Beijing is 12 hours ahead of Atlanta

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

When Atlanta starts work, Beijing is already winding down or offline — the 12-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: Atlanta observes daylight saving, Beijing does not, shifting the overlap by an hour.