Kathmandu is 4.75 hours ahead of Zurich
Best overlap: 8:00 AM to 2:00 PM in Zurich is 12:45 PM to 6:45 PM in Kathmandu.
The sweet spot is 8:00 AM to 2:00 PM Zurich time, matching 12:45 PM to 6:45 PM in Kathmandu. Kathmandu is 4.75 hours ahead of Zurich, and with 6 hours of overlap you can even run back-to-back calls without stepping outside business hours. Heads up: because Zurich changes its clocks and Kathmandu doesn't, the difference moves by an hour twice a year. Confirm the overlap around the DST switch.