| Date | Jestha Shukla Paksha Shashthi / Kumar Shashthi (June 1) |
| Duration | Single day |
| Observance | Cultural, environmental, and religious festival |
| Celebrated in | Kathmandu Valley, primarily Newar communities |
| Observing Communities | Newar community and Kathmandu Valley residents |
| Type of Event | Water purification and community festival |
| Purpose of Event | Clean water sources before monsoon season, honor water deities (Nagas), prevent waterborne diseases, and celebrate Kumar's birthday. |
| Holiday Status | Cultural observance (not an official public holiday) |
| First Observed in | Licchavi period (400-750 BCE), documented since King Yaksha Malla's inscription of 1510 BS (1453 CE) |
Quick Fact: Sithi Nakha is one of the oldest documented environmental conservation festivals in Nepal. A historical inscription from King Yaksha Malla in 1510 BS (1453 CE) required the completion of all water infrastructure maintenance and cleaning by Sithi Nakha, making it one of the earliest recorded examples of institutionalized water resource management in South Asian history.
Sithi Nakha, also known as Kumar Shashthi, is a uniquely Newar festival that blends spiritual celebration with practical environmental stewardship. Observed on the sixth day of the bright lunar fortnight (Shukla Paksha Shashthi) of the Jestha month, this ancient festival celebrates the birthday of Kumar (also called Kartikeya or Skanda, the elder son of Lord Shiva and Parvati) while simultaneously serving as the traditional occasion for cleaning and maintaining water sources across the Kathmandu Valley before the monsoon season arrives.
Sithi Nakha dates back to the Licchavi period (400-750 BCE), making it one of the oldest surviving Newar cultural festivals. A remarkable historical inscription from King Yaksha Malla's reign in 1510 BS (1453 CE) explicitly required that all water infrastructure maintenance, wells, ponds, and dhunge dharas (stone water spouts), be completed by Sithi Nakha. This royal decree demonstrates how deeply the festival was institutionalized as a public health and water management event. Before the monsoon rains arrive, water sources reach their lowest levels, making it the ideal time to clean, repair, and consecrate them. The festival also honors Nagas, the serpent water deities of Hindu and Newar tradition who are believed to govern and protect water resources.
This festival is observed to:
Clean and maintain wells, ponds, dhunge dharas, and community water sources before the monsoon season.
Honor the Nagas (water guardian deities) and ensure the purity and abundance of water resources.
Prevent waterborne diseases by systematically cleaning water infrastructure before the disease-prone monsoon season.
Celebrate Kumar's birthday with community participation, traditional food, and devotional offerings.
Communities observe Sithi Nakha through coordinated environmental and cultural activities:
Systematic cleaning of wells, ponds, water spouts, and community water infrastructure by neighborhood groups.
Offerings and prayers to Nagas, serpent water deities, at water sources for their continued protection and blessing.
Preparation and sharing of traditional Newar foods: Bara (lentil pancakes) and Chatamari (rice crepe pancakes).
Community gatherings at water sources and cultural celebrations acknowledging the sacred role of water.
Rituals and prayers acknowledging the deep sacred relationship between the Newar community and water.
Sithi Nakha holds profound cultural and environmental significance:
It represents one of the oldest examples of institutionalized water conservation and public health practice in Nepal.
It reflects the sophisticated indigenous Newar environmental knowledge of water management and seasonal cycles.
It maintains the essential connection between spiritual practice and practical community welfare.
It ensures water purity and infrastructure readiness before the disease-prone monsoon season begins.
It promotes community cooperation in water resource management as a shared communal responsibility.
Sithi Nakha is a living demonstration that ancient wisdom can be profoundly practical. For over fifteen centuries, the Newar community has used this festival to clean their waters, honor their water deities, celebrate their divine patron Kumar, and fortify their communities against the health risks of monsoon season. In an era of increasing water scarcity, Sithi Nakha's message of sacred stewardship of water resources is more relevant than ever.