MDT to AEDT
+17hMDT
MDTSOURCEAEDT
AEDTGreen rows indicate typical business hours (9 AM - 5 PM)
MDT and AEDT on the World Map
The map below highlights the MDT (Mountain Daylight Time) and AEDT (Australian Eastern Daylight Time) timezone regions across the globe.
MDT – Mountain Daylight Time
UTC-06:00Mountain Daylight Time (MDT) is the daylight saving offset in the Mountain Time Zone, 6 hours behind UTC.
- •MDT shares the same offset as CST (UTC-06:00).
- •Arizona does not switch to MDT, remaining on MST.
AEDT – Australian Eastern Daylight Time
UTC+11:00Australian Eastern Daylight Time (AEDT, UTC+11:00) is the daylight saving period in south-eastern Australia, from October to April.
- •AEDT runs from the first Sunday in October to the first Sunday in April.
- •AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
- •Queensland does not observe daylight saving, so Brisbane stays on AEST.
- •During AEDT, Sydney is 16 hours ahead of New York and 11 hours ahead of UTC.
MDT to AEDT Time Difference – Complete Guide
MDT runs on Mountain Daylight Time (MDT) at UTC-06:00. AEDT runs on Australian Eastern Daylight Time (AEDT) at UTC+11:00. That puts MDT 17 hours ahead of AEDT — a difference of +17h at the current offsets.
In practice, when it is 9:00 AM in MDT it is 2:00 AM in AEDT on the next day. Midnight in MDT is 5:00 PM in AEDT. Neither zone observes daylight saving time, so the offset between them stays constant all year.
MDT to AEDT time conversion table
| MDT (MDT) | AEDT (AEDT) | Day |
|---|---|---|
| 12:00 AM | 5:00 PM | same day |
| 6:00 AM | 11:00 PM | same day |
| 7:00 AM | 12:00 AM | next day |
| 8:00 AM | 1:00 AM | next day |
| 9:00 AM | 2:00 AM | next day |
| 12:00 PM | 5:00 AM | next day |
| 3:00 PM | 8:00 AM | next day |
| 5:00 PM | 10:00 AM | next day |
| 6:00 PM | 11:00 AM | next day |
| 9:00 PM | 2:00 PM | next day |
Why people convert MDT to AEDT time
- Scheduling a call from MDT to AEDT: a 10:00 AM start in MDT lands at 3:00 AM in AEDT the next day, so you can confirm the slot without doing the arithmetic yourself.
- Handling a +17h gap: MDT and AEDT have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in AEDT is 2:00 AM in MDT.
- Booking travel or deliveries: tracking AEDT local time against MDT keeps pickup windows and arrival estimates honest across the +17h offset.
- Always state the zone abbreviation, not just the hour. "3:00 PM MDT" is unambiguous; "3 PM" across a +17h gap is not.
- With a +17h gap there is no shared 9-to-5 window, so alternate the early start: one week MDT takes the early slot, the next week AEDT does.
About MDT (Mountain Daylight Time)
Mountain Daylight Time (MDT) is observed during summer months in the Mountain Time Zone, except in Arizona which stays on MST year-round. MDT aligns with Central Standard Time (CST) at UTC-06:00.
About AEDT (Australian Eastern Daylight Time)
Australian Eastern Daylight Time (AEDT) is the daylight saving period in south-eastern Australia, one hour ahead of Australian Eastern Standard Time (AEST, UTC+10:00). Because Australia is in the southern hemisphere, AEDT runs through the summer — from the first Sunday in October to the first Sunday in April — which is almost exactly the reverse of the European and North American schedules. New South Wales, Victoria, Tasmania and the Australian Capital Territory observe it; Queensland and the Northern Territory do not, so Brisbane stays on AEST year round while Sydney moves to AEDT. During AEDT, Sydney is 11 hours ahead of UTC and 16 hours ahead of New York.
Best time to call between MDT and AEDT
With a +17h offset there is no overlap inside a normal 9 AM – 5 PM day. AEDT opens at 9:00 AM AEDT, which is 2:00 AM in MDT, so real-time calls need an early-morning or late-evening slot on one side.
Business hours overlap
MDT and AEDT have no shared working hours because of the +17h gap. Teams need to alternate early starts or rely on asynchronous handovers.
MDT is 17 hours ahead of AEDT (MDT UTC-06:00 → AEDT UTC+11:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.
🕐 Daylight Saving Time Info
MDT
☀ Currently in DST
Standard: UTC-07:00 · DST: UTC-06:00
Clocks fall back on Sun, Nov 1, 2026
AEDT
❄ Currently in Standard Time
Standard: UTC+10:00 · DST: UTC+11:00
Clocks spring forward on Sat, Oct 3, 2026
⚠ These locations are currently in different DST states, so the time difference may change when clocks adjust.
Learn More About Time
Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:
Frequently Asked Questions
What is the time difference between MDT and AEDT?
MDT (MDT, UTC-06:00) is 17 hours ahead of AEDT (AEDT, UTC+11:00). The gap is currently +17h.
How do I convert MDT time to AEDT time?
Add +17h to MDT local time. For example, 9:00 AM in MDT is 2:00 AM in AEDT (next day).
What time is it in AEDT right now?
AEDT uses AEDT at UTC+11:00. Use the live converter at the top of this page — it updates in real time and already accounts for the +17h offset from MDT.
What is the best time to call AEDT from MDT?
There is no shared working-hours window because of the +17h gap. The closest option is 1:00 PM in MDT, which is 6:00 AM in AEDT.
Which is ahead, MDT or AEDT?
MDT is 17 hours ahead of AEDT. When it is 12:00 PM in MDT it is 5:00 AM in AEDT.
Does daylight saving time affect the MDT–AEDT difference?
Neither zone observes daylight saving time, so the +17h offset between MDT and AEDT is fixed all year.
Which other cities share MDT's time zone?
MDT also covers Denver, Calgary, Edmonton, Salt Lake City, Boise.
Which countries use MDT, MDT's zone?
MDT is used in United States (Mountain), Canada (Alberta).
Is there a day difference between MDT and AEDT?
Sometimes. The +17h gap is large enough that 8:00 PM or later in MDT already falls on the next day in AEDT.
What is the time difference between MDT and AEDT?
AEDT is +17h from MDT.
What timezone is MDT in?
MDT operates on its local timezone.
What timezone is AEDT in?
AEDT operates on its local timezone.
Which countries use MDT (Mountain Daylight Time)?
MDT is used in United States (Mountain), Canada (Alberta).
Does MDT observe daylight saving time?
Yes, MDT switches to MST during summer months.
What are some interesting facts about MDT?
MDT shares the same offset as CST (UTC-06:00). Arizona does not switch to MDT, remaining on MST.
Which cities are in the AEDT timezone?
Major cities in the AEDT timezone include Sydney, Melbourne, Canberra, Hobart, Newcastle.
What is the UTC offset for AEDT?
Australian Eastern Daylight Time (AEDT) is at UTC+11:00. During daylight saving time, it shifts to AEDT.
What should I know about the AEDT timezone?
AEDT runs from the first Sunday in October to the first Sunday in April. AEDT is one hour ahead of Australian Eastern Standard Time (AEST).
When is it midnight in MDT, what time is it in AEDT?
When it is 12:00 AM (midnight) in MDT (MDT), it is +17h later in AEDT (AEDT).
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- new york to mdt
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- tokyo to mdt
- singapore to mdt
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- hong kong to mdt
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- kathmandu to mdt
See every conversion from MDT →·See every conversion from AEDT →