The first and most prominent day during the navratri is the day of Shailaputri Devi. Shaila means mountains and putri means daughter which gives the meaning daughter of mountains. She is the first form amongst the nine forms of goddess Parvati – variously known as Sati Bhavani, Parvati or Hemavati, the daughter of Hemavana – the king of the Himalayas. She is the consort of Lord Shiva and also the mother of Ganesha and Kartike.
The representation of the powers of Brahma, Vishnu and Shiva, she rides a bull and carries a trident and has a lotus flower in her two hands. She was the daughter of Daksh in her previous birth. She married Lord Shiva but father Daksh wasn’t in favour of their marriage. Once, Daksh had organized a big yagna and invited all but deliberately did not invite Lord Shiva. Sati was stubborn and headstrong which made her reach there. Daksh insulted Lord Shiva there. Sati couldn’t take the insult of her husband Lord Shiva and she burnt herself in the fire of yagna. In the next birth, she was named Parvati. She was the daughter of Himalaya and she got married to Lord Shiva. Devotees believe that those who pray to her and have strong faith in her, she blesses them and grants them whatever they wish for.
One must wear yellow colour on this day.Navratri First Day - Worship Shailaputri Devi by Acharya Dharam Shastri