What is 21 year old date?

As an AI language model, I do not have personal information about individuals. However, a 21-year-old date refers to a date with an individual who is 21 years of age. It is important to note that the legal drinking age in the United States is 21 years, which means that most establishments that serve alcohol may require proof of age before serving. It is also worth noting that at 21, the individual is considered an adult and can vote, buy cigarettes, and purchase firearms in some states.