What is ACST in BRT?
Brasília Time is 12 hours 30 minutes behind
Australian Central Time is on UTC+9:30 and Brasília Time is on UTC−3:00 right now. The gap changes during the year — see below.
- Time in Adelaide
- 10:22:43 PM
- Time in São Paulo
- 9:52:43 AM
- Difference
- −12:30 h
- Next clock change
- October 4, 2026
Convert a time
BRT — Brasília Time
9:30 am
BRT, Fri
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 – October 4, 2026Brasília Time is 12 hours 30 minutes behind
- October 4, 2026 – 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
Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ACDT after that.
Brasília Time
Brasília Time stays on BRT all year, so its offset from UTC never moves.
ACST to BRT conversion table
Every hour of Friday, September 25, 2026, converted from Australian Central Time to Brasília Time. 13 of the 24 hours fall on a different calendar day in São Paulo, which is marked.
- 12:00 am ACST
- 11:30 am BRT−1 day
- 1:00 am ACST
- 12:30 pm BRT−1 day
- 2:00 am ACST
- 1:30 pm BRT−1 day
- 3:00 am ACST
- 2:30 pm BRT−1 day
- 4:00 am ACST
- 3:30 pm BRT−1 day
- 5:00 am ACST
- 4:30 pm BRT−1 day
- 6:00 am ACST
- 5:30 pm BRT−1 day
- 7:00 am ACST
- 6:30 pm BRT−1 day
- 8:00 am ACST
- 7:30 pm BRT−1 day
- 9:00 am ACST
- 8:30 pm BRT−1 day
- 10:00 am ACST
- 9:30 pm BRT−1 day
- 11:00 am ACST
- 10:30 pm BRT−1 day
- 12:00 pm ACST
- 11:30 pm BRT−1 day
- 1:00 pm ACST
- 12:30 am BRT
- 2:00 pm ACST
- 1:30 am BRT
- 3:00 pm ACST
- 2:30 am BRT
- 4:00 pm ACST
- 3:30 am BRT
- 5:00 pm ACST
- 4:30 am BRT
- 6:00 pm ACST
- 5:30 am BRT
- 7:00 pm ACST
- 6:30 am BRT
- 8:00 pm ACST
- 7:30 am BRT
- 9:00 pm ACST
- 8:30 am BRT
- 10:00 pm ACST
- 9:30 am BRT
- 11:00 pm ACST
- 10:30 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 (ACST) 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.
Other conversions
- BRT to ACST
- ACST to UTC
- ACST to GMT
- ACST to EST
- ACST to CST
- ACST to MST
- ACST to PST
- ACST to AKST
- ACST to HST
- ACST to BST
- ACST to CET
- ACST to IST
- ACST to CST (China)
- ACST to JST
- ACST to AEST
- ACST to AST
- ACST to Mexico City
- ACST to ART
- ACST to EET
- ACST to WET
- ACST to MSK
- ACST to TRT
- ACST to SAST
- ACST to WAT
- ACST to EAT
- ACST to GST
- ACST to PKT
- ACST to ICT
- ACST to WIB
- ACST to SGT
- ACST to HKT
- ACST to KST
- ACST to PHT
- ACST to AWST
- ACST to NZST
- All zones