In order for your name to appear in the printed commencement program, you must apply for graduation at least four weeks prior to the commencement ceremony.
Review the ceremony details for the ceremony that you signed up for. If your courses end in May or August, you will be in the spring/summer ceremony. If your courses end in December or January, you will be in the fall/winter ceremony. These ceremonies are quite different, so be sure you are looking at the appropriate information.