Kuriakon

Kuriakon, also spelled Kyriakon, is a Greek term meaning "of the Lord" or "belonging to the Lord." It is used in Christian contexts to designate the Lord's Day and things associated with it. The etymology traces to kyrios, meaning "lord," combined with the suffix -ikon.

In early Christianity, Kyriakon or Kyriake hemera referred to Sunday, the day set aside for weekly worship in honor of the resurrection of Jesus. The phrase appears in patristic sources and liturgical texts as a designation for Sunday and the Sunday liturgy, distinguishing it from weekdays and other feasts. The word influenced later Latin and Greek liturgical vocabulary; in Latin Christianity the day was more commonly called dies dominicus, while Greek usage retained Kyriake.

In modern usage, the term survives primarily in scholarly discussions of liturgy, early Christian calendars, and Greek textual traditions. It is not widely used in contemporary everyday language of most Christian churches, where terms such as Sunday or the Lord's Day are preferred. Variants in transliteration include Kyriakon, Kyriakón, and Kyriake, reflecting Greek spelling and diacritics. The term may appear in the titles of historical liturgical manuscripts, scholarly editions, or in the names of institutions and publications that emphasize classical or patristic Greek heritage.