Go to 2020 Makeup Exam Dates to see this year’s alternate exam dates.. Portfolio Courses. Note that we’ve extended the deadlines to submit portfolios for the three AP Art and Design courses, AP Seminar, AP Research, and AP Computer Science Principles to May 26, 2020, 11:59 p.m. ET.. The AP Seminar and AP Computer Science Principles assessments will not include an end-of-course exam this year.