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Solemnity of the Immaculate Conception of the Blessed Virgin Mary
December 8, 2015
This is a Holy Day of Obligation in the United States. Commemorates the fact that Mary, from the first moment of her conception, –by the singular grace of God and by virtue of the merits of Jesus Christ–was preserved from original sin. In 1846, Mary was proclaimed patroness of the United States under this title.