Indigenous Faith Day is observed in Arunachal Pradesh, India, every December 1. This official holiday was established to emphasize the importance of preserving the religion, culture, and languages of the indigenous tribes in the region. Arunachal Pradesh is known for its ethnic diversity, home to various tribes such as the Monpa, Tani, Mishmi, Tai, Singpho, and Naga. The religious landscape is equally varied, with around 30% of the population identifying as Christians, another 30% as Hindus, and others following traditional beliefs, Buddhism, Islam, Sikhism, and Jainism. The indigenous religions, particularly Donyi-Polo, which means "Sun-Moon" in Tani languages, are animistic and shamanic, focusing on the balance between these two elements. Celebrations on Indigenous Faith Day include religious ceremonies and colorful festivals that honor the rich cultural heritage of the state's indigenous tribes, highlighting the need to protect Donyi-Polo and other traditional religions.