Convert BDT to ACST
ACST is 3 hours 30 minutes ahead of BDT. BDT is UTC+6 and ACST is UTC+9:30.
Right now: BDT · ACST
Best time to schedule a meeting
Standard 9–5 working hours overlap for 5 hours: 9:00 AM–2:00 PM BDT (12:00 PM–5:00 PM ACST). Schedule meetings inside that window.
| BDT | ACST | Suitable? |
|---|---|---|
| 9:00 AM | 12:30 PM | working hours |
| 10:00 AM | 1:30 PM | working hours |
| 11:00 AM | 2:30 PM | working hours |
| 12:00 PM | 3:30 PM | working hours |
| 1:00 PM | 4:30 PM | working hours |
| 2:00 PM | 5:30 PM | outside 9–5 |
| 3:00 PM | 6:30 PM | outside 9–5 |
| 4:00 PM | 7:30 PM | outside 9–5 |
| 5:00 PM | 8:30 PM | outside 9–5 |
BDT to ACST conversion table
| BDT | ACST |
|---|---|
| 12:00 AM | 3:30 AM |
| 1:00 AM | 4:30 AM |
| 2:00 AM | 5:30 AM |
| 3:00 AM | 6:30 AM |
| 4:00 AM | 7:30 AM |
| 5:00 AM | 8:30 AM |
| 6:00 AM | 9:30 AM |
| 7:00 AM | 10:30 AM |
| 8:00 AM | 11:30 AM |
| 9:00 AM | 12:30 PM |
| 10:00 AM | 1:30 PM |
| 11:00 AM | 2:30 PM |
| 12:00 PM | 3:30 PM |
| 1:00 PM | 4:30 PM |
| 2:00 PM | 5:30 PM |
| 3:00 PM | 6:30 PM |
| 4:00 PM | 7:30 PM |
| 5:00 PM | 8:30 PM |
| 6:00 PM | 9:30 PM |
| 7:00 PM | 10:30 PM |
| 8:00 PM | 11:30 PM |
| 9:00 PM | 12:30 AM (next day) |
| 10:00 PM | 1:30 AM (next day) |
| 11:00 PM | 2:30 AM (next day) |
About BDT
Bangladesh Standard Time (BDT) is UTC+6. It is used in Bangladesh, all year.
Bangladesh Standard Time is UTC+6 with no daylight saving. It is more often written BST, which is where the trouble starts: BST also means British Summer Time at UTC+1, and the two readings are five hours apart. Converter sites split on which they answer for and rarely say. BDT is the unambiguous way to write it, and worth using in anything that matters.
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 BDT nor ACST shifts with the seasons, so this 3.5-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 BDT in ACST?
9:00 AM BDT is 12:30 PM ACST.
Is ACST ahead of BDT?
ACST is 3 hours 30 minutes ahead of BDT.
Which time zone does this use?
BDT is UTC+6 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.