The default expiry date for student TCards is October 1st of each year. You may use your TCard all summer, even if you are not taking classes. Returning students will have their records updated automatically when they register for the Fall term. Non-returning students (including those who have graduated) will lose access to library services on October 1st.
All other TCards have varied expiry dates, depending on the terms of appointment/enrollment. You may check with library staff for more details.