Today is my birth year birthday. I was born in 1958, and today I turn 58 years old. I was only recently acquainted with this special birthday and decided it was a random reason to do a little thinking. (Apparently there’s also a “golden” birthday, which happens when your birthday falls on the day of your birth [i.e. if you were born on a Thursday, every birthday that falls on Thursday is golden.] I think. If you know it’s different, please comment!) But only the birth year birthday happens once in a lifetime.