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AEST to MST converter
Australian Eastern Time
—
Mountain Time
—
Mountain Time is 16 hours behind Australian Eastern Time for most of the year, and 18 hours behind or 17 hours behind for part of it, because the two change their clocks on different dates.
When does the difference change?
In 2026:
- January 1 to March 7: Mountain Time is 18 hours behind Australian Eastern Time
- March 8 to April 4: Mountain Time is 17 hours behind Australian Eastern Time
- April 5 to October 3: Mountain Time is 16 hours behind Australian Eastern Time
- October 4 to October 31: Mountain Time is 17 hours behind Australian Eastern Time
- November 1 to December 31: Mountain Time is 18 hours behind Australian Eastern Time
Questions
What time is 9 AM AEST in MST?
For most of the year, 9 AM Australian Eastern Time is 5 PM the day before Mountain Time. For part of the year it is 3 PM the day before or 4 PM the day before, because of daylight saving time.
How many hours ahead or behind is MST from AEST?
Mountain Time is 16 hours behind Australian Eastern Time for most of the year, and 18 hours behind or 17 hours behind for part of it, because the two change their clocks on different dates.
Does the AEST to MST difference change?
Yes. It changes 4 times in 2026 because of daylight saving time.
About these time zones
AEST to MST, hour by hour
| Australian Eastern Time | Mountain Time |
|---|---|
| 12 AM | 7 AM (previous day) |
| 1 AM | 8 AM (previous day) |
| 2 AM | 9 AM (previous day) |
| 3 AM | 10 AM (previous day) |
| 4 AM | 11 AM (previous day) |
| 5 AM | 12 PM (previous day) |
| 6 AM | 1 PM (previous day) |
| 7 AM | 2 PM (previous day) |
| 8 AM | 3 PM (previous day) |
| 9 AM | 4 PM (previous day) |
| 10 AM | 5 PM (previous day) |
| 11 AM | 6 PM (previous day) |
| 12 PM | 7 PM (previous day) |
| 1 PM | 8 PM (previous day) |
| 2 PM | 9 PM (previous day) |
| 3 PM | 10 PM (previous day) |
| 4 PM | 11 PM (previous day) |
| 5 PM | 12 AM |
| 6 PM | 1 AM |
| 7 PM | 2 AM |
| 8 PM | 3 AM |
| 9 PM | 4 AM |
| 10 PM | 5 AM |
| 11 PM | 6 AM |
Based on the clocks on Monday, October 12, 2026. Use the converter above for another date.