Vancouver is 10 hours behind Riyadh
There is no standard 8-to-6 overlap. Someone joins early or late.
Riyadh and Vancouver are too far apart in time (10 hours) for their workdays to line up during regular hours. For anything urgent, agree on an early-morning or late-night bridge hour in advance so nobody's caught off guard. The window above shifts seasonally: Vancouver keeps daylight saving while Riyadh ignores it.