Ottawa is 9 hours behind Abu Dhabi
Best overlap: 5:00 PM to 6:00 PM in Abu Dhabi is 8:00 AM to 9:00 AM in Ottawa.
For a call that suits both sides, look at 5:00 PM to 6:00 PM in Abu Dhabi / 8:00 AM to 9:00 AM in Ottawa. Ottawa is 9 hours behind Abu Dhabi, so you only get about 1 hour of overlap a day — worth locking in a standing time like 5:00 PM in Abu Dhabi (8:00 AM in Ottawa) before it slips. Finally, Ottawa observes daylight saving and Abu Dhabi doesn't, so this window shifts by an hour for part of the year — recheck it each spring and autumn.