MST to AEDT time conversion
AEDT is 18 hours ahead of MST.
MST is always UTC-7. Right now most places that use MST are on MDT (UTC-6): AEDT is 17 hours ahead of MDT.
Time difference with your location
MST is 7 hours behind UTC. Compare with your local time →
Choose a date and time
Choose the local time in MST to convert it to AEDT on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · MST → AEDT
This table converts each hour in MST to AEDT on 2026-10-21.
- Working hours
- Outside working hours
- Night hours
| MST | AEDT | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 18:006:00 PM | |
| 01:001:00 AM | 19:007:00 PM | |
| 02:002:00 AM | 20:008:00 PM | |
| 03:003:00 AM | 21:009:00 PM | |
| 04:004:00 AM | 22:0010:00 PM | |
| 05:005:00 AM | 23:0011:00 PM | |
| 06:006:00 AM | 00:0012:00 AM +1 day | |
| 07:007:00 AM | 01:001:00 AM +1 day | |
| 08:008:00 AM | 02:002:00 AM +1 day | |
| 09:009:00 AM | 03:003:00 AM +1 day | |
| 10:0010:00 AM | 04:004:00 AM +1 day | |
| 11:0011:00 AM | 05:005:00 AM +1 day | |
| 12:0012:00 PM | 06:006:00 AM +1 day | |
| 13:001:00 PM | 07:007:00 AM +1 day | |
| 14:002:00 PM | 08:008:00 AM +1 day | ✓ |
| 15:003:00 PM | 09:009:00 AM +1 day | ✓ |
| 16:004:00 PM | 10:0010:00 AM +1 day | ✓ |
| 17:005:00 PM | 11:0011:00 AM +1 day | ✓ |
| 18:006:00 PM | 12:0012:00 PM +1 day | |
| 19:007:00 PM | 13:001:00 PM +1 day | |
| 20:008:00 PM | 14:002:00 PM +1 day | |
| 21:009:00 PM | 15:003:00 PM +1 day | |
| 22:0010:00 PM | 16:004:00 PM +1 day | |
| 23:0011:00 PM | 17:005:00 PM +1 day |
Quick conversion examples
These examples use MST (UTC-7) and AEDT (UTC+11); choosing a date applies the local clock changes.
Conversion formula: AEDT = MST + 18h · MDT + 17h · AEST = MDT + 16h.
| MST | AEDT |
|---|---|
| 6:00 AM MST | = 12:00 AM AEDT (+1 day) |
| 7:00 AM MST | = 1:00 AM AEDT (+1 day) |
| 8:00 AM MST | = 2:00 AM AEDT (+1 day) |
| 9:00 AM MST | = 3:00 AM AEDT (+1 day) |
| 10:00 AM MST | = 4:00 AM AEDT (+1 day) |
| 12:00 PM MST | = 6:00 AM AEDT (+1 day) |
| 3:00 PM MST | = 9:00 AM AEDT (+1 day) |
| 5:00 PM MST | = 11:00 AM AEDT (+1 day) |
| 6:00 PM MST | = 12:00 PM AEDT (+1 day) |
| 8:00 PM MST | = 2:00 PM AEDT (+1 day) |
Overlapping meeting hours
The 08:00–18:00 working day in MST and AEDT overlaps for 4 hours on 2026-10-21.
- Shared working hours
- 14:00–18:00 MST · 08:00–12:00 AEDT
Clock changes on both sides, 2026–2028
MST and AEDT have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | MST | AEDT |
|---|---|---|
| 2026 | · 02:00 → 03:00 · 02:00 → 01:00 | · 03:00 → 02:00 · 02:00 → 03:00 |
| 2027 | · 02:00 → 03:00 · 02:00 → 01:00 | · 03:00 → 02:00 · 02:00 → 03:00 |
| 2028 | · 02:00 → 03:00 · 02:00 → 01:00 | · 03:00 → 02:00 · 02:00 → 03:00 |
At the start of 2026, AEDT is 18 hours ahead of MST. The difference changes during the following periods.
- From 2026-03-08 03:00 MDT until 2026-04-04 10:00 MDT, AEDT is 17 hours ahead of MDT.
- From 2026-04-04 10:00 MDT until 2026-10-03 10:00 MDT, AEST is 16 hours ahead of MDT.
- From 2026-10-03 10:00 MDT until 2026-11-01 01:00 MST, AEDT is 17 hours ahead of MDT.
- From 2027-03-14 03:00 MDT until 2027-04-03 10:00 MDT, AEDT is 17 hours ahead of MDT.
- From 2027-04-03 10:00 MDT until 2027-10-02 10:00 MDT, AEST is 16 hours ahead of MDT.
- From 2027-10-02 10:00 MDT until 2027-11-07 01:00 MST, AEDT is 17 hours ahead of MDT.
- From 2028-03-12 03:00 MDT until 2028-04-01 10:00 MDT, AEDT is 17 hours ahead of MDT.
- From 2028-04-01 10:00 MDT until 2028-09-30 10:00 MDT, AEST is 16 hours ahead of MDT.
- From 2028-09-30 10:00 MDT until 2028-11-05 01:00 MST, AEDT is 17 hours ahead of MDT.
Frequently asked questions
What time is 9 AM MST in AEDT?
9:00 AM MST = 3:00 AM AEDT (+1 day), using UTC-7 and UTC+11. Choose a date above for the seasonal local time.
Does the time difference between MST and AEDT change during the year?
Yes. During 2026–2028: AEDT is 16 hours ahead of MST; AEDT is 17 hours ahead of MST; AEDT is 18 hours ahead of MST. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in AEDT?
Read the UTC+11 clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between MST and AEDT?
The shared 08:00–18:00 working window is 14:00–18:00 MST / 08:00–12:00 UTC+11, a total of 4 hours.
What is the time difference between MST and AEDT now?
Right now, UTC+11 is 18 hours ahead of MST. Conversion formula: AEDT = MST + 18h · MDT + 17h · AEST = MDT + 16h.