Movie fans celebrating Back to the Future Day

Published October 21, 2019 10:18am EDT

Three years ago on Monday, Marty McFly and Doc Brown traveled "back" to Oct. 21, 2015 in "Back to the Future Part II."

While the exact date to celebrate this holiday is in the past, many fans still mark the occasion today.

Many are celebrating by watching the classic movie and sharing their favorite scenes on Twitter.

You can join in the fun at #BacktotheFutureDay