Read the key differencesThe Navratri festival is mainly celebrated four times a year. Of these, two are the most important: Chaitra and Sharad Navratri. Of these, two are the most important: Chaitra and Sharad Navratri. According to the Hindu calendar, it is called Chaitra Navratri because it falls in the month of Chaitra. Chaitra Navratri is widely popular in North India and holds special significance in Maharashtra and Andhra Pradesh.