Prathamastami is a popular festival celebrated in Orissa in the month of Margasira, which coincides with the Gregorian months of November and December. During the festival, the eldest child of the family is honored by offering prayers to goddess Sasthi for his or her safety and well-being. The child is treated like royalty, given new clothes and made to sit on a wooden platform where most of the rituals are conducted. In 2012, the festival will be celebrated on 7th December, Friday.

It is an occasion to perform puja for the well-being of the first child in the family. A delicacy called Haladi Patra Enduri Pitha (idlis filled with sweet stuffing and wrapped in green leaves of turmeric plant before being steamed) is the specialty of the day.