What's your OCD?
Now, that must of been really annoying that's happened to me once. Earlier on in my schooling i got a detention as you do because i completely forgot about a piece of homework and i didn't give any excuse just came out with "oops, forgot about that one!" and then i got a detention and the teacher didn't even turn up later i found out she was at the canteen and then she said because it was her fault, she'd forget about the detention mainly because she probably didn't want to be found out by a teacher higher up. She just gave me longer to do the homework in the end.
Rosey: Happy bday to your Mum.
Hopefully you won't fall asleep, although if you're with your parents it's a possibility.