Moscow is 10 hours ahead of Vancouver
There is no standard 8-to-6 overlap. Someone joins early or late.
When Vancouver starts work, Moscow is already winding down or offline — the 10-hour gap leaves no shared window. Default to async and only schedule live time when it genuinely needs a conversation — then make it count. Don't be caught out by clock changes — Vancouver observes daylight saving and Moscow doesn't, so the offset varies by an hour through the year.