Brasília is 8 hours behind Islamabad
Best overlap: 4:00 PM to 6:00 PM in Islamabad is 8:00 AM to 10:00 AM in Brasília.
Schedule calls for 4:00 PM to 6:00 PM in Islamabad — your colleagues in Brasília will be online from 8:00 AM to 10:00 AM. Since Brasília is 8 hours behind Islamabad, the overlap is narrow (about 2 hours); a single, well-protected slot beats hunting for time each week.