According to a new casting call for X-Men: Days of Future Past, the sequel is jumping forward in time more than a decade: While X-Men: First Class is set in 1962, this film seems to be taking place primarily in 1973.

The casting call, which comes courtesy of Comic Book Movie, indicates that some of the Days of Future Past shoot will take place in Montreal from April to August, and that the look the production is casting for is 1973, because "most of the film takes place in 1973." Apparently we'll be seeing a lot of sideburns, mustaches and beards.

This news aligns itself with something First Class director Matthew Vaughn indicated before that film's 2011 release, when he raised the likelihood of the sequels jumping forward in time.

“1962 is far more grounded in the world of the ’50s,” he said. “I think it takes about five years for a decade to really start getting its identity, so the fun thing about this for me would be doing [a sequel] in the latter part of the decade, where you’ve got The Stones, The Beatles, Flower Power …”

Singer, who was then only a producer, added, “That’s an idea that’s been discussed. How the characters go through time. But only to a point -- they can’t age too fast!”

If that's the case, then some of the slightly older characters -- like Rose Byrne's Moira or January Jones' Emma Frost -- might not have a place in this movie. After all, it's easier to age up people like James McAvoy and Michael Fassbender than it is those two, who were already supposed to be older than the new X-Men. At least this elaborates what Singer told Empire recently about the way he's crafting this sequel.

“I’m taking into account every movie – I’m not just grabbing my first two movies and First Class and smashing them together,” he said. “I’m taking into account the entire universe as it’s been laid out so far on the screen, and really respecting it and trying to work with that. People took things in various directions, so there’s some clean-up. But ultimately I’m not just ignoring them either.”

The 1981 Days of Future Past story by Chris Claremont and John Byrne, which appeared in The Uncanny X-Men #141-142, depicts a timeline created by the X-Men’s failure to prevent the Brotherhood of Evil Mutants from assassinating a U.S. senator. In that alternate future, the giant robotic Sentinels have become the de facto rulers of the United States, where mutants are hunted down and placed in internment camps.

The film brings together original X-Men stars Patrick Stewart, Ian McKellen, Hugh Jackman, Anna Paquin, Ellen Page and Shawn Ashmore with First Class actors James McAvoy, Michael Fassbender, Jennifer Lawrence and Nicholas Hoult. It’s due in theaters July 18, 2014.