Holydays of Obligation Part 1. In addition to Sunday, the Holydays of Obligation for the United States of America are six. However, in the Province of Chicago, The Ascension of the Lord has been permanently transferred to the following Sunday. The remaining Holydays are: 01 January: The Octave Day of the Nativity of the Lord: Solemnity of Mary, the Holy Mother of God 15 August: The Assumption of the Blessed Virgin Mary, Solemnity 01 November: All Saints, Solemnity 08 December: The Immaculate Conception of the Blessed Virgin Mary, Solemnity 25 December: The Nativity of the Lord (Christmas), Solemnity Holydays of Obligation Part 2. The NCCB decree of 13 December 1991, confirmed by the Apostolic See on 04 July 1992, stipulates that whenever 01 January, 15 August, or 01 November falls on a Saturday or on a Monday, the precept to attend Mass is abrogated. You can view the annual diocesan calendar at www.dio.org/worship/liturgical-year.html. Some Key Diocesan Liturgies in Spring 2017: Ash Wednesday Lent begins, March 01, 2017 Election and Call to Continuing Conversion First Sunday of Lent Saturday, March 04, 2017 at 7:00 PM parishes within 50 miles of cathedral; Sunday, March 05, 2017 at 2:30 PM parishes beyond 50 miles of cathedral. Chrism Mass Tuesday of Holy Week, April 11, 2017 at 6:30 PM. Ordination of Deacons (transitioning to priesthood) Newly set annual day: Friday within the Octave of Easter, April 21, 2017 at 6:30 PM. Ordination of Priests Saturday of Memorial Weekend, May 27, 2017 at 10:30 AM.