Australian Eastern Daylight Time → Mountain Daylight Time
AEDT = UTC+10MDT = UTC-6
AEDT (Sydney) ↔ MDT (Denver)
No overlap — one side will join outside working hours
AEDT (Sydney)
MDT (Denver)
00:00
08:00-1d
01:00
09:00-1dWorking
02:00
10:00-1dWorking
03:00
11:00-1dWorking
04:00
12:00-1dWorking
05:00
13:00-1dWorking
06:00
14:00-1dWorking
07:00
15:00-1dWorking
08:00
16:00-1dWorking
09:00Working
17:00-1doff
10:00Working
18:00-1doff
11:00Working
19:00-1doff
12:00Working
20:00-1doff
13:00Working
21:00-1doff
14:00Working
22:00-1doff
15:00Working
23:00-1doff
16:00Working
00:00off
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
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between aedt and mdt?
Australian Eastern Daylight Time (aedt) is UTC+10 and Mountain Daylight Time (mdt) is UTC-6. The difference between them is 16 hours.
Where is aedt used?
Australian Eastern Daylight Time (aedt) is used in Australia and surrounding regions. The IANA timezone identifier is Australia/Sydney.
Where is mdt used?
Mountain Daylight Time (mdt) is used in USA and surrounding regions. The IANA timezone identifier is America/Denver.
How do I convert aedt to mdt?
Use the interactive converter above. Drag the time slider to any aedt time and the mdt equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
AEDT (Sydney) to MDT (Denver) — exact time difference
AEDT (Sydney) is 16 hours ahead of MDT (Denver). At noon in AEDT (Sydney), your contact in MDT (Denver) sees 20:00.
AEDT (Sydney) runs on Australia/Sydney; MDT (Denver) runs on America/Denver. Together they are 16 hours apart.
Working hours overlap
There is no business hours overlap between AEDT (Sydney) and MDT (Denver) during standard working hours (9:00–17:00). Meetings would require one party to work outside normal hours.
Best call times between these locations
AEDT (Sydney) and MDT (Denver) have no shared working window. These slots minimize out-of-hours disruption for both sides.
08:00 Sydney / 16:00 Denver⚡ One side off-hours
⚠️ 1h before working hours in Sydney
09:00 Sydney / 17:00 Denver⚡ One side off-hours
⚠️ 1h after working hours in Denver
07:00 Sydney / 15:00 Denver⚡ One side off-hours
⚠️ 2h before working hours in Sydney
Working hours defined as 09:00–17:00 local time for each location.
Public holidays for both locations
⚡ Holiday alerts for both locations, double-check schedules before confirming.
AEDT (Sydney)7 holidays
Aug 3Picnic Day
Sep 28King's Birthday
Oct 5Labour Day
Oct 5King's Birthday
Nov 3Melbourne Cup
MDT (Denver)8 holidays
Jun 19Juneteenth National Independence DaySOON
Jul 3Independence Day
Sep 7Labour Day
Oct 12Columbus Day
Oct 12Indigenous Peoples' Day
Scheduling between AEDT (Sydney) and MDT (Denver)
Working across AEDT (Sydney) (Australia) and MDT (Denver) (USA) is a challenge — the 16-hour difference means no shared business hours window under a standard schedule. Flexibility from at least one side is required.
💡 Scheduling tips for these locations
⚡
A 08:00 meeting in AEDT (Sydney) means 16:00 in MDT (Denver) (1h before working hours in Sydney).
⚡
A 09:00 meeting in AEDT (Sydney) means 17:00 in MDT (Denver) (1h after working hours in Denver).
⚡
A 07:00 meeting in AEDT (Sydney) means 15:00 in MDT (Denver) (2h before working hours in Sydney).
With no shared business hours, these slots distribute the scheduling burden as evenly as possible between both locations.
Avoid scheduling mistakes — especially around daylight saving changes. Use the ClockinSync Chrome Extension to instantly verify and compare both time zones directly in your browser, without manual calculations.
Need a specific time? Use the slider or type directly into the input bar — it understands "3pm", "15:30", and location-specific formats like "9am AEDT (Sydney)".
