Frosh Orientation Date

Hello , I have signed up for the last frosh orientation date at San Jose State University , and I am wondering if this will have an affect on my classes? A lot of people are telling me that I will not be able to get my required classes and I’m afraid this will happen due to registration for classes on those dates. I cannot change my date .I dont know how this works :frowning: Will they at least save me some classes ? Lets say I dont get my needed classes this semester is it possible to get them next semester?