Advent
St. Ambrose: Dec. 7
The Solemnity of the Immaculate Conception: Dec. 8
The Solemnity of the Blessed Virgin Mary, Mother of God: Jan. 1
The Feast of the Most Holy Name of Jesus: Jan. 3
The Feast of the Baptism of our Lord: Between Jan 7 and January 13 on the Sunday after Epiphany, or the Monday after if Epiphany is transferred to the same Sunday.
St. Thomas Aquinas: Jan. 28
The Feast of the Presentation (Candlemas): Feb. 2
The Feast of Our Lady of Lourdes: Feb. 11
St. Valentine: Feb. 14
Lent
St. Patrick: Mar. 17
The Solemnity of St. Joseph: Mar. 19
The Solemnity of the Annunciation: Mar 25, unless during Holy Week
St. George: April 23
Easter
The Feast of Divine Mercy: Sunday after Easter
The Solemnity of Pentecost (Whitsunday): 50 days after Easter
The Solemnity of the Most Holy Trinity: Sunday after Pentecost
Trinitytide (Ordinary Time):
The Solemnity of the Most Holy Body and Blood of Christ (Corpus Christi): Thursday or Sunday after Trinity Sunday
St. Athanasius: May 2
The Feast of Our Lady of Fatima: May 13
The Nativity of Saint John the Baptist: June 24
The Solemnity of the Most Sacred Heart of Jesus: 19 days after Pentecost on a Friday between June 29th and July 2nd
St. Mary Magdalene: July 22
The Feast of the Transfiguration: Aug. 6
St. Dominic: Aug. 8
The Solemnity of the Assumption of Mary: Aug. 15
The Feast of the Queenship of Mary (Coronation): Aug. 22
The Feast of the Nativity of Mary: Sep. 8
The Feast of the Most Holy Name of Mary: Sep. 12
The Feast of the Exaltation of the Holy Cross: Sep. 14 or the closest Sunday
The Feast of Our Lady of Sorrows: Sep. 15
St. Hildegard: Sep. 17
St. Francis: Oct. 4
The Feast of Our Lady of the Rosary: Oct. 7
The Miracle of the Sun by Our Lady of Fatima: Oct. 13
The Solemnity of All Saints: Nov. 1
St. Andrew: Nov. 30
The Solemnity of Our Lord Jesus Christ, King of the Universe (Christ the King): Last Sunday before Advent