Islamabad is 8 hours ahead of São Paulo
Best overlap: 8:00 AM to 10:00 AM in São Paulo is 4:00 PM to 6:00 PM in Islamabad.
Aim for 8:00 AM to 10:00 AM São Paulo time — that's 4:00 PM to 6:00 PM over in Islamabad. Since Islamabad is 8 hours ahead of São Paulo, the overlap is narrow (about 2 hours); a single, well-protected slot beats hunting for time each week.