Indira Ekadashi, which falls during the Krishna Paksha of the Ashwin month, is one such meritorious tithi. As it occurs during Pitru Paksha, this day is specially associated with the worship of Lord Vishnu along with feelings of reverence and righteous deeds.
Our ancestors laid the foundation of the family through their lives, austerities, values, and good deeds. Pitru Paksha is the sacred opportunity to express reverence and gratitude towards them.