The Roman Catholic Church, according to the General Roman Calendar, celebrates the following in Monday, 2017-12-25:
Is 52:7-10
How beautiful upon the mountains
are the feet of him who brings glad tidings,
announcing peace, bearing good news,
announcing salvation, and saying to Zion,
"Your God is King!"
Hark! Your sentinels raise a cry,
together they shout for joy,
for they see directly, before their eyes,
the LORD restoring Zion.
Break out together in song,
O ruins of Jerusalem!
For the LORD comforts his people,
he redeems Jerusalem.
The LORD has bared his holy arm
in the sight of all the nations;
all the ends of the earth will behold
the salvation of our God.
Ps 98:1, 2-3, 3-4, 5-6.
R. (3c)
All the ends of the earth have seen the saving power of God.
Sing to the LORD a new song,
for he has done wondrous deeds;
his right hand has won victory for him,
his holy arm.
R.All the ends of the earth have seen the saving power of God.
The LORD has made his salvation known:
in the sight of the nations he has revealed his justice.
He has remembered his kindness and his faithfulness
toward the house of Israel.
R.All the ends of the earth have seen the saving power of God.
All the ends of the earth have seen
the salvation by our God.
Sing joyfully to the LORD, all you lands;
break into song;sing praise.
R.All the ends of the earth have seen the saving power of God.
Sing praise to the LORD with the harp,
with the harp and melodious song.
With trumpets and the sound of the horn
sing joyfully before the King, the LORD.
R.All the ends of the earth have seen the saving power of God.
Heb 1:1-6
Brothers and sisters:
In times past, God spoke in partial and various ways
to our ancestors through the prophets;
in these last days, he has spoken to us through the Son,
whom he made heir of all things
and through whom he created the universe,
who is the refulgence of his glory,
the very imprint of his being,
and who sustains all things by his mighty word.
When he had accomplished purification from sins,
he took his seat at the right hand of the Majesty on high,
as far superior to the angels
as the name he has inherited is more excellent than theirs.
For to which of the angels did God ever say:
You are my son;this day I have begotten you?
Or again:
I will be a father to him, and he shall be a son to me?
And again, when he leads the firstborn into the world, he says:
Let all the angels of God worship him.
Jn 1:1-18
In the beginning was the Word,
and the Word was with God,
and the Word was God.
He was in the beginning with God.
All things came to be through him,
and without him nothing came to be.
What came to be through him was life,
and this life was the light of the human race;
the light shines in the darkness,
and the darkness has not overcome it.
A man named John was sent from God.
He came for testimony, to testify to the light,
so that all might believe through him.
He was not the light,
but came to testify to the light.
The true light, which enlightens everyone, was coming into the world.
He was in the world,
and the world came to be through him,
but the world did not know him.
He came to what was his own,
but his own people did not accept him.
But to those who did accept him
he gave power to become children of God,
to those who believe in his name,
who were born not by natural generation
nor by human choice nor by a man's decision
but of God.
And the Word became flesh
and made his dwelling among us,
and we saw his glory,
the glory as of the Father's only Son,
full of grace and truth.
John testified to him and cried out, saying,
"This was he of whom I said,
'The one who is coming after me ranks ahead of me
because he existed before me.'"
From his fullness we have all received,
grace in place of grace,
because while the law was given through Moses,
grace and truth came through Jesus Christ.
No one has ever seen God.
The only Son, God, who is at the Father's side,
has revealed him.
Is 9:1-6
The people who walked in darkness
have seen a great light;
upon those who dwelt in the land of gloom
a light has shone.
You have brought them abundant joy
and great rejoicing,
as they rejoice before you as at the harvest,
as people make merry when dividing spoils.
For the yoke that burdened them,
the pole on their shoulder,
and the rod of their taskmaster
you have smashed, as on the day of Midian.
For every boot that tramped in battle,
every cloak rolled in blood,
will be burned as fuel for flames.
For a child is born to us, a son is given us;
upon his shoulder dominion rests.
They name him Wonder-Counselor, God-Hero,
Father-Forever, Prince of Peace.
His dominion is vast
and forever peaceful,
from David's throne, and over his kingdom,
which he confirms and sustains
by judgment and justice,
both now and forever.
