Nag Panchami (Naga Panchami Puja, Nagula Panchami), is the festival of snakes observed in Shravan month. In 2013, Nag Panchami date is August 11, Sunday.
In 2012, Naga Panchami date was July 23, 2012 (Monday). Nag Chaturthi Upvaas 2012 was on July 22 (Sunday). Nag Panchami festival dedicated to Naga devatas (Serpent Gods), falls on the Shravan Shukla Panchami (fifth day in Shukla paksha during Sawan month).
On the day of Naga Panchami, nine prominent Serpent Gods (Nagas or snake Gods) are fed with milk and worshipped by certain rituals and pujas. Ananta, Vasuki, Padmanabha, Sesha, Kambala, Shankhapala, Dhruthrashtra, Takshaka and Kaliya are the nine prominent Serpent Gods.
Slokam to remember all the nine names of Naga Devatas:
Anantam Vasukim Sesham Padmanabham cha Kambalam
Shankhapalam Dhartarashtram Taxakam Kaliyam thatha
Etani navanamani cha mahatmanam
The sloka means – the above mentioned 9 Naga devatas are most auspicious and important serpent gods.
Legend of Naga Panchami:
Nag Panchami is celebrated all over India, but on different dates as mentioned above. Naga Panchami commemorates various legends and stories. One of these legends tells us about the victory of Lord Sri Krishna on Serpent Kaliya on the day of Shravan Shukla Panchami.
Nag Panchami is also celebrated as Garuda Panchami. On Naga Panchami day, people of North India and East India observe Ashtanag Puja. Ashtanag Puja is dedicated to Goddess Manasa, who is also called as the Queen of Serpents. Read Nag Panchami Puja Procedure (Naga Panchami Vrat Vidhi) here.

Atreya Sarma Uppaluri
Jul 24. 2009
The name ‘Dhruthrashtra’ in the English translation has to be changed to ‘Dhartarashtra’ in consonance with that mentioned in the sloka quoted. These names are not synonymous; Dhartarashtra means son of Dhruthrashtra. Please carry out the correction.
NAVEEN KUMAR SANAGALA
Jul 26. 2009
Thanks alot Mr. Atreya. I will correct it.
shreyashwini
Aug 03. 2010
what to do on nag panchami. how to do nagpanchami puja
Ramesh
Apr 13. 2011
Thanks for the information.
N.T.V.KRISHNA
Feb 13. 2012
A very good cult of the lord is this service of the giving sacred information of festivals and other rituals.It is divine superb and outstanding
Albert
Jul 23. 2012
Isn’t wonderfully coincident that Ancient Egypt revered the royal Cobra Wadjet on the 5th day of the Lunation?
Albert
Jul 23. 2012
For 2012, July 23rd seems to be particularly significant from many religious perspectives. It is the Nag Panchami in the Hindu religion, falls within the Ramadan and occupies an important Zodiac node – Leo. Definitely, worth observing!
Madhul
Apr 02. 2013
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Sona
Apr 17. 2013
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Shrinath
Apr 21. 2013
HOW TO DO NAG PUJA
Pooja
May 01. 2013
anantam vasukim sesha all name in hindi words
Anika
May 11. 2013
Information of nagpanchami in marathi
Satyak
May 14. 2013
which date is krishna paksha nag panchmi 2013