To make you feel better by showing you this happens to other people without major repercussions (and to get the thread back on topic), let me tell you about one of my classes that ended last week. The class normally met Tuesday evenings from 5:45-8:15, but our final exam was scheduled for Tuesday the 9th from 5-7. This information was in the final exam schedule and mentioned in my last lecture (and my lectures are available to the students online). One of my foreign students either forgot or misunderstood this information and showed up for the final exam at 5:45. He was distraught and wanted me to give him an extra 45 minutes for his exam (I couldn't), and so he finally got down to taking the test. In spite of these difficulties, he did fine, as I'm sure you did on your finals. Moral of the story: this is how we learn difficult lessons (I've done the same myself in my student days, and thank goodness for nice professors).