The Ninth day of Navratri is known as Mahanavmi. It is the last day of Navratri celebration concludes with Saraswati visarjan or Saraswati udyapan. The ninth manifestation of goddess durga is siddhidatri, worshiped on the ninth day of Navratri. This goddess is admired to offer all types of siddhis to her devotees and thus recognized as ‘siddhidatri’. She is always in a happy and charming pose. She has four arms and sits on a lotus. Her arms hold Gada, Chakra, Shankh and Lotus flower. She is the possessor of 26 different wishes (siddhis) which she grants her worshipers. The legend has it that the lord Shiva got all those siddhis by worshipping Maa Shakti. With her gratitude the half body of lord Shiva became that of Maa Shakti, and therefore he was called as Ardhnarisvar.
On Mahanavmi day, kanya pooja is performed, kanya puja is the main ritual observed on Mahanavmi during durga Navratri. In some regions, kanya puja is performed on Durgashtami. Kanya puja is a ritual of worshipping a girl aged between six and twelve symbolizing the kanya kumari form of Durga Devi. Devotees perform the kanya puja in front of the idol of goddess durga. Devotees believe that a kanya is a living replica of the goddess Durga.
The avatar of Maa Durga removes ignorance and provides knowledge to her devotees. Her glory and power are infinite and on the final day (ninth day) of Navratri bestows all siddhis to her devotees and also marks the successful completion of the Navratri celebration.