Nairobi is 10 hours ahead of Vancouver

There is no standard 8-to-6 overlap. Someone joins early or late.

Vancouver and Nairobi live on different parts of the day. With 10 hours between them, standard working hours simply don't meet. Make the most of handoffs — end-of-day in one city becomes start-of-day in the other, so pass work along rather than meeting live. For part of the year the maths changes: Vancouver observes daylight saving, Nairobi does not, shifting the overlap by an hour.