What is the significance of nine holy days in India? The Navaratri adoration.

The Hindu Festival, Navratri, Nava meaning nine, and Ratri meaning nights, is typically observed in the fall between the months of September and October, although specific dates are determined in accordance to the lunar calendar and can vary each year. In some parts of India, a Navaratri festival is celebrated in the spring as well as the fall (Fuller) and is a nine night, ten day festival, in which the Mother Goddess and her various forms are celebrated each day .