During the nine days,  devotees solemnly fast and worship the nine manifestations or forms of  Goddess Durga, also known as Shakti. Each day has a special  significance, and one form of the Goddess is worshipped. Each day is  also associated with one colour, and one planetary body.
  
 It’s the festive season and people across India are all set to  celebrate many important festivals this month. Starting with Navratri,  one of India’s biggest festival celebrated by the Hindus, it is observed  with great fanfare and devotion for nine nights and 10 days. Though  there are four seasonal Navratris, two are widely celebrated, one known  as the Chaitra Navratri observed in March/April, another known as the  Sharad Navratri observed in September/ October. 
 It is observed for different reasons and celebrated differently in  various parts of India and there are many parallel histories associated  with it. But mostly, it is believed that during this time Goddess Durga  defeated Mahishasur, the buffalo demon who signifies evil and ego. There  is a history of Ramayana too associated with the festival as it was on  the day of Dashami, the day after Navratri ends, Lord Ram killed Ravan.
 During the nine days, devotees solemnly fast and worship the nine  manifestations or forms of Goddess Durga, also known as Shakti. The  Sharad Navratri or autumn Navratri is celebrated in the lunar month of  Ashwin according to the Hindu calendar. Each day has a special  significance, and one form of the Goddess is worshipped. Each day is  also associated with one colour, and one planetary body.
 Here are the Navadurgas that are worshipped on Navratri.  
Day 1:
Known as the Pratipada, Shailaputri is worshipped on this day.  Goddess Parvati is the daughter of Himalaya, the mountain. In Sanskrit,  Shail means the mountain and thus she is also was known as Shailputri.  The goddess in this form rides a bull, carrying a Trishul in her right  hand and lotus in the left hand.  
Day 2:
On Dwitiya, goddess Brahmacharini is worshipped. Here the goddess  walks bare feet and a japamala and a kamandalu can be seen in her hands.  In this form, Parvati became the great Sati and her unmarried self is  worshipped as Brahmacharini.  
Day 3:
Goddess Chandraghanta is worshipped on Tritiya. The name derives from  the fact that after marrying Lord Shiva she started adorning half  Chandra (moon) on her forehead. Here the devi has 10 days and rides a  tiger.  
Day 4:
On Chaturthi, Devi Kushmanda is worshipped. Also known as the creator  of the universe, Kushmanda is also known as the goddess who has the  power and capability to reside inside the Sun. Here she has eight hands  and sits on a lion.   
Day 5:
Goddess Skandamata is worshipped on Panchami. Skandamata or mother of  Skanda also known as Lord Kartikeya and rides a ferocious lion along  with the baby in one of her hands. The Goddess has four hands.  
Day 6:
Devi Katyayini is revered on Shasthi. Known as the warrior goddess,  it is considered one of the most violent forms of Goddess Parvati. The  name derives as she was born to Rishi (sage) Katya. In this avatar, the  Devi rides a lion and has four hands.  
Day 7:
On Saptami, Devi Kalaratri is worshipped. Legends go to say she forgo  her skin colour and embraces a dark complexion as black to kill demons  Shumbha and Nishumbha. Riding a donkey she has four hands here.  
Day 8:
Known as Ashtami Mata Mahagauri is worshipped on this day. Mahagauri  means extremely white (maha meaning great and gauri meaning white. The  name derives from the fact that Parvati had a fair complexion. Here she  rides a bull and has four hands.  
Day 9:
The last day of the festival also known as Navami, people pray to  Devi Siddhidaatri. Sitting on a lotus, she is believed to possess and  bestows all type of Siddhis. Here she has four hands.