Christ the King Sunday is the final Sunday of the liturgical year — the last Sunday before Advent — confessing Christ’s sovereign kingship over all earthly powers, governments, and rulers. The feast was instituted by Pope Pius XI in 1925 as a direct theological answer to the secular nationalisms of the early twentieth century (Mussolini’s fascism, Lenin’s communism), and was adopted in Protestant lectionaries thereafter. Its texts gather around Daniel 7:13-14, Revelation 1:5-8, and the cross-side proclamation "This is the King of the Jews" (Luke 23:38). The Sunday rounds the Christian year before Advent begins anew — closing one cycle with the kingship proclaimed, and opening the next with the King’s coming awaited.