"Thai Amavasai" refers to the new moon day (Amavasai) that falls during the Tamil month of Thai. Thai is the tenth month in the Tamil calendar and typically spans from mid-January to mid-February in the Gregorian calendar. Like other Amavasai days in the Tamil calendar, Thai Amavasai is considered significant in terms of religious and spiritual observances. During this time, people may engage in rituals and ceremonies, including offerings and prayers to honor their ancestors and seek blessings for the well-being of their families.