Tehran to Kathmandu Time
IRST to NPT Converter — 9 AM IRST is 11:15 AM NPT
Tehran is 2 hours and 15 minutes behind Kathmandu. Convert any time between Tehran (IRST/IRDT) and Kathmandu (NPT) instantly.
Tehran
Iran
Kathmandu
Nepal
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Time Zone Comparison
Tehran to Kathmandu Time Conversion Table
| Tehran (IRST) | Kathmandu (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 |
Tehran & Kathmandu — Business & Scheduling Guide
Tehran (Iran) is an important regional economy, with key industries in diverse sectors including services and trade. Kathmandu (Nepal) is an important regional economy, known for diverse sectors including services and trade. With a 2.25-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.
Scheduling Meetings Between Tehran and Kathmandu
With only a 2.25-hour gap, Tehran and Kathmandu have generous overlapping work hours. Morning calls in the later time zone align well with mid-day in the other. Business hours typically follow a 9 AM–5 PM schedule. Business hours typically follow a 9 AM–5 PM schedule. Most teams find that late morning to early afternoon offers the widest window for collaboration.
Daylight Saving Time Considerations
Tehran observes Daylight Saving Time (IRST/IRDT), but Kathmandu does not — it stays on NPT year-round. This means the time difference between Tehran and Kathmandu changes by 1 hour when Tehran switches clocks. During Iran's summer, the gap is 1.25–3.25 hours instead of the standard 2.25 hours. Mark DST transition dates on your calendar to avoid missed meetings.
IRST to NPT — Quick Reference
IRST (IRST/IRDT) stands for the timezone used in Tehran, Iran (UTC+3:30). NPT (NPT) is the timezone used in Kathmandu, Nepal (UTC+5:45). Tehran is 2 hours and 15 minutes behind Kathmandu.
To convert IRST to NPT, add 2.25 hours to IRST time. For example, IRST 9:00 AM = NPT 11:15 AM.
Key Facts
- •Time difference: Tehran (UTC+3:30) is 2 hours and 15 minutes behind Kathmandu (UTC+5:45).
- •Daylight Saving Time: Tehran observes DST (IRST/IRDT). Kathmandu does not observe DST (NPT).
- •Regions: Tehran is located in Iran and uses the IRST/IRDT time zone. Kathmandu is located in Nepal and uses the NPT time zone.
- •Best time to call: The best time to call between Tehran and Kathmandu is 9:00 AM to 2:00 PM in Tehran time, when both cities have overlapping standard working hours.
Frequently Asked Questions
What is the time difference between Tehran and Kathmandu?
Tehran is 2 hours and 15 minutes behind Kathmandu.
What time is it in Kathmandu when it's 9 AM in Tehran?
When it's 9:00 AM in Tehran, it is 11:15 AM in Kathmandu.
What time is 9 PM IRST in NPT?
9 PM IRST (Tehran time) is 11:15 PM NPT (Kathmandu time). This is a common time people check when scheduling evening calls across these two time zones.
When is the best time to schedule a meeting between Tehran and Kathmandu?
The best time to schedule a meeting is between 9:00 AM to 2:00 PM in Tehran time, when both cities are within standard working hours (9 AM – 5 PM). This gives you the maximum overlap window for real-time collaboration.
How do I convert IRST to NPT?
IRST (IRST/IRDT) is the timezone for Tehran, Iran (UTC+3:30). NPT (NPT) is the timezone for Kathmandu, Nepal (UTC+5:45). Tehran is 2 hours and 15 minutes behind Kathmandu. Quick examples: 9 AM IRST = 11:15 AM NPT, 12 PM IRST = 2:15 PM NPT, 3 PM IRST = 5:15 PM NPT, 6 PM IRST = 8:15 PM NPT.
Is Tehran ahead of or behind Kathmandu?
Tehran is 2 hours 15 minutes behind Kathmandu. When it's noon in Tehran, it's 2:15 PM in Kathmandu.
Does Tehran or Kathmandu change clocks for Daylight Saving Time?
Yes, Tehran observes DST and switches between IRST/IRDT. Kathmandu does not observe DST — it stays on NPT year-round. Because only one city observes DST, the time difference shifts by 1 hour during transition periods (typically March/April and October/November).
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