Vat Purnima Vrat is one of the most important Hindu women's holidays, especially for those who are married. Married ladies commemorate Vat Purnima Vrat on this day to pray for their husbands' health and longevity. However, the fast is observed on both Amavasya and Purnima days.
The tales are based on a narrative from the Mahabharata period. Asvapati, the childless monarch, and his consort Malavi yearn for a son. Finally, the God Savitr arrives and informs him that he will have a daughter shortly. The king is ecstatic at the idea of having a kid.