Convert HST to NPT
NPT is 15 hours 45 minutes ahead of HST. HST is UTC−10 and NPT is UTC+5:45.
Right now: HST · NPT
Best time to schedule a meeting
Standard 9–5 working hours do not overlap at all between HST and NPT. Someone has to take an early or late call — or use asynchronous communication instead.
| HST | NPT | Suitable? |
|---|---|---|
| 9:00 AM | 12:45 AM (next day) | outside 9–5 |
| 10:00 AM | 1:45 AM (next day) | outside 9–5 |
| 11:00 AM | 2:45 AM (next day) | outside 9–5 |
| 12:00 PM | 3:45 AM (next day) | outside 9–5 |
| 1:00 PM | 4:45 AM (next day) | outside 9–5 |
| 2:00 PM | 5:45 AM (next day) | outside 9–5 |
| 3:00 PM | 6:45 AM (next day) | outside 9–5 |
| 4:00 PM | 7:45 AM (next day) | outside 9–5 |
| 5:00 PM | 8:45 AM (next day) | outside 9–5 |
HST to NPT conversion table
| HST | NPT |
|---|---|
| 12:00 AM | 3:45 PM |
| 1:00 AM | 4:45 PM |
| 2:00 AM | 5:45 PM |
| 3:00 AM | 6:45 PM |
| 4:00 AM | 7:45 PM |
| 5:00 AM | 8:45 PM |
| 6:00 AM | 9:45 PM |
| 7:00 AM | 10:45 PM |
| 8:00 AM | 11:45 PM |
| 9:00 AM | 12:45 AM (next day) |
| 10:00 AM | 1:45 AM (next day) |
| 11:00 AM | 2:45 AM (next day) |
| 12:00 PM | 3:45 AM (next day) |
| 1:00 PM | 4:45 AM (next day) |
| 2:00 PM | 5:45 AM (next day) |
| 3:00 PM | 6:45 AM (next day) |
| 4:00 PM | 7:45 AM (next day) |
| 5:00 PM | 8:45 AM (next day) |
| 6:00 PM | 9:45 AM (next day) |
| 7:00 PM | 10:45 AM (next day) |
| 8:00 PM | 11:45 AM (next day) |
| 9:00 PM | 12:45 PM (next day) |
| 10:00 PM | 1:45 PM (next day) |
| 11:00 PM | 2:45 PM (next day) |
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.
About NPT
Nepal Time (NPT) is UTC+5:45. It is used in Nepal, all year.
Nepal Time is UTC+5:45 — the only zone in the world offset by three quarters of an hour, set so that noon falls over Kathmandu rather than over the Indian meridian fifteen minutes away. It breaks almost every piece of software that stores offsets in whole or half hours, and it is fifteen minutes ahead of India rather than the round number people assume.
Does this gap change with the seasons?
Neither HST nor NPT shifts with the seasons, so this 15.75-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 HST in NPT?
9:00 AM HST is 12:45 AM NPT (next day).
Is NPT ahead of HST?
NPT is 15 hours 45 minutes ahead of HST.
Which time zone does this use?
HST is UTC−10 and NPT is UTC+5:45. 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.