All nine forms of Goddess Durga are worshipped during Maha Ashtami Puja.
Young unmarried girls, being treated as Goddess Durga itself, are also worshipped on Maha Ashtami. Worshipping of young girls during Durga Puja is known as Kumari Puja. In many regions Kumari Puja is done during all nine days of Durga Navratri. Kumari Puja on a single day during Durga Puja is preferred on Maha Ashtami.