AEDT to MDT Converter & Meeting Planner
Quick answer: 9:00 AM AEDT = 4:00 PM MDT (fixed +11:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Australian Eastern Daylight Time (AEDT) and Mountain Daylight Time (MDT)? You need to account for the standard time difference. Mountain Daylight Time is normally 17 hours behind Australian Eastern Daylight 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 AEDT = 7:00 AM MDT. The full 24-hour AEDT to MDT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM AEDT = 10:00 PM MDT (-1 day).
| AEDT Time | MDT Time |
|---|---|
| 12:00 AM (00:00) | 7:00 AM (07:00)-1 day |
| 1:00 AM (01:00) | 8:00 AM (08:00)-1 day |
| 2:00 AM (02:00) | 9:00 AM (09:00)-1 day |
| 3:00 AM (03:00) | 10:00 AM (10:00)-1 day |
| 4:00 AM (04:00) | 11:00 AM (11:00)-1 day |
| 5:00 AM (05:00) | 12:00 PM (12:00)-1 day |
| 6:00 AM (06:00) | 1:00 PM (13:00)-1 day |
| 7:00 AM (07:00) | 2:00 PM (14:00)-1 day |
| 8:00 AM (08:00) | 3:00 PM (15:00)-1 day |
| 9:00 AM (09:00) | 4:00 PM (16:00)-1 day |
| 10:00 AM (10:00) | 5:00 PM (17:00)-1 day |
| 11:00 AM (11:00) | 6:00 PM (18:00)-1 day |
| 12:00 PM (12:00) | 7:00 PM (19:00)-1 day |
| 1:00 PM (13:00) | 8:00 PM (20:00)-1 day |
| 2:00 PM (14:00) | 9:00 PM (21:00)-1 day |
| 3:00 PM (15:00) | 10:00 PM (22:00)-1 day |
| 4:00 PM (16:00) | 11:00 PM (23:00)-1 day |
| 5:00 PM (17:00) | 12:00 AM (00:00) |
| 6:00 PM (18:00) | 1:00 AM (01:00) |
| 7:00 PM (19:00) | 2:00 AM (02:00) |
| 8:00 PM (20:00) | 3:00 AM (03:00) |
| 9:00 PM (21:00) | 4:00 AM (04:00) |
| 10:00 PM (22:00) | 5:00 AM (05:00) |
| 11:00 PM (23:00) | 6:00 AM (06:00) |
Best time to call Denver from Sydney
For most work calls, compare the normal business day in Sydney (AEDT) with the business day in Denver (MDT). AEDT commonly covers Oceania, Eastern 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 AEDT, which reaches 9:00 AM MDT near the start of their workday.
- DST Safety: AEDT 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 AEDT and MDT?
During standard time, Mountain Daylight Time is 17 hours behind Australian Eastern Daylight Time.
When does AEDT start and end?
AEDT begins on the first Sunday in October at 02:00 local time, when clocks spring forward one hour from AEST (UTC+10) to AEDT (UTC+11). It ends on the first Sunday in April at 03:00 local time, when clocks fall back to AEST. In 2026, AEDT starts on October 4 and ends on April 5 — following the Southern Hemisphere summer calendar, which runs opposite to DST schedules in Europe and North America.
Is Brisbane on AEDT?
No — Queensland, including Brisbane, does not observe Daylight Saving Time and remains on AEST (UTC+10) year-round. During the AEDT period from October through April, Sydney and Melbourne advance to UTC+11 while Brisbane stays at UTC+10, creating a one-hour gap between cities that share nearly the same longitude and are otherwise in the same time zone for the other six months of the year.
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.