<p>i feel like i made some mistakes when i chose my classes. how much time do i have to change my classes?</p>
<p>Until Friday, Sept. 18th ([Colby</a> College: Registrar: Critical Dates and Deadlines 2009-2010](<a href=“http://www.colby.edu/registrar/crdates0910.html]Colby”>http://www.colby.edu/registrar/crdates0910.html)).</p>