<p>Nope, you have to wait until winter quarter to change your major. Changng your major is pretty easy. If the major you want to switch to is in the same college as your previous major, all you have to do is obtain a change of major petition and get it signed by your old advisor and your new advisor; I’m not sure if the dean’s signature would be necessary in this case. If the major you want to switch you is in a different college, then not only would you need signatures from your old and new advisors, but you would also need signatures from the dean of your old college and the dean of your new college. </p>
<p>BTW, UC Davis is on a quarter system, not a semester system.</p>