De acordo com a esta linha do tempo da Marvel :
Em 1973 :
"Early" scenes of X-Men: Days of Future Past are set.
Mark I Sentinels are created. Between 1973 and 1996, Trask produces 8,732 Mark I Sentinels for the governments of the United States, China, Russia, Israel, Saudi Arabia, France, India and the United Kingdom.
Em 2013 :
The year that "The Wolverine" is set in.
Mark X Sentinels announced.
Em 2015 :
Professor X and Magneto meet Wolverine at an airport.
Em 2023 :
"Future" scene of X-Men: Days of Future Past are set.
Então, efetivamente, X-Men: Dias do Passado Futuro contém cenas de 1973 e 2023 . O cenário de crédito final do Wolverine acontece em 2015 .