Wicca
Wiccans celebrate a variation of Samhain as one of the yearly Sabbats of the Wheel of the Year. It is deemed by most Wiccans to be the most important of the four "greater Sabbats". Samhain is seen by some Wiccans as a time to celebrate the lives of those who have died, 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 dead are invited to attend the festivities. It is seen as a festival of darkness, which is balanced at the opposite point of the wheel by the spring festival of Beltane, which Wiccans celebrate as a festival of light and fertility.
Wiccans believe that at Samhain the veil between this world and the afterlife is at its thinnest point of the whole year, making it easier to communicate with those who have left this world.
Read more about this topic: Samhein, Neopaganism