Hamburg 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 Hamburg.
Keep meetings inside 12:45 PM to 6:45 PM in Kathmandu — that maps to 8:00 AM to 2:00 PM in Hamburg. Hamburg is 4.75 hours behind Kathmandu, but you still share a generous 6 hours of overlap, so scheduling is easy and there's room to move a meeting when you need to. These times hold for most of the year, but Hamburg's daylight saving (which Kathmandu doesn't use) shifts them by an hour twice annually.