Convert ACST to AKST
AKST is 18 hours 30 minutes behind ACST. ACST is UTC+9:30 and AKST is UTC−9.
Right now: ACST · AKST
Best time to schedule a meeting
Standard 9–5 working hours do not overlap at all between ACST and AKST. Someone has to take an early or late call — or use asynchronous communication instead.
| ACST | AKST | Suitable? |
|---|---|---|
| 9:00 AM | 2:30 PM (previous day) | outside 9–5 |
| 10:00 AM | 3:30 PM (previous day) | outside 9–5 |
| 11:00 AM | 4:30 PM (previous day) | outside 9–5 |
| 12:00 PM | 5:30 PM (previous day) | outside 9–5 |
| 1:00 PM | 6:30 PM (previous day) | outside 9–5 |
| 2:00 PM | 7:30 PM (previous day) | outside 9–5 |
| 3:00 PM | 8:30 PM (previous day) | outside 9–5 |
| 4:00 PM | 9:30 PM (previous day) | outside 9–5 |
| 5:00 PM | 10:30 PM (previous day) | outside 9–5 |
ACST to AKST conversion table
| ACST | AKST |
|---|---|
| 12:00 AM | 5:30 AM (previous day) |
| 1:00 AM | 6:30 AM (previous day) |
| 2:00 AM | 7:30 AM (previous day) |
| 3:00 AM | 8:30 AM (previous day) |
| 4:00 AM | 9:30 AM (previous day) |
| 5:00 AM | 10:30 AM (previous day) |
| 6:00 AM | 11:30 AM (previous day) |
| 7:00 AM | 12:30 PM (previous day) |
| 8:00 AM | 1:30 PM (previous day) |
| 9:00 AM | 2:30 PM (previous day) |
| 10:00 AM | 3:30 PM (previous day) |
| 11:00 AM | 4:30 PM (previous day) |
| 12:00 PM | 5:30 PM (previous day) |
| 1:00 PM | 6:30 PM (previous day) |
| 2:00 PM | 7:30 PM (previous day) |
| 3:00 PM | 8:30 PM (previous day) |
| 4:00 PM | 9:30 PM (previous day) |
| 5:00 PM | 10:30 PM (previous day) |
| 6:00 PM | 11:30 PM (previous day) |
| 7:00 PM | 12:30 AM |
| 8:00 PM | 1:30 AM |
| 9:00 PM | 2:30 AM |
| 10:00 PM | 3:30 AM |
| 11:00 PM | 4:30 AM |
About ACST
Australian Central Standard Time (ACST) is UTC+9:30. It is used in Adelaide and Darwin in winter.
Australian Central Standard Time is UTC+9:30, half an hour behind the eastern states rather than a whole hour, which surprises people every time. South Australia moves to daylight saving in October and the Northern Territory does not, so Adelaide and Darwin share this offset for half the year and are an hour apart for the other half.
About AKST
Alaska Standard Time (AKST) is UTC−9. It is used in Anchorage and the rest of Alaska in winter.
Alaska Standard Time is UTC−9, one hour behind Pacific Standard Time. Alaska observes daylight saving on the US schedule, moving to AKDT at UTC−8 in summer. The state is wide enough to span four time zones geographically and chooses to run on one for practical reasons, which is why the sun can rise at very different clock times at either end of it.
Does this gap change with the seasons?
Neither ACST nor AKST shifts with the seasons, so this 18.5-hour difference holds all year. That is unusual enough to be worth relying on: most cross-continental gaps move twice a year.
This is the reason scheduling systems store an IANA zone such as Region/City rather than an offset or an abbreviation: the zone knows its own rules and the offset does not.
Frequently asked questions
What time is 9:00 AM ACST in AKST?
9:00 AM ACST is 2:30 PM AKST (previous day).
Is AKST ahead of ACST?
AKST is 18 hours 30 minutes behind ACST.
Which time zone does this use?
ACST is UTC+9:30 and AKST is UTC−9. Both abbreviations denote a single fixed offset, so this conversion never shifts with daylight saving — what changes is which abbreviation a place is using at the time.