Remember the famous expression: "Karachun has come", which means that something really bad has come or has happened? You will probably be surprised, but Karachun is not WHAT, but WHO. Yes, that's exactly what they call one of the characters of ancient Slavic mythology. This is known for sure, but further the opinions of Slavic scholars diverge.
Some consider him an underground god, lord of frost, master of darkness, cold and death. Others say that this is one of the hypostases of Chernobog (the god of failures) or Perun (the god of lightning), or even Veles (the animal god), and still others made Krachun an independent character who spends the summer in the Underworld, and in winter he comes to the surface or gives teams from underground. Sometimes they call him the husband of the goddess of the night and death, Morena, and the son of Veles.
But the most interesting thing will begin when you read how the folklore describes Karachun.
With the beginning of winter, Karachun walks around at night with his retinue and sends bitter frosts. This is an angry gray-bearded old man in a blue caftan with white trim and a winter hat. In his hands he holds a staff, which freezes everything around.
Superstitious farmers feared and revered Karachun, honoring this god, according to one source - on December 23-25, when the winter solstice ends and the night becomes shorter than the day (there is a version that the name Karachun means shortening (night), according to other sources - by 21- December 22 - the days of the winter solstice.
Well, now you, dear readers, of course have already guessed that Karachun is none other than Grandfather Frost, well-known and beloved by children. Over time, the Slavic gods were replaced by Christianity, but the beliefs of the people in some of them remained, eventually migrating into fairy-tale characters.