The zeal of the LORD of hosts will do this!
Ps 96: 1-2, 2-3, 11-12, 13.
R. (Lk 2:11)
Today is born our Savior, Christ the Lord.
Sing to the LORD a new song;
sing to the LORD, all you lands.
Sing to the LORD;bless his name.
R.Today is born our Savior, Christ the Lord.
Announce his salvation, day after day.
Tell his glory among the nations;
among all peoples, his wondrous deeds.
R.Today is born our Savior, Christ the Lord.
Let the heavens be glad and the earth rejoice;
let the sea and what fills it resound;
let the plains be joyful and all that is in them!
Then shall all the trees of the forest exult.
R.Today is born our Savior, Christ the Lord.
They shall exult before the LORD, for he comes;
for he comes to rule the earth.
He shall rule the world with justice
and the peoples with his constancy.
R.Today is born our Savior, Christ the Lord.
Ti 2:11-14
Beloved:
The grace of God has appeared, saving all
and training us to reject godless ways and worldly desires
and to live temperately, justly, and devoutly in this age,
as we await the blessed hope,
the appearance of the glory of our great God
and savior Jesus Christ,
who gave himself for us to deliver us from all lawlessness
and to cleanse for himself a people as his own,
eager to do what is good.
Lk 2:1-14
In those days a decree went out from Caesar Augustus
that the whole world should be enrolled.
This was the first enrollment,
when Quirinius was governor of Syria.
So all went to be enrolled, each to his own town.
And Joseph too went up from Galilee from the town of Nazareth
to Judea, to the city of David that is called Bethlehem,
because he was of the house and family of David,
to be enrolled with Mary, his betrothed, who was with child.
While they were there,
the time came for her to have her child,
and she gave birth to her firstborn son.
She wrapped him in swaddling clothes and laid him in a manger,
because there was no room for them in the inn.
Now there were shepherds in that region living in the fields
and keeping the night watch over their flock.
The angel of the Lord appeared to them
and the glory of the Lord shone around them,
and they were struck with great fear.
The angel said to them,
"Do not be afraid;
for behold, I proclaim to you good news of great joy
that will be for all the people.
For today in the city of David
a savior has been born for you who is Christ and Lord.
And this will be a sign for you:
you will find an infant wrapped in swaddling clothes
and lying in a manger."
And suddenly there was a multitude of the heavenly host with the angel,
praising God and saying:
"Glory to God in the highest
and on earth peace to those on whom his favor rests."
Is 62:11-12
See, the LORD proclaims
to the ends of the earth:
say to daughter Zion,
your savior comes!
Here is his reward with him,
his recompense before him.
They shall be called the holy people,
the redeemed of the LORD,
and you shall be called "Frequented,"
a city that is not forsaken.
Ps 97:1, 6, 11-12.
R.A light will shine on us this day: the Lord is born for us.
The LORD is king;let the earth rejoice;
let the many isles be glad.
The heavens proclaim his justice,
and all peoples see his glory.
R.A light will shine on us this day: the Lord is born for us.
Light dawns for the just;
and gladness, for the upright of heart.
Be glad in the LORD, you just,
and give thanks to his holy name.
R.A light will shine on us this day: the Lord is born for us.
Ti 3:4-7
Beloved:
When the kindness and generous love
of God our savior appeared,
not because of any righteous deeds we had done
but because of his mercy,
He saved us through the bath of rebirth
and renewal by the Holy Spirit,
whom he richly poured out on us
through Jesus Christ our savior,
so that we might be justified by his grace
and become heirs in hope of eternal life.
Lk 2:15-20
When the angels went away from them to heaven,
the shepherds said to one another,
"Let us go, then, to Bethlehem
to see this thing that has taken place,
which the Lord has made known to us."
So they went in haste and found Mary and Joseph,
and the infant lying in the manger.
When they saw this,
they made known the message
that had been told them about this child.
All who heard it were amazed
by what had been told them by the shepherds.
And Mary kept all these things,
reflecting on them in her heart.
Then the shepherds returned,
glorifying and praising God
for all they had heard and seen,
just as it had been told to them.