Samhain (Scots Gaelic: Samhuinn) literally means gsummer's end.h In Scotland and Ireland, Halloween is known as The Shamhna, while in Wales it is Nos Calan Gaeaf, the eve of the winter's calend, or first. With the rise of Christianity, Samhain was changed to Hallowmas, or All Saints' Day, to commemorate the souls of the blessed dead who had been canonized that year, so the night before became popularly known as Halloween, All Hallows Eve, or Hollantide. November 2nd became All Souls Day, when prayers were to be offered to the souls of all who the departed and those who were waiting in Purgatory for entry into Heaven. Throughout the centuries, pagan and Christian beliefs intertwine in a gallimaufry of celebrations from Oct 31st through November 5th, all of which appear both to challenge the ascendancy of the dark and to revel in its mystery.
In the country year, Samhain marked the first day of winter, when the herders led the cattle and sheep down from their summer hillside pastures to the shelter of stable and byre. The hay that would feed them during the winter must be stored in sturdy thatched ricks, tied down securely against storms. Those destined for the table were slaughtered, after being ritually devoted to the gods in pagan times. All the harvest must be gathered in -- barley, oats, wheat, turnips, and apples -- for come November, the faeries would blast every growing plant with their breath, blighting any nuts and berries remaining on the hedgerows. Peat and wood for winter fires were stacked high by the hearth. It was a joyous time of family reunion, when all members of the household worked together baking, salting meat, and making preserves for the winter feasts to come. The endless horizons of summer gave way to a warm, dim and often smoky room; the symphony of summer sounds was replaced by a counterpoint of voices, young and old, human and animal.
In early Ireland, people gathered at the ritual centers of the tribes, for Samhain was the principal calendar feast of the year. The greatest assembly was the 'Feast of Tara,' focusing on the royal seat of the High King as the heart of the sacred land, the point of conception for the new year. In every household throughout the country, hearth-fires were extinguished. All waited for the Druids to light the new fire of the year -- not at Tara, but at Tlachtga, a hill twelve miles to the north-west. It marked the burial-place of Tlachtga, daughter of the great druid Mogh Ruith, who may once have been a goddess in her own right in a former age.
At at all the turning points of the Celtic year, the gods drew near to Earth at Samhain, so many sacrifices and gifts were offered up in thanksgiving for the harvest. Personal prayers in the form of objects symbolizing the wishes of supplicants or ailments to be healed were cast into the fire, and at the end of the ceremonies, brands were lit from the great fire of Tara to re-kindle all the home fires of the tribe, as at Beltane. As they received the flame that marked this time of beginnings, people surely felt a sense of the kindling of new dreams, projects and hopes for the year to come.
http://www.celticspirit.org/samhain.htmDivination at Halloween
Samhain was a significant time for divination, perhaps even more so than May or Midsummerfs Eve, because this was the chief of the three Spirit Nights. Divination customs and games frequently featured apples and nuts from the recent harvest, and candles played an important part in adding atmosphere to the mysteries. In Scotland, a child born at Samhain was said to be gifted with an dEshealladh, gThe Two Sightsh commonly known as gsecond sight,h or clairvoyance.