Time Difference Between Mountain Time and Australia
As of 31 August 2026, Australia is 16 hours ahead of Mountain Time. That number is not constant. Over the course of a year, because of daylight saving changes, Sydney, Australia ranges from 16 hours ahead to 18 hours ahead relative to Mountain Time, United States. The calculator below is always up to date.
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Mountain Time, United States
16:34
Mon, Aug 31, 2026
UTC-6 · MDT · America/Denver
Sydney, Australia
+16h08:34
Tue, Sep 1, 2026
UTC+10 · Australia/Sydney
Australia is 16 hours ahead of Mountain Time.
When it is 16:34 in Mountain Time, it is already the next day in Australia.
Time zone details
| Place | Local date | Time zone | UTC offset | Summer time |
|---|---|---|---|---|
| Mountain Time | Monday, August 31, 2026 | MDTAmerica/Denver | UTC-6 | Active now |
| Australia | Tuesday, September 1, 2026 | Australia/Sydney | UTC+10 | Not active now |
Mountain Time: Covers Denver and most of the Rocky Mountain states. Switches between MST (UTC-7) and MDT (UTC-6) with daylight saving — unlike Arizona, which stays on MST year-round.
Australia: Australia has several time zones and only some states use daylight saving. This page uses Eastern Time (Sydney, Melbourne); Perth is 2 to 3 hours behind.
Hour by hour: Mountain Time to Australia
Every hour of today in Mountain Time and what it is in Australia. Highlighted rows fall inside Australia working hours (09:00–18:00).
| Mountain Time | Australia |
|---|---|
| 00:00 | 16:00 |
| 01:00 | 17:00 |
| 02:00 | 18:00 |
| 03:00 | 19:00 |
| 04:00 | 20:00 |
| 05:00 | 21:00 |
| 06:00 | 22:00 |
| 07:00 | 23:00 |
| 08:00 | 00:00next day |
| 09:00 | 01:00next day |
| 10:00 | 02:00next day |
| 11:00 | 03:00next day |
| Mountain Time | Australia |
|---|---|
| 12:00 | 04:00next day |
| 13:00 | 05:00next day |
| 14:00 | 06:00next day |
| 15:00 | 07:00next day |
| 16:00 | 08:00next day |
| 17:00 | 09:00next day |
| 18:00 | 10:00next day |
| 19:00 | 11:00next day |
| 20:00 | 12:00next day |
| 21:00 | 13:00next day |
| 22:00 | 14:00next day |
| 23:00 | 15:00next day |
Best time to call or meet
Overlapping working hours
17:00–18:00 in Mountain Time (09:00–10:00 in Australia)
Both places are inside 09:00–18:00 for 1 hour a day. Anything in this window works without asking anyone to stay late.
Reasonable calling hours
16:00–21:00 in Mountain Time (08:00–13:00 in Australia)
Both people are awake and available between 08:00 and 21:00 local time during this window.
When this difference changes
Australia puts its clocks forward on Sunday, October 4, 2026
The local offset moves from UTC+10 to UTC+11. After that date, Australia is 17 hours ahead of Mountain Time — instead of 16 hours ahead, as it is today.
Mountain Time puts its clocks back on Sunday, November 1, 2026
The local offset moves from UTC-6 to UTC-7. After that date, Australia is 18 hours ahead of Mountain Time — instead of 16 hours ahead, as it is today.
Planning something with more than two places?
Adding a third city usually kills the obvious answer. The Meeting Time Finder takes up to five cities at once and shows only the hours that work for everybody.
Mountain Time and Australia: common questions
What is the time difference between Mountain Time and Australia?
As of 31 August 2026, Australia is 16 hours ahead of Mountain Time. The gap is not fixed: across the year, Australia ranges from 16 hours ahead to 18 hours ahead relative to Mountain Time, as clocks change. The calculator on this page always shows the difference for right now.
When it is 9:00 AM in Mountain Time, what time is it in Australia?
It is 01:00 AM in Sydney, Australia. Use the time field in the calculator above to check any other hour.
Is Australia ahead of or behind Mountain Time?
Australia is ahead of Mountain Time by 16 hours at the moment. In practical terms, the working day in Australia starts and ends earlier in Mountain Time terms.
Do Mountain Time and Australia observe daylight saving time?
Both Mountain Time and Australia change their clocks, but not on the same dates. That is why the gap is not fixed: across the year, Australia ranges from 16 hours ahead to 18 hours ahead relative to Mountain Time.
What is the best time to call Australia from Mountain Time?
Working hours overlap between 17:00 and 18:00 Mountain Time time, which is 09:00 to 10:00 in Australia. Calls inside that window reach both sides during the normal working day.
Related comparisons
Local dates shown for Mountain Time, United States (UTC-6) and Sydney, Australia (UTC+10) were generated on Monday, August 31, 2026 UTC and refresh in your browser.