Hanoi is 14 hours ahead of Vancouver

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

Vancouver and Hanoi have no natural overlap. The 14-hour gap is simply too large for regular working hours to meet. Treat the handoff like a relay — Vancouver wraps up and leaves notes for Hanoi to pick up as their day begins. A quick caveat — Vancouver's clocks move for daylight saving and Hanoi's don't, so the times here are right for only part of the year.