Hi @SamGames
When a date is set in Canvas, the setting is based on the time zone that is set for the school's Canvas server, or for the individual course if the instructor has set the time zone in the course settings.
So, if the school's Canvas (or the course) is set to use Eastern time, and you are in Central time (or at least, have set Central Time as your time zone in your Canvas account settings), then an 11:59pm due date set in the class will appear as 10:59pm for you. This makes the assignment due at the same time *actual* time for all students no matter what time zone they are in.