Samhain (pronounced: sow-win) is one of the eight annual festivals, often referred to as ‘Sabbats’, observed as part of the Wiccan Wheel of the Year. It is considered by most Wiccans to be the most important of the four ‘greater Sabbats’. It is generally observed on October 31 in the Northern Hemisphere, starting at sundown. Samhain is considered by some Wiccans as a time to celebrate the lives of those who have passed on, and it often involves paying respect to ancestors, family members, elders of the faith, friends, pets and other loved ones who have died. In some rituals the spirits of the departed are invited to attend the festivities.
According to Celtic lore, Samhain is a time when the boundaries between the world of the living and the world of the dead become thinner, allowing spirits and other supernatural entities to pass between the worlds to socialize with humans. It is the time of the year when ancestors and other departed souls are especially honored.