Convert Mountain Daylight Time to Australian Eastern Standard Time
Instantly convert Mountain Daylight Time (MDT) to Australian Eastern Standard Time (AEST) with our free online calculator.
Mountain Daylight Time
11:20:55 PM
Tue, Jun 23 (MDT)
Australian Eastern Standard Time
03:20:55 PM
Wed, Jun 24 (AEST)
Convert a Specific Time
24-Hour Comparison
| MDT | AEST |
|---|---|
| 12:00 AM | 4:00 PM |
| 1:00 AM | 5:00 PM |
| 2:00 AM | 6:00 PM |
| 3:00 AM | 7:00 PM |
| 4:00 AM | 8:00 PM |
| 5:00 AM | 9:00 PM |
| 6:00 AM | 10:00 PM |
| 7:00 AM | 11:00 PM |
| 8:00 AM | 12:00 AM(+1d) |
| 9:00 AM | 1:00 AM(+1d) |
| 10:00 AM | 2:00 AM(+1d) |
| 11:00 AM | 3:00 AM(+1d) |
| 12:00 PM | 4:00 AM(+1d) |
| 1:00 PM | 5:00 AM(+1d) |
| 2:00 PM | 6:00 AM(+1d) |
| 3:00 PM | 7:00 AM(+1d) |
| 4:00 PM | 8:00 AM(+1d) |
| 5:00 PM | 9:00 AM(+1d) |
| 6:00 PM | 10:00 AM(+1d) |
| 7:00 PM | 11:00 AM(+1d) |
| 8:00 PM | 12:00 PM(+1d) |
| 9:00 PM | 1:00 PM(+1d) |
| 10:00 PM | 2:00 PM(+1d) |
| 11:00 PM | 3:00 PM(+1d) |
How to Convert Mountain Daylight Time to Australian Eastern Standard Time
Formula
To convert Mountain Daylight Time (MDT) to Australian Eastern Standard Time (AEST): Convert MDT to AEST
About Mountain Daylight Time (MDT)
Mountain Daylight Time (MDT, IANA: America/Denver during DST window) is the summer-time variant of MST, set at UTC-6:00 — observed from the second Sunday in March to the first Sunday in November per the Energy Policy Act of 2005. MDT shares the same UTC offset as Central Standard Time (CST), which can cause cross-time-zone scheduling confusion during the DST transition windows in March and November. The Navajo Nation in northeastern Arizona does observe MDT (unlike the rest of Arizona), creating one of the rare US sub-state time-zone exceptions per the Navajo Nation Council's 1968 resolution. MDT applies in Colorado, Utah, Wyoming, Montana, Idaho east, New Mexico, parts of Texas, and Canadian Rocky Mountain provinces (Alberta, eastern BC). Used in coordination of: Denver International Airport flight operations, ski-area lift hours during shoulder-season DST window, Yellowstone National Park ranger schedules, US National Renewable Energy Lab operations, and FAA Albuquerque ARTCC ATC operations.
About Australian Eastern Standard Time (AEST)
Australian Eastern Standard Time (AEST, IANA: Australia/Sydney) is the civil time of Australia's most populous eastern states — New South Wales (NSW), Victoria (VIC), Queensland (QLD), Tasmania (TAS), Australian Capital Territory (ACT) — set at UTC+10:00. AEST is observed in winter; NSW + VIC + TAS + ACT switch to Australian Eastern Daylight Time (AEDT = UTC+11) from the first Sunday of October to the first Sunday of April. Queensland does NOT observe DST (stays on AEST year-round) — a state-level decision affirmed by referendums in 1992. AEST serves approximately 21 million Australians — about 80% of the country's population. AEST is identical in offset to Vladivostok Time (Russia), Papua New Guinea Time (PGT), Guam-Chamorro Time (CHST), and the US-territory Northern Mariana Islands. Major AEST cities: Sydney NSW (5.4M metro — largest Australian city + ASX home), Melbourne VIC (5.1M metro — 2nd-largest), Brisbane QLD (2.6M metro — 3rd-largest, on AEST year-round), Gold Coast QLD (725K — tourist coastline), Newcastle NSW (475K), Canberra ACT (450K — federal capital), Hobart TAS (250K — Tasmanian capital). Affects: ASX trading hours 10:00-16:00 AEST, Australian Cricket / AFL game scheduling, Great Barrier Reef + Sydney Opera House tourism operating hours.