Best overlap: 11:45 AM to 6:45 PM in Kathmandu is 8:00 AM to 3:00 PM in Cape Town.
For the smoothest call, aim inside 11:45 AM to 6:45 PM in Kathmandu, i.e. 8:00 AM to 3:00 PM in Cape Town. The overlap is wide at 7 hours, so you can protect mornings for deep work and still find plenty of meeting time.
24/7 support sounds great until a P1 ticket falls into the gap between Manila signing off and Dublin signing on. Here is how to design a follow-the-sun support model that actually catches tickets at the boundary. -