The Liturgical Calendar
How the Catholic Church reads the Bible over three years — and why.
Why Three Cycles?
Before the Second Vatican Council (1962–65), the Roman Rite used a single-year lectionary. Each Sunday’s readings rotated on a one-year cycle, which meant that large portions of the New Testament — and almost all of the Old Testament — were never heard at Sunday Mass.
The Council’s Constitution on the Sacred Liturgy, Sacrosanctum Concilium §51, mandated that “the treasures of the Bible are to be opened up more lavishly, so that richer fare may be provided for the faithful at the table of God’s word.”
The result was the Ordo Lectionum Missae of 1969, revised in 1981 — a three-year Sunday cycle (Years A, B, and C) and a separate two-year weekday cycle (Years I and II). The Sunday cycle assigns one of the three Synoptic Gospels to each year, with John woven throughout all three years in Lent, Easter, and key feasts. The result: a congregation that attends Mass every Sunday over three years hears the heart of the entire New Testament, substantial portions of the Old Testament, and the complete arc of Salvation History.
This lectionary is now used by Catholics worldwide and has been widely adopted (with adaptations) by Anglican, Lutheran, Methodist, and other Protestant communities — one of the most significant ecumenical fruits of Vatican II.
The Three Sunday Cycles
Year A
Gospel of Matthew
Fulfillment, the Church, the Kingdom of Heaven
Advent 2025 – Christ the King 2026
Year B
Gospel of Mark
Urgency, discipleship, the cost of following Jesus
Advent 2026 – Christ the King 2027
Year C
Gospel of Luke
Mercy, the poor, joy, prayer, the Holy Spirit
Advent 2024 – Christ the King 2025
Year A — Matthew
Year A centres on the Gospel of Matthew, written primarily for a Jewish-Christian community around AD 80–90. Matthew presents Jesus as the new Moses who fulfils the Law and the Prophets (Matt 5:17). The Sermon on the Mount (chapters 5–7), the five great discourses, and the parables of the Kingdom give Year A its character: Jesus as Teacher and King. The Church as a visible community in the world is a distinctively Matthean theme (Matt 16:18; 18:15-20). Ordinary Time after Pentecost moves chapter by chapter through Matthew's narrative, making Year A a sustained read of the first Gospel.
Year B — Mark
Year B is built around the Gospel of Mark — the shortest, most urgent, and most vivid of the four Gospels, composed around AD 65-70. Mark's characteristic word is "immediately" (εὐθύς), and the Gospel moves with breathless speed from miracle to controversy to Cross. Because Mark is shorter, a substantial portion of Year B is filled with John's Gospel — particularly John 6 (the Bread of Life discourse, five Sundays in summer) and the Farewell Discourse. The discipleship theme is acute: Mark shows the Twelve constantly misunderstanding Jesus, making Year B a sustained meditation on what it costs to follow the Servant-Messiah.
Year C — Luke
Year C follows the Gospel of Luke, written around AD 80-85, addressed to a largely Gentile community. Luke is the evangelist of mercy — only Luke gives us the Prodigal Son, the Good Samaritan, the repentant thief, and Zacchaeus. The poor, women, outsiders, and sinners receive special attention. Prayer and the Holy Spirit appear on nearly every page. Year C's Ordinary Time moves through Luke's "Journey Narrative" (chapters 9–19), Jesus's long, deliberate walk toward Jerusalem. For anyone who wishes to understand the Church's commitment to the poor and the universality of salvation, Year C is the key year.
The Weekday Lectionary (Years I & II)
Separate from the Sunday A/B/C cycle, weekday Masses follow a two-year cycle of readings (Year I for odd calendar years, Year II for even years). The weekday cycle covers much of the New Testament epistles and the historical and prophetic books of the Old Testament not heard on Sundays. It is covered separately and not detailed on this page.
Sundays by Cycle
Each cycle listed season-by-season. Rows with a icon have a full commentary you can read and share.
| Sunday | Gospel | Theme | |
|---|---|---|---|
| 1st Sunday of Advent | Matt 24:37-44 | Stay awake — the Son of Man comes like a thief in the night | |
| 2nd Sunday of Advent | Matt 3:1-12 | John the Baptist: "Prepare the way of the Lord; produce good fruit" | |
| 3rd Sunday of Advent (Gaudete) | Matt 11:2-11 | "Are you the one who is to come?" — the blind see, the lame walk | |
| 4th Sunday of Advent | Matt 1:18-24 | Joseph's dream: "Emmanuel — God is with us" |
| Sunday | Gospel | Theme | |
|---|---|---|---|
| Holy Family of Jesus, Mary and Joseph | Matt 2:13-15, 19-23 | Flight into Egypt — the Holy Family trusts God through exile and return | |
| Epiphany of the Lord(every year) | Matt 2:1-12 | The Magi follow the star; nations stream to the light of Christ | |
| Baptism of the Lord | Matt 3:13-17 | "This is my beloved Son" — Jesus revealed at the Jordan |
| Sunday | Gospel | Theme | |
|---|---|---|---|
| 1st Sunday of Lent | Matt 4:1-11 | Jesus tempted in the desert — where Adam fell, Christ stands firm | |
| 2nd Sunday of Lent | Matt 17:1-9 | The Transfiguration — Jesus' face shines like the sun on the holy mountain | |
| 3rd Sunday of Lent | John 4:5-42 | The Samaritan woman at the well — "The water I give becomes an eternal spring" | |
| 4th Sunday of Lent (Laetare) | John 9:1-41 | The man born blind: "I was blind, now I see" — light vs. wilful darkness | |
| 5th Sunday of Lent | John 11:1-45 | The raising of Lazarus — "I am the resurrection and the life" |
| Sunday | Gospel | Theme | |
|---|---|---|---|
| Palm Sunday of the Lord's Passion | Matt 26:14–27:66 | The Passion according to Matthew — the King enters Jerusalem and gives his life |
Sources & Further Reading
- Ordo Lectionum Missae (1969, revised 1981)
The official Roman Rite Lectionary promulgated by Pope Paul VI following the Second Vatican Council. The 1981 editio typica altera is the current authoritative edition. It introduced the three-year Sunday cycle (A/B/C) and two-year weekday cycle (I/II).
- Sacrosanctum Concilium §51 (Vatican II, 1963)
"The treasures of the Bible are to be opened up more lavishly, so that richer fare may be provided for the faithful at the table of God's word." This was the mandate that produced the 3-year lectionary.
- General Introduction to the Lectionary for Mass (GILM)
The authoritative document explaining the principles behind the lectionary's organisation, the selection of readings, and the purpose of each liturgical season.
- Catechism of the Catholic Church §§ 1145–1162 (Liturgical Signs)
CCC on the liturgical year and sacramental signs, explaining how the Church's calendar shapes Christian life over time.
- United States Conference of Catholic Bishops (USCCB) Lectionary
The official US edition of the Lectionary for Mass, including the approved calendar of cycles and feast days.
- Universalis — Catholic Daily Readings
Daily and Sunday readings calendar used to cross-check cycle assignments and readings.
- Catholic Resources: Lectionary Overview (Felix Just, SJ)
Comprehensive scholarly overview of the Roman Lectionary's structure, history, and cycle organisation.
Current Cycle
Year A — Matthew
Advent 2025 – Christ the King 2026
Quick Reference
Sunday Gospel Commentary
Individual commentaries with full context, key themes, ecumenical perspectives, and practical reflection are published weekly under the Sunday Gospel tab — designed as a sermon resource for priests and a reflection aid for the laity.
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