Shivararti
From BiblePortal Wikipedia
Shivararti [1]
in Hindu mythology, is a festival celebrated in the month of March in honor of Siva, in which the grossest indecencies. accompanied with lascivious songs, are publicly perpetrated without shocking or offending observers, since everything of the kind is regarded as highly pleasing to the god. The Linga (q.v.), Siva's most eminent symbol, is preferably dedicated and sold at this festival.