Once in a blue moon

I was born during a blue moon. Apparently, they are quite rare, and only happen once in a,... well, blue moon. Though they have had many definitions over the years, the easiest definition is that a blue moon is the second full moon of any given month. Since the average lunar cycle is 29.5 days (I took some pre-natal astronomy classes in the womb), they are pretty rare. In fact, they happen once every two and a half years on average and are generally considered good luck. So I got that going for me,... which is nice.