'Naga Panchami or day to worship snakes by Hindus - by K J S Chatrath'

Naggakal from Bellary District- On display in Chennai Government Museum, Tamil Nadu, India.

Panchami is the fifth day among the fifteen days of the moon's waxing and/or waning. This special day of the serpent worship always falls on the fifth day of the moon's waning in the Lunar Hindu month of Shravana July/August. Hence this is called Naga Panchami (Naga  is serpent in Hindi language).

 Snake worship in South India. Photo source- Wikipedia.