What is AST in AEST?
Australian Eastern Time is 15 hours ahead
Convert a time
AEDT — Australian Eastern Time
9:00 pm
AEDT, Fri
- Time in Halifax
- 6:00:45 AM
- Time in Sydney
- 9:00:45 PM
- Difference
- +15 h
- Next clock change
- March 14, 2027
When the difference changes
Atlantic Time and Australian Eastern Time do not change their clocks on the same dates, so the gap between them is not the same all year. Most converters show only today’s figure. These are the periods ahead:
- Now – March 14, 2027Australian Eastern Time is 15 hours ahead
- March 14, 2027 – April 3, 2027Australian Eastern Time is 14 hours ahead
- April 3, 2027 – October 2, 2027Australian Eastern Time is 13 hours ahead
- October 2, 2027 – November 7, 2027Australian Eastern Time is 14 hours ahead
- November 7, 2027 – onwardsAustralian Eastern Time is 15 hours ahead
Periods shorter than a day are not listed. Each zone changes at its own local time, so on a date when both move there are a few hours when the gap is briefly something else.
Daylight saving
Atlantic Time
Clocks go forward one hour — 2:00 am becomes 3:00 am local time, and the zone is on ADT after that.
Australian Eastern Time
Clocks go back one hour — 3:00 am becomes 2:00 am local time, and the zone is on AEST after that.
AST to AEST conversion table
Every hour of Friday, November 13, 2026, converted from Atlantic Time to Australian Eastern Time. 15 of the 24 hours fall on a different calendar day in Sydney, which is marked.
- 12:00 am AST
- 3:00 pm AEDT
- 1:00 am AST
- 4:00 pm AEDT
- 2:00 am AST
- 5:00 pm AEDT
- 3:00 am AST
- 6:00 pm AEDT
- 4:00 am AST
- 7:00 pm AEDT
- 5:00 am AST
- 8:00 pm AEDT
- 6:00 am AST
- 9:00 pm AEDT
- 7:00 am AST
- 10:00 pm AEDT
- 8:00 am AST
- 11:00 pm AEDT
- 9:00 am AST
- 12:00 am AEDT+1 day
- 10:00 am AST
- 1:00 am AEDT+1 day
- 11:00 am AST
- 2:00 am AEDT+1 day
- 12:00 pm AST
- 3:00 am AEDT+1 day
- 1:00 pm AST
- 4:00 am AEDT+1 day
- 2:00 pm AST
- 5:00 am AEDT+1 day
- 3:00 pm AST
- 6:00 am AEDT+1 day
- 4:00 pm AST
- 7:00 am AEDT+1 day
- 5:00 pm AST
- 8:00 am AEDT+1 day
- 6:00 pm AST
- 9:00 am AEDT+1 day
- 7:00 pm AST
- 10:00 am AEDT+1 day
- 8:00 pm AST
- 11:00 am AEDT+1 day
- 9:00 pm AST
- 12:00 pm AEDT+1 day
- 10:00 pm AST
- 1:00 pm AEDT+1 day
- 11:00 pm AST
- 2:00 pm AEDT+1 day
Scheduling between the two
There is no overlap between a nine-to-six working day in Halifax and one in Sydney — the gap is too wide. A call has to sit early or late for one side. Early morning in Halifax is the usual compromise, since that is late afternoon or evening in Sydney.
A note on AST: it can also mean Arabia Standard Time (UTC+3). This page means Atlantic Time.
Atlantic Time (AST) is used in Nova Scotia, New Brunswick and Puerto Rico
Australian Eastern Time (AEDT) is used in Melbourne, Canberra and Brisbane. Queensland stays on AEST all year while the southern states move to AEDT.
Other conversions
- AEST to AST
- AST to UTC
- AST to GMT
- AST to EST
- AST to CST
- AST to MST
- AST to PST
- AST to AKST
- AST to HST
- AST to BST
- AST to CET
- AST to IST
- AST to CST (China)
- AST to JST
- AST to Mexico City
- AST to BRT
- AST to ART
- AST to EET
- AST to WET
- AST to MSK
- AST to TRT
- AST to SAST
- AST to WAT
- AST to EAT
- AST to GST
- AST to PKT
- AST to ICT
- AST to WIB
- AST to SGT
- AST to HKT
- AST to KST
- AST to PHT
- AST to AWST
- AST to ACST
- AST to NZST
- All zones