Which religion's followers celebrate the festival of 'Sangken' in Arunachal Pradesh?

Sangken is a Buddhist festival celebrated primarily in Arunachal Pradesh by Theravada Buddhist communities like the Tai Khamti and Singpho. Similar to Thailand's Songkran Festival, it marks the traditional New Year in April according to the Theravada Buddhist calendar. The festival involves ceremonial bathing of Buddha idols and the ritual sprinkling of water on others as a gesture of purification, goodwill, and peace. This tradition is also observed in parts of Assam and several Southeast Asian countries under various names.