What is MST in AEST?
Australian Eastern Time is 16 hours ahead
Mountain Time is on UTC−6:00 and Australian Eastern Time is on UTC+10:00 right now. Mountain Time is on daylight saving, so its clocks read MDT. The gap changes during the year — see below.
- Time in Denver
- 8:56 pm
- Time in Sydney
- 12:56 pm
- Difference
- +16 h
- Next clock change
- October 3, 2026
Convert a time
AEST — Australian Eastern Time
12:00 pm
Wed, the next day
When the difference changes
Mountain Time and Australian Eastern Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:
- Now – October 3, 2026Australian Eastern Time is 16 hours ahead
- October 3, 2026 – November 1, 2026Australian Eastern Time is 17 hours ahead
- November 1, 2026 – March 14, 2027Australian Eastern Time is 18 hours ahead
- March 14, 2027 – April 3, 2027Australian Eastern Time is 17 hours ahead
- April 3, 2027 – October 2, 2027Australian Eastern Time is 16 hours ahead
- October 2, 2027 – onwardsAustralian Eastern Time is 17 hours ahead
Periods shorter than a day are not listed: both zones change at 2am in their own local time, so there are a few hours on each transition date when the gap is briefly something else.
Daylight saving
Mountain Time
Clocks go back one hour at 2am local time, becoming MST.
Australian Eastern Time
Clocks go forward one hour at 2am local time, becoming AEDT.
MST to AEST conversion table
Every hour of Tuesday, September 22, 2026, converted from Mountain Time to Australian Eastern Time. 16 of the 24 hours fall on a different calendar day in Sydney, which is marked.
- 12:00 am MDT
- 4:00 pm AEST
- 1:00 am MDT
- 5:00 pm AEST
- 2:00 am MDT
- 6:00 pm AEST
- 3:00 am MDT
- 7:00 pm AEST
- 4:00 am MDT
- 8:00 pm AEST
- 5:00 am MDT
- 9:00 pm AEST
- 6:00 am MDT
- 10:00 pm AEST
- 7:00 am MDT
- 11:00 pm AEST
- 8:00 am MDT
- 12:00 am AEST+1 day
- 9:00 am MDT
- 1:00 am AEST+1 day
- 10:00 am MDT
- 2:00 am AEST+1 day
- 11:00 am MDT
- 3:00 am AEST+1 day
- 12:00 pm MDT
- 4:00 am AEST+1 day
- 1:00 pm MDT
- 5:00 am AEST+1 day
- 2:00 pm MDT
- 6:00 am AEST+1 day
- 3:00 pm MDT
- 7:00 am AEST+1 day
- 4:00 pm MDT
- 8:00 am AEST+1 day
- 5:00 pm MDT
- 9:00 am AEST+1 day
- 6:00 pm MDT
- 10:00 am AEST+1 day
- 7:00 pm MDT
- 11:00 am AEST+1 day
- 8:00 pm MDT
- 12:00 pm AEST+1 day
- 9:00 pm MDT
- 1:00 pm AEST+1 day
- 10:00 pm MDT
- 2:00 pm AEST+1 day
- 11:00 pm MDT
- 3:00 pm AEST+1 day
Scheduling between the two
Working hours overlap from 5:00 pm to 6:00 pm MDT, which is 9:00 am to 10:00 am AEST. Anything inside that window falls in the normal working day at both ends.
Mountain Time (MDT) is used in Salt Lake City, Albuquerque and Calgary. Arizona keeps MST all year and does not follow MDT.
Australian Eastern Time (AEST) is used in Melbourne, Canberra and Brisbane. Queensland stays on AEST all year while the southern states move to AEDT.