Every day is a big satanic day, anon.
The satanic cults are what happen when hedonists set up an embassy in the land of EdgeLordia and try to convince people that going over the edge is actually okay.
The trick is understanding that edgelordia is not on the edge of the coin, but actually the face. The orders of satanism and orders of holiness are both rather hedonistic and argue for why you make for a good sacrifice.
https://youtu.be/7RFlPmjUbRo