Pradosh or Pradosh vrat is an auspicious Shiva Puja observed on every thirteenth day in both fortnights of a Hindu month. In July 2017, Pradosh vrat dates are – July 6 and July 21.
The first Pradosha pooja in July 2017 is Brihaspati Pradosh (6 July) as it falls on Thursday (Guruvar/Brihaspativar) and the second Pradosh Vrat falls on 21 July (Shukra Pradosh – Friday).
Pradosh puja time for any pradosh vrat is 4.30 to 6’0 clock in the evening of Trayodashi tithi.
Brihaspati Pradosh – 6 July 2017
Pradosh of 6 July 2017 falls in Shukla Paksha of Ashada month in North Indian Hindi calendars, Marathi, Telugu, Kannada, and Gujarati calendars.
And it coincides with Aani Masam of Tamil calendar, Mithuna Masam in Malayalam calendar, Ashar Month in Bengali calendar and Shrawan Month in Nepali calendar.
6 July 2017 – Trayodashi Pradosham Time – 6.44 PM to 8.46 PM
Shukra Pradosh – 21 July 2017
Pradosh of 21 July 2017 falls in Krishna Paksha of Shravan month in North Indian Hindi calendars, and Ashada Krishna Paksha in Marathi, Telugu, Kannada, and Gujarati calendars.
It falls in Aadi Masam in Tamil calendar, Karkidakam Month in Malayalam calendar, Shraban Month in Bengali calendar and Shrawan Month in Nepali calendar.
21 July 2017 – Trayodashi Pradosham Time – 6.45 PM to 8.41 PM
This Pradosh is even more auspicious for North Indians as it falls in Shravan Month and is also observed as Sawan Shivratri.