AM (previous day) |
| 3:00 AM | 10:00 AM (previous day) | 9:00 AM (previous day) |
| 4:00 AM | 11:00 AM (previous day) | 10:00 AM (previous day) |
| 5:00 AM | 12:00 PM (previous day) | 11:00 AM (previous day) |
| 6:00 AM | 1:00 PM (previous day) | 12:00 PM (previous day) |
| 7:00 AM | 2:00 PM (previous day) | 1:00 PM (previous day) |
| 8:00 AM | 3:00 PM (previous day) | 2:00 PM (previous day) |
| 9:00 AM | 4:00 PM (previous day) | 3:00 PM (previous day) |
| 10:00 AM | 5:00 PM (previous day) | 4:00 PM (previous day) |
| 11:00 AM | 6:00 PM (previous day) | 5:00 PM (previous day) |
| 12:00 PM | 7:00 PM (previous day) | 6:00 PM (previous day) |
| 1:00 PM | 8:00 PM (previous day) | 7:00 PM (previous day) |
| 2:00 PM | 9:00 PM (previous day) | 8:00 PM (previous day) |
| 3:00 PM | 10:00 PM (previous day) | 9:00 PM (previous day) |
| 4:00 PM | 11:00 PM (previous day) | 10:00 PM (previous day) |
| 5:00 PM | 12:00 AM | 11:00 PM (previous day) |
| 6:00 PM | 1:00 AM | 12:00 AM |
| 7:00 PM | 2:00 AM | 1:00 AM |
| 8:00 PM | 3:00 AM | 2:00 AM |
| 9:00 PM | 4:00 AM | 3:00 AM |
| 10:00 PM | 5:00 AM | 4:00 AM |
| 11:00 PM | 6:00 AM | 5:00 AM |
Best time to meet
- 9 AM–5 PM overlap when MST is 17 h behind9:00 AM–10:00 AM AEST = 4:00 PM–5:00 PM MST (1 h)
- 9 AM–5 PM overlap when MST is 18 h behind9:00 AM–11:00 AM AEST = 3:00 PM–5:00 PM MST (2 h)
The two zones
Sydney is on AEST (UTC+10) from April to October and on daylight-saving AEDT (UTC+11) from the first Sunday in October to the first Sunday in April. Queensland (Brisbane) stays on AEST all year.
Mountain Time is UTC−7 in winter (MST) and UTC−6 in summer (MDT) for Denver, Salt Lake City and Calgary. Most of Arizona stays on MST (UTC−7) all year.