Mumbai is 9.5 hours ahead of Montreal

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

Montreal and Mumbai are 9.5 hours apart, and that gap is wide enough that their normal 9-to-5 workdays never quite touch. If you meet regularly, fix one off-hours slot and rotate it between Montreal and Mumbai so the burden doesn't fall on one team. These times hold for most of the year, but Montreal's daylight saving (which Mumbai doesn't use) shifts them by an hour twice annually.