If someone turned 21 on November 2015, what year are they born in?

Thank you ladies for your answers! I'm going to keep this anonymous because I'm embarrassed because I did not know. No, I'm not making a fake ID. I don't drink. Thank you everyone.

How could I use a calculator if I didn't know how to do the math? Thanks to Stacy I now know what to do.

***Look, ladies. I know how to do math. I just didn't KNOW what exactly I needed to do. Stacy showed me and now I know what to do. There's no need to be rude. Some of you are acting like you didn't have trouble with something or didn't know how to do something in your life . It's called learning, my goodness. It's better to learn than not know what to do at all. Thank you ladies that actually helped me.