Synonyms of 'liturgical'
ceremonialDictionary, ritual, solemna liturgical poem traditionally sung on the Sabbath
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Formal occasions are special occasions at which people wear smart clothes and behave according to a set of accepted rules.
They arranged a formal dinner after the play.
You can describe something as a ritual action when it is done in exactly the same way whenever a particular situation occurs.
Here, the conventions required me to make the ritual noises.
Thesaurus for liturgical from the Collins English Thesaurus
Liturgical things are used in or relate to church services.