Offset
The time difference between Australian Central Time and Colombia Time is 14.5 hours.
Australian Central Time (ACST) is ahead of Colombia Time (COT).
ACST: UTC+9:30
COT: UTC-5
Neither Australian Central Time nor Colombia Time is currently observing daylight saving time.
When to schedule
Standard business hours (9 AM–5 PM, Mon–Fri) in Australian Central Time and Colombia Time don't overlap on the same weekday. Colombia Time is 14 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
Colombia
- New Year's DayThu, Jan 1
- EpiphanyMon, Jan 12
- Saint Joseph's DayMon, Mar 23
- Maundy ThursdayThu, Apr 2
- Good FridayFri, Apr 3
- Labour DayFri, May 1
- Ascension DayMon, May 18
- Corpus ChristiMon, Jun 8
- Sacred HeartMon, Jun 15
- Saint Peter and Saint PaulMon, Jun 29
- Declaration of IndependenceMon, Jul 20
- Battle of BoyacáFri, Aug 7
- Assumption of MaryMon, Aug 17
- Columbus DayMon, Oct 12
- All Saints’ DayMon, Nov 2
- Independence of CartagenaMon, Nov 16
- Immaculate ConceptionTue, Dec 8
- Christmas DayFri, Dec 25
About these zones
Australian Central Time is also known as ACST, or ACDT. To call Australia, dial +61.
Colombia Time is also known as COT. To call Colombia, dial +57.
Colombia Time is approximately 9,500 miles southeast of Australian Central Time.
Quick reference
Full 24-hour conversion table — tap any time to open it in the converter.
| ACST | COT | Day |
|---|---|---|
| 12:00 am | 9:30 am | -1 day |
| 1:00 am | 10:30 am | -1 day |
| 2:00 am | 11:30 am | -1 day |
| 3:00 am | 12:30 pm | -1 day |
| 4:00 am | 1:30 pm | -1 day |
| 5:00 am | 2:30 pm | -1 day |
| 6:00 am | 3:30 pm | -1 day |
| 7:00 am | 4:30 pm | -1 day |
| 8:00 am | 5:30 pm | -1 day |
| 9:00 am | 6:30 pm | -1 day |
| 10:00 am | 7:30 pm | -1 day |
| 11:00 am | 8:30 pm | -1 day |
| 12:00 pm | 9:30 pm | -1 day |
| 1:00 pm | 10:30 pm | -1 day |
| 2:00 pm | 11:30 pm | -1 day |
| 3:00 pm | 12:30 am | Same day |
| 4:00 pm | 1:30 am | Same day |
| 5:00 pm | 2:30 am | Same day |
| 6:00 pm | 3:30 am | Same day |
| 7:00 pm | 4:30 am | Same day |
| 8:00 pm | 5:30 am | Same day |
| 9:00 pm | 6:30 am | Same day |
| 10:00 pm | 7:30 am | Same day |
| 11:00 pm | 8:30 am | Same day |
Daylight saving time
Australian Central Time observes daylight saving time; Colombia 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
- 5:44 AM
- Sunset
- 6:07 PM
- Day length
- 12h 23m
Daylight overlap: 1h 19m — 7:18 AM–8:37 AM in Australian Central Time (4:48 PM–6:07 PM in Colombia Time). Both locations are in daylight during this window.
Cities in these zones
Cities in Australian Central Time
Cities in Colombia Time
Browse all cities to see the current local time anywhere.
Airports in these zones
Airports in Australian Central Time
- ADL
Airports in Colombia Time
- BOG
- CLO
- EOH
- MDE
Related conversions
Common conversions
- What is 9:00 am ACST in COT?
- 9:00 am ACST is 6:30 pm COT, the previous day.
- What is 12:00 pm ACST in COT?
- 12:00 pm ACST is 9:30 pm COT, the previous day.
- What is 12:30 pm ACST in COT?
- 12:30 pm ACST is 10:00 pm COT, the previous day.
- What is 2:00 pm ACST in COT?
- 2:00 pm ACST is 11:30 pm COT, the previous day.
- What is 5:00 pm ACST in COT?
- 5:00 pm ACST is 2:30 am COT.
- What is 11:30 pm ACST in COT?
- 11:30 pm ACST is 9:00 am COT.