NPT to Dublin
-4h 45mNPT
NPTSOURCEDublin
ISTGreen 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 – Nepal Time
UTC+05:45Nepal 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.
- •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.
GMT – Greenwich Mean Time
UTC+00:00Greenwich Mean Time (GMT) is the mean solar time at the Royal Observatory in Greenwich, London. It is the same as UTC+00:00.
- •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.
Understanding the -4h 45m Gap: NPT vs Dublin
NPT runs on Nepal Time (NPT) at UTC+05:45. Dublin runs on Irish Standard Time (IST) at UTC+01:00, also currently on daylight saving time. That puts NPT 4 hours 45 minutes behind Dublin — 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 Dublin. Midnight in NPT is 7:15 PM in Dublin.Dublin observes daylight saving time while NPT does not, so the gap narrows or widens by an hour part of the year.
NPT to Dublin time conversion table
| NPT (NPT) | Dublin (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 Dublin time
- Scheduling a call from NPT to Dublin: a 10:00 AM start in NPT lands at 5:15 AM in Dublin, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both NPT and Dublin 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.
- Keeping family and friends in sync: knowing that 8:00 PM in NPT is 3:15 PM in Dublin makes it easy to avoid calling at 3 AM.
- 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 Dublin colleagues present.
- Dublin: 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 Dublin
Both NPT and Dublin 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 Dublin 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 Dublin (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
Dublin
☀ 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:
Frequently Asked Questions
What is the time difference between NPT and Dublin?
NPT (NPT, UTC+05:45) is 4 hours 45 minutes behind Dublin (IST, UTC+01:00). The gap is currently -4h 45m.
How do I convert NPT time to Dublin time?
Add -4h 45m to NPT local time. For example, 9:00 AM in NPT is 4:15 AM in Dublin.
What time is it in Dublin right now?
Dublin 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 Dublin 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 Dublin?
NPT is 4 hours 45 minutes behind Dublin. When it is 12:00 PM in NPT it is 7:15 AM in Dublin.
Do NPT and Dublin use different time zones?
NPT uses NPT at UTC+05:45, while Dublin (Ireland) uses IST at UTC+01:00. The IANA identifiers are Asia/Kathmandu and Europe/Dublin.
Does daylight saving time affect the NPT–Dublin difference?
Yes at the moment: Dublin 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 Dublin?
Not normally. The -4h 45m gap only pushes the date over the previous day.
What is the time difference between NPT and Dublin?
Dublin is -4h 45m from NPT.
What timezone is NPT in?
NPT operates on its local timezone.
What timezone is Dublin in?
Dublin 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.
When is it midnight in NPT, what time is it in Dublin?
When it is 12:00 AM (midnight) in NPT (NPT), it is -4h 45m later in Dublin (GMT).
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