A day is a unit of temporal measurement. It may also mean daytime, the part of the day when sunlight provides illumination.

Day, DAY or Days may also refer to:

People and fictional characters

• Day (surname), a list of people and fictional characters

• Days (surname), a list of people

• Day9, alias of Sean Plott, former professional gamer and e-sports commentator

Art

• Day (Michelangelo), a sculpture in the Medici Chapels in Florence, Italy

• Day, an 1881 painting by William-Adolphe Bouguereau

Film and television

• Days (2020 film), a Taiwanese drama

• Days (2023 film), a Canadian documentary

• "Day" (The Acolyte), an episode of The Acolyte

Literature

• Day (Wiesel novel), a 1962 novel by Elie Wiesel

• Day (Kennedy novel), a 2007 novel by A. L. Kennedy

• "Days" (poem), a short poem by Philip Larkin

• Days (manga), a manga series by Tsuyoshi Yasuda

Music

• DJ Day, American DJ, producer, and musician

Albums

• Days (Real Estate album), 2011

• Days (The Mountain Goats album), 2026

• Days, by Tim Knol, 2011

• Day, an EP by Jeong Se-woon, 2019

Songs

• "Days" (Alisa Mizuki song), 1997

• "Days" (Flow song), 2005

• "Days" (High and Mighty Color song), 2005

• "Days" (The Kinks song), 1968; covered by Kirsty MacColl, 1989

• "Days", a 1972 song by Steve Peregrin Took from the 1995 posthumous album The Missing Link To Tyrannosaurus Rex

• "Days"/"Green", by Ayumi Hamasaki, 2008

• "Day", by Katatonia from Brave Murder Day

• "Days", by David Bowie from Reality

• "Days", by the Drums from Portamento

• "Days", by Mother Mother from Grief Chapter

Geography

United States

• Day, California, an unincorporated community

• Day, Florida, a census-designated place

• Day, Minnesota, an unincorporated community

• Day, Missouri, an unincorporated community

• Day, New York, a town

• Day, Wisconsin, a town

• Day County, South Dakota

• Day Township, Michigan

• Days Canyon, a valley in Utah

• Black Mountain (Milpitas, California), also known as Mount Day

Elsewhere

• , a hamlet in the municipality of Vallorbe, Vaud canton, Switzerland

Industry

• Day (automobile), an automobile built in Detroit, Michigan, from 1911 to 1914

• John Day Company, an American publisher

• Day Software, an American/Swiss content management system vendor

Other uses

• Day language, a Mbum-Day language of southern Chad

• DAY, IATA code for Dayton International Airport, Ohio, United States

See also

• The Day (disambiguation)

• The Days (disambiguation)

• Day-Lewis, a surname

• Daye (disambiguation)

• Dayes, a surname