Istanbul is 8 hours ahead of Ottawa
Best overlap: 8:00 AM to 10:00 AM in Ottawa is 4:00 PM to 6:00 PM in Istanbul.
The best time to meet is 8:00 AM to 10:00 AM in Ottawa, which is 4:00 PM to 6:00 PM in Istanbul. Istanbul is 8 hours ahead of Ottawa, which leaves a narrow 2-hour window. Treat 8:00 AM in Ottawa (4:00 PM in Istanbul) as the time and build around it. Note the seasonal wrinkle: when Ottawa is on daylight saving and Istanbul isn't, the gap between them grows or shrinks by an hour.