Auditory Calendar

I know as a teacher I'm not suppose to have favorites, but I just do. One of them is George. George is a high functioning autistic student and now in 2nd grade. He loves to write math on the white board so it looks just like a worksheet (complete with name, date, directions, and page number). Yesterday he did 3 digit addition with regrouping and today was 3 digit subtraction with renaming. Tomorrow he's planned multiplication facts. He taught himself all of this as it's 3rd grade level math.
George also is fixated on dates and days off of school. Whenever we have a day off or it's the weekend he tells me at least 7 times the days we will have off. For example, the Wed. before Thanksgiving he told me, "Mrs. Jones, no school on Thursday and Friday, ok?" many time throughout the day. This leaves me wondering, the day before winter break will he tell me, "No school on Saturday, Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday, Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, Sunday, ok?"