Karachi is 0.75 hours behind Kathmandu
Best overlap: 8:45 AM to 6:45 PM in Kathmandu is 8:00 AM to 6:00 PM in Karachi.
The overlap falls at 8:45 AM to 6:45 PM in Kathmandu, or 8:00 AM to 6:00 PM if you're in Karachi. Scheduling is forgiving here: with 10 hours of overlap, a missed slot just means picking another one the same day.