OK, I posted before reading all the posts. If I were you when I have to write anniversary dates down for any servicing, I write on a sheet of note paper dates needed for the next year on the last page of the last month of the calendar. Then when I get the new calendar, I can take that note and put the dates in where needed. If I need an appt. for any reason say in June, I make a notation in May to call ahead. Works for me.