The brahmin invited for the place of the deceased ancestors (pitars) in the ritual is seated facing the north. He is called the pitar-brahman. The brahmin invited for the place of Deity in the ritual is seated facing the east.
Normally no moon night, 12 sankrants in a year, solar-lunar eclipses, Yugadhi and Manvadi dates, Ardhodayadi parva, date of death, arrival of Shrotriya priests (Brahmins) etc dates are considered appropriate for performing shraddha.
For this reason, shraddha has been recommended in the religious Scriptures. Instead of shraddha, on this day some people offer food to the poor or money to a school as per their mind. By doing this no spiritual benefit is gained.
During the shraddha rites and the meal, one should not entertain anger and meaningless thoughts. The vibrations generated due to the meaningless thoughts adversely affect the Vishvedev and the deceased ancestors (Pitars) coming to that place.
The term ‘Shraddha’ has originated from ‘Shraddhaa’ (faith). It is impossible to repay the various favors, which our deceased forefathers have done for us. The ritual performed for them with complete faith is known as Shraddha.