Kathmandu is 14.75 hours ahead of Anchorage
There is no standard 8-to-6 overlap. Someone joins early or late.
The 14.75-hour offset between Anchorage and Kathmandu means there's no point hunting for a 9-to-5 overlap — there isn't one. Expect compromise: someone in Anchorage or Kathmandu will need to take the call outside the usual 9-to-5, so share that load. Finally, Anchorage observes daylight saving and Kathmandu doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.