Second Boer War: During the Battle of the Tugela Heights, the first British attempt to take Hart's Hill fails. Date: February 23, 1900 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in 1900 📅 On This Day (Today)

Cuba leases Guantánamo Bay to the United States "in perpetuity". Date: February 23, 1903 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in 1903 📅 On This Day (Today)

Chicago attorney Paul Harris and three other businessmen meet for lunch to form the Rotary Club, the world's first service club. Date: February 23, 1905 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in 1905 📅 On This Day (Today)

The AEA Silver Dart makes the first powered flight in Canada and the British Empire. Date: February 23, 1909 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in 1909 📅 On This Day (Today)

First demonstrations in Saint Petersburg, Russia. The beginning of the February Revolution (March 8 in the Gregorian calendar). Date: February 23, 1917 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in 1917 📅 On This Day (Today)

German theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time. Date: February 23, 1927 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in 1927 📅 On This Day (Today)

U.S. President Calvin Coolidge signs a bill by Congress establishing the Federal Radio Commission (later replaced by the Federal Communications Commission) which was to regulate the use of radio frequencies in the United States. Date: February 23, 1927 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in…

Leopold III becomes King of Belgium. Date: February 23, 1934 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in 1934 📅 On This Day (Today)

Plutonium is first produced and isolated by Dr. Glenn T. Seaborg. Date: February 23, 1941 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in 1941 📅 On This Day (Today)

World War II: Japanese submarines fire artillery shells at the coastline near Santa Barbara, California. Date: February 23, 1942 Read more on Wikipedia → 📅 Other events on February 23 📅 Events on this day in 1942 📅 On This Day (Today)