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MST to ACST Time Converter

ACST is 17 hours 30 minutes ahead of MST right now. 9:00 AM in MST is 2:30 AM in ACST (next day).

Time now: MST and ACST

🌐 Mountain Time (US & Canada)4:58 PMMonday, November 9 · UTC-07:00
🌐 Australian Central Time10:28 AMTuesday, November 10 · UTC+10:30

ACST is 17 hours 30 minutes ahead of MST right now. The gap is not fixed: it is 15 hours 30 minutes at some times of the year and 17 hours 30 minutes at others, because at least one of them changes its clocks for daylight saving time.

MST to ACST conversion table

Every hour of the day, using today's time difference.

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

Best time to meet between MST and ACST

Working hours overlap (9 AM – 6 PM in both places):

  • 4:00 PM – 6:00 PM MST = 9:30 AM – 11:30 AM ACST

The time difference changes during the year because of daylight saving time, so these windows shift by an hour at other times.

Does the time difference between MST and ACST change?

Yes. Right now ACST is 17 hours 30 minutes ahead of MST. These are the dates in the next 12 months when the gap changes:

  • Sunday, 14 March 2027: MST moves its clocks forward. ACST is 16 hours 30 minutes ahead of MST from then (it was 17 hours 30 minutes before).
  • Sunday, 4 April 2027: ACST moves its clocks back. ACST is 15 hours 30 minutes ahead of MST from then (it was 16 hours 30 minutes before).
  • Sunday, 3 October 2027: ACST moves its clocks forward. ACST is 16 hours 30 minutes ahead of MST from then (it was 15 hours 30 minutes before).
  • Sunday, 7 November 2027: MST moves its clocks back. ACST is 17 hours 30 minutes ahead of MST from then (it was 16 hours 30 minutes before).

Office hours in each other's time

  • 9 AM to 6 PM in MST is 2:30 AM (next day) to 11:30 AM (next day) in ACST.
  • 9 AM to 6 PM in ACST is 3:30 PM (previous day) to 12:30 AM in MST.

Based on today's clock settings.

Frequently asked questions

What is the time difference between MST and ACST?

ACST is 17 hours 30 minutes ahead of MST right now. The gap is not fixed: it is 15 hours 30 minutes at some times of the year and 17 hours 30 minutes at others, because at least one of them changes its clocks for daylight saving time.

How do I convert MST to ACST?

Add 17 hours 30 minutes to the MST time to get the ACST time (at today's difference). 9:00 AM in MST is 2:30 AM in ACST (next day). Or use the converter above and pick any date and time.

What is the current time in ACST?

It is 10:28 AM in ACST on Tuesday, November 10 (the converter above shows it live). At the same moment it is 4:58 PM in MST.

Does the time difference between MST and ACST change during the year?

Yes. Right now ACST is 17 hours 30 minutes ahead of MST. Over the next 12 months the gap changes 4 times: Sunday, 14 March 2027: MST moves its clocks forward. ACST is 16 hours 30 minutes ahead of MST from then (it was 17 hours 30 minutes before). Sunday, 4 April 2027: ACST moves its clocks back. ACST is 15 hours 30 minutes ahead of MST from then (it was 16 hours 30 minutes before). Sunday, 3 October 2027: ACST moves its clocks forward. ACST is 16 hours 30 minutes ahead of MST from then (it was 15 hours 30 minutes before). Sunday, 7 November 2027: MST moves its clocks back. ACST is 17 hours 30 minutes ahead of MST from then (it was 16 hours 30 minutes before).

What is the best time for a meeting between MST and ACST?

Between 9 AM and 6 PM in both places you can meet at 4:00 PM – 6:00 PM MST = 9:30 AM – 11:30 AM ACST. Check the overlap section on this page for every option.

What does MST mean?

Mountain Time is MST (UTC-07:00) in winter and MDT (UTC-06:00) in summer. Arizona stays on MST all year.

More conversions

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