Sharad Purnima is observed on the night of full moon of Ashvina. The night of full moon of Ashvin is also known as the Moon-god and the lord of herbs, seeds, the Brahmins, water and Nakshatras or Constellations. It is believed that on the Sharad Purnima day, the Moon through his beams is showering Amrit or elixir o the earth.

On this auspicious day Ksheer or Kheer (milk thickened with rice and mixed with sugar) is specially prepared in the temple and homes, and offered to Hari amidst ringing of the bells and chanting of the hymns, then it is given in the morning as Prasad to the devotees. The kheer is kept in the moonshine the whole night so that it may absorb the Amrit falling from the moon. Such a kheer is considered to possess many qualities. At night Moon-god is also worshipped and offered naivedya.