Answer: observance

AnswerCrossword Clue
OBSERVANCECeremonial celebration
observancethe keeping of a customary practice, rite, or ceremony also OBSERVANCY
observanceThe action of watching or noticing something
observanceA rule to be followed by a religious order
observanceThe action or practice of fulfilling or respecting the requirements of law, morality, or ritual
observanceRespect; deference
observanceAn act performed for religious or ceremonial reasons