Browse Historical Events by Day: What Happened on September 30th?

Henry Bolingbroke lands in England and begins his successful campaign to overthrow King Richard II, eventually becoming King Henry IV of England.

The Council of Pisa opens, marking the beginning of the Western Schism in the Catholic Church, with multiple claimants to the papacy.

Suleiman the Magnificent succeeds his father, Selim I, as Ottoman Sultan, the tenth and longest-reigning sultan of the Ottoman Empire. His realm extended from Hungary to Iran, and from Crimea to North Africa and the Indian Ocean. As he engaged in bitter rivalries with the Catholic Habsburgs and the Shiite Safavids, he presided over a multilingual and multireligious empire that promised peace and prosperity to its subjects. He died on the night of September 6/7, 1566, of natural causes. More

Joseph Marion Hernández becomes the first Hispanic American to be elected to the United States Congress. He represented the newly created Florida Territory. Hernandez was born a Spanish citizen in St. Augustine, FL. As of 2022, There are 52 Hispanic or Latino Members serving: 46 in the House, including 2 Delegates and the Resident Commissioner, and 7 in the Senate. More

The Wyoming legislators write the first state constitution granting women the right to vote. It was signed into law on December 10, 1869, by Territorial Governor John Allen Campbell. On September 6, 1870, Louisa Ann Swain of Laramie, Wyoming became the first woman to cast a vote in a general election. In 1890, when the U.S. Congress demanded Wyoming rescind the right of women to vote as a condition of statehood, Wyoming, with a Republican governor and Democratic legislature, insisted it would not accept statehood without keeping women's suffrage. Congress gave in, and Wyoming became 44th State and the first U.S. state in which women could vote.

The International Military Tribunal at Nuremberg delivers its verdicts, with several high-ranking Nazi officials found guilty of war crimes, crimes against humanity, and other atrocities committed during World War II. More

USS Nautilus (SSN-571), the world’s first nuclear powered submarine is commissioned at Groton, Connecticut, with Commander Eugene P. Wilkinson as the boat’s first commander. The construction of Nautilus was made possible by the successful development of a nuclear propulsion plant by a group of scientists and engineers, under the leadership of Captain Hyman G. Rickover. More

Botswana Independence day from the UK (Effective date of the Botswana Independence Act 1966).

The Indonesian province of East Timor declares its independence from Portugal, leading to an Indonesian invasion and subsequent occupation that lasted until 1999.

The Ethernet specifications are published by Xerox in collaboration with Intel and Digital Equipment Corporation. Manufacturers had been skeptical of building LAN connections into their products because the lack of industrywide standards meant the networks may not work with equipment from other companies. The Ethernet standard created a uniform network protocol companies could share. More

The "Don't Ask, Don't Tell" policy is officially repealed.

The U.S., Canada, and Mexico agree to the United States-Mexico-Canada Agreement (USMCA).

The U.S., Canada, and Mexico agree to the United States-Mexico-Canada Agreement (USMCA).