Actually Twice! It is every 7 years! Their wedding night. 7th anniversary, which we see at the end of the 3rd movie. 14th anniversary, which we do not see but I don't believe either of them would miss it.
Hello,welcome to my board, Hogwarts next generation role play. If you want to join, comment on one of my pins. But there are rules. The rules are No stealing characters No copying each other's names Be original If you fail to follow these rules , you will be kicked out.