I Didn't Know What Time It Was

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"I Didn't Know What Time It Was" is a popular song.

The music was written by Richard Rodgers, the lyrics by Lorenz Hart. The song was published in 1939.

The song was introduced by Richard Kollmar and Marcy Westcott in the musical Too Many Girls. It was performed by Trudy Erwin (dubbing for Lucille Ball in the 1940 film version and interpolated into the score of the 1957 film Pal Joey, where it was sung by Frank Sinatra.