My nephew was born on New Years Day. They figured he would be born on the 2nd because in the past it took longer for her babies, so I thought it would be easy to remember his birthday, 1/2/03. It still kinda helps but...
My Dad's a Halloween baby, and as kids sis and I thought all the hullabaloo was to celebrate him.
As we told him years later, imagine how impressed we would have been if he'd been born on the 4th of July!