Miami is 12 hours behind Shanghai

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

Shanghai and Miami have no natural overlap. The 12-hour gap is simply too large for regular working hours to meet. Treat the handoff like a relay — Miami wraps up and leaves notes for Shanghai to pick up as their day begins. One seasonal catch: Miami springs forward and falls back, but Shanghai doesn't, so the gap changes by an hour for several months of the year.