Islamabad is 3 hours ahead of Cairo
Best overlap: 8:00 AM to 3:00 PM in Cairo is 11:00 AM to 6:00 PM in Islamabad.
Cairo and Islamabad overlap from 8:00 AM to 3:00 PM (Cairo) to the equivalent 11:00 AM to 6:00 PM in Islamabad — that's your meeting window. Plenty of room to work with: 7 hours of daily overlap means you can prioritise people's preferences over the clock. One seasonal catch: Cairo springs forward and falls back, but Islamabad doesn't, so the gap changes by an hour for several months of the year.