Montreal is 9.5 hours behind Chennai
Best overlap: 5:30 PM to 6:30 PM in Chennai is 8:00 AM to 9:00 AM in Montreal.
Your shared working hours run 5:30 PM to 6:30 PM in Chennai (8:00 AM to 9:00 AM in Montreal). The window is short at 1 hour, so keep meetings tight and anchored to 5:30 PM in Chennai (8:00 AM in Montreal). Watch the DST gap — when Montreal changes its clocks and Chennai stays the same, this window slides by an hour.