In college I read this book about how certain birthdays matched well with other's for relationships, I didn't pull it out to decide if I should date Jeremy, but I did like reading just for interest way back in the day.
A few months ago I stumbled upon a book at the store that had information about a person based on their birthday that wasn't based on all that astronomy mumbo jumbo. It was done as a survey of thousands of people (20,000) and just gave what common traits were shared with people born on that day, not the junk you find in the paper that you have no clue how it came to be.
I was intrigued at just how accurate it was about my personality.