Vancouver is 12 hours behind Islamabad
There is no standard 8-to-6 overlap. Someone joins early or late.
Vancouver is 12 hours behind Islamabad, which is far enough that a normal 9-to-5 in one city never reaches the other's working hours. One practical option: Vancouver dials in early while it's still late afternoon or evening in Islamabad. Keep an eye on the calendar — Vancouver observes daylight saving and Islamabad doesn't, which nudges this window by an hour twice a year.