Montreal is 9.5 hours behind Mumbai

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

Set against a 9.5-hour difference, Mumbai and Montreal run their workdays on completely separate schedules. Block a single recurring off-hours slot that both teams agree on, rather than negotiating a new awkward time every week. Daylight saving complicates things slightly: Montreal observes it, Mumbai doesn't, so the difference flexes by an hour part of the year.