What is 8 AM MST in AEDT?
8 AM MST = 1:00 AM AEDT (01:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
Timezone converter
MST to AEDT currently uses Mountain Time in America/Phoenix and Australian Eastern Time in Australia/Sydney as the live reference pair, with a +17h live gap. MST to AEDT matters whenever Phoenix and Sydney need to coordinate across a +17h gap. The MST side covers United States and Mexico, while AEDT covers Australia — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.
Last updated Apr 26, 2026. Offset math, DST behavior, and city coverage on both sides are refreshed from the live timezone dataset during the page revalidation window.
From
Mountain Time
America/Phoenix · MST -07:00
Major markets in this grouping include Phoenix, Ciudad Juárez, Calgary, Edmonton.
To
Australian Eastern Time
Australia/Sydney · GMT+10 +10:00
Major markets in this grouping include Sydney, Brisbane, Gold Coast, Newcastle.
Current gap
+17h
MST -07:00 vs AEDT +10:00
9-to-5 overlap
1h
MST 4:00 PM previous day to 5:00 PM previous day
Representative countries
United States, Mexico, and Canada / Australia
Based on the busiest city and zone usage found in the current dataset.
MST (Phoenix, -07:00) to AEDT (Sydney, +10:00) is currently a +17h conversion. Live coverage on the MST side is anchored by Phoenix, Ciudad Juárez, Calgary, and Edmonton; the AEDT side draws from Sydney, Brisbane, Gold Coast, and Newcastle.
MST to AEDT matters whenever Phoenix and Sydney need to coordinate across a +17h gap. The MST side covers United States and Mexico, while AEDT covers Australia — that country mix is the practical reason this conversion shows up in calendars rather than the abstract offset math.
The pair spans roughly half the globe with a +17h gap, so the overlap window is narrow and most coordination happens through scheduled handoffs rather than live meetings.
AEDT follows seasonal clock changes through Australia/Sydney, while MST stays on a fixed offset year-round. The result is a gap that quietly shifts by an hour twice a year — short by an hour in winter (or summer, depending on hemisphere) and back to normal afterwards.
MST and AEDT sit exactly 17h apart, leaving roughly 1h of usable 9-to-5 overlap. That window is tight enough that recurring meetings tend to pile onto the same hour, which is why teams with this pair often consolidate cross-region work into a single anchor meeting per day.
MST coverage on this page is led by Phoenix, United States, Ciudad Juárez, Mexico, Calgary, Canada, and Edmonton, Canada, with 2 more in the live dataset. That mix is what makes MST feel anchored to West Coast and Pacific-edge American activity in practice rather than just an abbreviation on a chart.
AEDT coverage is led by Sydney, Australia, Brisbane, Australia, Gold Coast, Australia, and Newcastle, Australia, with 2 more anchoring the wider label family. Combined with the MST side, this conversion ends up describing trans-Pacific outsourcing handoffs, gaming and entertainment release windows, and follow-the-sun engineering rotations.
Adjust the time — digits roll like an odometer. Swap button flips the zones.
Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.
| MST | AEDT | Day relation |
|---|---|---|
| 9:00 AM | 2:00 AMMon, Apr 27 | next day |
| 12:00 PM | 5:00 AMMon, Apr 27 | next day |
| 3:00 PM | 8:00 AMMon, Apr 27 | next day |
| 6:00 PM | 11:00 AMMon, Apr 27 | next day |
| 9:00 PM | 2:00 PMMon, Apr 27 | next day |
Quick conversions for 9 AM, noon, 3 PM, 6 PM, and 9 PM based on today's local calendar.
| AEDT | MST | Day relation |
|---|---|---|
| 9:00 AM | 4:00 PMSun, Apr 26 | previous day |
| 12:00 PM | 7:00 PMSun, Apr 26 | previous day |
| 3:00 PM | 10:00 PMSun, Apr 26 | previous day |
| 6:00 PM | 1:00 AMMon, Apr 27 | same day |
| 9:00 PM | 4:00 AMMon, Apr 27 | same day |
MST to AEDT ranges from MST 9:00 AM (which lands at AEDT 2:00 AM) through MST 9:00 PM (AEDT 2:00 PM). Most of those slots fall on a different calendar day on the AEDT side, which is why this direction always needs explicit dates in invites and ticket comments — the time alone is not enough.
AEDT to MST ranges from AEDT 9:00 AM (which lands at MST 4:00 PM) through AEDT 9:00 PM (MST 4:00 AM). Most of those slots fall on a different calendar day on the MST side, which is why this direction always needs explicit dates in invites and ticket comments — the time alone is not enough.
These direct answers are here for the exact-intent searches people actually use, like “10 AM MST to AEDT” or “4 PM MST in AEDT”.
8 AM MST = 1:00 AM AEDT (01:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
9 AM MST = 2:00 AM AEDT (02:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
10 AM MST = 3:00 AM AEDT (03:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
11 AM MST = 4:00 AM AEDT (04:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
12 PM MST = 5:00 AM AEDT (05:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
1 PM MST = 6:00 AM AEDT (06:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
2 PM MST = 7:00 AM AEDT (07:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
3 PM MST = 8:00 AM AEDT (08:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
4 PM MST = 9:00 AM AEDT (09:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
5 PM MST = 10:00 AM AEDT (10:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
6 PM MST = 11:00 AM AEDT (11:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
9 PM MST = 2:00 PM AEDT (14:00). On today's live calendar that lands on Mon, Apr 27 in AEDT, which means the answer is a next day conversion rather than a static offset lookup.
The live gap is +17h right now, based on America/Phoenix at -07:00 and Australia/Sydney at +10:00. Australia/Sydney changes offset on October 4, 2026, so the gap moves to +18h after that transition.
The most usable workday block right now is about 1 hours: MST 4:00 PM previous day to 5:00 PM previous day, which lines up with AEDT 9:00 AM to 10:00 AM.
America/Phoenix
MST · -07:00
Australia/Sydney
GMT+10 · +10:00
These are the busiest live references selected from the abbreviation families on this page.
| MST | AEDT |
|---|---|
| 17:00 | 10:00 |
| 18:00 | 11:00 |
| 19:00 | 12:00 |
| 20:00 | 13:00 |
| 21:00 | 14:00 |
| 22:00 | 15:00 |
| 23:00 | 16:00 |
| 00:00 | 17:00 |
| 01:00 | 18:00 |
| 02:00 | 19:00 |
| 03:00 | 20:00 |
| 04:00 | 21:00 |
| 05:00 | 22:00 |
| 06:00 | 23:00 |
| 07:00 | 00:00 |
| 08:00 | 01:00 |
| 09:00 | 02:00 |
| 10:00 | 03:00 |
| 11:00 | 04:00 |
| 12:00 | 05:00 |
| 13:00 | 06:00 |
| 14:00 | 07:00 |
| 15:00 | 08:00 |
| 16:00 | 09:00 |
Countries represented here include United States, Mexico, and Canada.
Countries represented here include Australia.
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