"Because the virgin Mary was raised to such a lofty dignity as to be the mother of the King of kings,
it is deservedly and by every right that the Church has honored her with the title of 'Queen'."
St. Alphonsus Ligouri
On October 11, 1954, His Holiness, Pope Pius XII, in his encyclical letter, "Ad Caeli Reginam" decreed and instituted the feast of the Queenship of Mary to be celebrated throughout the world every year. Likewise, he decreed that on that feast "there be renewed the consecration of the human race to the Immaculate Heart of the Blessed Virgin Mary."
from: St. Joseph WEEKDAY MISSAL, volume 2