Mese mariano (Mary's Month) is an opera in one act by Umberto Giordano. Its Italian libretto by Salvatore Di Giacomo was adapted from his play 'O Mese Mariano, which was in turn adapted from his novella, Senza vederlo (Without Seeing Him). It premiered at the Teatro Massimo in Palermo on 17 March 1910. The opera is described as a bozzetto lirico (lyric sketch) and has a running time of 35 minutes. It tells the story of a woman who visits an orphanage to see her child. Racked with guilt at having abandoned him, she is unaware that he had died the night before.