ACST/ACDT to MST/MDT time converter

MST/MDT is 16 hours 30 minutes behind ACST/ACDT. When it is 9:00 AM in ACST/ACDT, it is 4:30 PM (Fri, Oct 16) in MST/MDT.

ACST/ACDT ACDT

Saturday, October 17, 2026

MST/MDT MDT

Friday, October 16, 2026

ACST/ACDT
Australian Central Daylight Time
Sat, Oct 17
ACDTUTC+10:30
MST/MDT
Mountain Standard Time
Fri, Oct 16
MDTUTC-6-16h 30m
Finding your time zone…
Shared working hours (9:00–18:00)

ACST/ACDT to MST/MDT conversion table

Every hour of today in ACST/ACDT and the matching time in MST/MDT. Light rows are typical working hours (9:00–18:00).

ACST/ACDTMST/MDT
12:00 AM7:30 AM−1 day
1:00 AM8:30 AM−1 day
2:00 AM9:30 AM−1 day
3:00 AM10:30 AM−1 day
4:00 AM11:30 AM−1 day
5:00 AM12:30 PM−1 day
6:00 AM1:30 PM−1 day
7:00 AM2:30 PM−1 day
8:00 AM3:30 PM−1 day
9:00 AM4:30 PM−1 day
10:00 AM5:30 PM−1 day
11:00 AM6:30 PM−1 day
12:00 PM7:30 PM−1 day
1:00 PM8:30 PM−1 day
2:00 PM9:30 PM−1 day
3:00 PM10:30 PM−1 day
4:00 PM11:30 PM−1 day
5:00 PM12:30 AM
6:00 PM1:30 AM
7:00 PM2:30 AM
8:00 PM3:30 AM
9:00 PM4:30 AM
10:00 PM5:30 AM
11:00 PM6:30 AM

Best time to call or meet

Both sides are at work from 9:00 AM – 10:30 AM in ACST/ACDT (4:30 PM – 6:00 PM in MST/MDT).

Daylight saving time and the difference

The difference changes during the year because ACST/ACDT and MST/MDT switch clocks on different dates:

  • Oct 17, 2026 – Nov 1, 2026: -16h 30m
  • Nov 1, 2026 – Mar 14, 2027: -17h 30m
  • Mar 14, 2027 – Apr 4, 2027: -16h 30m
  • Apr 4, 2027 – Oct 3, 2027: -15h 30m
  • Oct 3, 2027 – Oct 17, 2027: -16h 30m

More conversions

MST to ACDTACDT to UTCACDT to GMTACDT to ESTACDT to CSTACDT to PSTACDT to CETACDT to MSKACDT to GSTACDT to PKTACDT to ISTACDT to SGTACDT to PHT
UTC to MSTGMT to MSTEST to MSTCST to MSTPST to MSTCET to MSTMSK to MSTGST to MSTPKT to MSTIST to MSTSGT to MSTPHT to MST

Questions and answers

What is the time difference between ACST/ACDT and MST/MDT?

MST/MDT is 16 hours 30 minutes behind ACST/ACDT.

What time is it in MST/MDT when it is 9 AM in ACST/ACDT?

When it is 9:00 AM in ACST/ACDT, it is 4:30 PM (Fri, Oct 16) in MST/MDT.

When is the best time to call MST/MDT from ACST/ACDT?

Both sides are at work from 9:00 AM – 10:30 AM in ACST/ACDT (4:30 PM – 6:00 PM in MST/MDT).

Does the time difference between ACST/ACDT and MST/MDT change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.