from Modern Catholic Dictionary by John A. Hardon, S.J. Doubleday & Co., Inc. Garden City, NY 1980
Immaculate Conception. Title of the Blessed Virgin as sinless from her first moment of existence. In the words of Pope Pius IX's solemn definition, made in 1864, "The most holy Virgin Mary was, in the first moment of her conception, by a unique gift of grace and privilege of almighty God, in view of the merits of Jesus Christ the Redeemer of mankind, preserved free from all stain of original sin." This means that since the first moment of her human existence the mother of Jesus was preserved from the common defect of estrangement from God, which humanity in general inherits from the sin of Adam. Her freedom from sin was an unmerited gift of God or special grace, and an exception to the law, or privilege, which no other created person has received.
Neither the Greek nor Latin Fathers explicitly taught the Immaculate Conception, but they professed it implicitly in two fundamental ways. Mary, they said, was most perfect in purity of morals and holiness of life. St. Ephrem (c. 306-73) addressed Christ and Mary with the words "You and Your mother are the only ones who are totally beautiful in every way. For in You, O Lord, there is no stain, and in Your mother no stain." Mary was described as the antithesis of Eve. Again in Ephrem, "Mary and Eve [were] two people without guilt. Later one because the cause of our death, the other cause of our life." While implicit in the early writers, the Immaculate Conception had to be clarified before becoming explicit dogma. Main credit for this goes to the Franciscan John Duns Scotus (c. 1264-1308), who introduced the idea of pre-redemption in order to reconcile Mary's freedom from original sin with her conception before the coming of Christ. (Etym. Latin im-, not + maculare, to stain.)
Yes, Ascension Thursday is a holy day of obligation in the Catholic Church, meaning that Catholics are required to attend Mass on this day.
.Roman Catholic AnswerNo, St. Stephen's (the day after Christmas) is not a Holy Day of Obligation.
.Roman Catholic AnswerNo.
Roman Catholic AnswerA Holy Day, normally called a "Holy Day of Obligation" is a day on which Catholics must attend Mass, and refrain from any unnecessary work.
Yes, Christmas is a holy day of obligation in the Catholic Church, meaning that Catholics are required to attend Mass on this day to celebrate the birth of Jesus Christ.
Roman Catholic AnswerBecause it has never been so designated by the Holy See as such.
Yes in fact it still is
Because Christ rose from the dead on the first day of the week.
Yes, the Solemnity of the Immaculate Conception is a Holy Day of Obligation everywhere in the Catholic Church.
Roman Catholic AnswerSt. Patrick's Day is a Holy Day of Obligation for Catholics who live in Ireland as it is the feast day of their patron saint.
Roman Catholic AnswerNo.
No, Christmas Day is not considered a holy day of obligation in the Catholic Church. However, it is a major feast day and is widely celebrated by Catholics around the world.