Ottawa is 1 hour ahead of Dallas
Best overlap: 8:00 AM to 5:00 PM in Dallas is 9:00 AM to 6:00 PM in Ottawa.
Keep meetings inside 8:00 AM to 5:00 PM in Dallas — that maps to 9:00 AM to 6:00 PM in Ottawa. Ottawa is 1 hour ahead of Dallas, but the generous 9-hour window means both teams can meet well within their normal day.