Bhauma Pradosham

Bhauma Pradosham is the Pradosha Vrata (Trayodashi twilight worship of Shiva) falling on a Tuesday, ruled by Mangal (Mars) — traditionally observed for relief from debt and Mangal dosha. When this occurrence is also the Gauna (secondary) Pradosham day — the rare case where Trayodashi spans two civil days ambiguously — it is shown as "Bhauma Pradosham (Gauna)". Generic "Pradosham" queries also surface these dates.