Shanaishchari Amavasya

Shanaishchari Amavasya (also called Shani Amavasya) is the no-moon (Amavasya) tithi falling on a Saturday, ruled by Shani (Saturn). Evaluated with the same Dharmasindhu aparahna-vyapti condition as Somavati Amavasya — the Saturday-Amavasya yoga must prevail for at least one muhurta in relation to aparahna kala. This day is widely observed for Shani puja, oil offerings at Shani temples, pitru tarpan, and remedies for Shani dosha/sade-sati.