The National Negro Committee, forerunner to the National Association for the Advancement of Colored People (NAACP), convenes for the first time. Date: May 31, 1909 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1909 📅 On This Day (Today)
The South Africa Act comes into force, establishing the Union of South Africa. Date: May 31, 1910 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1910 📅 On This Day (Today)
The President of Mexico Porfirio DÃaz flees the country during the Mexican Revolution. Date: May 31, 1911 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1911 📅 On This Day (Today)
The RMS Titanic is launched in Belfast, Northern Ireland. Date: May 31, 1911 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1911 📅 On This Day (Today)
World War I: Battle of Jutland: The British Grand Fleet engages the High Seas Fleet in the largest naval battle of the war, which proves indecisive. Date: May 31, 1916 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1916 📅 On This Day (Today)
The Tulsa race massacre kills at least 39, but other estimates of black fatalities vary from 55 to about 300. Date: May 31, 1921 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1921 📅 On This Day (Today)
Hope Development School fire kills 24 people, mostly disabled children. Date: May 31, 1924 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1924 📅 On This Day (Today)
A 7.7 Mw  earthquake destroys Quetta in modern-day Pakistan killing 40,000. Date: May 31, 1935 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1935 📅 On This Day (Today)
Anglo-Iraqi War: The United Kingdom completes the re-occupation of Iraq and returns 'Abd al-Ilah to power as regent for Faisal II. Date: May 31, 1941 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1941 📅 On This Day (Today)
World War II: Imperial Japanese Navy midget submarines begin a series of attacks on Sydney, Australia. Date: May 31, 1942 Read more on Wikipedia → 📅 Other events on May 31 📅 Events on this day in 1942 📅 On This Day (Today)