J.k. Rowling said this quote

The singing grew louder as they approached the church. It made Harry’s throat constrict, it reminded him so forcefully of Hogwarts, of Peeves bellowing rude versions of carols from inside suits of armour, of the Great Hall’s twelve Christmas trees, of Dumbledore wearing a bonnet he had won in a cracker, of Ron in a hand-knitted sweater…