Maha Navami 2022: Maha Navami is the ninth and last day of auspicious Navratri. It falls on Navami Tithi of Shukla Paksha in Ashwina Month. Maa Siddhidatri, ninth form of Maa Durga is worshipped on this day. Maha Navami is going to be observed on 4th October, 2022.