Nag Panchami, a festival dedicated to the worship of serpents, holds unique cultural and religious importance in Madhyapur Thimi. Celebrated on the fifth day of the bright half of the lunar month of Shrawan, this festival is marked by reverence for Nagas (serpent deities) who are believed to protect against drought, floods, and other natural calamities.

In Thimi, locals observe Nag Panchami with rituals that honor the ancient relationship between humans and nature. Early in the morning, families post images of Nagas above doorways to ward off evil and invoke the protective powers of these deities. Devotees visit temples or sacred serpent shrines, offering milk, rice, flowers, and grains as symbols of respect and gratitude. By honoring Nagas, residents seek blessings for water abundance and agricultural prosperity, both vital for this traditionally agrarian community.

The festival also has a profound environmental message, reminding people of the need to protect natural water sources and their ecosystems. Many in Thimi recognize the importance of preserving rivers, ponds, and wetlands, which are homes to real snakes and essential to maintaining the ecological balance.

In Madhyapur Thimi, Nag Panchami celebrates the bond between the community and nature, blending faith with ecological awareness and cultural preservation.