Dhaka is 13 hours ahead of San Diego
There is no standard 8-to-6 overlap. Someone joins early or late.
San Diego and Dhaka have no natural overlap. The 13-hour gap is simply too large for regular working hours to meet. Treat the handoff like a relay — San Diego wraps up and leaves notes for Dhaka to pick up as their day begins. One seasonal catch: San Diego springs forward and falls back, but Dhaka doesn't, so the gap changes by an hour for several months of the year.