Offset
The time difference between Adelaide and Buenos Aires is 12.5 hours.
Adelaide (ACST) is ahead of Buenos Aires (ART).
ACST: UTC+9:30
ART: UTC-3
Neither Adelaide nor Buenos Aires is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Adelaide and Buenos Aires don't overlap on the same weekday. Buenos Aires 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
Argentina
- New Year's DayThu, Jan 1
- CarnivalMon, Feb 16
- CarnivalTue, Feb 17
- Day of Remembrance for Truth and JusticeTue, Mar 24
- Day of the Veterans and Fallen of the Malvinas WarThu, Apr 2
- Good FridayFri, Apr 3
- Labour DayFri, May 1
- May RevolutionMon, May 25
- Anniversary of the Passing of General Martín Miguel de GüemesMon, Jun 15
- General Manuel Belgrano Memorial DaySat, Jun 20
- Independence DayThu, Jul 9
- General José de San Martín Memorial DayMon, Aug 17
- Day of Respect for Cultural DiversityMon, Oct 12
- National Sovereignty DayMon, Nov 23
- Immaculate Conception DayTue, Dec 8
- Christmas DayFri, Dec 25
About these zones
Adelaide uses Australian Central Time (ACST, or ACDT). To call Australia, dial +61.
Buenos Aires uses Argentina Time (ART). To call Argentina, dial +54.
Buenos Aires is approximately 7,500 miles south of Adelaide.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| Adelaide | Buenos Aires | 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; Buenos Aires 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
- 7:56 AM
- Sunset
- 5:51 PM
- Day length
- 9h 55m
Airports in these zones
Airports in Australian Central Time
- ADL
Airports in Argentina Time
- AEP
- EZE
Related conversions
Common conversions
- What is 9:00 am Adelaide in Buenos Aires?
- 9:00 am Adelaide is 8:30 pm Buenos Aires, the previous day.
- What is 12:00 pm Adelaide in Buenos Aires?
- 12:00 pm Adelaide is 11:30 pm Buenos Aires, the previous day.
- What is 12:30 pm Adelaide in Buenos Aires?
- 12:30 pm Adelaide is 12:00 am Buenos Aires.
- What is 2:00 pm Adelaide in Buenos Aires?
- 2:00 pm Adelaide is 1:30 am Buenos Aires.
- What is 5:00 pm Adelaide in Buenos Aires?
- 5:00 pm Adelaide is 4:30 am Buenos Aires.
- What is 11:30 pm Adelaide in Buenos Aires?
- 11:30 pm Adelaide is 11:00 am Buenos Aires.