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Solemnity of the Immaculate Conception
December 8, 2023
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Why do we celebrate the Immaculate Conception?
We celebrate the Solemnity of the Immaculate Conception, a Holy Day of Obligation, on December 8.
In 1854, Pope Pius IX declared the dogma of the Immaculate Conception:
The Most Holy Virgin Mary was, in the very first moment of her conception, by a unique gift of grace and privilege of Almighty God and in view of the merits of Jesus Christ the Redeemer of mankind, preserved free from all stain of original sin.” (Ineffabilis Deus, Apostolic Constitution of Pope Pius IX on the Immaculate Conception)