"The Christmas Song," subtitled "Chestnuts Roasting on an Open Fire," is a holiday standard composed by Mel Torme and lyricist Robert Wells in July 1945. The song was famously written during a sweltering Los Angeles heat wave, when Wells jotted down wintry images to cool off mentally and Torme arrived to set them to music, completing the song in roughly forty-five minutes. The composition is a warm, nostalgic ballad with a flowing melody that evokes cozy winter scenes through its lyrical imagery. It follows a 32-bar AABA form, though its structure is distinctive in that it lacks a traditional chorus, instead unfolding as a series of verses with a contrasting bridge, giving it a narrative, storytelling quality. The harmony features lush, straightforward chord progressions characteristic of mid-century American popular song, supporting the gentle, intimate character of the melody. Nat King Cole's 1946 recording for Capitol Records established the song as a perennial favorite, and it has since become one of the most frequently performed and recorded Christmas songs in existence. BMI has ranked it among the most-played holiday compositions of all time. The song earned induction into the Songwriters Hall of Fame and was added to the Library of Congress National Recording Registry. Torme himself performed it throughout his career, including a notable duet with Judy Garland on her 1963 Christmas television special, for which he wrote an additional opening verse.