The 16th birthday is a mark that a girl has come of age. She is not a legal adult yet, but 16 is when many girls learn to drive, can get jobs, and assume other adult responsibilities. Their 16th birthdays are just as important as first dates, proms, graduations, and moving out of their parent's homes. Many girls think of their 16th birthdays as women think of their weddings, giving them intense personal importance.