Abu Dhabi is 8 hours ahead of Montreal
Best overlap: 8:00 AM to 10:00 AM in Montreal is 4:00 PM to 6:00 PM in Abu Dhabi.
Target 8:00 AM to 10:00 AM in Montreal, which lands at 4:00 PM to 6:00 PM for the Abu Dhabi side. The overlap barely stretches to 2 hours, so reserve it for what really needs a live conversation and handle the rest async. Daylight saving complicates things slightly: Montreal observes it, Abu Dhabi doesn't, so the difference flexes by an hour part of the year.