Does it account for Daylight Saving Time?

Yes, our converter uses the IANA timezone database, which includes all current DST rules for every timezone in the world.

UTC (Coordinated Universal Time) is the primary time standard by which the world regulates clocks. All timezones are defined as offsets from UTC.

Can I compare multiple timezones at once?

Yes, you can add multiple cities or timezones and see the equivalent times side by side.

How many timezones are there in the world?

There are 38 distinct UTC offsets in use, ranging from UTC-12 to UTC+14. This includes half-hour (UTC+5:30 India, UTC+9:30 Australia) and 45-minute offsets (UTC+5:45 Nepal, UTC+8:45 Australia).

What is the International Date Line?

The International Date Line (IDL) runs roughly along the 180° meridian in the Pacific Ocean. When you cross it westward, you gain a day; crossing eastward, you lose a day.

Why do some timezones have 30 or 45 minute offsets?

Countries chose offsets that best matched their solar noon. India uses UTC+5:30 and Nepal uses UTC+5:45 because standard hourly offsets didn't align well with their geography.

Which country has the most timezones?

France has the most (12 timezones) due to overseas territories. Russia spans 11 timezones. The US has 6 (including Hawaii and Alaska).

NPT to HST

-15h 45m

NPT

NPTSOURCE

UTC+05:45

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

HST

UTC-10:00

HH08

MM15

(previous day)20:15 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

NPT

HST

12:00 AM

8:15 AM-1

2:00 AM

10:15 AM-1

4:00 AM

12:15 PM-1

6:00 AM

2:15 PM-1

8:00 AM

4:15 PM-1

10:00 AM

6:15 PM-1

12:00 PM

8:15 PM-1

2:00 PM

10:15 PM-1

4:00 PM

12:15 AM

6:00 PM

2:15 AM

8:00 PM

4:15 AM

10:00 PM

6:15 AM

Green rows indicate typical business hours (9 AM - 5 PM)

NPT and HST on the World Map

The map below highlights the NPT (Nepal Time) and HST (Hawaii Standard Time) timezone regions across the globe.

NPT Zone

→

HST Zone

Explore all world timezones interactively →

NPT – Nepal Time

UTC+05:45

Nepal Time (NPT, UTC+05:45) is the time zone for Nepal — one of the few offsets in the world set on a 45-minute increment.

Countries in NPT

Nepal

Major Cities in NPT

KathmanduPokharaLalitpurBharatpurBiratnagar

Key Facts about NPT

•Nepal Time is UTC+05:45 — a 45-minute offset, not a whole or half hour.
•The 45-minute offset was adopted in 1986 to match Kathmandu's solar time.
•Nepal does not observe daylight saving time.
•Nepal is 15 minutes ahead of India, despite sharing a long open border.

Daylight Saving:No – UTC+05:45 year-round

Learn more about NPT on Wikipedia

HST – Hawaii Standard Time

UTC-10:00

Hawaii Standard Time (HST) is the time zone for the Hawaiian Islands, 10 hours behind UTC.

Countries in HST

United States (Hawaii)

Major Cities in HST

HonoluluHiloKailuaPearl CityKapolei

Key Facts about HST

•Hawaii does not observe daylight saving time.
•HST is 5 hours behind EST in winter and 6 hours behind EDT in summer.
•Hawaii is one of only two US states that don't observe DST (the other is Arizona).

Daylight Saving:No – UTC-10:00 year-round

Learn more about HST on Wikipedia

Everything You Need to Know About NPT and HST Time

NPT runs on Nepal Time (NPT) at UTC+05:45. HST runs on Hawaii Standard Time (HST) at UTC-10:00. That puts NPT 15 hours 45 minutes behind HST — a difference of -15h 45m at the current offsets.

In practice, when it is 9:00 AM in NPT it is 5:15 PM in HST on the previous day. Midnight in NPT is 8:15 AM in HST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

NPT to HST time conversion table

NPT (NPT)	HST (HST)	Day
12:00 AM	8:15 AM	previous day
6:00 AM	2:15 PM	previous day
7:00 AM	3:15 PM	previous day
8:00 AM	4:15 PM	previous day
9:00 AM	5:15 PM	previous day
12:00 PM	8:15 PM	previous day
3:00 PM	11:15 PM	previous day
5:00 PM	1:15 AM	same day
6:00 PM	2:15 AM	same day
9:00 PM	5:15 AM	same day

Why people convert NPT to HST time

Scheduling a call from NPT to HST: a 10:00 AM start in NPT lands at 6:15 PM in HST the previous day, so you can confirm the slot without doing the arithmetic yourself.
Handling a -15h 45m gap: NPT and HST have no overlap inside a normal 9-to-5 day, so real-time meetings need an early-morning or late-evening slot on one side. 9:00 AM in HST is 5:15 PM in NPT.
Booking travel or deliveries: tracking HST local time against NPT keeps pickup windows and arrival estimates honest across the -15h 45m offset.

Always state the zone abbreviation, not just the hour. "3:00 PM NPT" is unambiguous; "3 PM" across a -15h 45m gap is not.
With a -15h 45m gap there is no shared 9-to-5 window, so alternate the early start: one week NPT takes the early slot, the next week HST does.

About NPT (Nepal Time)

Nepal Time (NPT) runs at UTC+05:45, one of only a handful of time zones worldwide that are not a whole or half hour from UTC. Nepal set its offset to 5 hours 45 minutes ahead of UTC in 1986 to mark the country's position between the 75°E and 90°E meridians; Kathmandu's solar time sits just over 5 hours 41 minutes ahead of Greenwich, so the 45-minute offset tracks the sun more closely than either 5:30 or 6:00 would. Nepal does not observe daylight saving time, so NPT is fixed all year. The offset makes Nepal 15 minutes ahead of India Standard Time (UTC+05:30) and 2 hours 15 minutes ahead of Dubai (UTC+04:00).

About HST (Hawaii Standard Time)

Hawaii Standard Time (HST) is used in the state of Hawaii and does not observe daylight saving time. This makes HST one of the most consistent time zones in the US. The Hawaiian Islands are among the last places on Earth to see a new calendar day.

Best time to call between NPT and HST

With a -15h 45m offset there is no overlap inside a normal 9 AM – 5 PM day. HST opens at 9:00 AM HST, which is 5:15 PM in NPT, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

NPT and HST have no shared working hours because of the -15h 45m gap. Teams need to alternate early starts or rely on asynchronous handovers.

NPT is 15 hours 45 minutes behind HST (NPT UTC+05:45 → HST UTC-10:00). There is no shared 9-to-5 window, so plan around an early or late slot. Remember to re-check around daylight-saving transitions.

Learn More About Time

Dive deeper into the fascinating world of timekeeping, time zones, and how they shape our global society:

⏳

History of Timekeeping

From sundials to atomic clocks - 5000 years of measuring time

🌍

How Time Zones Work

UTC, offsets, and why zones don't follow straight lines

☀️

Daylight Saving Time

DST dates, which countries observe it, and the ongoing debate

Frequently Asked Questions

What is the time difference between NPT and HST?

NPT (NPT, UTC+05:45) is 15 hours 45 minutes behind HST (HST, UTC-10:00). The gap is currently -15h 45m.

How do I convert NPT time to HST time?

Add -15h 45m to NPT local time. For example, 9:00 AM in NPT is 5:15 PM in HST (previous day).

What time is it in HST right now?

HST uses HST at UTC-10:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -15h 45m offset from NPT.