What is the time difference between AEST and MST?

AEST is 17 hours behind MST. AEST is UTC+10 and MST is UTC-7.

What is 9 AM AEST in MST?

9 AM AEST is 4 PM MST (previous day).

What is 12 PM AEST in MST?

12 PM AEST (noon) is 7 PM MST (previous day).

AEST to MST Time Converter

Q: What are the best meeting times between AEST and MST?

There is no standard business hours overlap between AEST and MST.

Australian Eastern Standard Time → Mountain Standard Time

AEST

UTC+10

Australian Eastern Standard Time

offset

-17h

MST is 17h behind

MST

UTC-7

Mountain Standard Time

Both AEST and MST observe DST — offset may shift ±1h during transitions

Australian Eastern Standard Time (AEST) is 17 hours behind Mountain Standard Time (MST). When it is noon in AEST, it is 7 PM in MST. This offset may change during Daylight Saving Time transitions.

Meeting planner tool Reverse: MST to AEST

Cities in AEST

🇦🇺Sydney 🇦🇺Melbourne 🇦🇺Brisbane

Cities in MST

🇺🇸Phoenix 🇺🇸Denver 🇨🇦Calgary

All 24 Hours — AEST to MST

Click any row to see the full detail page. Current hour in AEST is highlighted.

Both business hoursPartial overlap

12 AM6 AM12 PM6 PM11 PM

Best Meeting Times — AEST & MST

No standard business-hours overlap between AEST and MST. Consider early morning or evening calls.

Challenging overlap

AEST and MST are 17 hours apart with no shared business-hours window. Try scheduling at 8 AM in the earlier timezone or 6 PM in the later one.

8 AM→3 PM−1d 9 AM→4 PM−1d 10 AM→5 PM−1d 11 AM→6 PM−1d 12 PM→7 PM−1d 1 PM→8 PM−1d 2 PM→9 PM−1d 3 PM→10 PM−1d 4 PM→11 PM−1d 5 PM→12 AM

Related Time Zone Conversions

Frequently Asked Questions — AEST to MST

Australian Eastern Standard Time (AEST) is 17 hours behind Mountain Standard Time (MST). AEST is UTC+10 and MST is UTC-7. This offset may shift by ±1 hour during Daylight Saving Time transitions.