Summertime

Summertime means a time in Summer, one of the temperate seasons, and it could also mean:  

In music:
 "Summertime" (Beyoncé song), a popular song by George Gershwin from the 1935 opera Porgy and Bess
 "Summertime" (song)
 "Summertime" (DJ Jazzy Jeff and the Fresh Prince song)
 "Summertime" (Kenny Chesney song)
 "Summertime", a song by Diana Ross from her 1987 album Red Hot Rhythm & Blues
 "Summertime", a 1998 single by SKAMP
 "Summer Time", a song by The Pretty Things from the 2000 reissue of their 1970 album Parachute
 "Summertime", a song by Bon Jovi from their 2007 album Lost Highway
 Summertime EP, an EP by The Subways
 Summertime (Joe Locke & Geoffrey Keezer Quartet album)
 Summertime (Herb Alpert & the Tijuana Brass album), a 1971 album by Herb Alpert & the Tijuana Brass

In movie, television, and theatre:
 Summertime (movie), a 1955 movie starring Katharine Hepburn
 L'Heure D'été (movie) (English: Summertime), a 2007 French movie starring Juliette Binoche
 Summertime (TV), a 1997 Irish television movie short
 Summertime (cartoon), a 1934 cartoon by Ub Iwerks, featured on an episode of Pee-wee's Playhouse
 Summertime, a play by Ugo Betti

In timekeeping:
 Summer Time, advancing the clock one hour during summer, in American English known as daylight saving time