Exam period is April 23 - May 09. Exam period is April 23 - May 09. Exam period is June 26-30. Exam period is August 14-17. Exam period is August 14-17.
H means it is a half course.
Y means it is a full course. This is independent from the session information explained above. Do not confuse the two, as various different combinations exist. For example, there can be half courses that take both summer subsessions, and full courses that take only one subsession. Consider weight and session carefully when making your course selections and accomodating them and your other activities.