Onam falls in the month of Chingam(Aug - Sep), which is the first month according to the Malayalam Calendar. The celebrations begin within a fortnight of the Malayalam New Year and go on for ten days. All over the state of Kerala, festive rituals, traditional cuisine, dance and music mark this harvest festival.
The Onam sadya (feast) is very indispensable part of Thiruvonam, and almost every Keralite attempts to either make or attend one. The feast is served on plantain leaves and consists of about 26 dishes
Traditional dance forms including Thiruvathira, Kummattikali, Pulikali, Thumbi Thullal etc. are performed as part of celebrations all over Kerala at this time. ..
The tradition of buying and wearing new clothes for the occasion of Onam is called the Onakkodi.