Patrick Gilmore, Irish-American composer and bandleader (died 1892)

Patrick Sarsfield Gilmore was an Irish-born American composer and military bandmaster who lived and worked in the United States after 1848. While serving in the Union Army during the U.S. Civil War, Gilmore wrote the lyrics to the song "When Johnny Comes Marching Home". This was published under the pseudonym Louis Lambert in September 1863.

December 25 is the 359th day of the year in the Gregorian calendar; six days remain until the end of the year.