Spoiler alert? According to this article, Season 11 of The X-Files will be set two years after the events of Season 10.
"What will Season 11 be about?source: The Sun
Fox are typically keeping their cards close to the chest as to what will happen in Season 11, but events will take place two years after season 10.In the series finale, Mulder’s life was left hanging in the balance as he succumbed to a deadly virus, but in the final moments, a triangle-shaped UFO shone a bright light over him, Scully and Miller.The episode ended with Scully looking at the lights of the spacecraft."
Although I tend to think they are only making a reference to the two years that passed between the last episode we saw in 2016 and the announcement that new season will premiere in 2018. What do you think? Unless we have a more reliable source, trust no one!