Navratri is a nine-day festival that is celebrated by Hindus across the world. While there are four seasonal Navratris that are celebrated every year, the celebration of Chaitra Navratri in the spring season and Sharad Navratri that welcomes the winters are said to be the most important. Chaitra Navratri 2021 celebrations will begin on April 13 and will go on till April 22.