Tehran is 1.5 hours behind Islamabad
Best overlap: 9:30 AM to 6:30 PM in Islamabad is 8:00 AM to 5:00 PM in Tehran.
Both offices are open during 9:30 AM to 6:30 PM Islamabad time, which is 8:00 AM to 5:00 PM in Tehran. Scheduling is forgiving here: with 9 hours of overlap, a missed slot just means picking another one the same day.