"Christmas Time is in the Air Again" is a song by American singer and songwriter Mariah Carey from her second Christmas album and thirteenth studio album, Merry Christmas II You (2010). It was written and produced by Carey in collaboration with Broadway composer Marc Shaiman. Lyrically, it is about finding love during the Christmas season. The track garnered positive reviews from critics, with one describing it as an outstanding performance and the only song on the album that could compare to one of Carey's previous Christmas singles, "All I Want for Christmas Is You". It was released as a single in December 2012. An accompanying lyric video was released, and Carey has performed "Christmas Time Is in the Air Again" live on NBC's Christmas in Rockefeller Centre event and during her December 2014 Beacon Theatre residency called All I Want For Christmas Is You, A Night of Joy & Festivity.

"Christmas Time is in the Air Again" is an original composition written and produced by Carey with Broadway composer Marc Shaiman for Carey's second Christmas album/thirteenth studio album Merry Christmas II You (2010). It was recorded by Brian Garten at multiple recording studios, including Henson Studios, 20th Century Fox Scoring Stage, Guardian Angel Studios, Germano Studios, Capitol Recording Studios, while it was mixed by Phil Tan and assistant Damien Lewis at The Ninja Beat Club. An extensive list of additional and assistant engineers were enlisted in the production of the track: Brett "Snacky" Pierce, Scott Risett, Kenta Yonesaka, Alex Guapera, Charlie Paakkari, Tim Lauber, Tom Steel, Greg Dennon, Denis St. Amand. Aside from being credited as a songwriter and producer, the song was orchestrated and arranged by Shaiman, who also performed the piano.

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