Does it handle Daylight Saving Time?

Yes, the tool automatically adjusts for Daylight Saving Time based on the specific date you select, ensuring accurate conversions year-round.

Can I add multiple cities?

Yes, you can add as many cities as you need to the dashboard to compare times across your entire global network simultaneously.

Kathmandu to HST

-15h 45m

Kathmandu

NPTSOURCE

Nepal · 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

Kathmandu

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

About Kathmandu

Wikipedia

Kathmandu operates on Nepal Time (NPT), one of the world's unique UTC+5:45 timezones. This 15-minute offset from India makes Nepal time distinctive for global coordination.

Population:1.4 million

Metro:3.0 million

Business Hours:10:00 AM - 5:00 PM NPT

Currency:NPR (रू)

Stock Exchange:NEPSE (Nepal Stock Exchange)

Key Landmarks

Boudhanath StupaSwayambhunathDurbar SquarePashupatinath TempleGarden of Dreams

Did You Know?

Nepal Time (NPT) is one of only three timezones offset by 45 minutes (UTC+5:45).

Learn more about NPT timezone →

Understanding the -15h 45m Gap: Kathmandu vs HST

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

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

Kathmandu to HST time conversion table

Kathmandu (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 Kathmandu to HST time

Scheduling a call from Kathmandu to HST: a 10:00 AM start in Kathmandu 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: Kathmandu 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 Kathmandu.
Watching a live event or market open: Kathmandu viewers need 5:15 PM in HST to catch a 9:00 AM start there, and 3:45 PM if the event is anchored to Kathmandu.

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 Kathmandu 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 Kathmandu 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 Kathmandu, so real-time calls need an early-morning or late-evening slot on one side.

Business hours overlap

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

Kathmandu 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 Kathmandu and HST?

Kathmandu (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 Kathmandu time to HST time?

Add -15h 45m to Kathmandu local time. For example, 9:00 AM in Kathmandu 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 Kathmandu.

What is the best time to call HST from Kathmandu?

There is no shared working-hours window because of the -15h 45m gap. The closest option is 1:00 PM in Kathmandu, which is 9:15 PM in HST.

Which is behind, Kathmandu or HST?

Kathmandu is 15 hours 45 minutes behind HST. When it is 12:00 PM in Kathmandu it is 8:15 PM in HST.

Do Kathmandu and HST use different time zones?

Kathmandu (Nepal) uses NPT at UTC+05:45, while HST uses HST at UTC-10:00. The IANA identifiers are Asia/Kathmandu and Pacific/Honolulu.

Does daylight saving time affect the Kathmandu–HST difference?

Neither zone observes daylight saving time, so the -15h 45m offset between Kathmandu and HST is fixed all year.

Which other cities share Kathmandu's time zone?

NPT also covers Kathmandu, Pokhara, Lalitpur, Bharatpur, Biratnagar.

Which countries use NPT, Kathmandu's zone?

NPT is used in Nepal.

Is there a day difference between Kathmandu and HST?

Sometimes. The -15h 45m gap is large enough that 8:00 PM or later in Kathmandu already falls on the in HST.

What is the time difference between Kathmandu and HST?

HST is -15h 45m from Kathmandu.

What timezone is Kathmandu in?

Kathmandu operates on Nepal Time (NPT), one of the world's unique UTC+5:45 timezones. This 15-minute offset from India makes Nepal time distinctive for global coordination.