If you’re a Catholic, you’ve probably seen it: a mysterious series of letters and numbers, looking for all the world like an equation, inscribed in chalk over a doorway at your parish, or at the home of a friend. Maybe you thought you could figure it out. Maybe you were too embarrassed to ask, “What the heck is that?”
If you don’t know what the chalk is all about, don’t be ashamed. You’re certainly not alone.
Epiphany (the manifestation of Christ to the Gentiles as represented by the Magi (see Matthew 2: 1-12) the festival commemorating this on 6 January) marks the occasion of a time-honored Christian tradition of “chalking the doors.” The formula for the ritual — adapted for 2026 — is simple: take chalk of any color and write the following above the entrance of your home: 20 + C + M + B + 26.
The letters have two meanings. First, they represent the initials of the Magi — Caspar, Malchior, and Balthazar — who came to visit Jesus in His first home. They also abbreviate the Latin phrase, Christus mansionem benedicat: “May Christ bless the house.” The “+” signs represent the cross, and the “20” at the beginning and the “26” at the end mark the year. Taken together, this inscription is performed as a request for Christ to bless those homes so marked and that He stay with those who dwell therein throughout the entire year.
The chalking of the doors is a centuries-old practice throughout the world, though it appears to be somewhat less well-known in the United States and the Philippines. It is, however, an easy tradition to adopt, and a great practice whereby we dedicate our year to God from its very outset, asking His blessing on our homes and on all who live, work, or visit them there.
The timing for the chalking of the doors is done on the octave of the Epiphany. Meaning eight days of Epiphany ( traditionally Jan 6-13).
Traditionally the blessing is done by either a priest or the father of the family. This blessing can be performed simply by just writing the inscription and offering a short prayer, or more elaborately, including songs, prayers, processions, the burning of incense, and the sprinkling of holy water.
After many Epiphany Masses, satchels of blessed chalk, incense, and containers of Epiphany water (holy water blessed with special blessings for Ephiphany) are distributed.
Practicing traditions like the chalking of the doors helps us to live our Faith more concretely and serve as an outward sign of our dedication to Our Lord. Our homes are also the place where many of us will make the greatest strides in our spiritual growth, through observance of daily prayer, spiritual reading, and work offered as an oblation to God.
The chalking of the doors of a home encourages Christians to dedicate their life at home to God and to others. Seeing the symbols over our doors can help to remind us, while passing in and out on our daily routines, that our homes and all those who dwell there belong to Christ. It also serves as a reminder of welcoming the Magi gave to Jesus. We should strive to be as welcoming to all who come to our homes to visit us!
Attach link below is a prayer used for Chalking our house during the Octave of Epipany (in pdf format) if you want a copy on your mobile phone in the link here:
Epiphany Chalking of Doors Prayer
This is the prayer itself:
Epiphany Chalking Prayers
Prayer:
On entering the home,
Leader(Priest, if present, or father of the family) : Peace be to this house.
All: And to all who dwell herein.
All: From the east came the Magi to Bethlehem to adore the Lord; and opening their treasures they offered precious gifts: gold for the great King, incense for the true God, and myrrh in symbol of His burial.
All Pray: The Magnificat.
(During the Magnificat, the room is sprinkled with holy water and incensed.)
The Prayer Of Mary (Magnificat)
My soul proclaims the greatness of the Lord,
my spirit rejoices in God my Savior
for he has looked with favor on his lowly servant.
From this day all generations will call me blessed:
the Almighty has done great things for me,
and holy is his Name.
He has mercy on those who fear him
in every generation.
He has shown the strength of his arm,
he has scattered the proud in their conceit.
He has cast down the mighty from their thrones,
and has lifted up the lowly.
He has filled the hungry with good things,
and the rich he has sent away empty.
He has come to the help of his servant Israel
for he remembered his promise of mercy,
the promise he made to our fathers,
to Abraham and his children forever.
All: From the east came the Magi to Bethlehem to adore the Lord; and opening their treasures they offered precious gifts: gold for the great King, incense for the true God, and myrrh in symbol of His burial.
Leader: Our Father. . .
And lead us not into temptation
All: But deliver us from evil.
Leader: All they from Saba shall come
All: Bringing gold and frankincense.
Leader: O Lord, hear my prayer.
All: And let my cry come to You.
Leader: Let us pray. O God, who by the guidance of a star didst on this day manifest Thine only-begotten Son to the Gentiles, mercifully grant that we who know Thee by faith may also attain the vision of Thy glorious majesty. Through Christ our Lord.
All: Amen.
Leader: Be enlightened, be enlightened, O Jerusalem, for thy light is come, and the glory of the Lord is risen upon thee—Jesus Christ born of the Virgin Mary.
All: And the Gentiles shall walk in thy light and kings in the splendor of thy rising, and the glory of the Lord has risen upon thee.
Leader: Let us pray.
Bless, + O Lord God almighty, this home, that in it there may be health, purity, the strength of victory, humility, goodness and mercy, the fulfillment of Thy law, the thanksgiving to God the Father and to the Son and to the Holy Ghost. And may this blessing remain upon this home and upon all who dwell herein. Through Christ our Lord.
All: Amen.
After the prayers of the blessing are recited, each room of the home is sprinkled with Epiphany water and incensed. The initials of the Magi are inscribed upon the doors with the blessed chalk. (The initials, C, M, B, can also be interpreted as the Latin phrase “Christus mansionem benedicat” which means “Christ bless this house”.)
Example: 20 + C + M + B + 26
Another possible prayer to say during your Chalking:
May all who come to our home this year rejoice to find Christ living among us; and may we seek and serve, in everyone we meet, that same Jesus who is your incarnate Word, now and forever. Amen.
God of heaven and earth, you revealed your only-begotten One to every nation by the guidance of a star. Bless this house and all who inhabit it. Fill us with the light of Christ, that our concern for others may reflect your love. We ask this through Christ our Saviour. Amen.
Loving God, bless this household. May we be blessed with health, goodness of heart, gentleness, and abiding in your will. We ask this through Christ our Saviour. Amen.