With 30 Years to Prepare, Here’s How Brands Celebrated Back to the Future Day

The future wasn't easy to predict, but most of these tweets were

Prepare for the imminent arrival of tweets 30 years in the making.

Today is Oct. 21, 2015, otherwise known as Back to the Future Day, the day Marty McFly and Doc Brown arrive in the present straight from the 1980s.

It's also the culmination of a month of brands taking advantage of the hype surrounding the occasion. Pepsi invented a real-life, limited-edition Pepsi Perfect. Toyota reunited Christopher Lloyd (Doc) and Michael J. Fox (Marty McFly) in a five-minute spot for its "Fueled by Everything" campaign.

Brands have been quick to hop on the social hoverboard, using a variety of hyped-up hashtags like #BackToTheFuture and #BackToTheFutureDay. Even the White House is taking part, with a Google+ Hangout about time travel. Other contributions—Olive Garden's, for instance—were more stale than 30-year-old breadsticks (no matter how bottomless). Even NASA's Curiosity Rover participated from a place even a DeLorean couldn't get to.