Bloody Sunday

Bloody Sunday can refer to several events:

 Bloody Sunday (1887), a protest against the British government in London by Irish nationalists and social democrats
 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 Londonderry/Derry, Northern Ireland