What day did Bruno and shmuel die?

Bruno and Shmuel died on January 27, 1945, the day Bruno entered the gas chamber at the extermination camp, believing he was helping Shmuel find his missing father. This tragic event occurs at the end of the novel "The Boy in the Striped Pajamas" by John Boyne, marking the culmination of their friendship amidst the horrors of the Holocaust.