Sharad Poornima is also known as Kojagari Poornima. Sharad Poornima is a harvest festival celebrated on the full moon day of the Hindu lunar month of Ashwin (September-October).
This is a traditional celebration of the moon and is also called the Kaumudi celebration, Kaumudi meaning moonlight.
At night, goddess Laxmi is worshiped and night vigil is observed. According to a folk-tale, once a king fell on evil days, and was in great financial straits, but then his queen observed this fast and night vigil, and worshiped the goddess of wealth, Laxmi.
Some people believe[who?] that on this night Laxmi moves about from place to place asking, “Who is awake?” (”Kojagarti?”). So people sit in the moonlight singing songs, or keep themselves entertained in some other way. They fast from solid food and take only fluids like coconut water or milk.
According to the Vedic scriptures, the Divine Raas Lila of Lord Krishna with Radha and Gopis happened on the night of Sharad Poornima.
It is a harvest festival and is celebrated throughout the country, particularly by Maharashtrians