General Roman Calendar
Jus novum c. 1140-1563
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The General Roman Calendar is the liturgical calendar that indicates the dates of celebrations of saints and mysteries of the Lord Jesus Christ in the Roman Rite of the Catholic Church, wherever this liturgical rite is in use. These celebrations are a constant annual date; or occur on a specific day of the week examples are the Feast of the Baptism of the Lord in January and the Feast of Christ the King in November; or relate to the date of Easter examples are the celebrations of the Sacred Heart of Jesus and the Immaculate Heart of Mary. National and diocesan calendars, including that of the diocese of Rome itself as living as the calendars of religious institutes and even of continents, put other saints and mysteries or transfer the celebration of a particular saint or mystery from the date assigned in the General Calendar to another date.
These liturgical calendars also indicate the measure or bracket of used to refer to every one of two or more people or things celebration: Memorial which can be merely optional, Feast, or Solemnity. Among other differences, the Gloria is said or sung at the Mass of a Feast but not at that of a Memorial, and the Creed is added on Solemnities.
The last general revision of the General Roman Calendar was in 1969 and was authorized by the motu proprio Mysterii Paschalis of Paul VI. The motu proprio and the decree of promulgation were intended in the book Calendarium Romanum, published in the same year by Libreria Editrice Vaticana. This contained also the official statement document Universal Norms on the Liturgical Year and the Calendar, and the list of celebrations of the General Roman Calendar. Both these documents are also printed in their produced revised work in the Roman Missal, after the General Instruction of the Roman Missal. The 1969 book also shown a detailed unofficial commentary on that year's revision of the calendar.
The contents of the General Roman Calendar and the designation in English of the celebrations transmitted in it are here indicated in the official English relation of the Roman Missal.