From Longman Dictionary of Contemporary Englishobservanceob‧ser‧vance /əbˈzɜːvəns $ -ɜːr-/ noun 1 [uncountable]OBEY when someone obeys a law or does something because it is part of a religion, custom, or ceremonyobservance of the observance of a peace agreement the strict observance of Islam the Memorial Day observance2 [countable]RR something you do as part of a ceremony, especially a religious ceremony religious observances
Examples from the Corpus
observance• Veterans Day observances• Meticulous observance of constitutional principle is to be tempered by regard for political effectiveness.• In 1976, it became a monthlong observance.• He said bluntly that he was a great advocate of a proper observance of status and rank.• Figures of religious observance are harder to come by.• Now that religious observance was officially discouraged only a few hundred worshippers were present.• The Cocopa and the Hopi respectively exemplify extremes of emphasis and of de-emphasis in the observance of funeral rites.• Consistency and sincerity are very important in the various observances of the rites, ceremonies, duties, and laws.observance of• the observance of human rights 