In the Roman Catholic Church, the Holy Days of Obligation are the days, other than Sundays, on which the faithful are required to attend Mass. The 1983 Code of Canon Law standardized ten days to be observed as Holy Days of Obligation throughout the Church. These days are:

• The Immaculate Conception (December 8)
• Christmas (Feast of the Nativity of Our Lord) (December 25)
• St. Mary, the Mother of God formerly the Feast of the Circumcision of Christ (January 1)
• Epiphany (January 6)
• St. Joseph (March 19)
• St. Peter and St. Paul (June 29)
• The Assumption of the Blessed Virgin Mary (August 15)
• All Saints (November 1)
• The Ascension of Our Lord (39 days after Easter; 40th day of Eastertide)
• Corpus Christi (60 days after Easter)

Red vestments are worn at

Observance by country

The conference of bishops in a particular country or region may suppress the observance of these days, or transfer it to another day, with the permission of the Vatican. In some cases the obligation is observed during the following weekend mass. At times if a Holy Day is on a Monday or Saturday the observance will be held during regular weekend mass. They may also make the feast day of the country's patron saint a holy day of obligation.

Australia

• Christmas
• The Epiphany
  
  
  
  (observed on following Sunday)
• The Assumption of the B.V.M.
• The Ascension of Our Lord (observed on following Sunday)
• Corpus Christi (observed on following Sunday)

Belgium

• Christmas
• The Epiphany (observed on the Sunday after January 1)
• The Assumption of the B.V.M.
• The Ascension of Our Lord
• Corpus Christi (observed on the following Sunday)
• All Saints

Canada

• Christmas
• St. Mary, the Mother of God
• The Epiphany (observed on the following Sunday)
• The Ascension of Our Lord (observed on the following Sunday)
• Corpus Christi (observed on the following Sunday)

England and Wales

• Christmas
• The Epiphany
• SS. Peter & Paul
• The Assumption of the B.V.M.
• All Saints
• The Ascension of Our Lord
• Corpus Christi

Ireland

• The Immaculate Conception
• Christmas
• The Epiphany
• St. Patrick's Day
• The Assumption of the B.V.M.
• All Saints

The Netherlands

• Christmas
• The Ascension of Our Lord

Poland

• Christmas
• St. Mary, the Mother of God
• Epiphany
• The Assumption of the B.V.M.
• All Saints
• The Ascension of Our Lord (observed on the following Sunday)
• Corpus Christi

United States

By Decree of the National Conference of Catholic Bishops (now the United States Conference of Catholic Bishops), promulgated November 17, 1992 by the Most Reverend Daniel Edward Pilarczyk, Archbishop of Cincinnati, and confirmed by the Apostolic See on July 4, 1992, the Holy Days of Obligation for Latin Rite Catholics in the United States are:

• The Immaculate Conception
• The Nativity of Our Lord (Christmas)
• St. Mary, the Mother of God
• The Ascension of Our Lord (observed on the following Sunday in many dioceses)
• The Assumption of the Blessed Virgin Mary
• All Saints' Day

However, whenever January 1, the solemnity of Mary, Mother of God, or August 15, the solemnity of the Assumption, or November 1, the solemnity of All Saints, falls on a Saturday or Monday, the precept to attend Mass is abrogated.

See also

• Liturgical year
• Moveable feast

• Ash Wednesday Verplichte feestdag

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