Panchagavya Prashna is observed in Ashada month by certain Hindu communities in South India. The ritual involves consuming of Panchagavya, a combination of five products – milk, curd, ghee, cow urine and cow dung. Panchagavya Prashna 2011 date is July 12. It is believed this helps in checking various diseases and is consumed as part of the Chaturmasa Vrata.
Panchagavya Prashna is observed on the 12th day during the waxing phase of moon in Ashada month – Ashad Shukla Paksha Dwadasi.
The four month Chatur Masa Vrata begins on the previous day of Panchagavya Prashna.
It is also performed to overcome the effects of Tamasic food consumed during the previous year.