Lord Shri Hari Vishnu, who is called the sustainer of the universe. And on this auspicious occasion of Krishna's birthday, this day is celebrated as Janmashtami.
Goddess Durga was created to fight the evil demon Mahishasura. Lord Brahma, Vishnu, and Shiva combined their powers to construct the powerful Goddess Maa Durga to kill Mahishasura, who troubled humanity on earth and the gods in heaven.