Oslo is 1 hour behind Nairobi

Best overlap: 9:00 AM to 6:00 PM in Nairobi is 8:00 AM to 5:00 PM in Oslo.

For the smoothest call, aim inside 9:00 AM to 6:00 PM in Nairobi, i.e. 8:00 AM to 5:00 PM in Oslo. That's a roomy 9 hours of common time each day, so finding a slot that suits everyone is rarely a problem. Daylight saving complicates things slightly: Oslo observes it, Nairobi doesn't, so the difference flexes by an hour part of the year.