My great aunt Lil is unsure of her age and her birthday. This has nothing to do with any infirmity often associated with old age, as she has her full wits about her. It is simply because she doesn't have a birth certificate. She is either 85 or 86, she isn't sure. She grew up poor in Manhattan and family birthday celebrations weren't important due a very simple fact: they didn't have the money to celebrate. Since she doesn't know the date of her birth she now celebrates every year on April 1st. Out of the entire 365 days from which she could choose (366 on a leap year) she choose April Fools day. She's a weird old lady, but my esteem for her rose greatly after learning that little tid bit.