Goddess Mahagauri is the eight form of Nav Durga and worshipped on the day eight of navratri. The day is also called Durga Ashtami. Many people in India do the Kanya Poojan on day eight or day nine. Devi Mahagauri has a very fair complexion, thus called Mahagauri. Maha means 'very' and gauri means 'the fair'.