"New Year's Day" is a song by Irish rock band U2. It is the third track on their 1983 album War and was released as the album's lead single in January 1983. With lyrics written about the Polish Solidarity movement, "New Year's Day" is driven by Adam Clayton's distinctive bassline and the Edge's piano and guitar playing. It was the band's first UK hit single, peaking at number 10, and was also their first international hit, reaching for number 9 in Norway, number 11 on the Dutch Top 40, number 17 in Sweden, and number 53 on the Billboard Hot 100 in the United States, becoming the band's first single to chart in the US.

War is the third studio album by Irish rock band U2. It was produced by Steve Lillywhite, and was released on 28 February 1983 on Island Records. The album is regarded as U2's first overtly political album, in part because of songs like "Sunday Bloody Sunday" and "New Year's Day", as well as the title, which stems from the band's perception of the world at the time; lead vocalist Bono stated that "war seemed to be the motif for 1982."