When is the 20th?

Sometimes I believe that my natural hair color should have stayed blond like it was when I was a little girl. I have some classes to take in order to renew my teachers license. I signed up for one of these classes and wrote the dates down so I would not forget. So yesterday, I get up early pack an overnight bag and drive an hour and a half to the class in Milwaukee. I arrive with about 30 minutes to spare. I grab my letter to check the time for registration. On the top of the letter right before the registration time the date is typed. Registration begins at 8:30 on Wednesday June 20th. Good I'm early, then I looked again. WEDNESDAY!!! I was a day late. The genius in me wrote down the wrong day. I had the class written down on Thursday and Friday, but the class started on Wednesday. Can you say BLOND!