Onam is an annual Indian harvest festival celebrated predominantly by the people of Kerala. It is a major annual event for Keralites and is the official festival of the state, including a spectrum of cultural events. The festival spans over ten days, showcasing an array of cultural activities, traditional rituals, and artistic performances. The main cultural elements of Onam festival celebration include:

• Pookalam: One of the most prominent aspects of Onam is the creation of intricate and colorful floral rangoli designs called "Pookalam".

• Feasting: The festival is celebrated with feasting, which includes traditional dishes such as "sadya".

• Traditional Dances: Onam is celebrated with a number of cultural elements like Thumbi Thullal, Onavillu, and Onapottan.

• Boat Races: One of the highlights of Onam is the boat races, which are held in various parts of Kerala.

• Revisit of Mahabali: The festival marks the revisit of Mahabali, a mythical king who is believed to visit Kerala during Onam.

• Unity and Prosperity: Onam significantly brings back Keralites to their home and spreads the message of unity and prosperity across the world.

• Religious Significance: Onam has a long religious context and history in Kerala and neighboring parts of South India. It is celebrated by both the Hindu and non-Hindu communities, leaving their caste and religion behind to celebrate the Onam with great enthusiasm. Christians celebrate Onam in their own way, lighting Nilavilakku, followed by an arati and Pushparati, and having a meal together with their Hindu friends.