Naag Panchami is the festival of snake people worshipped the god Naag Devta. It is coming in the fifth day of Shravan which is held in July/August, which are reverences for the Cobra are paid.
There is a widespread before the Aryan invasion, worshipping of snakes or Naga was later incorporated in to Hinduism by the Aryans themselves. Hindu Mythological books are famously are closely with stories, fables, and pictures of snakes.
There is oldest celebration of fast on this days, women are trying to draw the images of snake on this days and also hang on the walls of their houses includes with cowdung, milk and black powder. Which is gives us milk, Ghee, sweets, water and rice which have been preparing at the size of their holes. If the snake had drink the milk which you kept then you are a lucky person as they think. This festival is celebrated as different ways and different part of the India.
There is so many observed in southern India, Maharashtra and Bengal. In Jodhpur, very long cloth effigies of the snake which are displayed at major fairs.
Feeding snakes , Pouring milk in the snake pits and lighting up cracks should be discouraged. This doesn’t help them live but actually kills the snakes. Snakes do not drink milk.
Nagas should be worshipped to remind yourself that we humans should in harmony with nature. The ideal way of worshipping Nagas is by protecting our forests and grooves which serve as a home to snakes and other animals.