Ganesha Pavitraropanam (Vighnaharina Pavitraropana) is a ritual observed in Shravana Masam as per Telugu Panchangam. In 2018, Ganesha Pavitraropanam date is August 14.
It falls on Shukla Paksha Chaturthi on Shravan Month. On this day, Lord Ganapathi is worshipped by offering Pavitra (cotton threads). Pavitra Samarpana is a ritual observed throughout Shravana Masa for each God a day.
As per ancient Hindu texts, there are different bhavas of Pavitra. Kesri coloured Pavitra represents satvik bhava, white and red represents rajas bhava, green coloured is tamas bhava and sky blue is nirguna bhava.
On the same day, Nag Chaturthi Upvaas is observed throughout India.