Diwali is observed on 4 November 2021.  It is celebrated as Lakshmi goddess was born from Samudra Manthan. On the night of Diwali goddess Lakshmi chose Lord Vishnu as her husband. And there is one more reason for it, Rama returned to his people after 14 years of exile and defeating the demon king Ravana. Diwali is also known as the Festival of lights and deepawali. It symbolizes the triumph of light over darkness.