I don't like the number 12

I'm having issues today. I think I'm suffering from a rare condition called "post-vacation brain syndrome." Everything seems so difficult to manage. For one, I can't write the number 12 today on reserve slips. We're three days into December and the whole idea of writing 12 instead of 11 still elludes me. *sigh* And now it has gotten worse, apparently, I can't even write names correctly. Oy. I think I may need to seek medical attention.