Tritiya Shraddha, also known as Teej Shraddha, is performed for the departed family members who died on Tritiya Tithi, including both Shukla Paksha Tritiya and Krishna Paksha Tritiya.
Pitru Paksha Shraddhas are Parvan Shraddhas. The auspicious time to perform these Shraddhas is either Kutup Muhurat or Rohina Muhurat and after that till Aparahna Kala ends. Tarpan is performed at the end of the Shraddha.
Auspicious Shraddha Timings