Mandala Puja marks the end of the 41 days long austerity known as Mandala Kalam that is observed by the followers or devotees of Lord Ayyappa. The 41 day fast begins on the first day of the Malayalam month of Vrishchikam .

Mandala Puja along with ‘Makara Vilakku’ are the two major events held at the Sabarimala Ayyappa Temple that draws devotees from all over Kerala and neighbouring states. During this time the temple remains open on most of the days for the devotees.