Vancouver is 12.75 hours behind Kathmandu
There is no standard 8-to-6 overlap. Someone joins early or late.
Kathmandu and Vancouver have no natural overlap. The 12.75-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 Kathmandu to pick up as their day begins. A quick caveat — Vancouver's clocks move for daylight saving and Kathmandu's don't, so the times here are right for only part of the year.