Islamabad is 4 hours ahead of Stockholm
Best overlap: 8:00 AM to 2:00 PM in Stockholm is 12:00 PM to 6:00 PM in Islamabad.
Your window to reach both cities is 8:00 AM to 2:00 PM in Stockholm, which converts to 12:00 PM to 6:00 PM in Islamabad. 6 hours of shared hours is more than enough — slot meetings wherever they're most convenient for the people involved. Bear in mind Stockholm shifts for daylight saving while Islamabad stays fixed — recheck these hours after each clock change.