Islamabad is 10 hours ahead of Montreal
There is no standard 8-to-6 overlap. Someone joins early or late.
With 10 hours between them, Montreal and Islamabad have no overlap during standard business hours — by the time one team logs on, the other has logged off. The usual fix is an early start for Montreal or a late finish for Islamabad — pick whichever team has more flexibility. The difference isn't constant year-round: Montreal adjusts for daylight saving while Islamabad holds steady.