Seven years ago, on July 21st 2007, Harry Potter and the Deathly Hallows was released. It was a pretty big day for me, as is visible from half of my Snaps. In J.K. Rowling’s series, the number 7 is described as being “the most magically powerful number” and her writing ties in to that fact very frequently. Seven books in the series, seven years at Hogwarts, Seven Uses of Dragon’s Blood, seven pieces of Voldemort’s soul, etc.
To summarize: the seventh book in the series about Harry’s seventh year at school, in which he hunts down seven pieces of an evil wizard’s soul, was released seven years ago in the seventh month of the year 2007. It called for something special via Snapchat.