NPT to Tehran
-2h 15mNPT
NPTSOURCETehran
IRSTGreen 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 – 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.
IRST – Iran Standard Time
UTC+03:30Iran Standard Time (IRST) is the time zone for Iran, 3 hours and 30 minutes ahead of UTC.
- •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.
About Tehran
WikipediaTehran operates on Iran Standard Time (IRST), UTC+3:30. Iran's unique half-hour offset makes Tehran time distinctive for regional business coordination.
Iran Standard Time (IRST) is one of few timezones with a 30-minute offset (UTC+3:30).
Time Conversion Guide: NPT to Tehran
NPT runs on Nepal Time (NPT) at UTC+05:45. Tehran runs on Iran Standard Time (IRST) at UTC+03:30. That puts NPT 2 hours 15 minutes behind Tehran — 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 Tehran. Midnight in NPT is 9:45 PM in Tehran. Neither zone observes daylight saving time, so the offset between them stays constant all year.
NPT to Tehran time conversion table
| NPT (NPT) | Tehran (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 Tehran time
- Scheduling a call from NPT to Tehran: a 10:00 AM start in NPT lands at 7:45 AM in Tehran, so you can confirm the slot without doing the arithmetic yourself.
- Finding shared working hours: both NPT and Tehran 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.
- Booking travel or deliveries: tracking Tehran local time against NPT keeps pickup windows and arrival estimates honest across the -2h 15m offset.
- 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 Tehran 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 Tehran
Both NPT and Tehran 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 Tehran 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 Tehran (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:
Frequently Asked Questions
What is the time difference between NPT and Tehran?
NPT (NPT, UTC+05:45) is 2 hours 15 minutes behind Tehran (IRST, UTC+03:30). The gap is currently -2h 15m.
How do I convert NPT time to Tehran time?
Add -2h 15m to NPT local time. For example, 9:00 AM in NPT is 6:45 AM in Tehran.
What time is it in Tehran right now?
Tehran 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.
What is the best time to call Tehran from NPT?
Call between 11:15 AM and 5:00 PM NPT — that maps to 9:00 AM–2:45 PM IRST and keeps both parties inside the working day.
Which is behind, NPT or Tehran?
NPT is 2 hours 15 minutes behind Tehran. When it is 12:00 PM in NPT it is 9:45 AM in Tehran.
Do NPT and Tehran use different time zones?
NPT uses NPT at UTC+05:45, while Tehran (Iran) uses IRST at UTC+03:30. The IANA identifiers are Asia/Kathmandu and Asia/Tehran.
Does daylight saving time affect the NPT–Tehran difference?
Neither zone observes daylight saving time, so the -2h 15m offset between NPT and Tehran is fixed all year.
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 Tehran?
Not normally. The -2h 15m gap only pushes the date over the previous day.
What is the time difference between NPT and Tehran?
Tehran is -2h 15m from NPT.
What timezone is NPT in?
NPT operates on its local timezone.
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.
What are the business hours in Tehran?
Standard business hours in Tehran are 8:00 AM - 4:00 PM IRST.
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 IRST timezone?
Major cities in the IRST timezone include Tehran, Isfahan, Mashhad, Tabriz, Shiraz, Karaj.
What is the UTC offset for IRST?
Iran Standard Time (IRST) is at UTC+03:30. During daylight saving time, it shifts to IRDT.
What should I know about the IRST timezone?
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).
When is it midnight in NPT, what time is it in Tehran?
When it is 12:00 AM (midnight) in NPT (NPT), it is -2h 15m later in Tehran (IRST).
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