Convert ICT to ACST
ACST is 2 hours 30 minutes ahead of ICT. ICT is UTC+7 and ACST is UTC+9:30.
Right now: ICT · ACST
Best time to schedule a meeting
Standard 9–5 working hours overlap for 6 hours: 9:00 AM–3:00 PM ICT (11:00 AM–5:00 PM ACST). Schedule meetings inside that window.
| ICT | ACST | Suitable? |
|---|---|---|
| 9:00 AM | 11:30 AM | working hours |
| 10:00 AM | 12:30 PM | working hours |
| 11:00 AM | 1:30 PM | working hours |
| 12:00 PM | 2:30 PM | working hours |
| 1:00 PM | 3:30 PM | working hours |
| 2:00 PM | 4:30 PM | working hours |
| 3:00 PM | 5:30 PM | outside 9–5 |
| 4:00 PM | 6:30 PM | outside 9–5 |
| 5:00 PM | 7:30 PM | outside 9–5 |
ICT to ACST conversion table
| ICT | ACST |
|---|---|
| 12:00 AM | 2:30 AM |
| 1:00 AM | 3:30 AM |
| 2:00 AM | 4:30 AM |
| 3:00 AM | 5:30 AM |
| 4:00 AM | 6:30 AM |
| 5:00 AM | 7:30 AM |
| 6:00 AM | 8:30 AM |
| 7:00 AM | 9:30 AM |
| 8:00 AM | 10:30 AM |
| 9:00 AM | 11:30 AM |
| 10:00 AM | 12:30 PM |
| 11:00 AM | 1:30 PM |
| 12:00 PM | 2:30 PM |
| 1:00 PM | 3:30 PM |
| 2:00 PM | 4:30 PM |
| 3:00 PM | 5:30 PM |
| 4:00 PM | 6:30 PM |
| 5:00 PM | 7:30 PM |
| 6:00 PM | 8:30 PM |
| 7:00 PM | 9:30 PM |
| 8:00 PM | 10:30 PM |
| 9:00 PM | 11:30 PM |
| 10:00 PM | 12:30 AM (next day) |
| 11:00 PM | 1:30 AM (next day) |
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.
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 ICT nor ACST 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 ICT in ACST?
9:00 AM ICT is 11:30 AM ACST.
Is ACST ahead of ICT?
ACST is 2 hours 30 minutes ahead of ICT.
Which time zone does this use?
ICT is UTC+7 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.