Nairobi is 1 hour ahead of Oslo
Best overlap: 8:00 AM to 5:00 PM in Oslo is 9:00 AM to 6:00 PM in Nairobi.
If you set up a recurring sync, 8:00 AM to 5:00 PM in Oslo (9:00 AM to 6:00 PM in Nairobi) is the natural home for it. Despite the 1-hour difference, a 9-hour overlap keeps things simple and gives both teams breathing room. These times hold for most of the year, but Oslo's daylight saving (which Nairobi doesn't use) shifts them by an hour twice annually.