Durga Pavitraropanam (Durga Devi Pavitrotsavam) is a ritual observed in Shravana Masam as per Telugu Panchangam. In 2018, Durga Pavitraropanam date is August 18.
It falls on Shukla Paksha Ashtami on Shravan Month. On this day, Goddess Durga 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, Durvashtami is also observed throughout India.