Kamya Shraddha is the name given to Tripindi Shraddha. The soul of a dead person whose Shraddha was not performed constantly for three years is classified as Pret (just like a ghost). The day of Pitars is Amavas. Shraddha should be practised on this day. Tripindi should not be performed on Navratri or the day of death in the Krishna fortnight of the month of Bhadrapada.