High Altar, Church of Saint John Cantius, Chicago.
Text from The Saint Andrew Daily Missal,
unless stated otherwise.
The Ecclesiastical Year begins on The First Sunday of Advent and ends on the Saturday following The Twenty-Fourth Sunday After Pentecost.
It is composed of Liturgical Seasons, or Times.
THE TEMPORAL CYCLE, or, PROPER OF THE TIME, reveals
Our Lord to us in the Traditional setting of the
great mysteries of our Holy Religion.
Simultaneously with this TEMPORAL CYCLE, is a secondary one, called THE SANCTORAL CYCLE, or, PROPER OF THE SAINTS, because it is composed of all the Feasts of those Blessed Souls in which the work of the redemption is already accomplished.

Pope Saint Pius X, in his Bull “Divino Afflatu”, points out the order to be observed in the Celebration of the Feasts of Saints which, in the course of the year, come in among those of the Cycle of the Mysteries of Our Lord’s life.
The first place is given to The Blessed Virgin Mary.
Then come the Holy Angels.
Next, according to the greater or less share
they have in the plan of The Incarnation:
Saint John the Baptist, the Precursor of The Messias;
Saint Joseph;
Saint Peter and Saint Paul;
and the other Apostles, whose Feasts have
always been Celebrated with special Solemnity.
The Feasts of National Saints, Patrons of Dioceses and Parishes, come in the First Rank because of special
gratitude due to them.
Next, come:
Feasts of Dedication of Churches;
Martyrs;
Pontiffs, i.e., Popes or Bishops;
Doctors, i.e., Fathers of The Church,
the authorised interpreters of The Word of God;
Confessors, i.e., those who, by their life or doctrine,
have Confessed Christ;
Virgins and other Holy Women.
The most important and the most numerous Solemnities of
this Cycle, especially those of the Time after Pentecost, bring into full light the Cycle of Christ, for it is by Him that the
World must be renewed: “Instaurare Omnia In Christo”.
[Editor: The following is taken from “Catholic Insight”
[“Instaurare Omnia In Christo” was Pope Saint Pius X’s chosen Motto — “To Restore All Things In Christ” — one
to which he lived admirably, reforming The Church
from the inside out: Soon after being elected, he penned
“Tra le Sollecitudini”, (22 November 1903), re-instating Gregorian Chant and Polyphony and the Solemn Splendour of Liturgy and The Mass.
[Against the dour rigorism of Jansenism, he promoted
daily reception of Holy Communion – nearly unheard of –
and clarified the simple requirements to receive – at the Age
of Reason, and being free from Mortal Sin, that The Bread of Life is Medicine for Sin, and Supernatural Sustenance for Eternal Life, and not a reward for being virtuous].
Resting one upon the other, these two Cycles form, as it were, an immense Monstrance set with precious stones. In the centre is the Host, or The Mass of The Faithful with the three parts which constitute it;
The Offertory;
The Consecration;
The Communion.
Around it is The Mass of The Catechumens, which varies every day, whereby at the Altar, as with luminous rays, we are shown the different Mysteries on each Sunday and Solemnity of the Proper of the Time. Then, in the intervals left free, like lesser rays, shine the Feasts in honour of the Saints.
The Church carries this Divine Sun through the World
in all times, raises it daily toward Heaven in her Liturgical Worship, that, by it, we may offer to God an ever-renewed homage of our gratitude, and receive from it the treasures
of Grace and Holiness.
The Occurrence and Concurrence of Feasts.
In this simultaneous movement of the Temporal
and Sanctoral Cycles, it happens that Feasts of
the Proper of the Time and those of the Proper
of the Saints fall upon the same day.
This is called “Occurrence of Feasts”.
When the Second Vespers of a Feast coincide
with the First Vespers of the following Feast,
it is called “Concurrence of Feasts”.
It should be noted that First Vespers are said on the
Eve of a Feast and the Second Vespers on the Feast, itself.
When two Feasts “Occur”, the lesser
Feast gives place to the greater Feast.
When two Feasts “Concur”, the greater Feast
supersedes the lesser Feast, and if they are of
the same degree (Rank), they share Vespers.