Even if a course is offered in a particular term, if it has an insufficient number of students registered by two weeks prior to the start of a term, it may be cancelled.
Students are encourage to register for courses as early as possible. If you wait too long, a course could be cancelled that your registration might have enabled the course to make. Whether or not a course makes is decided about two weeks before the first day of classes of a new term).
Registration for the Spring term opens September 1.
Registration for the May-Extended, Year-term, Summer, and Fall terms opens March 1.