Have you tried using google? If so, and you still haven't found it, I'd try using the ATS Search feature. I'll take a look around for you, because
it seems like I remember reading something, somewhere, about this.
You may me astrology.. Which basically says that there is a corrolation between the dates people were born on (which connects to the stars) and their
personalities. Usually, you see horoscopes in newspapers and magazine, but they tend to make a mockery of the subject...
Through my experience there are alot of connections between personalities and dates of birth, but like most of the Paranormal.. Nothing is set in
stone..