Great Scott! It's Back to the Future Day

Back to the Future 2Universal Pictures

Today is Back to the Future Day. Social media and movie fans worldwide are celebrating 21 October 2015 which is the date Marty McFly and Doc Brown visited in the 1989 sci-fi time adventure sequel Back to the Future II.

#BackToTheFuture and #bttf are trending on social media sites. Fans are discussing the cult film on Facebook and Twitter.

HoverboardUniversal Pictures

Savvy brands have rolled out gadgets and gimmicks by tapping into the interest in the movie trilogy. We have rounded up some of the best social media reactions and some of your pictures.

Even the British Prime Minister, David Cameron, has tried to use Back to the Future to make a jibe at his opponent, Jeremy Corbyn:

Tweet: Cameron just did the inevitable Back To The Future joke "Corbyn should get in his DeLorean, go back to 1985, and stay there" #PMQs@greg_jenner

Look what we dug up from the archives! Although technically today is about Back to the Future II, the BBC Archives have reminded us of Film 85 presenter Barry Norman sharing his verdict on Back to the Future - the first - when it was first released in 1985.

Tweet: No hoverboards or flying cars? Oh well. Here's what critic Barry Norman made of the original #BackToTheFuture film@BBCArchive

The London Fire Brigade has used the Back to the Future Day to warn owners of self-balancing scooters - also known as 'hoverboards' not to leave them charging unattended after two 'hoverboards' burst into flames recently.

The aftermath of a 'hoverboard' fireLFB

Great Scott! Ayrshire Police in Scotland said they received reports of "a suspicious vehicle causing concern".

Facebook: PAST ARRIVES IN AYRSHIRE. About 0728 hours today, Wednesday 21st October 2015, police received reports of a suspicious vehicle causing concern in the car park of an Irvine supermarket. Witnesses report the stainless steel DeLorean vehicle to have been damaged and two men to have been within the vehicle. One man is described as being around 17 years old, slim build with dark hair while the other is only described as being older with grey hair and wearing a white coat. A spokesperson for Ayrshire Police Division commented "on arriving at the location the vehicle almost collided with two members of the public on hover boards. Luckily the hover board' collision avoidance system prevented any injuries. We are keen to speak with the two men seen within the vehicle."Ayrshire Police Division

Queensland Police released a spoof statement about its new "hoverboard unit".

Queensland police ride "hoverboards" in image released to the mediaQueensland Police

Richmond Police Station in south west London tweeted that anyone who wants to emulate Marty McFly's driving antics could find themselves on the wrong side of the law.

Tweet: Anyone travelling at 88mph hitting a pole, causing power cut & stopping the town clock will likely receive a fine & points! #BackToTheFuture@MPSRichmond

Even the Department of Work and Pensions got in on the act with a tweet reminding people about workplace pension.

Tweet: '‘Pensions? Where we’re going we don’t need pensions…’ #DontIgnoreIt #BackToTheFuture http://www.workplacepensions.gov.uk/"@dwppressofice

Jeremy Gogan, from Jersey, shared us the picture of his Back to Future memorabilia with us. He said he will sit down with his children this evening to watch the "best movie of all time".

A Back to the Future boxset, Marty McFly's trainers and a toy model of the DeLorean carJeremy Gogan

Joey Uzo spotted this iconic DeLorean car on his way back from a late lunch break. He pulled out his camera and "took a couple of snaps."

A little girl looks at the DeLorean vehicleJoey Uzo
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Let us know how you'll be celebrating Back to the Future Day. How have the films influenced your life? Do you drive a DeLorean?! Share your stories by emailing haveyoursay@bbc.co.uk.

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