QUEENSHIP OF MARY
Why do we celebrate the Queenship of Mary?
Catholics celebrate the Queenship of Mary because her Divine Son is King. Pope Pius XII, having declared the dogma of the Assumption, that “the Immaculate Mother of God . . . was assumed body and soul into heavenly glory,” then established the feast of her Queenship. He set the date for the octave (8th day) after the Solemnity of the Assumption, that is, August 22nd each year.
In his encyclical Ad Caeli Reginam, the Pope proclaimed,
We are instituting a feast so that all may recognize more clearly and venerate more devoutly the merciful and maternal sway of the Mother of God. We are convinced that this feast will help to preserve, strengthen and prolong that peace among nations which daily is almost destroyed by recurring crises. Is she not a rainbow in the clouds reaching towards God, the pledge of a covenant of peace?