Nāga Panchami is a Hindu festival organized in almost every part of India. According to the Hindu lunar calendar the festival is held on Panchami (the fifth day or "tithi" of the fortnight or "paksha") in Shravan (Shravanam) month. In the Gregorian calendar it is July and August.
http://traditionscustoms.com/festivals/naga-panchami
Here are a few links which elaborate further on the Hindu and Pagan festival of Snakes, Nag Panchami
http://en.wikipedia.org/wiki/Nag_Panchami
http://www.aryabhatt.com/fast_fair_festival/Festivals/Nag%20Pancham...
http://festivals.iloveindia.com/naag-panchami/index.html
The Nine Sacred Nagas are worshipped during this time.
http://festivals.iloveindia.com/naag-panchami/rituals.html
The Goddess Manasa is the primal Serpent Goddess of India. Many times, a person has been saved from certain death by snakebite, by invoking the healing powers of the Goddess Manasa Devi, whose worship as the Queen of Snakes extends back to an unknown antiquity.
Hail the Goddess ~ Jai Mata Di !!!