The festival in India that marks the beginning of the harvest season is Onam. Celebrated primarily in the state of Kerala, it features vibrant rural festivities such as traditional dances, including Thiruvathira and Kathakali. Participants decorate their homes with floral arrangements called pookalam and enjoy festive feasts, particularly the elaborate Onam Sadhya. Onam not only signifies the harvest but also brings together communities through various cultural activities, showcasing a rich blend of tradition and celebration amidst the festive spirit.