Reykjavik is 5.75 hours behind Kathmandu
Best overlap: 1:45 PM to 6:45 PM in Kathmandu is 8:00 AM to 1:00 PM in Reykjavik.
Target 1:45 PM to 6:45 PM in Kathmandu, which lands at 8:00 AM to 1:00 PM for the Reykjavik side. Since Reykjavik is 5.75 hours behind Kathmandu, the workdays overlap by around 5 hours; 1:45 PM in Kathmandu (8:00 AM in Reykjavik) makes a reliable recurring slot.