Great Falls, MT, USA to ACST
ACST is NOT in use by many locations
ACDT (Australian Central Daylight Time) is used instead. Switch to ACDT time zone or select one of the cities Adelaide, Darwin, Adelaide Hills) for automatic timezone change.Time Difference
MST (Mountain Standard Time) is 16 hours and 30 minutes behind Australian Central Standard Time
6:30 pm18:30 in Great Falls, MT, USA is 11:00 am11:00 in ACST
Great Falls to ACST call time
Best time for a conference call or a meeting is between 4:30am-6:30am in Great Falls which corresponds to 9pm-11pm in ACST
6:30 pm18:30 MST (Mountain Standard Time) (Great Falls, MT, USA). Offset UTC -7:00 hours
11:00 am11:00 Australian Central Standard Time (ACST). Offset UTC +9:30 hours
6:30 pm18:30 Great Falls, MT, USA / 11:00 am11:00 ACST
| Great Falls, MT, USA | ACST |
|---|---|
| 12am (midnight) | 4:30 pm |
| 1am | 5:30 pm |
| 2am | 6:30 pm |
| 3am | 7:30 pm |
| 4am | 8:30 pm |
| 5am | 9:30 pm |
| 6am | 10:30 pm |
| 7am | 11:30 pm |
| 8am | 12:30 am |
| 9am | 1:30 am |
| 10am | 2:30 am |
| 11am | 3:30 am |
| 12pm (noon) | 4:30 am |
| 1pm | 5:30 am |
| 2pm | 6:30 am |
| 3pm | 7:30 am |
| 4pm | 8:30 am |
| 5pm | 9:30 am |
| 6pm | 10:30 am |
| 7pm | 11:30 am |
| 8pm | 12:30 pm |
| 9pm | 1:30 pm |
| 10pm | 2:30 pm |
| 11pm | 3:30 pm |
| 0:00 | 16:30 |
| 1:00 | 17:30 |
| 2:00 | 18:30 |
| 3:00 | 19:30 |
| 4:00 | 20:30 |
| 5:00 | 21:30 |
| 6:00 | 22:30 |
| 7:00 | 23:30 |
| 8:00 | 0:30 |
| 9:00 | 1:30 |
| 10:00 | 2:30 |
| 11:00 | 3:30 |
| 12:00 | 4:30 |
| 13:00 | 5:30 |
| 14:00 | 6:30 |
| 15:00 | 7:30 |
| 16:00 | 8:30 |
| 17:00 | 9:30 |
| 18:00 | 10:30 |
| 19:00 | 11:30 |
| 20:00 | 12:30 |
| 21:00 | 13:30 |
| 22:00 | 14:30 |
| 23:00 | 15:30 |
Great Falls Information
Time Zone
HAR - Heure Avancée des Rocheuses
-6:00 hours during Heure Avancée des Rocheuses.
Sunday, March 10, 2024 at 2:00 am local time. DST starts annually the on second Sunday of March. Clocks are turned forward 1 hour to Sunday, March 10, 2024, 3:00 am local daylight time instead. Also called Spring Forward or Summer Time.
Sunday, November 3, 2024 at 2:00 am local time. DST ends annually the on first Sunday of November. Clocks are turned backward 1 hour to Sunday, November 3, 2024, 1:00 am local standard time instead. Also called Fall Back or switch to Winter Time.
Great Falls Facts
Australian Central Standard Time
Offset: ACST is 9 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Australia
Countries: It is used in following countries: Australia
Principal Cities: The largest city in the ACST timezone is Adelaide from Australia with population about 1.225 million people. Other major cities in the area are Darwin, Adelaide Hills, Alice Springs, Palmerston
Daylight Saving: This is a standard time zone, however during summer some places switch clocks for one hour forward when daylight saving comes into effect and observe Australian Central Daylight Time (ACDT).
End: Australian Central Standard Time (ACST) has ended on Sunday, October 6, 2024 at 2:00 am local time and clocks were set one hour forward to Sunday, October 6, 2024, 3:00 am local daylight time instead. Standard time ends annually the on first Sunday of October.
Start: Australian Central Standard Time (ACST) starts on Sunday, April 6, 2025 at 3:00 am local time and clocks are set one hour back to Sunday, April 6, 2025, 2:00 am. Standard time starts annually the on first Sunday of April.
ACST representations, usage and related time zones
- +0930 - basic
- +09:30 - extended
- +0930 - sign character (+) followed by a four digit time providing hours (09) and minutes (30) of the offset. Indicates nine hour and thirty minutes time differences to the east of the zero meridian.
- Australia/Adelaide
- Australia/Broken_Hill
- Australia/Darwin
- Australia/North
- Australia/South
- Australia/Yancowinna