Frank Loesser wrote “What Are You Doing New Year's Eve?”, first published in 1947.
Loesser was an American songwriter and lyricist known for Broadway and popular music. The song asks a romantic question about a future New Year's Eve, rather than describing the celebration itself, which gives it a distinctive anticipatory mood.
The composition was recorded by several performers soon after its publication and became a recurring seasonal standard. Its title is sometimes treated as a conventional holiday greeting, but the lyric is actually framed as a personal invitation and speculation about a date.
The song is also sometimes confused with “Auld Lang Syne” or other songs traditionally heard at midnight. Those works have different authors and historical roots; Loesser's song is a 20th-century popular standard written specifically around the New Year's Eve question.