In South Indian states, on first / second day of Durga Navarathri, Sri Bala Tripura Sundari Devi is worshipped.
Bala Tripura is a form of Goddess Durga Devi. In 2012, Sri Bala Tripura Sundari puja date is October 16th during Durga Navratri.
Especially in Sri Kanaka Durga Temple of Vijayawada, Andhra Pradesh, it is celebrated with utmost devotion.
sri bala tripura sundari devi image above 2mb