Durga Navami is observed on the 9th day of Navratri, final day of Navratri Durga Puja. In 2014, Durga Navami date is October 3 in Ashwin Navratri. Siddhidatri Navdurga Puja (Siddhidayini Maa Poojan) is the main ritual of Durga Navami. In Chaitra Navratri Siddhidhatri Puja date (Durga Navami) is on April 8.
Mahishasura Mardhini Durga, Matangi Dashamahavidya and Mukteshwari Matruka are also worshipped with shodashopachar (16 steps of Hindu Puja) in various places of India.
Durga Navami concludes the 9-day Navratri Vrat. Triratri Vrata also ends on this day.