i'm an ms1 at pcom. they were late interviewing this year due to some staff changes in the admissions department. i think they started in the beginning of october. to answer your questions, last year they interviewed through march, might go a little later this year due to the late start. they can call you any time up to then. i have never heard of anyone getting any rejection letters until after they had filled the class...july or august. say patient, and good luck!