The Samhain celebrations have survived in several guises as a festival dedicated to the harvest and the dead. In Ireland and Scotland, the Féile na Marbh, the 'festival of the dead' took place on Samhain.
The night of Samhain, in Irish, Oíche Shamhna and Scots Gaelic, Oidhche Shamhna, is one of the principal festivals of the Celtic calendar, and falls on the 31st of October. It represents the final harvest. In modern Ireland and Scotland, the name by which Halloween is known in the Gaelic language is still Oíche/Oidhche Shamhna. It is still the custom in some areas to set a place for the dead at the Samhain feast, and to tell tales of the ancestors on that night.[1][3][5]
Traditionally, Samhain was time to take stock of the herds and grain supplies, and decide which animals would need to be slaughtered in order for the people and livestock to survive the winter. This custom is still observed by many who farm and raise livestock.[1][3][5]
Bonfires played a large part in the festivities celebrated down through the last several centuries, and up through the present day in some rural areas of the Celtic nations and the diaspora. Villagers were said to have cast the bones of the slaughtered cattle upon the flames. In the pre-Christian Gaelic world, cattle were the primary unit of currency and the center of agricultural and pastoral life. Samhain was the traditional time for slaughter, for preparing stores of meat and grain to last through the coming winter. The word 'bonfire', or 'bonefire' is a direct translation of the Gaelic tine cnámh. With the bonfire ablaze, the villagers extinguished all other fires. Each family then solemnly lit its hearth from the common flame, thus bonding the families of the village together. Often two bonfires would be built side by side, and the people would walk between the fires as a ritual of purification. Sometimes the cattle and other livestock would be driven between the fires, as well.[1][3][5]
Divination, usually involving apples and nuts, is a common folkloric practice that has also survived in rural areas. The most common uses were to determine the identity of one's future spouse, the location of one's future home, and how many children a person might have. Children would also chase crows and divine some of these things from the direction the birds flew.[1][3][5][6]
In parts of western Brittany, Samhain is still heralded by the baking of kornigou, cakes baked in the shape of antlers to commemorate thegod of winter shedding his 'cuckold' horns as he returns to his kingdom in the Otherworld. The Romans identified Samhain with their own feast of the dead, the Lemuria. This, however, was observed in the days leading up to May 13. With Christianization, the festival in November (not the Roman festival in May) became All Hallows' Day on November 1st followed by All Souls' Day, on November 2nd. Over time, the night of October 31 came to be called All Hallow's Eve, and the remnants festival dedicated to the dead eventually morphed into the secular holiday known as Halloween.