"Loneliest Time of Year" is a Christmas song by English singer Mabel, released by Polydor Records on 22 November 2019.

[1] Mabel first teased "Loneliest Time of Year" on Twitter on 19 November 2019 by posting the lyrics, "Doesn't matter if I manage to get all the things on my list".

[2] She shared its accompanying cover art on social media and a short snippet of the song on TikTok the following day.

[5] Upon the single's release on 22 November 2019, Mabel wrote, "Important to remember that what can be the best time of year for some can be the loneliest time of year for someone else so be kind and take care of each other this Christmas.

[7] In his review for Idolator, Mike Wass called it a "wonderfully miserable" and "refreshingly realistic Christmas song".