Seattle is 10 hours behind Riyadh

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

When Riyadh starts work, Seattle 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. Daylight saving complicates things slightly: Seattle observes it, Riyadh doesn't, so the difference flexes by an hour part of the year.