Mumbai is 12.5 hours ahead of Seattle

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

Mumbai is 12.5 hours ahead of Seattle, which is far enough that a normal 9-to-5 in one city never reaches the other's working hours. One practical option: Seattle dials in early while it's still late afternoon or evening in Mumbai. Because Seattle and Mumbai don't both observe daylight saving, plan to re-check the overlap around March and November.