At sunrise on this day, til, rice, and other food items are offered to the ancestors. 'Puja', 'havan', and 'daan' are then performed. No celebrations are allowed, and nothing new may be purchased, during this time. Pitru Paksha 2022 Starts: Dates, History, Significance, Tarpan Rituals - Here's All You Need to Know About Shradh Paksha.