If Vikings were here today, the sounding of a distinctive horn in York would have created chaos.
The ancient instrument, blown last night, signalled exactly 100 days until the end of the world, according to Norse mythology.
Legend has it that the Norse God, Heimdallr, would blow the mythical Gjallerhorn to warn of the Viking apocalypse, also known as 'Ragnarok'.
Ragnarok, which translates to ?Doom of the Gods?, is due to be preceded by the winter of winters.
Vikings believed, prior to the apocalypse, three freezing winters would follow each other with no summers in between.
All morality would disappear and fights would break out all over the world, signalling the beginning of the end.
The wolf Skoll would devour the sun, and his brother Hati would eat the moon, causing stars to vanish from the sky and the Earth to be thrown into eternal darkness. Norse mythology experts have calculated that Vikings believed this will take place on February 22, 2014.
On this day, the god Odin will be killed by the wolf Fenrir and the other ?creator? gods.
There will be huge earthquakes, the sea will rear up and the soil and the sky will be stained with poison.
The sound of the horn is supposed to call the sons of Odin to the battlefield, where Odin will ultimately be killed.
After his death, the Earth was foretold to sink into the sea, paving the way for a new utopian world with endless supplies.
