Kathmandu is 2.25 hours ahead of Tehran
Best overlap: 8:00 AM to 4:00 PM in Tehran is 10:15 AM to 6:15 PM in Kathmandu.
If you set up a recurring sync, 8:00 AM to 4:00 PM in Tehran (10:15 AM to 6:15 PM in Kathmandu) is the natural home for it. Kathmandu is 2.25 hours ahead of Tehran, but the generous 8-hour window means both teams can meet well within their normal day.