 The most important festival of the Tagins is the Si-Donyi Festival, which involves the veneration of the earth (si) and the sun (donyi).Si-Donyi is celebrated from 3 to 6 January every year.It is celebrated as a new year where the "nyibu" (local priest) presides over and performs all the rituals with chanting of Uuyu Benam (celestial chants).