Kathmandu is 10.75 hours ahead of Washington, D.C.
There is no standard 8-to-6 overlap. Someone joins early or late.
Kathmandu is 10.75 hours ahead of Washington, D.C., which is far enough that a normal 9-to-5 in one city never reaches the other's working hours. One practical option: Washington, D.C. dials in early while it's still late afternoon or evening in Kathmandu. Because Washington, D.C. and Kathmandu don't both observe daylight saving, plan to re-check the overlap around March and November.