Vancouver is 12.5 hours behind Colombo
There is no standard 8-to-6 overlap. Someone joins early or late.
Vancouver is 12.5 hours behind Colombo, so their typical working days don't line up at all. Plan on one side joining outside normal hours. A recurring slot that trades off between early mornings and late evenings usually works best. The window above shifts seasonally: Vancouver keeps daylight saving while Colombo ignores it.