"In dulci jubilo" (Latin for "In sweet rejoicing") is a traditional Christmas carol. In its original setting, the carol is a macaronic text of German and Latin dating from the Middle Ages. Subsequent translations into English, such as J. M. Neale's arrangement "Good Christian Men, Rejoice" have increased its popularity, and Robert Pearsall's 1837 macaronic translation is a mainstay of the Christmas Nine Lessons and Carols repertoire. J. S. Bach's chorale prelude based on the tune (BWV 729) is also a traditional postlude for Christmas services.