...the time, according to folklore and myth, when the borders between the worlds grow thin, transparent, and permeable; when the dead return, and faeries ride the hills, and the twilight shimmers with ancestral magic.
The name Halloween is shortened from All Hallows' Eve, since it is the eve of All Hallows' Day (also known as All Saints' Day). Next, on November 1st we celebrate the actual feast of All Saints -- this includes all the Saints that have not been canonized and are unknown to us. Then, on November 2nd, we celebrate the feast of All Souls. This day is officially set aside to remember and pray for the poor souls in Purgatory.