Hong Kong is 12 hours ahead of Montreal

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

Montreal and Hong Kong have no natural overlap. The 12-hour gap is simply too large for regular working hours to meet. Treat the handoff like a relay — Montreal wraps up and leaves notes for Hong Kong to pick up as their day begins. One seasonal catch: Montreal springs forward and falls back, but Hong Kong doesn't, so the gap changes by an hour for several months of the year.