Convert BDT to HST
HST is 16 hours behind BDT. BDT is UTC+6 and HST is UTC−10.
Right now: BDT · HST
Best time to schedule a meeting
Standard 9–5 working hours do not overlap at all between BDT and HST. Someone has to take an early or late call — or use asynchronous communication instead.
| BDT | HST | Suitable? |
|---|---|---|
| 9:00 AM | 5:00 PM (previous day) | outside 9–5 |
| 10:00 AM | 6:00 PM (previous day) | outside 9–5 |
| 11:00 AM | 7:00 PM (previous day) | outside 9–5 |
| 12:00 PM | 8:00 PM (previous day) | outside 9–5 |
| 1:00 PM | 9:00 PM (previous day) | outside 9–5 |
| 2:00 PM | 10:00 PM (previous day) | outside 9–5 |
| 3:00 PM | 11:00 PM (previous day) | outside 9–5 |
| 4:00 PM | 12:00 AM | outside 9–5 |
| 5:00 PM | 1:00 AM | outside 9–5 |
BDT to HST conversion table
| BDT | HST |
|---|---|
| 12:00 AM | 8:00 AM (previous day) |
| 1:00 AM | 9:00 AM (previous day) |
| 2:00 AM | 10:00 AM (previous day) |
| 3:00 AM | 11:00 AM (previous day) |
| 4:00 AM | 12:00 PM (previous day) |
| 5:00 AM | 1:00 PM (previous day) |
| 6:00 AM | 2:00 PM (previous day) |
| 7:00 AM | 3:00 PM (previous day) |
| 8:00 AM | 4:00 PM (previous day) |
| 9:00 AM | 5:00 PM (previous day) |
| 10:00 AM | 6:00 PM (previous day) |
| 11:00 AM | 7:00 PM (previous day) |
| 12:00 PM | 8:00 PM (previous day) |
| 1:00 PM | 9:00 PM (previous day) |
| 2:00 PM | 10:00 PM (previous day) |
| 3:00 PM | 11:00 PM (previous day) |
| 4:00 PM | 12:00 AM |
| 5:00 PM | 1:00 AM |
| 6:00 PM | 2:00 AM |
| 7:00 PM | 3:00 AM |
| 8:00 PM | 4:00 AM |
| 9:00 PM | 5:00 AM |
| 10:00 PM | 6:00 AM |
| 11:00 PM | 7:00 AM |
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 HST
Hawaii Standard Time (HST) is UTC−10. It is used in Hawaii, which does not observe daylight saving at all.
Hawaii–Aleutian Standard Time is UTC−10 and Hawaii does not observe daylight saving. That makes it the North American zone whose relationship to everywhere else changes twice a year without it doing anything: Hawaii is two hours behind Los Angeles in winter and three in summer. It is also far enough west that the working day barely overlaps with the US east coast at all.
Does this gap change with the seasons?
Neither BDT nor HST shifts with the seasons, so this 16-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 HST?
9:00 AM BDT is 5:00 PM HST (previous day).
Is HST ahead of BDT?
HST is 16 hours behind BDT.
Which time zone does this use?
BDT is UTC+6 and HST is UTC−10. 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.