Sharad Purnima falls on the full moon day of the Hindu lunar month of Ashvin. According to the Hindu myths, on the festival, also known as Kojagari Poornima or Ras Purnima, all the newly married women fast for a day. According to Drik Panchang, the harvest festival falls on October 5 and the tithi timing begins from 01:47pm and ends on October 6 at 00:09am. The time for moon rise on Sharad Purnima is anticipated to be around 18:02pm.
According to Hindu culture, only Lord Krishna was born with all sixteen kalas and he is the incarnation of Lord Vishnu. It is also said that Lord Rama was born with only twelve kalas.
Not only does the moon shine with all sixteen kalas but its rays also have certain therapeutic properties that nourish the body, mind, soul. It is also supposed that the moon rays on the day of Sharad Purnima ooze nectar. Traditionally, to take advantage of the divine experience, rice-kheer, a famous Indian sweet dish made of cow milk, rice and sugar, is prepared and left before the moonlight for the whole night. In the morning, the kheer said to exemplify an essence of nectar in it, is distributed among all family members.
On the day of Sharad Purnima, enthusiast also read the renowned story or katha of two sisters, who observed fast on every Sharad Purnima. While the younger sister would never do the rites with full dedication, her elder sister was extremely committed and religious. According to the story, the younger sister had to face adversity in life whereas her elder sister lived a happy and joyful life. This effect is said to be due to the grace of Lord Moon and the exteme power of the Sharad Purnima vrat.
Hence, worshiping the moon on the day of Sharad Purnima is considered noteworthy. Newlywed women, who take a oath to do Purnimasi fasting for a year, begin the fast from the day of Sharad Purnima. In Gujarat, it is commonly known as Sharad Poonam.