Boston is 10 hours behind Dhaka

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

With 10 hours between them, Dhaka and Boston have no overlap during standard business hours — by the time one team logs on, the other has logged off. The usual fix is an early start for Boston or a late finish for Dhaka — pick whichever team has more flexibility. One seasonal catch: Boston springs forward and falls back, but Dhaka doesn't, so the gap changes by an hour for several months of the year.