What is ART in ACST?

Australian Central Time is 12 hours 30 minutes ahead

Argentina Time is on UTC−3:00 and Australian Central Time is on UTC+9:30 right now. The gap changes during the year — see below.

Time in Buenos Aires: 9:03:48 AM
Time in Adelaide: 9:33:48 PM
Difference: +12:30 h
Next clock change: October 4, 2026

Convert a time

ART — Argentina Time

ACST — Australian Central Time

9:30 pm

ACST, Fri

When the difference changes

Argentina Time and Australian Central Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:

Now – October 3, 2026Australian Central Time is 12 hours 30 minutes ahead
October 3, 2026 – April 3, 2027Australian Central Time is 13 hours 30 minutes ahead
April 3, 2027 – October 2, 2027Australian Central Time is 12 hours 30 minutes ahead
October 2, 2027 – onwardsAustralian Central Time is 13 hours 30 minutes ahead

Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.

Daylight saving

Argentina Time

No clock changes

Argentina Time stays on ART all year, so its offset from UTC never moves.

Australian Central Time

Sunday, October 4, 2026

Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ACDT after that.

ART to ACST conversion table

Every hour of Friday, September 25, 2026, converted from Argentina Time to Australian Central Time. 12 of the 24 hours fall on a different calendar day in Adelaide, which is marked.

12:00 am ART: 12:30 pm ACST
1:00 am ART: 1:30 pm ACST
2:00 am ART: 2:30 pm ACST
3:00 am ART: 3:30 pm ACST
4:00 am ART: 4:30 pm ACST
5:00 am ART: 5:30 pm ACST
6:00 am ART: 6:30 pm ACST
7:00 am ART: 7:30 pm ACST
8:00 am ART: 8:30 pm ACST
9:00 am ART: 9:30 pm ACST
10:00 am ART: 10:30 pm ACST
11:00 am ART: 11:30 pm ACST

12:00 pm ART: 12:30 am ACST+1 day
1:00 pm ART: 1:30 am ACST+1 day
2:00 pm ART: 2:30 am ACST+1 day
3:00 pm ART: 3:30 am ACST+1 day
4:00 pm ART: 4:30 am ACST+1 day
5:00 pm ART: 5:30 am ACST+1 day
6:00 pm ART: 6:30 am ACST+1 day
7:00 pm ART: 7:30 am ACST+1 day
8:00 pm ART: 8:30 am ACST+1 day
9:00 pm ART: 9:30 am ACST+1 day
10:00 pm ART: 10:30 am ACST+1 day
11:00 pm ART: 11:30 am ACST+1 day

Scheduling between the two

There is no overlap between a nine-to-six working day in Buenos Aires and one in Adelaide — the gap is too wide. A call has to sit early or late for one side. Early morning in Buenos Aires is the usual compromise, since that is late afternoon or evening in Adelaide.

Australian Central Time (ACST) is used in South Australia and the Northern Territory, on a half-hour offset from the east coast