S.W.
I don't see why her old friends wouldn't come to the party. We've dealt with something similar from the other end, being invited to parties of children who were in a different class this year. My 6 yr. old is in 1st grade and none of the girls from her Kindergarten class are in her 1st grade class and only 3 of the boys she went K with are. We've been to a couple parties of former classmates already this school year and will be attending another one this weekend. It makes sense to me really. When kids have birthdays early in the school year they haven't had enough time to really make new friends in their new classes (or schools). I see nothing wrong with inviting your daughter's former schoolmates to her party. Those are the kids she spent the most time around and is probably most bonded to for the time being, until she's spent more time with her new schoolmates. I'd invite a few of her new classmates also, if there's any she's interested in inviting.