The arrival of Planet X is scheduled for May 2003.
Nancy Leider (the one who invented that planet) had claimed she was abducted by aliens (from Zeta Reticuli) who implanted a special receiver inside her brain - a receiver that, of course, could not be detected by human means.
They then warned her that a rogue planet was going to cross our Solar system (rogue = not in orbit around our Sun), and kill over 90% of us as it passed too close to Earth and then settle in an orbit exactly between us and the Sun, in May 2003.
The hoaxers who used Nancy's planet even managed to sell survival kits and tickets to board spacecraft that were going to be sent here by the aliens. (This is what gave Rolland the idea for the Arks, because the movie "2012" was based a lot on the 2003 end-of-the-world).
The bunkers were already being built for THAT end of the world (2003). Some still exist.
Planet X was combined with Nibiru (a fictitious planet, invented for a story published around 1971) for the Big 2012 Hoax (the so-called Mayan calendar end-of-the-world).
Planet X has been causing the end of the world every year since then.
I'm sure it will continue for many years to come.
It is one of these "aternative facts".