Offset
The time difference between Rio de Janeiro and Adelaide is 12.5 hours.
Rio de Janeiro (BRT) is behind Adelaide (ACST).
BRT: UTC-3
ACST: UTC+9:30
Neither Rio de Janeiro nor Adelaide is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Rio de Janeiro and Adelaide don't overlap on the same weekday. Adelaide is 13 hours ahead of Rio de Janeiro.
With some flexibility, there are two workable windows outside standard hours, depending on which side takes the early or late slot:
- 7 AM–8 AM in Rio de Janeiro (7 PM–8 PM in Adelaide) — suggest 7:00 AM Rio de Janeiro (7:30 PM Adelaide).
- 7 PM–8 PM in Rio de Janeiro (7 AM–8 AM the next day in Adelaide) — suggest 7:00 PM Rio de Janeiro (7:30 AM Adelaide).
Either is an early start or late finish for one side, but workable for a one-off meeting.
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.
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
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
About these zones
Rio de Janeiro uses Brasilia Time (BRT). To call Brazil, dial +55.
Adelaide uses Australian Central Time (ACST, or ACDT). To call Australia, dial +61.
Adelaide is approximately 8,450 miles south of Rio de Janeiro.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Rio de Janeiro | Adelaide | Day |
|---|---|---|
| 12:00 am | 12:30 pm | Same day |
| 1:00 am | 1:30 pm | Same day |
| 2:00 am | 2:30 pm | Same day |
| 3:00 am | 3:30 pm | Same day |
| 4:00 am | 4:30 pm | Same day |
| 5:00 am | 5:30 pm | Same day |
| 6:00 am | 6:30 pm | Same day |
| 7:00 am | 7:30 pm | Same day |
| 8:00 am | 8:30 pm | Same day |
| 9:00 am | 9:30 pm | Same day |
| 10:00 am | 10:30 pm | Same day |
| 11:00 am | 11:30 pm | Same day |
| 12:00 pm | 12:30 am | +1 day |
| 1:00 pm | 1:30 am | +1 day |
| 2:00 pm | 2:30 am | +1 day |
| 3:00 pm | 3:30 am | +1 day |
| 4:00 pm | 4:30 am | +1 day |
| 5:00 pm | 5:30 am | +1 day |
| 6:00 pm | 6:30 am | +1 day |
| 7:00 pm | 7:30 am | +1 day |
| 8:00 pm | 8:30 am | +1 day |
| 9:00 pm | 9:30 am | +1 day |
| 10:00 pm | 10:30 am | +1 day |
| 11:00 pm | 11:30 am | +1 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
- 6:30 AM
- Sunset
- 5:16 PM
- Day length
- 10h 46m
- Sunrise
- 7:19 AM
- Sunset
- 5:12 PM
- Day length
- 9h 53m
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 Brasilia Time
- CGH
- GRU
- GIG
- SDU
- CNF
- BSB
- CWB
- GYN
- POA
Airports in Australian Central Time
- ADL
Related conversions
Common conversions
- What is 9:00 am Rio de Janeiro in Adelaide?
- 9:00 am Rio de Janeiro is 9:30 pm Adelaide.
- What is 12:00 pm Rio de Janeiro in Adelaide?
- 12:00 pm Rio de Janeiro is 12:30 am Adelaide, the next day.
- What is 12:30 pm Rio de Janeiro in Adelaide?
- 12:30 pm Rio de Janeiro is 1:00 am Adelaide, the next day.
- What is 2:00 pm Rio de Janeiro in Adelaide?
- 2:00 pm Rio de Janeiro is 2:30 am Adelaide, the next day.
- What is 5:00 pm Rio de Janeiro in Adelaide?
- 5:00 pm Rio de Janeiro is 5:30 am Adelaide, the next day.
- What is 11:30 pm Rio de Janeiro in Adelaide?
- 11:30 pm Rio de Janeiro is 12:00 pm Adelaide, the next day.