This is the title song from the 1979 musical Tell Me on a Sunday, which was written by Andrew Lloyd Webber and Don Black. The duo chose Marti Webb, who had previously replaced Elaine Page in Evita, to front the project.
Radio Times magazine asked lyricist Don Black to choose the favorite lyric of his own compositions. He chose this song explaining, "the lyric does what it's supposed to; it's touching and heartbreaking, and right away, you know where you're at: 'Don't write a letter when you want to leave/ Don't call me at 3am from a friend's apartment/ I'd like to choose how I hear the news.' When I'm asked what I look for in a song, I say, to recognize myself in it. After Tell Me on a Sunday, people told me 'I felt that,' and that's what you want to hear."
Tell Me on a Sunday was Lloyd Webber's first project after his split with Tim Rice.