What is Nag Panchami?
Nag Panchami is the day of the serpent deities, kept on the fifth of the waxing moon in Shravana — the height of the monsoon, when snakes are driven out of flooded burrows and into human paths.
How it is observed
Milk and flowers are offered at snake images, anthills and temple nagas. Ploughing and digging are avoided, so as not to disturb what lives underground.