"Summertime" is the name of an aria composed by George Gershwin for the 1935 opera Porgy and Bess. The lyrics are by DuBose and Dorothy Heyward and Ira Gershwin.[citation needed] The song soon became a popular jazz standard.Gershwin is said to have based this song on a Ukrainian lullaby, Oi Khodyt Son Kolo Vikon (A Dream Passes By The Windows), which he heard in a New York City performance by Oleksander Koshetz’s Ukrainian National Chorus.Gershwin began composing the song in December 1933, attempting to create his own spiritual in the style of the African American folk music of the period. It is sung multiple times throughout Porgy and Bess, first by Clara in Act I as a lullaby and soon after as counterpoint to the craps game scene, in Act II in a reprise by Clara, and in Act III by Bess, singing to Clara's baby.