AEST to MDT Converter & Meeting Planner
Quick answer: 9:00 AM AEST = 5:00 PM MDT (fixed +10:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Australian Eastern Standard Time (AEST) and Mountain Daylight Time (MDT)? You need to account for the standard time difference. Mountain Daylight Time is normally 16 hours behind Australian Eastern Standard Time. Whether you are coordinating between teams in Sydney and Melbourne and Denver and Salt Lake City, 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 AEST = 8:00 AM MDT. The full 24-hour AEST to MDT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM AEST = 11:00 PM MDT (-1 day).
| AEST Time | MDT Time |
|---|---|
| 12:00 AM (00:00) | 8:00 AM (08:00)-1 day |
| 1:00 AM (01:00) | 9:00 AM (09:00)-1 day |
| 2:00 AM (02:00) | 10:00 AM (10:00)-1 day |
| 3:00 AM (03:00) | 11:00 AM (11:00)-1 day |
| 4:00 AM (04:00) | 12:00 PM (12:00)-1 day |
| 5:00 AM (05:00) | 1:00 PM (13:00)-1 day |
| 6:00 AM (06:00) | 2:00 PM (14:00)-1 day |
| 7:00 AM (07:00) | 3:00 PM (15:00)-1 day |
| 8:00 AM (08:00) | 4:00 PM (16:00)-1 day |
| 9:00 AM (09:00) | 5:00 PM (17:00)-1 day |
| 10:00 AM (10:00) | 6:00 PM (18:00)-1 day |
| 11:00 AM (11:00) | 7:00 PM (19:00)-1 day |
| 12:00 PM (12:00) | 8:00 PM (20:00)-1 day |
| 1:00 PM (13:00) | 9:00 PM (21:00)-1 day |
| 2:00 PM (14:00) | 10:00 PM (22:00)-1 day |
| 3:00 PM (15:00) | 11:00 PM (23:00)-1 day |
| 4:00 PM (16:00) | 12:00 AM (00:00) |
| 5:00 PM (17:00) | 1:00 AM (01:00) |
| 6:00 PM (18:00) | 2:00 AM (02:00) |
| 7:00 PM (19:00) | 3:00 AM (03:00) |
| 8:00 PM (20:00) | 4:00 AM (04:00) |
| 9:00 PM (21:00) | 5:00 AM (05:00) |
| 10:00 PM (22:00) | 6:00 AM (06:00) |
| 11:00 PM (23:00) | 7:00 AM (07:00) |
Best time to call Denver from Sydney
For most work calls, compare the normal business day in Sydney (AEST) with the business day in Denver (MDT). AEST commonly covers Oceania, Australia, while MDT is mainly associated with North America.
⚠️ 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 1:00 AM AEST, which reaches 9:00 AM MDT near the start of their workday.
- DST Safety: AEST or MDT may shift during Daylight Saving Time. Always confirm the converted time for your specific date.
- Australian Securities Exchange (ASX): 10:00-16:00 local time in Sydney.
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Frequently Asked Questions
What is the time difference between AEST and MDT?
During standard time, Mountain Daylight Time is 16 hours behind Australian Eastern Standard Time.
Does all of eastern Australia observe Daylight Saving Time?
No — eastern Australia is split on DST. New South Wales (Sydney), Victoria (Melbourne), Tasmania (Hobart), and the ACT (Canberra) advance their clocks to AEDT (UTC+11) each October, while Queensland (Brisbane) opts out entirely and remains on AEST (UTC+10) year-round. This means Sydney and Brisbane run on the same clock for only part of the year.
What is the difference between AEST and AEDT?
AEST (Australian Eastern Standard Time) is the UTC+10:00 offset observed during the Southern Hemisphere winter months, roughly April through October. AEDT (Australian Eastern Daylight Time) is the UTC+11:00 offset applied during the Southern Hemisphere summer when clocks spring forward in October, observed by New South Wales, Victoria, Tasmania, and the ACT.
When does MDT start and end?
MDT begins on the second Sunday in March at 02:00 local MST time, when clocks spring forward one hour from MST (UTC-7) to MDT (UTC-6). It ends on the first Sunday in November at 02:00 local MDT time, when clocks fall back to MST. In 2026, MDT runs from March 8 through November 1, covering the majority of the calendar year.
Is Arizona on MDT?
Most of Arizona — including Phoenix and Tucson — does not observe Daylight Saving Time and remains on MST (UTC-7) year-round under a state law in effect since 1968, meaning Arizona does not advance to MDT each March. The significant exception is the Navajo Nation, a sovereign territory spanning parts of northeastern Arizona, southeastern Utah, and northwestern New Mexico, which does observe DST and shifts to MDT on the standard federal schedule.