Samantha Grossman @sam_grossman on Time.com To celebrate Back to the Future Day, also known as the date Marty McFly traveled to in Back to the Future Part II, Michael J. Fox, who played McFly, revealed a picture of himself wearing a real-life version of the franchise’s iconic self lacing shoes, some great looking Nike sneakers: This is real. This is today. Coming spring 2016. cc: @RealMikeFox @Nike pic.twitter.com/KPswXNojvA — michaeljfox.org (@MichaelJFoxOrg) October 21, 2015 Fox also tweeted a photo of a hand-written letter from Nike designer Tinker Hatfield, which says Nike is proud to make the legendary Air Mag sneakers a…