Convert SAST to ACST
ACST is 7 hours 30 minutes ahead of SAST. SAST is UTC+2 and ACST is UTC+9:30.
Right now: SAST · ACST
Best time to schedule a meeting
Standard 9–5 working hours overlap for 1 hour: 9:00 AM–10:00 AM SAST (4:00 PM–5:00 PM ACST). Schedule meetings inside that window.
| SAST | ACST | Suitable? |
|---|---|---|
| 9:00 AM | 4:30 PM | working hours |
| 10:00 AM | 5:30 PM | outside 9–5 |
| 11:00 AM | 6:30 PM | outside 9–5 |
| 12:00 PM | 7:30 PM | outside 9–5 |
| 1:00 PM | 8:30 PM | outside 9–5 |
| 2:00 PM | 9:30 PM | outside 9–5 |
| 3:00 PM | 10:30 PM | outside 9–5 |
| 4:00 PM | 11:30 PM | outside 9–5 |
| 5:00 PM | 12:30 AM (next day) | outside 9–5 |
SAST to ACST conversion table
| SAST | ACST |
|---|---|
| 12:00 AM | 7:30 AM |
| 1:00 AM | 8:30 AM |
| 2:00 AM | 9:30 AM |
| 3:00 AM | 10:30 AM |
| 4:00 AM | 11:30 AM |
| 5:00 AM | 12:30 PM |
| 6:00 AM | 1:30 PM |
| 7:00 AM | 2:30 PM |
| 8:00 AM | 3:30 PM |
| 9:00 AM | 4:30 PM |
| 10:00 AM | 5:30 PM |
| 11:00 AM | 6:30 PM |
| 12:00 PM | 7:30 PM |
| 1:00 PM | 8:30 PM |
| 2:00 PM | 9:30 PM |
| 3:00 PM | 10:30 PM |
| 4:00 PM | 11:30 PM |
| 5:00 PM | 12:30 AM (next day) |
| 6:00 PM | 1:30 AM (next day) |
| 7:00 PM | 2:30 AM (next day) |
| 8:00 PM | 3:30 AM (next day) |
| 9:00 PM | 4:30 AM (next day) |
| 10:00 PM | 5:30 AM (next day) |
| 11:00 PM | 6:30 AM (next day) |
About SAST
South Africa Standard Time (SAST) is UTC+2. It is used in South Africa, Lesotho and Eswatini.
South Africa Standard Time is UTC+2 with no daylight saving, unchanged since 1903 apart from two wartime years. The whole country keeps it, and so do Lesotho and Eswatini. Against the UK it is two hours ahead in winter and one in summer, which is the shift that catches London–Johannesburg standing calls every March and October.
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.
Does this gap change with the seasons?
Neither SAST nor ACST shifts with the seasons, so this 7.5-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 SAST in ACST?
9:00 AM SAST is 4:30 PM ACST.
Is ACST ahead of SAST?
ACST is 7 hours 30 minutes ahead of SAST.
Which time zone does this use?
SAST is UTC+2 and ACST is UTC+9:30. 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.