Pithru Amavasya is also known as Mahalaya Amavasya or Bhadrapada Amavasya or Sarvapithru Amavasya.
According to Amavasyanth calender it’s performed on the last day of the month and it is the starting of Vijaya Dashami (dusshera) and Bathukamma. Generally it falls in September- October months of Gregorian calender.
This day is a special, most important and highly sacred day for Hindus as every Hindu family express their grattitude to the previous generations of people. Hindus pay homage to their ancestors by way of food offerings on this day.
In Telangana, the colorfull festival of flowers i.e. BATHUKAMMA(A Floral Festival), starts on this day and it celebrated for nine days. On this aspicious day Bathukamma is called as Engili Puvvu Bathukamma, because first they pay homage to their ancestors by way of food offerings and then they start making Bathukamma.
In Bengal, this day is the beginning of goddes Durga Devi puja festivities i.e., Navarathri Uthsav beginning.