Yati Dwadasi Shraddha or Yateenam Mahalaya is an auspicious day to perform shraddh rituals to Yathis or the saints who involved in writing, scripting, and compiling Vedas, Puranas, Upanishads, etc. In 2015, Yati Dwadasi date is October 9.
Muni or Rishi is also referred to as Yati. Yati Dwadasi Shraddh falls on 12th day in Pitru Paksha or Mahalaya Paksha in Krishna Paksha of Ashwin month as per North Indian Hindi calendar and in Bhadrapad month as per other Amavasyant Panchangams followed in Maharashtra, Gujarat, Andhra Pradesh & Karnataka.
Those who are not good at studies would be benefitted from performing Yati Dwadasi shraddh rituals.
As per Tamil beliefs, apart from the sacred spots for Pithru Tharpana pujas such as Gaya, Kashi, Rishikesh, Haridwar & Prayag, the best places for Yati Dwadashi Shraddh are: Ramagiri near Surattapalli, Devar Malai near Karur, Thakkolam near Chennai, Ootathoor.