Shani Pradosham

Shani Pradosham is the Pradosha Vrata (Trayodashi twilight worship of Shiva) falling on a Saturday, ruled by Shani (Saturn), widely considered the most auspicious of the weekday Pradoshams, observed for Shani dosha/sade-sati remedies. When this occurrence is also the Gauna (secondary) Pradosham day, the rare case where Trayodashi falls across two days, it is shown as "Shani Pradosham (Gauna)".