What is Differs by program (calendar system) ?
Differs by program (calendar system) meaning A calendar system classification that is used by institutions that have occupational/vocational programs of varying lengths. These schools may enroll students at specific times depending on the program desired. For example, a school might offer a 2-month program in January, March, May, September, and November; and a 3-month program in January, April, and October.
reference: IPEDS Data Collectrion System – Glossary