The festival, mainly followed by North Indians, is observed on the full moon day or no moon day of the Hindu month of Jyestha.Vat Savitri fast is observed for three day and nights. It begins on the Trayodashi day (13th day of a lunar fortnight) and ends on Amavasi or Purnima. Now, women mainly observe a fast on the main ritual day that is either purnima or Amavasi of Jyestha month.There are many fasts and rituals associated with married Indian ladies which they specifically perform for the well being and prosperity of their spouse.Vat Savitri Puja is one amidst the list.Vat Savitri Puja is observed by married women in almost all parts of India with great dedication and devotion. This is a special fast observed by married women for longevity of their beloved husbands. The festival is dedicated to the legendary married woman Savitriwho succeeded to get back her dead husband, Satyawaan by her severe penance. Vat Savitri Puja is celebrated across the nations. But the festival is mainly observed in Bihar, Uttar Pradesh, Delhi, Orissa and Maharashtra. South Indian married ladies especially of Tamil Nadu and Karanataka observe festival with the different name as Karadaiyan Nonbu.All married Hindu women observe this festival by worshiping and propitiating Savitri as a Devi. Women wake up early morning on the Savitri Vrat day and after taking a bath, wear new clothes and ornaments including bangles. All married women wearred vermilion on the forehead, which is elongated to touch the line parting the hair.
Savitri is symbolically represented by the grinding stone, locally known as Sila Pua. The grinding stone is thoroughly cleaned and worshiped. Bhoga or offering to Savitri consists ofrice, wet pulses and locally available fruits like mango, jackfruit, banana etc. The fasting begins at sunrise and ends after sunset with the evening prayers. This fast is a promise for securing the long life and health of their husbands. All of them gather near aVat (Banyan)tree to offer their prayers and worship with incense and flowers. Besides, they orbit roundthe tree and tie a sacred thread to it.

In some places, parents, elders and brothers give a token amount of money to fasting women. They alsoreceive blessings from the elderly married women after the Puja. It is said that theBanyan tree has the totality of Savitri.After the Puja they break their fast by havingfruits and milk. The fast is broken byconsuming the offering made to Savitri. Sometimes it is also seen that women give food to the Brahmins and get blessings from them. Women also make it a point to read or listen to the Savitri and Satyabana story mentioned in theMahabharata.
This festival is all about the true devotion and love of married women towards their husbands.