October 21, 2015, or as many would call it, Back to the Future Day, has finally arrived, and Apple has decided to have some fun with the day with the help of Siri. As they have done in the past, Apple has created responses for Siri when users talk to her about the event. Go ahead say things like "Happy Back to the Future Day" or "It's Back to the Future Day" to see how Siri will respond.

Back to the Future fun with Siri

For those of you who are unfamiliar, October 21, 2015 is the date that Marty McFly arrived in the future in Back to the Future Part II. Other companies are also getting in on the futuristic fun, with Google "leaking" the plans for a time-traveling car.

Chime in with any more fun Back to the Future responses from Siri in the comments below.