lit·ur·gy
/ˈlɪtɚʤi/ noun plural lit·ur·gies
: a fixed set of ceremonies, words, etc., that are used during public worship in a religion [count] ▪ studying the liturgies of different religions [noncount] ▪ He was studying Christian liturgy.
— li·tur·gi·cal
/ləˈtɚʤɪkəl/ adjective always used before a noun
▪ The church used Latin as the liturgical language. ▪ the liturgical calendar [=a list of the important holy days in a religion]