Onam is the yearly harvest festival in the state of Kerala, India. Onam is the official state festival of Kerala since 1960. It is celebrated with joy and enthusiasm all over the state by Malayalees regardless of religion, caste or creed. According to a popular legend, the festival is celebrated to welcome King Mahabali, whose spirit is said to visit Kerala at the time of Onam.
Onam is a 10 day long festival celebrated in the beginning of the month of Chingam, the first month of the Malayalam Calendar (Kollavarsham). This corresponds with the month of August to September according to the Gregorian Calendar. Of the 10 days, the first day, Atham and tenth day, Thiruvonam are most important of all.
The most important activity of during the 10th Day of Onam "Thiruvonam" is the grand Thiruona-Sadya, well known for being one of the most sumptuous feasts ever prepared by mankind. The level of sumptuous varies at each individual household, however every household tries to make as grand as possible as they can. The feast served on plantain leaves have more than 13 to 15 curries apart from other regular items.