An idiot

I went to the autism group's lunch, and was concerned that I couldn't find anyone. I remembered then that the meal was on 23rd December, so I got a pastie and an apple turnover on the way back to the library. When I checked my emails, lunch was on Monday 23rd. I was by now really confused, and went back to the pub, where I found everyone. I ate a three-course meal (don't ask me how), and feel completely stuffed. I enjoyed it though.