Offset
The time difference between Australian Central Time and Brasilia Time is 12.5 hours.
Australian Central Time (ACST) is ahead of Brasilia Time (BRT).
ACST: UTC+9:30
BRT: UTC-3
Neither Australian Central Time nor Brasilia Time is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Australian Central Time and Brasilia Time don't overlap on the same weekday. Brasilia Time is 12 hours behind Australian Central Time.
Realistic options: hand off asynchronously, or stretch one side by an hour to catch the other team at the start or end of their day.
This window may shift by an hour during daylight saving time.
Public holidays in 2026
National public holidays can affect availability — a counterpart is likely off work on their own holidays, so it's worth planning meetings and deadlines around them.
Australia
- New Year's DayThu, Jan 1
- Australia DayMon, Jan 26
- Good FridayFri, Apr 3
- Easter MondayMon, Apr 6
- Christmas DayFri, Dec 25
- St. Stephen's DayMon, Dec 28
Brazil
- New Year's DayThu, Jan 1
- CarnivalMon, Feb 16
- CarnivalTue, Feb 17
- Good FridayFri, Apr 3
- Easter SundaySun, Apr 5
- TiradentesTue, Apr 21
- Labour DayFri, May 1
- Corpus ChristiThu, Jun 4
- Independence DayMon, Sep 7
- Our Lady of AparecidaMon, Oct 12
- All Souls' DayMon, Nov 2
- Republic Proclamation DaySun, Nov 15
- Black Awareness DayFri, Nov 20
- Christmas DayFri, Dec 25
About these zones
Australian Central Time is also known as ACST, or ACDT. To call Australia, dial +61.
Brasilia Time is also known as BRT. To call Brazil, dial +55.
Brasilia Time is approximately 8,400 miles south of Australian Central Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| ACST | BRT | Day |
|---|---|---|
| 12:00 am | 11:30 am | -1 day |
| 1:00 am | 12:30 pm | -1 day |
| 2:00 am | 1:30 pm | -1 day |
| 3:00 am | 2:30 pm | -1 day |
| 4:00 am | 3:30 pm | -1 day |
| 5:00 am | 4:30 pm | -1 day |
| 6:00 am | 5:30 pm | -1 day |
| 7:00 am | 6:30 pm | -1 day |
| 8:00 am | 7:30 pm | -1 day |
| 9:00 am | 8:30 pm | -1 day |
| 10:00 am | 9:30 pm | -1 day |
| 11:00 am | 10:30 pm | -1 day |
| 12:00 pm | 11:30 pm | -1 day |
| 1:00 pm | 12:30 am | Same day |
| 2:00 pm | 1:30 am | Same day |
| 3:00 pm | 2:30 am | Same day |
| 4:00 pm | 3:30 am | Same day |
| 5:00 pm | 4:30 am | Same day |
| 6:00 pm | 5:30 am | Same day |
| 7:00 pm | 6:30 am | Same day |
| 8:00 pm | 7:30 am | Same day |
| 9:00 pm | 8:30 am | Same day |
| 10:00 pm | 9:30 am | Same day |
| 11:00 pm | 10:30 am | Same day |
Daylight saving time
Australian Central Time observes daylight saving time; Brasilia Time does not. The offset between the two zones changes when Australian Central Time transitions: on Sunday, October 4, 2026, clocks spring forward from ACST to ACDT.
See the daylight saving time page for transition dates across every time zone.
Daylight today
- Sunrise
- 7:18 AM
- Sunset
- 5:12 PM
- Day length
- 9h 55m
- Sunrise
- 6:44 AM
- Sunset
- 5:28 PM
- Day length
- 10h 45m
Cities in these zones
Cities in Australian Central Time
Cities in Brasilia Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Australian Central Time
- ADL
Airports in Brasilia Time
- CGH
- GRU
- GIG
- SDU
- CNF
- BSB
- CWB
- GYN
- POA
Related conversions
Common conversions
- What is 9:00 am ACST in BRT?
- 9:00 am ACST is 8:30 pm BRT, the previous day.
- What is 12:00 pm ACST in BRT?
- 12:00 pm ACST is 11:30 pm BRT, the previous day.
- What is 12:30 pm ACST in BRT?
- 12:30 pm ACST is 12:00 am BRT.
- What is 2:00 pm ACST in BRT?
- 2:00 pm ACST is 1:30 am BRT.
- What is 5:00 pm ACST in BRT?
- 5:00 pm ACST is 4:30 am BRT.
- What is 11:30 pm ACST in BRT?
- 11:30 pm ACST is 11:00 am BRT.