Merriam-Webster - The Meaning of Christmas lyrics

Christ·mas noun, often attributive \ˈkris-məs\ : a Christian holiday that is celebrated on December 25 in honor of the birth of Jesus Christ or the period of time that comes before and after this holiday 1: a Christian feast on December 25 or among some Eastern Orthodox Christians on January 7 that commemorates the birth of Christ and is usually observed as a legal holiday 2: Christmastide —Merriam-Webster Dictionary