The document provides the academic calendar for the third semester of the 2021 batch for various programs at Delhi Skill and Entrepreneurship University. It outlines the start and end dates for classes, mid-semester and end-semester examinations, activity days with no classes, and important holidays for Diploma, Undergraduate, B.Tech, M.Tech and MCA programs. Important dates include the commencement of classes on September 26 for Diploma and Undergraduate programs and October 17 for B.Tech, M.Tech and MCA programs. The last teaching days are January 6, 20, and February 10 respectively and examinations will be conducted in the weeks following.