Prague 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 Prague.
For the smoothest call, aim inside 12:45 PM to 6:45 PM in Kathmandu, i.e. 8:00 AM to 2:00 PM in Prague. Prague is 4.75 hours behind Kathmandu, but with 6 hours of common ground you can hold morning or afternoon meetings without anyone working odd hours. Don't be caught out by clock changes — Prague observes daylight saving and Kathmandu doesn't, so the offset varies by an hour through the year.