While X-Men: Days of Future Past's opening night might not have set a record for best opening night this year, box office experts are rapidly raising their projections for the opening weekend box office of X-Men: Days of Future Past. Early projections had pegged X-Men: Days Of Future Past for between a $100 million to $120 million opening over the four day Memorial day weekend. However, now most are projecting that the film will do $120 million at a minimum with the most optimistic projections going even higher. On the conservative side, Box Office Mojo is projecting a $119 million four-day take. On the more optimistic side, Forbes suggests X-Men: Days of Future Past could do $165 million if the film follows the trend of X-Men: The Last Stand. However, they also admit such a high number is not likely. What is causing the rising opening weekend projections? One big thing is that even though X-Men: Days of Future Past's opening night box office was only fourth this year so far, the film had later night openings than the films that finished ahead of it. However, the biggest reason behind the rising projections seems to be because the film is getting phenomenal reviews from both critics and audiences. X-Men: Days of Future Past has the highest review rating of the year so far for any comic book movie on Rotten Tomatoes, which is impressive considering how strong the reviews were for Captain America: The Winter Soldier. So where do we think X-Men: Days of Future Past's opening weekend box office will fall? Our prediction is around a $135 million haul over the four day weekend. Weigh in with your own predictions in the comments below.