To-Morrow Is St. Valentine's Day


 * The song in The Tragicall Historie of Hamlet Prince of Denmarke, First Quarto (1603)
 * The song in Act 4, Scene 5 of The Tragedy of Hamlet, First Folio (1623, facsimile 1910)
 * "To-Morrow Is St. Valentine's Day" in The Ballad Literature and Popular Music of the Olden Time (1855)