Answer Wai Khru Ceremony is a popular tradition in Thailand, since the ancient practice. Wai Khru Ceremony is a Thai ritual in which students pay respects to their teachers in order to express their gratitude and formalize the student–teacher relationship. But, for the Teacher's Day ( January 16 of each year) as the day of the ceremony another teacher. Associates are those teachers who teach students today . Have attending to commemorate the endow academic teachers . And a have reciting the Pali may be presided over by a senior teacher.