To be very honest, I'm not totally for sure because I got several answers from Nursing Department before. However, I do know they do not open up the application until the first week of January and looking online now the application is no longer posted, so I will assume that January and February are the only times to submit an application. Someone correct me if I am wrong
There are usually two summer session, one that starts on May 29th and another one that starts the first week July. July session are usually for the people who got waitlisted.