San Diego is 13.75 hours behind Kathmandu
There is no standard 8-to-6 overlap. Someone joins early or late.
Practically speaking, Kathmandu and San Diego never share office hours; 13.75 hours of separation keeps their days apart. To talk live, someone has to flex: an early start in San Diego can catch the tail end of the day in Kathmandu, or the other way round. Bear in mind San Diego shifts for daylight saving while Kathmandu stays fixed — recheck these hours after each clock change.