Diwali is celebrated to mark the victory of light over darkness, good over evil, and knowledge over ignorance. It commemorates several significant events, such as the return of Lord Rama to Ayodhya after defeating the demon king Ravana, the victory of Lord Krishna over the demon Narakasura, and the liberation of Lord Mahavira in Jainism.  

Key reasons for the celebration

Hinduism: The most common reason is the return of Lord Rama, Sita, and Lakshmana to Ayodhya after 14 years of exile and defeating Ravana. It is also associated with Lord Krishna defeating the demon Narakasura and freeing 16,000 women. 

Jainism: It marks the day Lord Mahavira attained nirvana (enlightenment). The lighting of lamps symbolizes the light of his holy knowledge. 

Sikhism: It commemorates the release of the sixth Sikh Guru, Guru Hargobind, from imprisonment by the Mughal emperor Jahangir. 

Buddhism: Some Buddhists, particularly the Newar people of Nepal, celebrate it as a commemoration of Emperor Ashoka's conversion to Buddhism. 

Common practices

Decorations: Homes are cleaned and decorated with oil lamps (diyas), candles, and colorful rangoli designs to welcome deities and symbolize light and prosperity. 

Worship: Many families perform a special puja (prayer) for Goddess Lakshmi, the goddess of wealth and prosperity, and Lord Ganesha, the god of good luck. 

Family and community: It is a time for family gatherings, exchanging gifts, and sharing sweets. 

Other observances: The five-day festival includes traditions like Dhanteras and Bhai Dooj, where sisters pray for their

brothers.