In Catholicism and most sects of Protestantism, the "Lord's Day" (Greek Κυριακή) is considered to be on Sunday, the first day (and "eighth day"). Communal worship, including the Holy Mysteries, may take place on any day, but a weekly observance of the resurrection is made consistently on Sunday. Western Christianity sometimes refers to the Lord's Day as a "Christian Sabbath", distinct from the Hebrew Sabbath, but related in varying manner.