Banadashtami is dedicated to Goddess Banashankari and is observed mainly in Karnataka. Banadashtami 2017 date is December 26. Banada Ashtami is observed on the eighth day during the waxing phase of moon (Shukla Paksha) in Kannada Paush month. Goddess Banashankari is also known as Vanashankari or Banadevi or Shakhambari.
This is one of the most auspicious days dedicated to Goddess Banashankari in a Hindu calendar.
Goddess Banashankari is an incarnation of Goddess Parvati. She is believed to have performed a divine event of annihilating demon Durgamasura.
Banashankari or Shakhambari Navratri is also observed during the period.