ACST to Argentina time conversion
Argentina is 12 hours 30 minutes behind ACST.
ACST is always UTC+9:30. Right now most places that use ACST are on ACDT (UTC+10:30): Argentina is 13 hours 30 minutes behind ACDT.
Time difference with your location
ACST is 9 hours 30 minutes ahead of UTC. Compare with your local time →
Choose a date and time
Choose the local time in ACST to convert it to Argentina on that date.
Skipped clock-change times are unavailable; a repeated time uses its first occurrence.
24-hour conversion chart · ACST → Argentina
This table converts each hour in ACST to Argentina on 2026-10-22.
- Working hours
- Outside working hours
- Night hours
| ACST | Argentina | Shared working hours |
|---|---|---|
| 00:0012:00 AM | 11:3011:30 AM -1 day | |
| 01:001:00 AM | 12:3012:30 PM -1 day | |
| 02:002:00 AM | 13:301:30 PM -1 day | |
| 03:003:00 AM | 14:302:30 PM -1 day | |
| 04:004:00 AM | 15:303:30 PM -1 day | |
| 05:005:00 AM | 16:304:30 PM -1 day | |
| 06:006:00 AM | 17:305:30 PM -1 day | |
| 07:007:00 AM | 18:306:30 PM -1 day | |
| 08:008:00 AM | 19:307:30 PM -1 day | |
| 09:009:00 AM | 20:308:30 PM -1 day | |
| 10:0010:00 AM | 21:309:30 PM -1 day | |
| 11:0011:00 AM | 22:3010:30 PM -1 day | |
| 12:0012:00 PM | 23:3011:30 PM -1 day | |
| 13:001:00 PM | 00:3012:30 AM | |
| 14:002:00 PM | 01:301:30 AM | |
| 15:003:00 PM | 02:302:30 AM | |
| 16:004:00 PM | 03:303:30 AM | |
| 17:005:00 PM | 04:304:30 AM | |
| 18:006:00 PM | 05:305:30 AM | |
| 19:007:00 PM | 06:306:30 AM | |
| 20:008:00 PM | 07:307:30 AM | |
| 21:009:00 PM | 08:308:30 AM | |
| 22:0010:00 PM | 09:309:30 AM | |
| 23:0011:00 PM | 10:3010:30 AM |
Quick conversion examples
These examples use ACST (UTC+9:30) and Argentina (UTC-3); choosing a date applies the local clock changes.
Conversion formula: Argentina = ACST − 12h30 · ACDT − 13h30.
| ACST | Argentina |
|---|---|
| 6:00 AM ACST | = 5:30 PM Argentina (-1 day) |
| 7:00 AM ACST | = 6:30 PM Argentina (-1 day) |
| 8:00 AM ACST | = 7:30 PM Argentina (-1 day) |
| 9:00 AM ACST | = 8:30 PM Argentina (-1 day) |
| 10:00 AM ACST | = 9:30 PM Argentina (-1 day) |
| 12:00 PM ACST | = 11:30 PM Argentina (-1 day) |
| 3:00 PM ACST | = 2:30 AM Argentina |
| 5:00 PM ACST | = 4:30 AM Argentina |
| 6:00 PM ACST | = 5:30 AM Argentina |
| 8:00 PM ACST | = 7:30 AM Argentina |
Overlapping meeting hours
The 08:00–18:00 working days in ACST and Argentina do not overlap on 2026-10-22.
Clock changes on both sides, 2026–2028
ACST and Argentina have the following local clock changes in 2026–2028; all times in the table are local to that side.
| Year | ACST | Argentina |
|---|---|---|
| 2026 | · 03:00 → 02:00 · 02:00 → 03:00 | No clock changes; UTC-3 all year. |
| 2027 | · 03:00 → 02:00 · 02:00 → 03:00 | No clock changes; UTC-3 all year. |
| 2028 | · 03:00 → 02:00 · 02:00 → 03:00 | No clock changes; UTC-3 all year. |
At the start of 2026, Argentina is 13 hours 30 minutes behind ACDT. The difference changes during the following periods.
- From 2026-04-05 02:00 ACST until 2026-10-04 03:00 ACDT, Argentina is 12 hours 30 minutes behind ACST.
- From 2027-04-04 02:00 ACST until 2027-10-03 03:00 ACDT, Argentina is 12 hours 30 minutes behind ACST.
- From 2028-04-02 02:00 ACST until 2028-10-01 03:00 ACDT, Argentina is 12 hours 30 minutes behind ACST.
Frequently asked questions
What time is 9 AM ACST in Argentina?
9:00 AM ACST = 8:30 PM Argentina (-1 day), using UTC+9:30 and UTC-3. Choose a date above for the seasonal local time.
Does the time difference between ACST and Argentina change during the year?
Yes. During 2026–2028: Argentina is 13 hours 30 minutes behind ACST; Argentina is 12 hours 30 minutes behind ACST. The clock-change table gives the dates for both sides.
How do I tell whether it is day or night in Argentina?
Read the Argentina clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.
What is the best time to call between ACST and Argentina?
The 08:00–18:00 working days in ACST and Argentina do not overlap.
What is the time difference between ACST and Argentina now?
Right now, Argentina is 12 hours 30 minutes behind ACST. Conversion formula: Argentina = ACST − 12h30 · ACDT − 13h30.