What is the difference between ACST and ACDT?
ACST is observed during the non-summer months, while ACDT is used during daylight saving time in the summer.
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ACST
Australian Central Standard Time
17 Nov 2025
Frequently Asked Questions
Does this area observe DST?
Yes, some areas switch to ACDT in the summer and return to ACST in the winter.
Which major cities follow ACST?
Cities like Adelaide, Darwin, and Alice Springs follow this schedule.
What areas share the same schedule?
Parts of Australia, including the territory of Christmas Island, follow the same.
How does this compare with Eastern or Western?
It is 30 minutes behind the Eastern Region and 1.5 hours ahead of the Western.
When does DST begin and end?
It starts on the first Sunday in October and ends on the first Sunday in April.
Why was DST introduced here?
It was introduced to make better use of daylight during the summer months and conserve energy.
How did this schedule get established?
The time standard was formalized in 1895 to help coordinate transportation and communications.
What are the typical work hours in this area?
Most businesses operate from 9:00 AM to 5:00 PM, with flexibility for remote work, especially in urban centers.
What is the economic importance of this area?
This area is known for its thriving wine industry, agricultural output, and vibrant tourism sector.