San Diego is 10 hours behind Moscow

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

When Moscow starts work, San Diego 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. For part of the year the maths changes: San Diego observes daylight saving, Moscow does not, shifting the overlap by an hour.