Nagpanchami Naga is regarded as a mythical serpent representing water. Therefore, the belief is lakes, ponds and other waterbodies are inhabited by Nagas. Whenever there is a drought special worshipping of Nagas are performed in order to get rains. On Nagpanchami, the day dedicated to Nagas every Hindu household worships Nagas. In the morning, after purifying the house and themselves, fasting the householders paste the pictures of Nagas by the doorways and do puja. On this day people visit at Taudaha, the lake inhabited by Karkot Naga-the king of the Nagas. A festival occurs at Changu Narayan, the oldest temple in the valley dedicated to Lord Visnu, the protector. http://www.angelfire.com/trek/myglorynepal/festival.htm In Malabar, the Nagarapanchimi day is observed on the fifth of Sravana when the star Aslesha is in the ascendant. On this day, the Nambutiris worship the snake-god by bathing the god (most likely a stone or metal image of ophidian deity) in milk and paying obeisances to the divine being. http://www.theholidayspot.com/nag_panchami/celebration_of_nag_panchami.htm Ashlesha is also called Ayilyam 5 Serpents