Islamabad is 1.5 hours ahead of Tehran
Best overlap: 8:00 AM to 5:00 PM in Tehran is 9:30 AM to 6:30 PM in Islamabad.
The best time to meet is 8:00 AM to 5:00 PM in Tehran, which is 9:30 AM to 6:30 PM in Islamabad. A 9-hour overlap gives you real choice here — early or late in the window both work comfortably.