Cancel classes day before spring break?

Earlier this week, Jim asked in class what our opinions were about teachers canceling classes the day before breaks since often times many students need to leave early. I did not have a strong opinion of this at the time, but since have thought more about it. I think that teachers should absolutely NOT cancel their classes. For example, this upcoming spring break, the break is officially marked on teh calendar as starting on Saturday. Students should make their accomodations for leaving after their classes are finished. Jim gave the example of someone needing to leave early to catch a flight. I'd say- Book your flight for a later time that you can still make it to after attending your classes. If professors are going to cancel classes, then students are going to try to leave early from their Thursday classes. There needs to be a definite start of break, which is Saturday of after your Friday classes are over. I do think there could be a few extreme case exceptions to this, but in general, I belive if I student elects to miss a class right before break, they should suffer the consequences of missing class just like if they skipped any other day of class that semester.