Kathmandu is 3.75 hours ahead of Bucharest
Best overlap: 8:00 AM to 3:00 PM in Bucharest is 11:45 AM to 6:45 PM in Kathmandu.
Both teams are at their desks between 8:00 AM to 3:00 PM in Bucharest and 11:45 AM to 6:45 PM in Kathmandu. 7 hours of shared hours is more than enough — slot meetings wherever they're most convenient for the people involved. Note the seasonal wrinkle: when Bucharest is on daylight saving and Kathmandu isn't, the gap between them grows or shrinks by an hour.