Taddinam or the Srardha Ceremony is offering food for your pithrus within the pithru loka and thus satisfying their atma enabling us to receive the blessings of the Pitrus. శ్రద్ధేన దీయతే శ్రార్ధం అనగా శ్రద్ధతో చేసినదానికే శ్రార్ధం అని పేరు. (any act that is performed with all sincerity and absolute faith in it.). This abdikam Ceremony can be done as Hiranya or it can be performed along with the homa. Every year, one should perform as per the actual Hindu calendar Tithi date, Paksham (Sukla Pakshamulu or Krishna Pakshamulu), and Masam. Taddinam is a Sanskrit word. Some people call this as Amam.