Christian authors have written dozens of anti-Satanic books with lists of Satanic Ritual Days. According to the Ontario Consultants for Religious Tolerance, in some cases the authors appear to reference the works of other conservative Christian writers. Many people, and many satanists, appear to lack major direct knowledge of Satanism and all show a general lack of familiarization with the religion.
In The Edge of Evil "Grand High Climax" is said to be a major holiday celebrated by Satanists on December 24. Evangelical Christian author Jerry Johnston says in this book that it is a celebration meant to juxtapose the Christian holiday of Christmas Eve, when the birth of Jesus Christ is celebrated. However this goal to blaspheme is not always prevalent.
He claims that Grand High Climax is traditionally celebrated with a Black Mass, followed by great excesses of food, drink, sex, and merriment, but a rite called "Grand High Climax", and the details of the activities involved, is not a rite acknowledged by all Satanic groups. It was once part of the Satanic panic and beliefs about the Witches' Sabbath.
- Ross, Colin A. (1995). Satanic ritual abuse: principles of treatment. University of Toronto Press. ISBN 9780802073570. http://books.google.com/books?id=3PkKrgn2CrUC. - satanic holidays mentioned on pp 113–114
- Lewis, James R. (2001). Satanism today: an encyclopedia of religion, folklore, and popular culture. ABC-CLIO. ISBN 9781576072929. http://books.google.com/books?id=dZ4YAAAAIAAJ&pgis=1. p 277 quote: "the two most important Satanic holidays are Halloween and Walpurgisnacht".
- Hatonn, Gyeorgos C 2 (1998). Rise of Antichrist. Phoenix Source Distributors, Inc.. ISBN 9781569351871. p 162, Halloween and May 1-2
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