In 1989 Dr. Emmet "Doc" Brown and Marty McFly traveled to this day in the future in the DeLorean time machine.
Where are our pink hoverboards?
Marty McFly: Where are we? When are we?
Doc: We're descending toward Hill Valley, California, at 4:29 pm, on Wednesday, October 21st, 2015.
Marty McFly: 2015? You mean we're in the future?
Jennifer: Future? Marty, what do you mean? How can we be in the future?
Marty McFly: Uh, Jennifer, um, I don't know how to tell you this, but I... you're in a time machine.
Jennifer: And this is the year '2015'?
Doc: October 21st, 2015.