looking for fic

[Guest thamcham]

I remember it was some sort of anniversary of hogwarts, and there was a book that ginny luna and hermione could plug weekly wishes into. Anybody knowwhere I can find it? 

[Guest Exploding Tuna Sandwich]

I think you are thinking of Spellenial by Joe Forest, but it’s Hermione, Cho, and Luna, not Ginny.