Monday, December 21, 2026
Saint Peter Canisius, Priest and Doctor of the Church
Optional memorial
December 21
The Church remembers Saint Peter Canisius, Priest and Doctor of the Church (d. 1597). Today is an optional memorial.
Readings of the day
Joyful Mysteries
Fourth Mystery: The Presentation
In Advent, the Joyful Mysteries are a natural companion any day.

““Now you are releasing your servant, Master, according to your word, in peace;”Luke 2:29
In obedience to the Law, Mary and Joseph present the Child Jesus in the Temple. The righteous Simeon takes Him in his arms and blesses God, and the prophetess Anna speaks of Him to all awaiting redemption.
Fruit of the mystery: Obedience
“O Dayspring” — the O Antiphon for December 21
O Dayspring, splendor of eternal light and sun of justice: come, and enlighten those who sit in darkness and the shadow of death.
Roman Breviary, Magnificat antiphon (translated for this app)
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This day’s five mysteries (Joyful Mysteries)
- The Annunciation
- The Visitation
- The Nativity
- The Presentation
- The Finding in the Temple
Coming up
- The Nativity of the Lord (Christmas)Fri, Dec 25 · Solemnity
- Saint Stephen, the First MartyrSat, Dec 26 · Feast
- The Holy Family of Jesus, Mary and JosephSun, Dec 27 · Feast
- The Holy Innocents, MartyrsMon, Dec 28 · Feast
- Solemnity of Mary, the Holy Mother of GodFri, Jan 1 · Solemnity
Liturgical calendar for the dioceses of the USA (General Roman Calendar and U.S. proper), checked against the USCCB liturgical calendar. Readings: citations from the U.S. Lectionary for Mass, text from the Douay-Rheims Bible (public domain).
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