<p>As far as I know, you have to register on the 2nd day. On the first day you usually attend a workshop or two about scheduling and you have a chance to look through courses you want to take. On day two (provided that they haven’t changed this in the past couple of years) you meet with a faculty member who goes over your prospective courses and offers advice on scheduling in general (tips on how to not overload and ideas on interesting courses). That faculty person will give you your registration code where you then go and register at a designated time. And then, you basically have someone entering the courses into the computer for you.</p>