UFC mixed martial arts event in 2017 UFC 218: Holloway vs. Aldo 2 was a mixed martial arts event produced by the Ultimate Fighting Championship that was held on December 2, 2017, at Little Caesars Arena in Detroit, Michigan. 393,273 views on December 3, 2017 — Wikipedia's most-read article that day. Also most read: Meghan, Duchess of Sussex, Mrs. Doubtfire, Saoirse Ronan, Francis Ngannou. Wiki link