<p>is it rude to? if it's only an hour earlier or so?</p>
<p>Yes, it is! You shouldn't reschedule an interview an hour before it happens unless you get into a car accident or have experienced the death of a loved family member or get a heart attack or anything so severe and extreme that you wouldn't even need to ask the question you're asking on CC.</p>
<p>I think what the OP meant was to reschedule the day before to an hour earlier for the interview.</p>
<p>Oh. In that case, it's fine if the interviewer agrees to it, but it's better to do it in advance.</p>
<p>I still believe you better have a damn good reason. If your reason is because you want to go to a baseball game or doc's appointment, then I don't think your college material. Many colleges do not even have interviews anymore, so the more face time you get, the better.</p>