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 Ireland

-4h 45m

NPT

NPTSOURCE

UTC+05:45

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Ireland

IST

UTC+01:00☀ DST active

HH07

MM15

07:15 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

NPT

Ireland

12:00 AM

7:15 PM-1

2:00 AM

9:15 PM-1

4:00 AM

11:15 PM-1

6:00 AM

1:15 AM

8:00 AM

3:15 AM

10:00 AM

5:15 AM

12:00 PM

7:15 AM

2:00 PM

9:15 AM

4:00 PM

11:15 AM

6:00 PM

1:15 PM

8:00 PM

3:15 PM

10:00 PM

5:15 PM

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

NPT and IST on the World Map

The map below highlights the NPT (Nepal Time) and IST (Greenwich Mean Time) timezone regions across the globe.

NPT Zone

→

IST 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

GMT – Greenwich Mean Time

UTC+00:00

Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.

Countries in GMT

United KingdomIrelandIcelandPortugal (mainland)GhanaSenegalMaliMauritaniaGambiaGuineaSierra LeoneLiberiaIvory CoastBurkina FasoMorocco (historically)

Major Cities in GMT

LondonDublinLisbonAccraReykjavikEdinburghCasablancaDakarBamakoAbidjanConakryFreetownMonrovia

Key Facts about GMT

•GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London.
•The Royal Observatory in Greenwich has been the reference point for GMT since 1884.
•GMT and UTC are often used interchangeably, but UTC is based on atomic clocks.
•Iceland uses GMT year-round and never observes daylight saving time.
•The UK switches from GMT to BST (British Summer Time) in late March each year.

Daylight Saving:Yes – switches to BST

Learn more about GMT on Wikipedia

NPT to Ireland Time Difference – Complete Guide

NPT runs on Nepal Time (NPT) at UTC+05:45. Ireland runs on Irish Standard Time (IST) at UTC+01:00, also currently on daylight saving time. That puts NPT 4 hours 45 minutes behind Ireland — a difference of -4h 45m at the current offsets.

In practice, when it is 9:00 AM in NPT it is 4:15 AM in Ireland. Midnight in NPT is 7:15 PM in Ireland.Ireland observes daylight saving time while NPT does not, so the gap narrows or widens by an hour part of the year.

NPT to Ireland time conversion table

NPT (NPT)	Ireland (IST)	Day
12:00 AM	7:15 PM	previous day
6:00 AM	1:15 AM	same day
7:00 AM	2:15 AM	same day
8:00 AM	3:15 AM	same day
9:00 AM	4:15 AM	same day
12:00 PM	7:15 AM	same day
3:00 PM	10:15 AM	same day
5:00 PM	12:15 PM	same day
6:00 PM	1:15 PM	same day
9:00 PM	4:15 PM	same day

Why people convert NPT to Ireland time

Scheduling a call from NPT to Ireland: a 10:00 AM start in NPT lands at 5:15 AM in Ireland, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both NPT and Ireland are inside the 9-to-5 working day between 1:45 PM and 5:00 PM NPT time (9:00 AM–12:15 PM IST). That is roughly 3 hours 15 minutes of usable overlap.
Coordinating a NPT-based team with Ireland contacts: quoting times in the other side's local clock — not your own — removes the single biggest source of missed meetings.

Always state the zone abbreviation, not just the hour. "3:00 PM NPT" is unambiguous; "3 PM" across a -4h 45m gap is not.
Block 1:45 PM–5:00 PM NPT as the recurring meeting window if you work primarily from NPT and need Ireland colleagues present.
Ireland: Clocks fall back on Sun, Oct 25, 2026. Any meeting series spanning that date will shift by an hour in local time.

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 GMT (Greenwich Mean Time)

Greenwich Mean Time (GMT) is the clock time at the Royal Observatory in Greenwich, London, which sits on the Prime Meridian (0° longitude). GMT serves as the reference point from which all other time zones are calculated. The United Kingdom uses GMT during winter months and switches to British Summer Time (BST, UTC+01:00) from late March to late October. Several West African nations use GMT year-round. GMT is often used interchangeably with UTC (Coordinated Universal Time), although technically they are different – UTC is based on atomic clocks while GMT is based on Earth's rotation.

Best time to call between NPT and Ireland

Both NPT and Ireland sit inside the 9 AM – 5 PM working day between 1:45 PM–5:00 PM NPT, which is 9:00 AM–12:15 PM IST. That gives roughly 3 hours and 15 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

NPT and Ireland overlap for about 3 hours during the working day — enough for meetings if you avoid the edges of the window.

NPT is 4 hours 45 minutes behind Ireland (NPT UTC+05:45 → IST UTC+01:00). The shared working window is 1:45 PM–5:00 PM NPT. Remember to re-check around daylight-saving transitions.

🕐 Daylight Saving Time Info

NPT

Does not observe DST

Ireland

☀ Currently in DST

Standard: UTC+00:00 · DST: UTC+01:00

Clocks fall back on Sun, Oct 25, 2026

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 Ireland?

NPT (NPT, UTC+05:45) is 4 hours 45 minutes behind Ireland (IST, UTC+01:00). The gap is currently -4h 45m.

How do I convert NPT time to Ireland time?

Add -4h 45m to NPT local time. For example, 9:00 AM in NPT is 4:15 AM in Ireland.

What time is it in Ireland right now?

Ireland uses IST at UTC+01:00. Use the live converter at the top of this page — it updates in real time and already accounts for the -4h 45m offset from NPT.

What is the best time to call Ireland from NPT?

Call between 1:45 PM and 5:00 PM NPT — that maps to 9:00 AM–12:15 PM IST and keeps both parties inside the working day.

Which is behind, NPT or Ireland?

NPT is 4 hours 45 minutes behind Ireland. When it is 12:00 PM in NPT it is 7:15 AM in Ireland.

Do NPT and Ireland use different time zones?

NPT uses NPT at UTC+05:45, while Ireland (Ireland) uses IST at UTC+01:00. The IANA identifiers are Asia/Kathmandu and Europe/Dublin.

Does daylight saving time affect the NPT–Ireland difference?

Yes at the moment: Ireland is on daylight saving time and NPT is not, so the -4h 45m gap shifts by an hour when exactly one of them changes clocks.

Which other cities share NPT's time zone?

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

Which countries use NPT, NPT's zone?

NPT is used in Nepal.

Is there a day difference between NPT and Ireland?

Not normally. The -4h 45m gap only pushes the date over the previous day.

What is the time difference between NPT and Ireland?

Ireland is -4h 45m from NPT.

What timezone is NPT in?

NPT operates on its local timezone.

What timezone is Ireland in?

Ireland operates on its local timezone.

Which countries use NPT (Nepal Time)?

NPT is used in Nepal.

Does NPT observe daylight saving time?

No, NPT does not observe daylight saving time and remains at UTC+05:45 year-round.

What are some interesting 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.

Which cities are in the GMT timezone?

Major cities in the GMT timezone include London, Dublin, Lisbon, Accra, Reykjavik, Edinburgh, Casablanca, Dakar.

What is the UTC offset for GMT?

Greenwich Mean Time (GMT) is at UTC+00:00. During daylight saving time, it shifts to BST.

What should I know about the GMT timezone?

GMT is based on the Prime Meridian (0° longitude) passing through Greenwich, London. The Royal Observatory in Greenwich has been the reference point for GMT since 1884.