Feast of the Immaculate Conception, December 8 USA.
Pope Pius IX, Ineffabilis Deus
“We declare, pronounce, and define that the doctrine which holds that the most Blessed Virgin Mary, in the first instance of her conception, by a singular grace and privilege granted by Almighty God, in view of the merits of Jesus Christ, the Savior of the human race, was preserved free from all stain of original sin, is a doctrine revealed by God and therefore to be believed firmly and constantly by all the faithful.”
In other words, the Immaculate Conception was not a precondition for Christ’s act of redemption but the result of it. It is the concrete expression of God’s love for Mary, who gave herself fully, completely, and without hesitation to His service.
Sidewalks Chalk 