The day of Shakhambari Purnima is also called as Shakhambari Jayanti. It is the last day of Shakhambari Navratri festival. Unlike most Navratri festivals, which begin on the Shukla paksha pratipada, i.e. on the first day of the waxing moon phase, Shakhambari Navratri begins on the ashtami, i.e. the eight day of the waxing phase of the moon in the Vedic calendar month of Pausha and culminates on the full moon (purnima). She is believed to have incarnated on earth, to mitigate and relieve famine and other possible food crises.
On this day, we pray to Maa Shakhambari to express gratitude and obtain her continued blessings for our daily nutrition and sustenance.