Addis Ababa is 7 hours ahead of Montreal
Best overlap: 8:00 AM to 11:00 AM in Montreal is 3:00 PM to 6:00 PM in Addis Ababa.
Shoot for 8:00 AM to 11:00 AM in Montreal; your Addis Ababa colleagues will see that as 3:00 PM to 6:00 PM. Addis Ababa is 7 hours ahead of Montreal, so the practical overlap is about 3 hours — generous enough for meetings, tight enough to be worth booking ahead. Note that Montreal follows daylight saving while Addis Ababa stays put, so the times above drift by an hour seasonally.