Offset
The time difference between Adelaide and Rio de Janeiro is 12.5 hours.
Adelaide (ACST) is ahead of Rio de Janeiro (BRT).
ACST: UTC+9:30
BRT: UTC-3
Neither Adelaide nor Rio de Janeiro is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Adelaide and Rio de Janeiro don't overlap on the same weekday. Rio de Janeiro is 12 hours behind Adelaide.
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
Adelaide uses Australian Central Time (ACST, or ACDT). To call Australia, dial +61.
Rio de Janeiro uses Brasilia Time (BRT). To call Brazil, dial +55.
Rio de Janeiro is approximately 8,450 miles south of Adelaide.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Adelaide | Rio de Janeiro | 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
Adelaide observes daylight saving time; Rio de Janeiro does not. The offset between the two zones changes when Adelaide 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
- 7:19 AM
- Sunset
- 5:12 PM
- Day length
- 9h 53m
- Sunrise
- 6:30 AM
- Sunset
- 5:16 PM
- Day length
- 10h 46m
Cities in these zones
Other 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 Adelaide in Rio de Janeiro?
- 9:00 am Adelaide is 8:30 pm Rio de Janeiro, the previous day.
- What is 12:00 pm Adelaide in Rio de Janeiro?
- 12:00 pm Adelaide is 11:30 pm Rio de Janeiro, the previous day.
- What is 12:30 pm Adelaide in Rio de Janeiro?
- 12:30 pm Adelaide is 12:00 am Rio de Janeiro.
- What is 2:00 pm Adelaide in Rio de Janeiro?
- 2:00 pm Adelaide is 1:30 am Rio de Janeiro.
- What is 5:00 pm Adelaide in Rio de Janeiro?
- 5:00 pm Adelaide is 4:30 am Rio de Janeiro.
- What is 11:30 pm Adelaide in Rio de Janeiro?
- 11:30 pm Adelaide is 11:00 am Rio de Janeiro.