My whole life, I've shared every birthday cake with my dad since I was born on my father's birthday. My mother tells me, with all the excitement, and my being born so early in the morning that the date slipped their minds until the nurse pointed it out on the hospital forms. Last year, after a very long labor, my daughter was born on my birthday. :D So we now have grandpa, mommy and baby, 3 generations, all on the same day.