Oslo is 4.75 hours behind Kathmandu
Best overlap: 12:45 PM to 6:45 PM in Kathmandu is 8:00 AM to 2:00 PM in Oslo.
Both offices are open during 12:45 PM to 6:45 PM Kathmandu time, which is 8:00 AM to 2:00 PM in Oslo. Scheduling is forgiving here: with 6 hours of overlap, a missed slot just means picking another one the same day. Because only Oslo changes its clocks, the overlap above isn't fixed; expect a one-hour shift when Oslo enters or leaves daylight saving.