III. When is the Liturgy Celebrated?

From The Catechism of the Catholic Church

1175
The
Liturgy of the Hours is intended to become the prayer of the whole People of
God. In it Christ himself “continues his priestly work through his
Church.”⁵⁰ His members participate according to their own place in
the Church and the circumstances of their lives: priests devoted to the
pastoral ministry, because they are called to remain diligent in prayer and the
service of the word; religious, by the charism of their consecrated lives; all
the faithful as much as possible: “Pastors of souls should see to it that
the principal hours, especially Vespers, are celebrated in common in church on
Sundays and on the more solemn feasts. the laity, too, are encouraged to recite
the divine office, either with the priests, or among themselves, or even
individually.”⁵¹

PART TWO: THE CELEBRATION OF THE CHRISTIAN MYSTERY

SECTION ONE THE SACRAMENTAL ECONOMY
- CHAPTER TWO THE SACRAMENTAL CELEBRATION OF THE PASCHAL MYSTERY
  - Article 1 CELEBRATING THE CHURCH’S LITURGY
    - III. When is the Liturgy Celebrated?

From The Catechism of the Catholic Church – rosary.team