"A New Day Has Come" is the first hit single from Céline Dion's comeback album A New Day Has Come, released on March 11 2002.

The song was written by Aldo Nova and Stephan Moccio. Radio remix of "A New Day Has Come" was released as the main track.

"A New Day Has Come" music video was directed by Dave Meyers and premiered on March 25 2002. "A New Day Has Come" was very successful, reaching #1 for one week on the United World Chart. On the U.S. Hot Adult Contemporary Tracks, the song broke the record for most weeks at #1: it stayed on top twenty-one weeks. The previous record holders were Phil Collins' "You'll Be in My Heart" and Céline Dion's own "Because You Loved Me," both of which lasted nineteen weeks at #1. However, as of today, the record has been surpassed, as "Drift Away" by Uncle Kracker featuring Dobie Gray remained twenty-eight weeks at #1 in 2004. Ironically, it was Céline Dion who almost took the crown from "Drift Away," but "Have You Ever Been in Love" stopped at #2 for an amazing fourteen weeks, which is another record. In the U.S. "A New Day Has Come" was not commercially released. The single appeared on the Billboard Hot 100 for airplay only, which is why it reached #22 (also #22 on the Billboard Hot 100 Airplay). However, a top 25 hit is a reasonable achievement for an airplay only single. The song remained in the singles chart for twenty weeks (which is the limit unless the track is in the top 50).

The DVD single was released four months later, peaking at #16 on the Hot 100 Singles Sales. It also charted on the Top Music Video (#11) and was certified gold (42,000 copies sold). "A New Day Has Come" CD single was certified gold in Australia (35,000), Greece (30,000) and Norway (10,000) as well. In the United Kingdom it sold 110,000 copies.

Dion performed this song five nights a week during her show A New Day... at Caesars Palace, Las Vegas.