Onam is a traditional harvest festival celebrated widely in South India, especially Kerela. It falls in the Malayalam calender month of chingam, which is Gregorian calender overlaps with August-September. This festival is also celebrated by some Christians. People buy and wear new clothes for the occasion of Onam, and this tradition is called Onakkodi. On the day of Onam, Keralite Hindus install an image of Thrikkakara Appan or Onatthappan in their home.