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