Enter your birthday in any format:
         yyyymmdd
         yyyyddmm
         yymmdd (unless your birthday is between 1900 and 1909, or since 2000)
         yyddmm (unless your birthday is between 1900 and 1909, or since 2000)
         ddmmyyyy (unless your birthday is before the 10th of the month)
         mmddyyyy (unless your birthday is between January and September)
         ddmmyy (unless your birthday is before the 10th of the month)
         mmddyy (unless your birthday is between January and September)