Vancouver is 12 hours behind Karachi

There is no standard 8-to-6 overlap. Someone joins early or late.

Coordinating Karachi and Vancouver is tricky: 12 hours of separation means their standard hours don't intersect. Async-first is your friend here. Reserve real-time meetings for the rare occasions someone can log on before or after hours. Just remember Vancouver changes its clocks for daylight saving and Karachi doesn't, so confirm the overlap whenever the seasons turn.