God Rest You Merry, Gentlemen is an English traditional Christmas carol. It is in the Roxburghe Collection (iii. 452), and is listed as no. 394 in the Roud Folk Song Index. It is also known as Tidings of Comfort and Joy, and by variant incipits as Come All You Worthy Gentlemen; God Rest Ye Merry, Gentlemen; God Rest Ye, Merry Christians; or God Rest You Merry People All.
It is one of the oldest extant carols, dated to the 16th century or earlier. The earliest known printed edition of the carol is in a broadsheet dated to c. 1760. The traditional English melody is in the minor mode; the earliest printed edition of the melody appears to be in a parody, in the 1829 Facetiae of William Hone. It had been traditional and associated with the carol since at least the mid-18th century, when it was recorded by James Nares under the title "The old Christmas Carol".