Lord our God, we praise you for the light of creation: the sun, the moon, and the stars of the night. We praise you for the light of Israel: the Law, the prophets, and the wisdom of the Scriptures. We praise you for Jesus Christ your Son: he is Emmanuel, God-with-us, the Prince of Peace, who fills us with the wonder of your love.
Lord God, let your blessing come upon us as we illumine this tree. May all who delight in this tree come to the knowledge and joy of salvation. We ask this through Christ our Lord. Amen. The Book of Blessings
The Blessing of a Christmas Manger or Nativity Scene
God of every nation and people, from the very beginning of creation you have made manifest your love: when our need for a Savior was great you sent your Son to be born of the Virgin Mary. To our live he brings joy and peace, justice, mercy and love. Lord, bless all who look upon this manger; may it remind us of the birth of Jesus and raise our thoughts to him who is God-with-us and Savior of all, and who reigns forever and ever. Amen. Catholic Household Blessings and Prayers 2007