Can. 1244 §1 Only the supreme ecclesiastical authority can establish, transfer or suppress holydays or days of penance which are applicable to the universal Church, without prejudice to the provisions of Can. 1246 §2.
§2 Diocesan Bishops can proclaim special holydays or days of penance for their own dioceses or territories, but only for individual occasions.
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Can. 1246 §1 The Lord’s Day, on which the paschal mystery is celebrated, is by apostolic tradition to be observed in the universal Church as the primary holyday of obligation. In the same way the following holydays are to be observed: the Nativity of Our Lord Jesus Christ, the Epiphany, the Ascension of Christ, the feast of the Body and Blood of Christ, the feast of Mary the Mother of God, her Immaculate Conception, her Assumption, the feast of St Joseph, the feast of the Apostles SS Peter and Paul, and the feast of All Saints.
§2 However, the Episcopal Conference may, with the prior approval of the Apostolic See, suppress certain holydays of obligation or transfer them to a Sunday.