The day highlights the importance of the Himalayan ecosystem and its conservation.
It was first declared in Uttarakhand in 2015 to promote Himalayan conservation, sustainable development and community participation.
The Hindu Kush Himalaya (HKH) is an important source of water for major rivers such as the Indus, Ganga and Brahmaputra.
The International Centre for Integrated Mountain Development (ICIMOD) Snow Update 2026 reported 27.8% lower snow persistence than average, with 10 of 12 major river basins showing below-normal snow persistence.
Glacier retreat can reduce long-term natural water storage and increase risks such as Glacial Lake Outburst Floods (GLOFs).