Date of Birth

Well, today is my Birthday and it's strange that I'm even writing this.  I'm one of those people who generally does not discuss his birthday, or plan anything for his birthday or really like people making any kind of deal about his birthday.  I do appreciate the well wishes and greetings, don't get me wrong.  That is very nice of everyone to do, but beyond that, there is no need of anything; gifts or otherwise.  Even the greetings isn't necessary cuz I'm the type that would like to consider it just another day, ya know?  Not sure why I'm like that or when it started, but that's how I feel.

I am curious however, (and this I guess is the reason why I even talk about my birthday) if there is some metaphysical, astrological, quantum physics related meaning behind the reverse of your day of birth.  I'm fairly positive that when the age you turn is your day of birth, it's called a Star Birthday (like turning 13 for me) but is there one for the reverse?  I'm not even sure what the supposed meaning behind a Star Birth day, but if there's a reverse one as well, that is what today would be, as I turned 31.  Does that mean anything...?

Well, besides that I'm older...