Supposedly a group called the Norvik (or maybe Jorvik) Viking Center has decided that we're in the midst of Fimbulwinter* (the winter to end all winters) which precedes Ragnarok, the battle in which the major Norse Gods all get wiped out by the Fire and Ice giants.
* a massive global cold snap, which really isn't happening
[ Don't tell Thor, because he's currently doing great business at the box office. ]
But anyway, this apparently has been foretold on the basis of solar activity (we're having a lower-than-normal solar max) and a couple of oarfish that washed up on the beach in California.
Seriously. Or maybe not.
"The Jorvik Viking Centre predicted that Ragnarok would occur on 22 February because this is the end of the feast of Jolablot.
While not a scientific conclusion, they claim that Vikings loved to feast and wouldn't want to miss this event. For this reason, they argue that Vikings would believe the world would end in 100 days.
The end of the world is coincidentally the start of the grand finale of the Viking festival in York."
Well, since I think that this pseudoscientific prediction is unlikely to happen, but they can always make the same prediction before next year's Viking festival.