Convert ACST to ICT
ICT is 2 hours 30 minutes behind ACST. ACST is UTC+9:30 and ICT is UTC+7.
Right now: ACST · ICT
Best time to schedule a meeting
Standard 9–5 working hours overlap for 5 hours: 12:00 PM–5:00 PM ACST (9:00 AM–2:00 PM ICT). Schedule meetings inside that window.
| ACST | ICT | Suitable? |
|---|---|---|
| 9:00 AM | 6:30 AM | outside 9–5 |
| 10:00 AM | 7:30 AM | outside 9–5 |
| 11:00 AM | 8:30 AM | outside 9–5 |
| 12:00 PM | 9:30 AM | working hours |
| 1:00 PM | 10:30 AM | working hours |
| 2:00 PM | 11:30 AM | working hours |
| 3:00 PM | 12:30 PM | working hours |
| 4:00 PM | 1:30 PM | working hours |
| 5:00 PM | 2:30 PM | working hours |
ACST to ICT conversion table
| ACST | ICT |
|---|---|
| 12:00 AM | 9:30 PM (previous day) |
| 1:00 AM | 10:30 PM (previous day) |
| 2:00 AM | 11:30 PM (previous day) |
| 3:00 AM | 12:30 AM |
| 4:00 AM | 1:30 AM |
| 5:00 AM | 2:30 AM |
| 6:00 AM | 3:30 AM |
| 7:00 AM | 4:30 AM |
| 8:00 AM | 5:30 AM |
| 9:00 AM | 6:30 AM |
| 10:00 AM | 7:30 AM |
| 11:00 AM | 8:30 AM |
| 12:00 PM | 9:30 AM |
| 1:00 PM | 10:30 AM |
| 2:00 PM | 11:30 AM |
| 3:00 PM | 12:30 PM |
| 4:00 PM | 1:30 PM |
| 5:00 PM | 2:30 PM |
| 6:00 PM | 3:30 PM |
| 7:00 PM | 4:30 PM |
| 8:00 PM | 5:30 PM |
| 9:00 PM | 6:30 PM |
| 10:00 PM | 7:30 PM |
| 11:00 PM | 8:30 PM |
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 ICT
Indochina Time (ICT) is UTC+7. It is used in Bangkok, Hanoi, Ho Chi Minh City and Jakarta.
Indochina Time is UTC+7, covering Thailand, Vietnam, Cambodia and Laos, with no daylight saving in any of them. Bangkok and Hanoi keep the same clock, which makes the region unusually simple to schedule across — the complication is only ever with the countries around it, since Myanmar is at UTC+6:30 and Malaysia at UTC+8.
Does this gap change with the seasons?
Neither ACST nor ICT shifts with the seasons, so this 2.5-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 ICT?
9:00 AM ACST is 6:30 AM ICT.
Is ICT ahead of ACST?
ICT is 2 hours 30 minutes behind ACST.
Which time zone does this use?
ACST is UTC+9:30 and ICT is UTC+7. 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.