Pitru Paksha Significance: Mahalaya Pakshalu: Every fortnight in the Hindu month of Ashwin (as per the Purnimant calendar- when the month finishes with the Full Moon day) or Bhadrapada, Hindus dedicate a fortnight to the departed family members (as per the Amavasyant calendar- where the month ends with a New Moon Day). In the Chaturmas era, these 16 days is known as Pitru