From WOW Insider:
Let's face it. Unless your job is to play WoW (insert my maniacal laughter here), you're probably going to have come up with either some vacation time or "other excuse" to get out of work or school on the 13th of November. Why? Because chances are if you're reading this site then the Wrath of the Lich King release date (November 13th) is just that important. And it is... I mean really... it's the World (of Warcraft) to us all.
10. "I'm having an allergic reaction to my cold medicine, and I need a day to recover."
9. "My dog has at a bunch of chocolate last night and I need to be with him."
8. "I have lice."
Rest of the list after the link