Calan Gaeaf

On Nos Galan Gaeaf, women and children would dance around a bonfire and everyone would write their names on, or otherwise mark, rocks and place them in and around said fire. When the fire started to die out,[4] they would all run home, believing if they stayed, Yr Hwch Ddu Gwta (a bad omen that took the form of a tailless black sow with a headless woman) or Y Ladi Wen ("the white lady", a ghostly apparition often said to be headless) would chase them or devour their souls.[5]

One particular rhyme shows how the last child out on Nos Calan Gaeaf was at risk of being eaten by the fearsome beast:[4]

The following morning, all the stones containing villagers' names would be checked, and finding one's stone burned clean was believed to be good luck. If, however, a stone was missing, the person who wrote their name on the absent stone would be believed to die within one year.[4]

Calan Gaeaf is a harvest festival and many games would be played involving the harvest. When the last corn stalk was harvested, workers would leave a few stalks uncut and then play a game with the uncut stalks to see who could reap them. Once the final corn stalks were cut, the stalks were twisted into something called a "harvest mare." The winner would stuff the harvest mare inside his clothing and try to sneak it into the house while the women worked on the feast. If the reaper successfully got the harvest mare into the house, he was given beer and a place of honour at the table, while the mare was hung above the hearth. If he was unsuccessful, he was mocked.

After the harvest was gathered and the livestock was slaughtered, a large feast would be held that was cooked by all of the women in the village.

The boys were instructed to cut 10 leaves of ivy, throw one away and put the other nine under their pillows. Apparently, this allowed the boys to see the future, and if they touched the ivy then they could see witches while asleep.

The girls were instructed to grow a rose in the shape of a large hoop, go through the circle three times prior to cutting a rose, and then place the rose under their pillow. This allowed the girls to see into the future.

Unmarried women were instructed to darken their rooms during Nos Calan Gaeaf, and then a married woman could look into the mirror to see the face of the future groom. If a skull appeared in the mirror, the unmarried woman was meant to die within the year. If a future groom could not be seen, unmarried women were instructed to peel an apple and throw the skin over their shoulders. Apparently, the shape the apple skin made would show the first initial of her future husband.

• Coelcerth: Families build a fire and place stones with their names on it. The person whose stone is missing the next morning would die within the year.
• Yr Hwch Ddu Gwta: A fearsome spirit in the form of a tail-less black sow who roamed the countryside with a headless woman.
• Twco Fala: Apple bobbing