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.

Tehran to NPT

+2h 15m

Tehran

IRSTSOURCE

Iran · 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

Tehran

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

About Tehran

Wikipedia

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.

Population:9.4 million

Metro:16.8 million

Business Hours:8:00 AM - 4:00 PM IRST

Currency:IRR (﷼)

Stock Exchange:TSE (Tehran Stock Exchange)

Key Landmarks

Azadi TowerGolestan PalaceGrand BazaarMilad TowerTabiat Bridge

Did You Know?

Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).

Learn more about IRST timezone →

Tehran vs NPT: Offsets, DST and Best Call Times

Tehran runs on Iran Standard Time (IRST) at UTC+03:30. NPT runs on Nepal Time (NPT) at UTC+05:45. That puts Tehran 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 Tehran it is 11:15 AM in NPT. Midnight in Tehran is 2:15 AM in NPT. Neither zone observes daylight saving time, so the offset between them stays constant all year.

Tehran to NPT time conversion table

Tehran (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 Tehran to NPT time

Scheduling a call from Tehran to NPT: a 10:00 AM start in Tehran lands at 12:15 PM in NPT, so you can confirm the slot without doing the arithmetic yourself.
Finding shared working hours: both Tehran 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.
Watching a live event or market open: Tehran viewers need 11:15 AM in NPT to catch a 9:00 AM start there, and 9:45 PM if the event is anchored to Tehran.

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 Tehran 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 Tehran and NPT

Both Tehran 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

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

Tehran 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 Tehran and NPT?

Tehran (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 Tehran time to NPT time?

Add +2h 15m to Tehran local time. For example, 9:00 AM in Tehran 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 Tehran.

What is the best time to call NPT from Tehran?

Call between 9:00 AM and 2:45 PM IRST — that maps to 11:15 AM–5:00 PM NPT and keeps both parties inside the working day.

Which is ahead, Tehran or NPT?

Tehran is 2 hours 15 minutes ahead of NPT. When it is 12:00 PM in Tehran it is 2:15 PM in NPT.

Do Tehran and NPT use different time zones?

Tehran (Iran) uses IRST at UTC+03:30, while NPT uses NPT at UTC+05:45. The IANA identifiers are Asia/Tehran and Asia/Kathmandu.

Does daylight saving time affect the Tehran–NPT difference?

Neither zone observes daylight saving time, so the +2h 15m offset between Tehran and NPT is fixed all year.

Which other cities share Tehran's time zone?

IRST also covers Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.

Which countries use IRST, Tehran's zone?

IRST is used in Iran.

Is there a day difference between Tehran and NPT?

Not normally. The +2h 15m gap only pushes the date over for late-evening times.

What is the time difference between Tehran and NPT?

NPT is +2h 15m from Tehran.

What timezone is Tehran in?

Tehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.