I have a book called the Birthday Book, based on astrology. The readings about personality are specific to the actual day. It's just for fun, but it's pretty uncanny in most cases. HOWEVER, I knew a girl that shared my birthday, and she's one of the few people in this world that I would say I hated if I really thought I actively hated people. I don't care for her at all, and prefer to pretend she does not exist.