The anniversary of the Warsaw Ghetto Uprising is observed in Poland every April 19. This date commemorates the largest single revolt by Jews during World War II, marking a significant event in Jewish history. The uprising began in 1943 as a response to the Nazi regime's mass deportations from the Warsaw Ghetto, which had been established in 1940. During the observance, people lay yellow daffodils at the Monument to the Ghetto Heroes in Warsaw, a symbol that resembles the yellow star badges worn by Jews in ghettos. The tradition was initiated by Marek Edelman, the last surviving leader of the uprising, who brought daffodils to the monument until his death in 2009. Volunteers from the POLIN Museum of the History of Polish Jews distribute paper daffodil pins as part of their social-educational campaign, with a record two million pins handed out in 2024. While not an official memorial day, the anniversary is widely observed to honor both the fighters of the uprising and the civilians who suffered during this tragic period.