On Christmas Eve in some parts of the Esthonian island of Oesel they bake a long cake with the two ends turned up. It is called the Christmas Boar, and stands on the table till the morning of New Year’s Day, when it is distributed among the cattle. In other parts of the island the Christmas Boar is not a cake but a little pig born in March, which the housewife fattens secretly, often without the knowledge of the other members of the family. On Christmas Eve the little pig is secretly killed, then roasted in the oven, and set on the table standing on all fours, where it remains in this posture for several days. In other parts of the island, again, though the Christmas cake has neither the name nor the shape of a boar, it is kept till the New Year, when half of it is divided among all the members and all the quadrupeds of the family. The other half of the cake is kept till sowing-time comes round, when it is similarly distributed in the morning among human beings and beasts. In other parts of Esthonia, again, the Christmas Boar, as it is called, is baked of the first rye cut at harvest; it has a conical shape and a cross is impressed on it with a pig’s bone or a key, or three dints are made in it with a buckle or a piece of charcoal. It stands with a light beside it on the table all through the festal season. On New Year’s Day and Epiphany, before sunrise, a little of the cake is crumbled with salt and given to the cattle. The rest is kept till the day when the cattle are driven out to pasture for the first time in spring. It is then put in the herdsman’s bag, and at evening is divided among the cattle to guard them from magic and harm. In some places the Christmas Boar is partaken of by farm-servants and cattle at the time of the barley sowing, for the purpose of thereby producing a heavier crop.
From Sir James George Frazer’s The Golden Bough.