This event has passed. Day 1 Spring/Summer 2021 Date: May 3 Event Category: Academic Venue Oshawa and Whitby Campus Details: Classes begin for post-secondary students + Google Calendar+ iCal Export Related Events Jun 21 Reading Week Spring/Summer 2021 Learn more about this event. Jun 22 Mid-term marks released for May semester courses at 4 p.m. Learn more about this event. Jul 19 Last day to withdraw from a course with a W for Spring/Summer 2021 Learn more about this event.