“To many ancient people, the waning of the light signaled death. For example, in Welsh mythology, this is the day of the year when the God of Darkness, Goronwy, defeats the God of Light, Llew, and takes his place as King of the world. To this day in Japan, the equinox is celebrated by visits to the graves of family members, at which time offerings of flowers and food are made and incense is burned. The three days preceding and following the equinox are called “higan,” or the “Other side of the River of Death.”
– September Folklore
Witches Of The Craft® 