Office of Liturgy

Liturgical Calendar

Archdiocese of Denver Liturgical Calendar & Notes for 2017

Catholics are obliged to attend Holy Mass on the following holy days of obligation in 2017:

  • Tuesday, August 15, 2017 Solemnity of the Assumption of the BVM
  • Wednesday, November 1, 2017 Solemnity of All Saints
  • Friday, December 8, 2017 Solemnity of the Immaculate Conception
  • Monday, December 25, 2017 Solemnity of the Nativity of Our Lord

Please note the following information:

On Sunday December 24, 2017 the Mass is of the 4th Sunday of Advent until 4:00 p.m. when the Advent Sunday is outranked by the Vigil Mass of the Solemnity of the Nativity of the Lord. It is not a “2-for-1” day in which a person can fulfill their 4th Sunday of Advent Obligation as well as the holy day obligation for Christmas at the 4:00 p.m. or subsequent Masses on December 24. Hence, a person will need to attend a Mass before 4:00 p.m. on December 24 to fulfill the Sunday obligation and then the Mass of Christmas after 4:00 p.m. or on December 25 to fulfill their holy day obligation

Since the Solemnity of Mary, The Holy Mother of God, January 1, 2018 falls on a Monday, it is not a holy day of obligation and therefore a vigil Mass does not need to be celebrated after 4:00 p.m. for the solemnity.

Liturgical Celebrations Proper to the Archdiocese of Denver:

Monday                May 15                  2017      Saint Isidore the Farmer (Obligatory Memorial)
Wednesday           October 4              2017      Saint Francis of Assisi (Feast)
Friday                    October 27            2017      Anniversary of Dedication of Cathedral (Feast)
Monday                November 6          2017      Blessed Rupert Mayer, S.J. (Obligatory Memorial)
Monday                November 13       2017      Saint Frances Xavier Cabrini (Feast)
Tuesday                 December 12        2017      Our Lady of Guadalupe (Feast)
Saturday                December 16       2017       Our Lady of the New Advent (Obligatory Memorial)


Special Commemorations and Days of Prayer Proper to the Archdiocese of Denver:

Sunday                  January 1              2017      World Justice and Peace
Saturday               January 22            2017      Human Rights and Equality
Monday                April 3                    2017      General Needs of Humankind
Monday                May 15                   2017      Harvest and Fruits of the Earth
Monday                May 29                  2017      Appointment, Archbishop Samuel J. Aquila (2012)
Tuesday                 July 18                  2017      Installation, Archbishop Samuel J. Aquila (2012)
Friday                    August 4                2017      Priests and Seminarians
Thursday               August 10             2017      Deacons and Candidates for the Diaconate
Thursday               August 24             2017      Episcopal Ordination, Archbishop Samuel J. Aquila (2001)
Fri.-Tues.               December 8-12   2017      Days of Prayer to the Blessed Virgin Mary*
*under the title of the Immaculate Conception, Principal Patroness of the Archdiocese of Denver.