Geneva is 4 hours behind Islamabad
Best overlap: 12:00 PM to 6:00 PM in Islamabad is 8:00 AM to 2:00 PM in Geneva.
The hours that work for both Islamabad and Geneva are 12:00 PM to 6:00 PM (Islamabad) and 8:00 AM to 2:00 PM (Geneva). 6 hours of shared hours is more than enough — slot meetings wherever they're most convenient for the people involved. Bear in mind Geneva shifts for daylight saving while Islamabad stays fixed — recheck these hours after each clock change.