Deep Amavasya is Ashadh Krishna Amavasya — the last day of the Ashadh month, one day before Shravan begins. The panchang also calls this day "Darsha Thanavayi Amavasya." The main ritual is cleaning and worshipping every lamp in the home — this is called deep pujan. In some places, this day is also popularly (but not scripturally) called "Gatari Amavasya." In 2026, this tithi falls on Wednesday, 12 August.
Deep pujan / gratitude to Agni is the core of this day. On Ashadh Amavasya, every metal lamp in the home — the samai, nirajan, panti — is scrubbed clean and then worshipped. This is regarded as a day of expressing gratitude toward the principle of light/fire.
Since this is the last day of the Ashadh month, it also carries significance as the gateway to Chaturmas/Shravan — many traditions hold that from the very next day, the fasting rules of Shravan and Chaturmas (avoiding meat, onion-garlic, etc.) begin.
In some traditions, a lamp is made from wheat flour or jowar flour mixed with jaggery and placed facing south — a traditional belief that it symbolically lights the ancestors' path toward Yama's abode, not a scriptural claim. This lamp is later also offered as naivedya. The detailed ancestor-tarpan ritual is covered on the Sarvapitri Amavasya page — the kankecha-diva mention here is kept brief.
In some (especially urban) communities, this day is popularly known as "Gatari Amavasya" and marked with meat and alcohol, as the "last day" before these are avoided through Shravan — this name is not religious or scripture-based, just popular usage, and the custom is not universal across all Marathi households. For many families, this day is simply one of deep pujan.
The moon isn't visible on Amavasya, and every month's Amavasya — not just Ashadh's — is considered especially auspicious for remembering ancestors; it's believed to be a special day for connecting with ancestors' souls. Devotees bathe early in the morning and offer water and sesame seeds to their ancestors, a rite called tarpan; some keep a fast or eat a simple satvik meal, and giving food to those in need is also considered meritorious. The detailed tarpan ritual is covered on the Sarvapitri Amavasya page — this is just the general ancestor-remembrance significance of a Darsha Amavasya.
Deep pujan is generally performed in homes across the board — no source found any claim of a specific gender/age restriction.
This day does not have a specific, standalone legend (a birth/avatar or god-demon story) attached to it. This day is chiefly driven by significance and custom — gratitude through deep pujan, and marking the close of Ashadh and the threshold of Chaturmas — that's the basis on which its importance rests.
The exact evening timing varies by location/tradition — check the 12 August day page for the tithi's start/end times.
Samai/nirajan/panti (every lamp available at home), oil and wicks, turmeric-kumkum, flowers, rangoli, puran or other sweets for naivedya, an optional kankecha diva. (Materials can vary by family/local tradition.)
No specific mantra or shloka for deep pujan was found in any researched source — only a general description of worshipping the lamps with turmeric-kumkum.
The panchang also calls this day "Thanavayi Amavasya" — no independent source could verify the exact meaning/origin of this term, so it's recorded here only as an alternate panchang name.
Sources don't agree on where the name "Gatari" comes from (some say it's a corruption of an older word, "Gatahari"; some respected sources reject the name altogether) — that detail is kept brief in the FAQ below rather than expanded here.