For millions of people around the world, July 31 marks a special day: the birthday of author JK Rowling and her most iconic character, Harry Potter. Online, fans gathered to celebrate Harry's birthday by rewatching the films, rereading the books, and even making cakes to replicate the cake Hagrid gifts to Harry on his 12th birthday. In addition to being The Boy Who Lived, Harry Potter as a character also made a huge impact on the lives of many kids who, just like Harry, began wearing glasses at a young age. In fact, Potter's round glasses and his lightning bolt scar are, without a doubt, the most iconic characteristics of his image. According to Mental Floss, the iconic, Made in England, round metal wire glasses that Daniel Radcliffe wore while filming the Harry Potter movies went to auction. The frames were expected to sell for around $3,800 to $6,300, proving just how culturally significant a pair of glasses can be.