Thanks to @TheProxyGuy and @MadtownLems, this site will tell you, based on Gatherer ID number, what MTG card goes with your birthday. Here's mine:
Hmm, seems being born outside the USA would be strictly better in this case (at least financially). My son's cards were no better (they were, in fact, worse), but my wife hit the jackpot:
Sure, it doesn't actually mean anything, but it's good, clean fun. What's your MTG BirthCard?