All SUNDAYS are obligatory for the faithful to participate in the Mass.
January 1st - Holy Day of Obligation Solemnity of Mary, the Holy Mother of God January 6th Solemnity of the Epiphany of the Lord January 13th The Baptism of the Lord
February 26th Ash Wednesday
March 19th Solemnity of Saint Joseph, Spouse of the Blessed Virgin Mary March 25th Solemnity of the Annunciation of the Lord
April 5th Palm Sunday of the Passion of the Lord April 9th Holy Thursday April 10th Good Friday April 11th Holy Saturday April 12th Easter Sunday of the Resurrection of the Lord April 19th Divine Mercy Sunday
May 21st - Holy Day of Obligation The Ascension of Our Lord May 31st Pentecost Sunday
June 16th Solemnity of the Most Holy Trinity June 14th Solemnity of the Most Holy Blood of Christ (Corpus Christi) June 24th Solemnity of the Nativity of Saint John the Baptist June 28th Solemnity of the Most Sacred Heart of Jesus June 29th Solemnity of Saints Peter and Paul, Apostles
August 15th - Holy Day of Obligation Solemnity of the Assumption of the Blessed Virgin Mary
November 1st - Holy Day of Obligation All Saints Day November 2nd The Commemoration of All the Faithful Departed (All Souls Day) November 24th Solemnity of Our Lord Jesus Christ, King of the Universe (Christ the King) November 26th Thanksgiving
November 29th First Sunday of Advent December 9th - Holy Day of Obligation The Solemnity of the Immaculate Conception of the Blessed Virgin Mary December 25th - Holy Day of Obligation The Nativity of the Lord (Christmas)