In 1986, Bill Drummond was an established figure within the British music industry, having co-founded Zoo Records, played guitar in the Liverpool band Big in Japan, and worked as manager of Echo & the Bunnymen and the Teardrop Explodes. On 21 July of that year, he resigned from his position as an A&R man at record label WEA, citing that he was nearly 33 1/3 years old (33 1/3 revolutions per minute being significant to Drummond as the speed at which a vinyl LP revolves), and that it was "time for a revolution in my life. There is a mountain to climb the hard way, and I want to see the world from the top". He released a well-received solo LP, The Man, judged by reviewers as "tastefully understated," a "touching if idiosyncratic biographical statement" encapsulating "his bizarrely sage ruminations", and "a work of humble genius: the best kind". Artist and musician Jimmy Cauty was, in 1986, the guitarist in the commercially unsuccessful three-piece Brilliant--an act that Drummond had signed to WEA Records and managed. Cauty and Drummond shared an interest in the esoteric conspiracy novels The Illuminatus! Trilogy and, in particular, their theme of Discordianism, a form of post-modern anarchism. As an art student in Liverpool, Drummond had been involved with the set design for the first stage production of The Illuminatus! Trilogy, a 12-hour performance which opened in Liverpool on 23 November 1976. Re-reading Illuminatus! in late 1986, and influenced by hip-hop, Drummond felt inspired to react against what he perceived to be the stagnant soundscape of popular music. Recalling that moment in a later radio interview, Drummond said that the plan came to him in an instant: he would form a hip-hop band with former colleague Jimmy Cauty, and they would be called the Justified Ancients of Mu Mu. It was New Year's Day ... 1987. I was at home with my parents, I was going for a walk in the morning, it was, like, bright blue sky, and I thought "I'm going to make a hip-hop record. Who can I make a hip-hop record with?". I wasn't brave enough to go and do it myself, 'cause, although I can play the guitar, and I can knock out a few things on the piano, I knew nothing, personally, about the technology. And, I thought, I knew [Jimmy], I knew he was a like spirit, we share similar tastes and backgrounds in music and things. So I phoned him up that day and said "Let's form a band called The Justified Ancients of Mu-Mu". And he knew exactly, to coin a phrase, "where I was coming from". And within a week we had recorded our first single which was called "All You Need Is Love".

Answer this question "When did they form?" by extracting the answer from the text above.
In 1986,