Based on dictionary definitions of the words "civic" and "ritual" and the given term's usage, civic ritual would have to mean a social norm or a set of responsibilities that a citizen of a country is obliged to follow. An example of this would in the USA would be voting, which is commonly regarded as a duty of the citizen. Perhaps being knowledgeable in the nation's history or government system would also count, because many people consider that something any citizen should do.