MDT to AEDT Converter & Meeting Planner
Quick answer: 9:00 AM MDT = 2:00 AM AEDT (fixed -06:00 standard offset — not DST-adjusted). Use the interactive converter below for DST-aware local-time scheduling.
Planning a call or meeting between Mountain Daylight Time (MDT) and Australian Eastern Daylight Time (AEDT)? You need to account for the standard time difference. Australian Eastern Daylight Time is normally 17 hours ahead of Mountain Daylight Time. Whether you are coordinating between teams in Denver and Salt Lake City and Sydney and Melbourne, 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 MDT = 5:00 PM AEDT. The full 24-hour MDT to AEDT table below uses fixed standard offsets for exact abbreviation searches.
Example: 3:00 PM MDT = 8:00 AM AEDT (+1 day).
| MDT Time | AEDT Time |
|---|---|
| 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) | 12:00 AM (00:00)+1 day |
| 8:00 AM (08:00) | 1:00 AM (01:00)+1 day |
| 9:00 AM (09:00) | 2:00 AM (02:00)+1 day |
| 10:00 AM (10:00) | 3:00 AM (03:00)+1 day |
| 11:00 AM (11:00) | 4:00 AM (04:00)+1 day |
| 12:00 PM (12:00) | 5:00 AM (05:00)+1 day |
| 1:00 PM (13:00) | 6:00 AM (06:00)+1 day |
| 2:00 PM (14:00) | 7:00 AM (07:00)+1 day |
| 3:00 PM (15:00) | 8:00 AM (08:00)+1 day |
| 4:00 PM (16:00) | 9:00 AM (09:00)+1 day |
| 5:00 PM (17:00) | 10:00 AM (10:00)+1 day |
| 6:00 PM (18:00) | 11:00 AM (11:00)+1 day |
| 7:00 PM (19:00) | 12:00 PM (12:00)+1 day |
| 8:00 PM (20:00) | 1:00 PM (13:00)+1 day |
| 9:00 PM (21:00) | 2:00 PM (14:00)+1 day |
| 10:00 PM (22:00) | 3:00 PM (15:00)+1 day |
| 11:00 PM (23:00) | 4:00 PM (16:00)+1 day |
Best time to call Sydney from Denver
For most work calls, compare the normal business day in Denver (MDT) with the business day in Sydney (AEDT). MDT commonly covers North America, while AEDT is mainly associated with Oceania, Eastern 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 5:00 PM MDT, which reaches 9:00 AM AEDT near the start of their workday.
- DST Safety: MDT or AEDT 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 MDT and AEDT?
During standard time, Australian Eastern Daylight Time is 17 hours ahead of Mountain Daylight Time.
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.
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.