This marks the full moon day. The moon, which is one of the Nava Grahas denoted as CHANDRAN, is considered as a deity who showers blessings of prosperity and good health. This occurs once every month, usually a fortnight after Amavasai. The Pournami, which occurs during the month of Chithirai, that is the beginning of May is considered of special importance and celebrated as Chitra Pournami by South Indians.