HST to NPT Time Converter
NPT is 15 hours and 45 minutes ahead of HST. HST is UTC-10:00, and NPT is UTC+5:45.
Best Time to Call Between HST and NPT
Standard 9-to-5 hours in these two zones never overlap, so someone has to take the call outside their working day. The most workable window is 4:00 PM to 10:00 PM HST, which is 7:45 AM to 1:45 PM NPT.
both at work HST only NPT only neither — hours along the strip are HST.
Common Times Converted
HST on the left, NPT on the right.
HST to NPT: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| HST | NPT | Working hours |
|---|---|---|
| 12:00 AM | 3:45 PM | NPT only |
| 1:00 AM | 4:45 PM | NPT only |
| 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 | HST only |
| 10:00 AM | 1:45 AM next day | HST only |
| 11:00 AM | 2:45 AM next day | HST only |
| 12:00 PM | 3:45 AM next day | HST only |
| 1:00 PM | 4:45 AM next day | HST only |
| 2:00 PM | 5:45 AM next day | HST only |
| 3:00 PM | 6:45 AM next day | HST only |
| 4:00 PM | 7:45 AM next day | HST only |
| 5:00 PM | 8:45 AM next day | — |
| 6:00 PM | 9:45 AM next day | NPT only |
| 7:00 PM | 10:45 AM next day | NPT only |
| 8:00 PM | 11:45 AM next day | NPT only |
| 9:00 PM | 12:45 PM next day | NPT only |
| 10:00 PM | 1:45 PM next day | NPT only |
| 11:00 PM | 2:45 PM next day | NPT only |
What HST and NPT Actually Are
HST — Hawaii Standard Time
Honolulu and the rest of Hawaii. Standing at UTC-10:00 as written, and the region does not change its clocks, so that offset holds all year. Hawaii does not observe daylight saving, so this offset holds all year.
Hawaii dropped daylight saving in 1967 and never resumed it. Being close to the equator, its daylight barely varies across the year, so there is little to gain.
NPT — Nepal Time
Kathmandu, Pokhara. Standing at UTC+5:45 as written, and the region does not change its clocks, so that offset holds all year. Nepal sits at UTC+5:45 — one of only two zones in the world on a 45-minute offset.
Nepal is deliberately 15 minutes ahead of India, an offset chosen so the country keeps its own time rather than sharing its neighbor's.
What This Means in Practice
Expect times on the half hour
NPT sits on a 45-minute offset rather than a whole hour, so a round number on one side is never a round number on the other. A 9:00 meeting becomes 45 minutes past the hour, which is exactly the detail calendar invitations get wrong when someone converts in their head.
The date changes mid-working-day
For 8 of the eight hours in a normal HST working day, the equivalent NPT time falls on a different calendar date. Anything scheduled in that stretch needs the date checked as well as the time, or a Tuesday call quietly becomes a Wednesday one at the other end.
A gap you can rely on
Neither region changes its clocks, so this difference holds every day of the year. A recurring meeting booked once stays correct — worth knowing, because most cross-border pairs cannot say that.
Nearly opposite sides of the clock
At 15 hours and 45 minutes apart, one side's morning is the other side's night. Handing work over at the end of a shift usually beats trying to get both parties in the same call.
Major Cities in Each Zone
Cities on HST
Cities on NPT
Frequently Asked Questions
What is the time difference between HST and NPT?
NPT is 15 hours and 45 minutes ahead of HST.
What is 9:00 AM HST in NPT?
9:00 AM HST is 12:45 AM the next day NPT.
What are the best hours to schedule a call between HST and NPT?
Standard business hours in these two zones do not overlap at all, so one side has to work outside the 9-to-5. The most workable window is 4:00 PM to 10:00 PM HST, which is 7:45 AM to 1:45 PM NPT.
Does the difference between HST and NPT change during the year?
No. Neither region changes its clocks, so this gap is fixed all year round.
Does HST always mean Hawaii Standard Time?
Hawaii does not observe daylight saving, so this offset holds all year.
Does NPT always mean Nepal Time?
Nepal sits at UTC+5:45 — one of only two zones in the world on a 45-minute offset.