The short answer
Australian Eastern Time is 16 hours ahead of Mountain Daylight Time.
Australian Eastern Time☾
8:58:18pm
AEST · UTC+10:00 · Wed, Jul 22
Mountain Daylight Time☾
4:58:18am
MDT · UTC-06:00 · Wed, Jul 22
Read across to convert
Australian Eastern Time
AEST · UTC+10:00
Mountain Daylight Time
MDT · UTC-06:00
Click any row to pin that hour across both zones.
12amWed
8amTue ·−1d
1am
9amTue ·−1d
WORK2am
10amTue ·−1d
WORK3am
11amTue ·−1d
WORK4am
12pmTue ·−1d
WORK5am
1pmTue ·−1d
WORK6am
2pmTue ·−1d
WORK7am
3pmTue ·−1d
WORK8am
4pmTue ·−1d
WORK9am
WORK5pmTue ·−1d
10am
WORK6pmTue ·−1d
11am
WORK7pmTue ·−1d
12pm
WORK8pmTue ·−1d
1pm
WORK9pmTue ·−1d
2pm
WORK10pmTue ·−1d
3pm
WORK11pmTue ·−1d
4pm
WORK12amWed
5pm
1am
6pm
2am
7pm
3am
NOW
8pm
4am
9pm
5am
10pm
6am
11pm
7am
daylightnightworking hoursoverlap
Best time to meet=
Closest workable window
Just outside the working window — early on one side, late on the other.
Australian Eastern Time
7am–11am
Mountain Daylight Time
3pm–7pm
previous day
Popular conversions
Quick reference.
9amAustralian Eastern Time=5pmMountain Daylight Time · prev day
12pmAustralian Eastern Time=8pmMountain Daylight Time · prev day
3pmAustralian Eastern Time=11pmMountain Daylight Time · prev day
5pmAustralian Eastern Time=1amMountain Daylight Time
9pmAustralian Eastern Time=5amMountain Daylight Time
In context
What each side covers.
Australian Eastern Time
8:58pmAEST · UTC+10:00
Mountain Daylight Time
4:58amMDT · UTC-06:00
Cities on this clock
Related converters
Other popular pairs.
Pacific Time
3:58am
India Standard Time
4:28pm
Pacific Time to India12 hours 30 minutes behind
Eastern Daylight Time
6:58am
Central European Time
12:58pm
Eastern Time to Central Europe6 hours behind
India Standard Time
4:28pm
Eastern Daylight Time
6:58am
India to Eastern Time9 hours 30 minutes ahead
British Summer Time
11:58am
India Standard Time
4:28pm
London to India4 hours 30 minutes behind
Pacific Daylight Time
3:58am
Eastern Daylight Time
6:58am
Pacific to Eastern Time3 hours behind
Central European Time
12:58pm
India Standard Time
4:28pm
Central Europe to India3 hours 30 minutes behind
Frequently asked
Quick answers about converting between Australian Eastern Time and Mountain Daylight Time. Can't find what you need? Email [email protected].
- What is the time difference between Australian Eastern Time and Mountain Daylight Time?
- Australian Eastern Time is 16 hours ahead of Mountain Daylight Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.
- When it's 9am in Australian Eastern Time, what time is it in Mountain Daylight Time?
- 9am in Australian Eastern Time is 5pm in Mountain Daylight Time on the previous day. Use the hour-by-hour table above to read any other time across — find the row and read the matching cell in the other column.
- What's the best time for a call between Australian Eastern Time and Mountain Daylight Time?
- There's no comfortable 9-to-5 overlap between Australian Eastern Time and Mountain Daylight Time — they sit on opposite sides of the planet's working day. Plan for an early or late call on one side, or hand work off asynchronously.
- Does this account for daylight saving time?
- Yes. We track every clock change in both places, so the abbreviations you see — AEST and MDT — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.
- Why is the date sometimes different on each side?
- When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.