MST to AWST Converter & Meeting Planner
Quick answer: 9:00 AM MST = 12:00 AM AWST (fixed -07:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Mountain Standard Time (MST) and Australian Western Standard Time (AWST)? You need to account for the standard time difference. Australian Western Standard Time is normally 15 hours ahead of Mountain Standard Time. Whether you are coordinating between teams in Denver and Phoenix and Perth and Bunbury, our live tool has you covered. Use our interactive overlap studio below to find the perfect waking hours for both regions, taking into account any seasonal Daylight Saving Time (DST) changes.
24-Hour Conversion Table
Quick reference: 12:00 AM MST = 3:00 PM AWST. The full 24-hour MST to AWST table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM MST = 6:00 AM AWST (+1 day).
| MST Time | AWST Time |
|---|---|
| 12:00 AM (00:00) | 3:00 PM (15:00) |
| 1:00 AM (01:00) | 4:00 PM (16:00) |
| 2:00 AM (02:00) | 5:00 PM (17:00) |
| 3:00 AM (03:00) | 6:00 PM (18:00) |
| 4:00 AM (04:00) | 7:00 PM (19:00) |
| 5:00 AM (05:00) | 8:00 PM (20:00) |
| 6:00 AM (06:00) | 9:00 PM (21:00) |
| 7:00 AM (07:00) | 10:00 PM (22:00) |
| 8:00 AM (08:00) | 11:00 PM (23:00) |
| 9:00 AM (09:00) | 12:00 AM (00:00)+1 day |
| 10:00 AM (10:00) | 1:00 AM (01:00)+1 day |
| 11:00 AM (11:00) | 2:00 AM (02:00)+1 day |
| 12:00 PM (12:00) | 3:00 AM (03:00)+1 day |
| 1:00 PM (13:00) | 4:00 AM (04:00)+1 day |
| 2:00 PM (14:00) | 5:00 AM (05:00)+1 day |
| 3:00 PM (15:00) | 6:00 AM (06:00)+1 day |
| 4:00 PM (16:00) | 7:00 AM (07:00)+1 day |
| 5:00 PM (17:00) | 8:00 AM (08:00)+1 day |
| 6:00 PM (18:00) | 9:00 AM (09:00)+1 day |
| 7:00 PM (19:00) | 10:00 AM (10:00)+1 day |
| 8:00 PM (20:00) | 11:00 AM (11:00)+1 day |
| 9:00 PM (21:00) | 12:00 PM (12:00)+1 day |
| 10:00 PM (22:00) | 1:00 PM (13:00)+1 day |
| 11:00 PM (23:00) | 2:00 PM (14:00)+1 day |
Best time to call Perth from Denver
For most work calls, compare the normal business day in Denver (MST) with the business day in Perth (AWST). MST commonly covers North America, while AWST is mainly associated with Oceania, Australia.
⚠️ Note: 2026-07-05 is not a normal workday in one or both regions based on their configured calendar. The overlap below should be treated as a reference, not a guaranteed office-hours window.
⚠️ There is no clean same-day business-hours overlap on 2026-07-05. A practical compromise is around 6:30 PM MST, which reaches 8:30 AM AWST near the start of their workday.
- DST Safety: MST or AWST may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Australian Securities Exchange (ASX) - Local Perth Hours: 08:00-14:00 local time in Perth.
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Frequently Asked Questions
What is the time difference between MST and AWST?
During standard time, Australian Western Standard Time is 15 hours ahead of Mountain Standard Time.
Does Arizona observe Daylight Saving Time?
Most of Arizona — including Phoenix, Tucson, and the state government — does not observe Daylight Saving Time, remaining on MST (UTC-7) year-round under a state law in effect since 1968. The significant exception is the Navajo Nation, which spans parts of northeastern Arizona, Utah, and New Mexico and does observe DST, creating one of the most complex intrastate time zone situations in the United States.
What is the difference between MST and MDT?
MST (Mountain Standard Time) is the winter offset at UTC-7:00, observed from the first Sunday in November through the second Sunday in March. MDT (Mountain Daylight Time) is the summer offset at UTC-6:00, applied when most Mountain Time regions advance their clocks by one hour during Daylight Saving Time.
Does Perth observe Daylight Saving Time?
Perth and the rest of Western Australia do not observe Daylight Saving Time. Western Australians have voted against DST in multiple state referendums — most recently in 2009 — and AWST remains permanently fixed at UTC+08:00 throughout the year.
Are AWST and China Standard Time the same?
AWST and China Standard Time (CST) share the exact same UTC+08:00 offset, meaning Perth and Beijing operate on an identical clock. The same applies to Singapore Time (SGT) and Malaysia Time (MYT) — all three are perfectly synchronized with AWST, eliminating offset calculations entirely for the resource and commodity trade flows that connect Perth to these major Asian markets.