Pope Pius XII instituted this feast in 1954 to conclude what was then the Octave of the Assumption. We remember that the Blessed Virgin reigns in heaven, together with her Son. She reigns not because she is equal to God but because she is mother of Christ the King. All her privileges come from her motherhood of Jesus and the unique role she played in our redemption. – CTS New Daily Roman Missal 2012, p 2933
