(at around 18 mins) The script called for Logan to wake up in 1973 in boxer shorts. Hugh Jackman vetoed this, in favor of waking nude, saying, "In Australia, if you're next to a really good-looking girl, you're not getting out with boxer shorts on, or briefs, or anything!"

(at around 1h 30 mins) When the Pentagon is shown, the caption says "Washington, DC." though the technical location of The Pentagon is Arlington, Virginia. However, it has been insisted by many that the building is not just close physically, but is very linked to Washington's political and economic culture, that the employees generally think of themselves more as 'Washingtonian' than 'Virginian'. Additionally, at least two official seals (one's in the Pentagon press room) state 'Washington' (or 'Washington DC') at the bottom making the identification not entirely wrong.

SPOILER: There is a scene at the end of the closing credits: a mutant stands in front of a crowd chanting his name, as he telekinetically assembles a pyramid in the air. This leads into X-Men: Apocalypse (2016).

An alternate version of the film has been released on Blu-ray, DVD and digital formats called "X-Men: Days of Future Past: The Rogue Cut." This edition not only includes Rogue's scenes, but there is additional footage as well. I.e. more time in the airport. Hank and Raven have a moment together. Also the final mutant stand in the future is altered by Rogue's presence.

Featured in Film '72: Episode dated 5 March 2014 (2014)