observance
ob.ser.vance \-v*n(t)s\ n 1a: a customary practice or ceremony 1b: a rule governing members of a religious order 2: an act or instance of following a custom, rule, or law 3: an act or instance of watching : OBSERVATION
Webster's English Dictionaryob.ser.vance \-v*n(t)s\ n 1a: a customary practice or ceremony 1b: a rule governing members of a religious order 2: an act or instance of following a custom, rule, or law 3: an act or instance of watching : OBSERVATION