Free-to-use (ie public domain or copyright-free)means the words can be copied and sung to at least one tune with no concerns about copyright or performance licensing. Many such hymns are old/traditional - but where possible a variety of styles / genres are included.
Seasonal noteMost communities have a familiar repertoire of public domain Christmas music, so finding free-to-use hymns for time is simple. The list below doe not include all well known Christmas carols, just ones that are a particularly good fit with the lectionary themes for this feast.
Psalm: Psalm 127 - O blessed are those fear the Lord and walk in his ways / Your wife like a fruitful vine / Indeed thus shall be blessed
Second: Colossians - Calling the people of God to live as a loving family.
Gospel: Matthew - The Lord appeared to Joseph in a dream, and warned him to escape to Egypt. Joseph obeyed, and stayed until the Lord told him that it was safe to go back to Israel.
ThemesLove, family life, being faithful to what the Lord asks.
For the Beauty of the Earth
God is Love, His the Care
Love Came Down at Christmas
O Come all ye Faithful
Of the Father's Love Begotten
Once in Royal David's City
What Child is This
Suggestions about other free-to-use hymns that could be included are welcome: either leave a comment below