Here is some background information on this feast day:
On December 11, 1925, towards the end of that Holy Year, Pope Pius XI instituted this liturgical celebration as a feast ranked as a Double of the First Class with his encyclical Quas Primas.
The title of the feast was "D. N. Jesu Christi Regis" (Our Lord Jesus Christ the King), and the date was "the last Sunday of the month of October - the Sunday, that is, which immediately precedes the Feast of All Saints".
In Pope John XXIII's 1960 revision of the Calendar, the date and title remained the same and, in the new simpler ranking of feasts, it was classified as a feast of the first class.
In 1969, Pope Paul VI gave the celebration a new title: "D. N. Iesu Christi universorum Regis" (Our Lord Jesus Christ King of All). He also gave it a new date: the last Sunday in the liturgical year, before a new year begins with the First Sunday in Advent, the earliest date for which is November 27. Through this choice of date "the eschatological importance of this Sunday is made clearer". He assigned to it the highest rank, that of "Solemnity".
As happens with all Sundays whose liturgies are replaced by those of important feasts, the prayers of the Sunday on which the celebration of Christ the King falls are used on the ferias (weekdays) of the following week. The Sunday liturgy is thus not totally omitted.
The title of the feast was "D. N. Jesu Christi Regis" (Our Lord Jesus Christ the King), and the date was "the last Sunday of the month of October - the Sunday, that is, which immediately precedes the Feast of All Saints".
In Pope John XXIII's 1960 revision of the Calendar, the date and title remained the same and, in the new simpler ranking of feasts, it was classified as a feast of the first class.
In 1969, Pope Paul VI gave the celebration a new title: "D. N. Iesu Christi universorum Regis" (Our Lord Jesus Christ King of All). He also gave it a new date: the last Sunday in the liturgical year, before a new year begins with the First Sunday in Advent, the earliest date for which is November 27. Through this choice of date "the eschatological importance of this Sunday is made clearer". He assigned to it the highest rank, that of "Solemnity".
As happens with all Sundays whose liturgies are replaced by those of important feasts, the prayers of the Sunday on which the celebration of Christ the King falls are used on the ferias (weekdays) of the following week. The Sunday liturgy is thus not totally omitted.
It is also celebrated by the Legionaries of Christ order of priests and its associated international lay ecclesial movement, Regnum Christi, as "Regnum Christi Day". Its members are invited to spiritually renew their decision to give their lives to Christ out of love, and to do everything they can to make the Kingdom of Christ a strong and growing reality in society.