Nairobi is 8 hours ahead of Ottawa
Best overlap: 8:00 AM to 10:00 AM in Ottawa is 4:00 PM to 6:00 PM in Nairobi.
Ottawa and Nairobi overlap from 8:00 AM to 10:00 AM (Ottawa) to the equivalent 4:00 PM to 6:00 PM in Nairobi — that's your meeting window. Nairobi is 8 hours ahead of Ottawa, which leaves a narrow 2-hour window. Treat 8:00 AM in Ottawa (4:00 PM in Nairobi) as the time and build around it. A quick caveat — Ottawa's clocks move for daylight saving and Nairobi's don't, so the times here are right for only part of the year.