What is ACST in BRT?

Brasília Time is 13 hours 30 minutes behind

Australian Central Time is on UTC+10:30 and Brasília Time is on UTC−3:00 right now. Australian Central Time is on daylight saving, so its clocks read ACDT. The gap changes during the year — see below.

Convert a time

ACDT — Australian Central Time

BRT — Brasília Time

6:30 am

BRT, Fri

Time in Adelaide: 8:38:46 PM
Time in São Paulo: 7:08:46 AM
Difference: −13:30 h
Next clock change: April 4, 2027

When the difference changes

Australian Central Time and Brasília 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 – April 4, 2027Brasília Time is 13 hours 30 minutes behind
April 4, 2027 – October 3, 2027Brasília Time is 12 hours 30 minutes behind
October 3, 2027 – onwardsBrasília Time is 13 hours 30 minutes behind

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

Australian Central Time

Sunday, April 4, 2027

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

Brasília Time

No clock changes

Brasília Time stays on BRT all year, so its offset from UTC never moves.

ACST to BRT conversion table

Every hour of Friday, November 13, 2026, converted from Australian Central Time to Brasília Time. 14 of the 24 hours fall on a different calendar day in São Paulo, which is marked.

12:00 am ACDT: 10:30 am BRT−1 day
1:00 am ACDT: 11:30 am BRT−1 day
2:00 am ACDT: 12:30 pm BRT−1 day
3:00 am ACDT: 1:30 pm BRT−1 day
4:00 am ACDT: 2:30 pm BRT−1 day
5:00 am ACDT: 3:30 pm BRT−1 day
6:00 am ACDT: 4:30 pm BRT−1 day
7:00 am ACDT: 5:30 pm BRT−1 day
8:00 am ACDT: 6:30 pm BRT−1 day
9:00 am ACDT: 7:30 pm BRT−1 day
10:00 am ACDT: 8:30 pm BRT−1 day
11:00 am ACDT: 9:30 pm BRT−1 day

12:00 pm ACDT: 10:30 pm BRT−1 day
1:00 pm ACDT: 11:30 pm BRT−1 day
2:00 pm ACDT: 12:30 am BRT
3:00 pm ACDT: 1:30 am BRT
4:00 pm ACDT: 2:30 am BRT
5:00 pm ACDT: 3:30 am BRT
6:00 pm ACDT: 4:30 am BRT
7:00 pm ACDT: 5:30 am BRT
8:00 pm ACDT: 6:30 am BRT
9:00 pm ACDT: 7:30 am BRT
10:00 pm ACDT: 8:30 am BRT
11:00 pm ACDT: 9:30 am BRT

Scheduling between the two

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

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

Brasília Time (BRT) is used in Rio de Janeiro and Brasília. Brazil ended daylight saving in 2019.