Navaratri is an annual and one of the most revered Hindu festivals observed in the honor of Mother Goddess Durga. It spans over nine nights (and ten days), first in the month of Chaitra (March/April of the Gregorian calendar) and again in the month of Sharada. It is observed for different reasons and celebrated differently in various parts of the Hindu-Indian cultural sphere. Theoretically, there are four seasonal Navaratri. However, in practice, it is the post-monsoon autumn festival called Sharada Navaratri. The festival is celebrated in the bright half of the Hindu calendar month Ashvin, which typically falls in the Gregorian months of September and October. It takes place at the same time as the Nine Emperor Gods Festival.