If you’re a “Back to the Future” fan, you’ll recall that Oct. 21, 2015, is Back to the Future Day. That’s the date Marty McFly (Michael J. Fox) and Doc Brown (Christopher Lloyd) time-traveled to in the film’s 1989 sequel, “Back to the Future II.”

Thirty years after the original film’s debut, all sorts of anniversary tributes and tie-ins have been planned, including a new Blu-ray release of the trilogy, special screenings, a new documentary (opening theatrically Nov. 3) and more. For details, check out the official “Back to the Future” site. As part of the 30th anniversary festivities, the Chicago Symphony Orchestra will perform the score of “Back to the Future” — with new material penned for this occasion by composer Alan Silvestri — as the full-length film screens above the stage in a CSO at the Movies concert March 4.

In the meantime, there’s plenty to read about the “Back to the Future” phenomenon:

From USA Today: 15 Things You Probably Didn’t Know About ‘Back to the Future’

From Popular Mechanics: How ‘Back to the Future’ Foresaw the World of 2015

From NBC News: 10 Ways to Celebrate ‘Back to the Future’ Day

From Vox: Back to the Future Day: The Movie’s 2015 Predictions and the Hoax, Explained

From IO9: 11 Incredible Secrets About the Making of ‘Back to the Future’