Known as Pratipada, this day is associated with Shailaputri (literally "Daughter of Mountain"), an incarnation of Parvati. It is in this form that the Goddess is worshiped as the consort of Shiva; she is depicted as riding the bull, Nandi, with a trishula in her right hand and lotus in her left. Shailaputri is considered to be the direct incarnation of Mahakali. The color of the day is red, which depicts action and vigor.
On Dwitiya, Goddess Brahmacharini, another incarnation of Parvati, is worshiped. In this form, Parvati became Sati, her unmarried self. Brahmacharini is worshiped for emancipation or moksha and endowment of peace and prosperity. Depicted as walking bare feet and holding a japamala and kamandal in her hands, she symbolizes bliss and calm. Blue is the color code of this day. Blue color depicts tranquility yet strong energy.
Tritiya commemorates the worship of Chandraghanta - the name derived from the fact that after marrying Shiva, Parvati adorned her forehead with the ardhachandra (lit. half-moon). She is the embodiment of beauty and is also symbolic of bravery. Yellow is the color of the third day, which is a vivacious color and can pep up everyone's mood.
Goddess Kushmanda is worshiped on Chaturthi. Believed to be the creative power of the universe, Kushmanda associated with the endowment of vegetation on earth and hence, the color of the day is Green. She is depicted as having eight arms and sits on a Tiger.
Skandamata, the goddess worshiped on Panchami, is the mother of Skanda (or Kartikeya). The color of Grey is symbolic of the transforming strength of a mother when her child is confronted with danger. She is depicted riding a ferocious lion, having four arms and holding her baby.
Born to sage Katyayana, she is an incarnation of Durga and is shown to exhibit courage which is symbolized by the color Orange. Known as the warrior goddess, she is considered one of the most violent forms of Goddess Parvati. In this avatar, Kātyāyanī rides a lion and has four hands.
Considered the most ferocious form of Goddess Durga, Kalaratri is revered on Saptami. It is believed that Parvati removed her fair skin to kill the demons Sumbha and Nisumbha. The color of the day is White. On Saptami, the Goddess appears in a white color attire with a lot of rage in her fiery eyes, her skin turns black. The white color portrays prayer and peace and ensures the devotees that the Goddess will protect them from harm.
Mahagauri symbolizes intelligence and peace. The color associated with this day is Pink which depicts optimism.
On the last day of the festival also known as Navami, people pray to Siddhidhatri. Sitting on a lotus, she is believed to possess and bestows all types of Siddhis. Here she has four hands. Also known as Saraswati Devi. The light blue color of the day portrays an admiration towards nature's beauty.
These Navaratris celebrated in the whole world most of the time in the month of Assun/ Ashvin (Mid September) and or kattun (Mid October) after Sharada which means autumn. It is observed the lunar month of Ashvin (post-monsoon, September–October) during the harvest.
Navratris comes twice a year and second season mostly celebrated after the month of vasanta (mid March) during the spring season.