Navratri ("Nav" meaning nine and "Ratri" meaning nights), These nights are devoted to the reverence of Goddess Durga (Maa Durga) who exists in many forms and is the manifestation of the absolute energy that pervades the Universe. During these days and nights prayers are offered to Mother Goddess. For the devout these days are the sacrosanct for it is during these days when Goddess Durga takes a stock of her devotees and grants all blessings, removes ills and evils and ensures unproblematic life for her devotees.
Navratri's each night is dedicated to one form of Goddess Durga. That is every ratri of the Navratri corresponds to worship of different forms of Maa Durga.