Shivratri is celebrated in memory of the divine incarnation of Incorporeal God Shiva. The word ‘Shivaratri’ literally means the night of Shiva. Why is the advent of Shiva is celebrated as the birthnight, and not as birthday? The word “ratri” here does not connote the darkness that falls after sunset, but it signifies the darkness of extreme ignorance and unrighteousness in the world. Ratri or night is the period of dark ness when sins and crimes of all kinds usually take place; when man gropes around for want of clear vision. Thus Shivaratri indicates that God Shiva intervened in the affairs of mankind when utter irreligiousness and unrighteousness prevails shrouding the intellectual horizon of mankind.