time calendar and cosmology
What is Pitru Paksha and how does it fit into the Hindu lunar calendar?
What the tradition says
The word Pitru means ancestors or forefathers. Paksha means a fortnight. Together they name the period the tradition sets aside for rites that honour those who have died. The main practices are Shraddha and Tarpana. Shraddha is a ritual offering of food, usually cooked with sesame seeds and barley. Tarpana is an offering of water, often made at a river or a sacred tank. The tradition holds that these rites bring peace to the souls of ancestors and keep the bond between the living and the dead in good order. Puranic tradition, including what is found in texts like the Garuda Purana and the Dharmasindhu, gives guidance on which day of the fortnight is correct for honouring a particular ancestor, based on the lunar date of their death.
Where it sits in the calendar
The Hindu lunar calendar divides each month into two fortnights. The bright fortnight, Shukla Paksha, builds toward the full moon. The dark fortnight, Krishna Paksha, moves toward the new moon. Pitru Paksha is the Krishna Paksha of Ashwin, which usually falls in September or October. It begins the day after the full moon of Bhadrapada, the month just before Ashwin. The final and most important day is Mahalaya Amavasya, the new moon that closes the fortnight. Many people who cannot observe the full sixteen days still observe this last day. Right after Mahalaya Amavasya, Navratri begins, which is why people sometimes describe Pitru Paksha as the fortnight just before Navratri.
Why this time of year
The tradition sees the dark fortnight as a time when the boundary between the world of the living and the world of the ancestors is thinner. Offerings made now are believed to reach those who have passed more easily. Because the period belongs to the ancestors, it is generally not considered a time for auspicious events like weddings, new beginnings, or celebrations. Families tend to keep things quiet and turn their attention inward.
How people observe it today
Practice varies widely by region, family, and community. In some households the rites are performed daily across all sixteen days. In others, just Mahalaya Amavasya is observed. Some families go to a river or a pilgrimage site. Others perform simpler rites at home. In the Hindu diaspora, where access to priests or sacred rivers may be limited, many people adapt the observance to what is possible, keeping the intention of remembrance even when the full ritual form is not available. The core of it, pausing to remember those who came before, stays recognisable across all these variations.