Bloody Sunday can refer to several events:
Bloody Sunday (1887), a protest against the British government in Ireland
Bloody Sunday (1900), a day in the Second Boer War, South Africa
Bloody Sunday (1905), a massacre in Saint Petersburg that led to the Russian Revolution of 1905 Bloody Sunday (1920), a day of violence in Dublin during the Irish War of Independence Bloody Sunday (1921), a day of violence in Belfast during the Irish War of Independence Bloody Sunday (1926), a day of violence in Alsace Bloody Sunday (1938), a day of violence against protesters in Vancouver Bloody Sunday (1939), a massacre in Bydgoszcz, Poland, at the start of World War II Bloody Sunday (1965), a violent attack in Alabama, United States Bloody Sunday (1969), violence after a protest in Istanbul Bloody Sunday (1972), shooting of protesters by the British Army in Derry, Northern Ireland