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.

IRST to NPT

+2h 15m

IRST

IRSTSOURCE

UTC+03:30

HH12

MM00

12:00 (24-hr)

12 AM6 AM12 PM6 PM12 AM

NPT

UTC+05:45

HH02

MM15

14:15 (24-hr)

12 AM6 AM12 PM6 PM12 AM

Quick Reference

Time Conversion Table

IRST

NPT

12:00 AM

2:15 AM

2:00 AM

4:15 AM

4:00 AM

6:15 AM

6:00 AM

8:15 AM

8:00 AM

10:15 AM

10:00 AM

12:15 PM

12:00 PM

2:15 PM

2:00 PM

4:15 PM

4:00 PM

6:15 PM

6:00 PM

8:15 PM

8:00 PM

10:15 PM

10:00 PM

12:15 AM+1

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

IRST and NPT on the World Map

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

IRST Zone

→

NPT Zone

Explore all world timezones interactively →

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

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

Time Conversion Guide: IRST to NPT

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

In practice, when it is 9:00 AM in IRST it is 11:15 AM in NPT. Midnight in IRST is 2:15 AM in NPT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

IRST to NPT time conversion table

IRST (IRST)	NPT (NPT)	Day
12:00 AM	2:15 AM	same day
6:00 AM	8:15 AM	same day
7:00 AM	9:15 AM	same day
8:00 AM	10:15 AM	same day
9:00 AM	11:15 AM	same day
12:00 PM	2:15 PM	same day
3:00 PM	5:15 PM	same day
5:00 PM	7:15 PM	same day
6:00 PM	8:15 PM	same day
9:00 PM	11:15 PM	same day

Why people convert IRST to NPT time

Scheduling a call from IRST to NPT: a 10:00 AM start in IRST lands at 12:15 PM in NPT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both IRST and NPT are inside the 9-to-5 working day between 9:00 AM and 2:45 PM IRST time (11:15 AM–5:00 PM NPT). That is roughly 5 hours 45 minutes of usable overlap.
Coordinating a IRST-based team with NPT 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 IRST" is unambiguous; "3 PM" across a +2h 15m gap is not.
Block 9:00 AM–2:45 PM IRST as the recurring meeting window if you work primarily from IRST and need NPT colleagues present.

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.

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).

Best time to call between IRST and NPT

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

Business hours overlap

IRST and NPT share 5 hours of working-hours overlap (9:00 AM–2:45 PM IRST), so scheduling a live meeting is straightforward.

IRST is 2 hours 15 minutes ahead of NPT (IRST UTC+03:30 → NPT UTC+05:45). The shared working window is 9:00 AM–2:45 PM IRST. 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 IRST and NPT?

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

How do I convert IRST time to NPT time?

Add +2h 15m to IRST local time. For example, 9:00 AM in IRST is 11:15 AM in NPT.

What time is it in NPT right now?

NPT uses NPT at UTC+05:45. Use the live converter at the top of this page — it updates in real time and already accounts for the +2h 15m offset from IRST.