Fourth Day Of Durga Puja Festival Is Celebrated As Maha Navami. This Year Maha Navami Will Fall On October 23. Maha Navami Marks The Day When Goddess Durga Killed Buffalo Demon Mahishasura. On This Day, Maa Shakti Is Worshipped As Mahishasuramardini. To Celebrate This Auspicious Day, Download Happy Maha Navami Wallpapers And Send Happy Maha Navami Wishes And Messages To Your Loved Ones.