Pradosham or Pradosh vrat is very auspicious vratham dedicated to Lord Shiva. Pradosha puja is observed at evening time on Trayodashi or 13th day in Shukla Paksha and Krishna Paksha of Hindu month. Pradosham in December 2011 or Pradosh vrat December 2011 dates are – December 7 and December 22.
Pradosh on 7 December 2011, Wednesday – It is auspicious to perform Budha graha dosha nivarana puja on this day. It falls in Shukla Paksha of Margashirsha month in Telugu, Kannada, Gujarati, Marathi & all other North Indian Hindi calendars.
Pradosh on 22 December 2011, Thursday – Brihasptai Pradosham / Guru Pradosh – those who are suffering from Brihaspati graha dosham can observe Guru graha dosha nivarana puja. It falls in Krishna Paksha of Poush Month in North Indian Hindi calendars & in Margashira masam as per Marathi, Telugu, Kannada & Gujarati Panchangs.