...and the "A.S." dating system.
"A.S." stands for "Anno Satanas", and is Latin for "In The Year of Satan". Below are two excerpts from "The Satanic Bible" that will explain.
St. Walpurgis - or Walpurga, or Walburga, depending upon the time and area in which one is referring to her - was born in Sussex about the end of the Seventh or the beginning of the Eighth Century, and was educated at Winburn, Dorset, where after taking the veil, she remained for twenty-five years. She then, at the instance of her uncle, St. Boniface, and her brother, St. Wilibald, set out along with some other nuns to found religious houses in Germany. Her first settlement was at Bischofsheim in the diocese of Mainz, and two years later (754 A.D.) she became abbess of the Benedictine nunnery at Heidenheim, within her brother Wilibald's diocese of Eichstadt in Bavaria, where another brother, Winebald, had at the same time also been made head of a monastery. On the death of Winebald in 760 she succeeded him in his charge, retaining the superintendence of both houses until her death on February 25, 779. Her relics were translated to Eichstadt, where she was laid in a hollow rock, from which exuded a kind of bituminous oil, afterwards known as Walpurgis oil, regarded as having miraculous efficacy against disease. The cave became a place of pilgrimage, and a great church was built over the spot. She is commemorated at various times, but principally on May 1st, her day taking the place of an earlier Pagan festival. Amazingly enough, all of this rigmarole was found necessary simply to condone the continuance of the most important Pagan festival of the year - the grand climax of the spring equinox!
The Eve of May has been memorialized as the night that all of the demons, specters, afreets, and banshees would come forth and hold their wild revels, symbolizing the fruition of the spring equinox.
...On the last night of April, 1966 - Walpurgisnacht, the most important festival of the believers in witchcraft - LaVey shaved his head in the tradition of ancient executioners and announced the formation of The Church Of Satan. He had seen the need for a church that would recapture man's body and his carnal desires as objects of celebration. "Since worship of fleshly things produces pleasure," he said, "there would then be a temple of glorious indulgence..."
So, I use the "A.S." dating system to celebrate the anniversary of the creation of The Church of Satan and the emergence of above-ground Satanism: the Satanic "Year One" (May 1, 1966 C.E.), and will use it throughout my entire website. Just think of it this way:
Satanic New Year's Eve = April 30 (Walpurgisnacht Eve)
Satanic New Year's Day = May 1 (Walpurgisnacht Day)
For more information about Satanism, go find a copy of "The Satanic Bible", by Anton Szandor LaVey.