Maha Navami marks the final victory of Goddess Durga over Mahishasura. It's believed that on this day, the Goddess defeated the demon in her angry form, symbolising the triumph of good over evil. The celebrations on Maha Navami begin with Mahasnan, a ceremonial bathing ritual, followed by Shodashopachar Puja, which consists of sixteen types of offerings made to the Goddess.