Luke
Luke 2:11ESV·traditional attribution

For unto you is born this day in the city of David a Savior, who is Christ the Lord.

John Calvin Reformed @genevareformer

11. This day is born to you Here, as we lately hinted, the angel expresses the cause of the joy. This day is born the Redeemer long ago promised, who was to restore the Church of God to its proper condition. The angel does not speak of it as a thing altogether unknown.

Matthew Henry Presbyterian @wholebiblehenry

The meanest circumstances of Christ's humiliation were all along attended with some discoveries of his glory, to balance them, and take off the offence of them; for even when he humbled himself God did in some measure exalt him and give him earnests of his future exaltation.

Commenting on Luke 2:8-20

John Gill Reformed Baptist @doctorgill

For unto you is born this day,.... Day is here put for a natural day, consisting both of night and day; for it was night when Christ was born, and the angels brought the tidings of it to the shepherds.