Best overlap: 8:00 AM to 3:00 PM in Cape Town is 11:00 AM to 6:00 PM in Islamabad.
8:00 AM to 3:00 PM in Cape Town is when Islamabad is also working, at 11:00 AM to 6:00 PM their time. Scheduling is forgiving here: with 7 hours of overlap, a missed slot just means picking another one the same day.
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. -