Mangani festival The festival has been celebrated every year on the full moon day of the Tamil Month Aani in a grand manner in veneration of Karaikal Ammaiyar, one among the 63 Nayanmars of Saivism. A large number of devotees gathered at Karaikal and flung ripe mangoes to offer worship to the processional idol of Lord Pichandavar, marking the Mangani festival.