São Paulo is 1 hour ahead of Montreal
Best overlap: 8:00 AM to 5:00 PM in Montreal is 9:00 AM to 6:00 PM in São Paulo.
If you set up a recurring sync, 8:00 AM to 5:00 PM in Montreal (9:00 AM to 6:00 PM in São Paulo) is the natural home for it. With 9 hours of daily overlap, these two cities are an easy pairing; almost any reasonable hour works. Keep an eye on the calendar — Montreal observes daylight saving and São Paulo doesn't, which nudges this window by an hour twice a year.