Brahmin is known as a dwija , twice born.
The ceremony of Upanayanam conceptually denotes his re-birth. This ritual is performed at the age of 6-9 years. The Upanayana of a Brahmin boy is performed in the eighth year, in the eleventh year for a Kshatriya and in the twelfth year for a Vaishya . The priest, according to the calendar, decides the muhurtham. The religious rites include ghana , the inaugural ceremony, Ganapati poojana , and Punyahavachana .