Sarvapitri Amavasya is the day for a collective shraddha of all ancestors of one's lineage — especially for those whose death-tithi is unknown, or whose tithi-shraddha was missed this year. This tithi is Bhadrapad Krishna Amavasya — the last (concluding) day of Pitru Paksha. In 2026, it falls on Saturday, 10 October. This day is also called Pitru Moksha Amavasya.
Throughout Pitru Paksha, shraddha is performed daily by tithi-matching — this principle is covered in full on the Pitru Paksha page. But Sarvapitri Amavasya doesn't require a specific tithi at all — a collective remembrance of all known and unknown ancestors, and of any missed shraddhas, becomes possible on this single day. This is the core of this day.
Since not knowing the exact death-tithi is a common situation for many families, this day is, in practice, regarded as the most widely observed Pitru Paksha day for many.
Ancestors' souls are believed to visit their descendants during this fortnight; if shraddha isn't performed, they're said to return disappointed — Sarvapitri Amavasya, being the last chance, is considered especially important. The same underlying sentiment — repaying a debt to past generations, expressing gratitude — applies here too.
Some sources suggest that performing shraddha on this day is believed to reduce the effects of pitru-dosha (delayed marriage, financial difficulties); this claim appears only in a few sources with no scriptural mechanism behind it — so it's recorded here only as a belief, not as any specific remedy or prescription.
The full Karna legend of Pitru Paksha is already covered in detail on the Pitru Paksha page — it isn't repeated here. Only this brief backdrop: the charitable Karna received gold and jewels after death in return for his charity, but no food, because he had never fed his ancestors (shraddha) — so he was sent back to earth for a time to perform shraddha and food-donation. This period later came to be called Pitru Paksha/Mahalaya, and its last day is this very Sarvapitri Amavasya — where, by belief, all such debts are settled.
Shraddha is generally performed by a male household member, especially the eldest son, for his ancestors — following the general Pitru Paksha rule. It especially applies to: (a) those who don't know their ancestors' exact death-tithi; (b) those whose tithi-shraddha was missed this Pitru Paksha for any reason; (c) those who wish to remember all ancestors of their lineage together. It's observed pan-India, including Maharashtra; details vary by family tradition.
The components/sequence vary slightly by source, and by tradition.
Black sesame, darbha/kush grass, rice/grain flour, ghee, water, a banana leaf (in simple household rituals), food portions for the panchbali, naivedya, and dakshina. Items vary by family/priest tradition.
A simple, sattvic vegetarian meal; onion, garlic, meat, and alcohol are avoided — the general Pitru Paksha rule also applies on Sarvapitri Amavasya. This can vary by household/local tradition.
Traditional tarpan mantras and gotra recitations are chanted during tarpan.
Maharashtra: Nashik (on the Godavari's bank, at Ramkund) is a well-known shraddha-tarpan tirtha — the detailed reference for this lives on the Pitru Paksha page, and isn't repeated here.
For pitru-dosha remedies, Narayan Nagbali/Tripindi Shraddha at Trimbakeshwar are separate, year-round rituals — distinct from the routine/Sarvapitri shraddha of Pitru Paksha. See the Trimbakeshwar page for more.
Naming: in the Maharashtra/amanta tradition, this tithi is Bhadrapad Krishna Amavasya; in the North Indian/purnimanta tradition, it's called "Ashwin Krishna Amavasya" — the same day, just a different name.