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.

NPT to IRST

-2h 15m

NPT

NPTSOURCE

UTC+05:45

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

IRST

UTC+03:30

HH09

MM45

09:45 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

NPT

IRST

12:00 AM

9:45 PM-1

2:00 AM

11:45 PM-1

4:00 AM

1:45 AM

6:00 AM

3:45 AM

8:00 AM

5:45 AM

10:00 AM

7:45 AM

12:00 PM

9:45 AM

2:00 PM

11:45 AM

4:00 PM

1:45 PM

6:00 PM

3:45 PM

8:00 PM

5:45 PM

10:00 PM

7:45 PM

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

NPT and IRST on the World Map

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

NPT Zone

→

IRST 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

IRST – Iran Standard Time

UTC+03:30

Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.

Countries in IRST

Iran

Major Cities in IRST

TehranIsfahanMashhadTabrizShirazKaraj

Key Facts about IRST

•IRST is one of only a few time zones with a 30-minute offset.
•Iran observes daylight saving time, switching to IRDT (UTC+04:30).
•Tehran has a metropolitan population of over 16 million.

Daylight Saving:Yes – switches to IRDT

Learn more about IRST on Wikipedia

Understanding the -2h 15m Gap: NPT vs IRST

NPT runs on Nepal Time (NPT) at UTC+05:45. IRST runs on Iran Standard Time (IRST) at UTC+03:30. That puts NPT 2 hours 15 minutes behind IRST — a difference of -2h 15m at the current offsets.

In practice, when it is 9:00 AM in NPT it is 6:45 AM in IRST. Midnight in NPT is 9:45 PM in IRST. Neither zone observes daylight saving time, so the offset between them stays constant all year.

NPT to IRST time conversion table

NPT (NPT)	IRST (IRST)	Day
12:00 AM	9:45 PM	previous day
6:00 AM	3:45 AM	same day
7:00 AM	4:45 AM	same day
8:00 AM	5:45 AM	same day
9:00 AM	6:45 AM	same day
12:00 PM	9:45 AM	same day
3:00 PM	12:45 PM	same day
5:00 PM	2:45 PM	same day
6:00 PM	3:45 PM	same day
9:00 PM	6:45 PM	same day

Why people convert NPT to IRST time

Scheduling a call from NPT to IRST: a 10:00 AM start in NPT lands at 7:45 AM in IRST, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both NPT and IRST are inside the 9-to-5 working day between 11:15 AM and 5:00 PM NPT time (9:00 AM–2:45 PM IRST). That is roughly 5 hours 45 minutes of usable overlap.
Keeping family and friends in sync: knowing that 8:00 PM in NPT is 5:45 PM in IRST 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 -2h 15m gap is not.
Block 11:15 AM–5:00 PM NPT as the recurring meeting window if you work primarily from NPT and need IRST colleagues present.

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 IRST (Iran Standard Time)

Iran Standard Time (IRST) is one of the few time zones with a 30-minute offset. Iran observes daylight saving time (IRDT, UTC+04:30) from late March to late September. Tehran, the capital, is one of the largest cities in the Middle East.

Best time to call between NPT and IRST

Both NPT and IRST sit inside the 9 AM – 5 PM working day between 11:15 AM–5:00 PM NPT, which is 9:00 AM–2:45 PM IRST. That gives roughly 5 hours and 45 minutes of shared time — the safest window for a live call or meeting.

Business hours overlap

NPT and IRST share 5 hours of working-hours overlap (11:15 AM–5:00 PM NPT), so scheduling a live meeting is straightforward.

NPT is 2 hours 15 minutes behind IRST (NPT UTC+05:45 → IRST UTC+03:30). The shared working window is 11:15 AM–5:00 PM NPT. 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 IRST?

NPT (NPT, UTC+05:45) is 2 hours 15 minutes behind IRST (IRST, UTC+03:30). The gap is currently -2h 15m.

How do I convert NPT time to IRST time?

Add -2h 15m to NPT local time. For example, 9:00 AM in NPT is 6:45 AM in IRST.

What time is it in IRST right now?

IRST uses IRST at UTC+03:30. Use the live converter at the top of this page — it updates in real time and already accounts for the -2h 15m offset from NPT.