By doing it under the (prior) Phalgunis, one gains good fortune. By doing the Shraddha under the later Phalgunas one gets many children; while by performing it under Hasta, one gets the fruition of his wishes.
फल्गुनीषु ददच्छ्राद्धं सुभगः श्राद्धदो भवेत्। अपत्यभागुत्तरासु हस्तेन फलभाग् भवेत्॥