Navaratri is the parva that is celebrated for the goddess durga and her nine incarnations; it comes four times a year but mainly Vasant navaratri and Shardiya navratri is known most widely among the people as Vasant navratri is associated with the coming of spring and the last day of Shardiya navratri is celebrated with the coming of Vijaya dashami and Dusshera.
Navratri Vrat Katha
According to legends once lord brahaspati asked lord brahma about the vrat of navratri that why it is celebrated and who started the ritual of this vrat. On listening, this lord brahma replied that you have asked a question of extreme importance and the answer will help whole of mankind.
Lord Brahma began to bestow the knowledge of navratri vrat to brahaspati; he explained that whoever worships Devi durga on this day by keeping fast is blessed with all the wealth and riches of the world, prosperity and abundance flows in his life, all materialistic gains are observed.
The vrat was for the first time was kept by sudarshan the prince of kosala kingdom unknowingly, the actual story of his birth began when king durvasindhu lost his life to a lion and a new heir was to be chosen but was contested by the grandfather of two princes in which sudarshan grandfather was killed in a battle and his mother manorama has to flee with him under the protection of rishi bhardawaj.
Once the boy heard a word started repeating it half of the word kleeba as Klee and unknowingly and started pronouncing it as Kleem which is the most auspicious mantra invocation of maa durga which attained him mind peace and high wisdom.
Once a Banaras king minister was passing by and saw the boy on learning he is a prince he decided he is the right choice for their princess and they got married, soon after the city of banaras was attacked by Kosala kingdom but maa durga burned all of attackers into dust after this rishi bhardawaj came forward and declared sudarshan as the new king of kosala, since then navratri vrat is celebrated by everyone.