Addis Ababa is 3 hours ahead of Reykjavik
Best overlap: 8:00 AM to 3:00 PM in Reykjavik is 11:00 AM to 6:00 PM in Addis Ababa.
If you set up a recurring sync, 8:00 AM to 3:00 PM in Reykjavik (11:00 AM to 6:00 PM in Addis Ababa) is the natural home for it. Despite the 3-hour difference, a 7-hour overlap keeps things simple and gives both teams breathing room.