Islamabad is 4 hours ahead of Brussels
Best overlap: 8:00 AM to 2:00 PM in Brussels is 12:00 PM to 6:00 PM in Islamabad.
If you set up a recurring sync, 8:00 AM to 2:00 PM in Brussels (12:00 PM to 6:00 PM in Islamabad) is the natural home for it. Because you share 6 hours of the workday, there's no need to compromise; book the time that suits the meeting, not the map. Finally, Brussels observes daylight saving and Islamabad doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.