September 14 in History

Abū Jaʿfar Hārūn ibn Muḥammad ar-Rashīd, or simply Hārūn ibn al-Mahdī, famously known as Hārūn al-Rashīd, was the fifth Abbasid caliph of the Abbasid Caliphate, reigning from September 786 until his death in March 809. His reign is traditionally regarded to be the beginning of the Islamic Golden Age. His epithet al-Rashid translates to "the Just", "the Upright", or "the Rightly-Guided".

Roger of Salerno was regent of the Principality of Antioch from 1112 to 1119. He was the son of Richard of the Principate and the nephew of Tancred, Prince of Galilee, both participants on the First Crusade. He became regent of Antioch when Tancred died in 1112; the actual prince, Bohemond II, was still a child. Like Tancred, Roger was almost constantly at war with the nearby Muslim states such as Aleppo. In 1114 there was an earthquake that destroyed many of the fortifications of the principality, and Roger took great care to rebuild them, especially those near the frontier.

The Catholic Church, also called the Roman Catholic Church, is the largest Christian church, with an estimated 1.28 to 1.41 billion baptized members worldwide as of 2026. It consists of 24 autonomous churches—the Latin Church and 23 Eastern Catholic Churches—organized into nearly 3,500 dioceses and eparchies governed by bishops. Throughout history, the church has had a large role in the development of Western civilization. Catholic communities are present worldwide through missions, immigration, and conversions. The majority of Catholics live in the Global South, reflecting rapid demographic growth in Africa, Asia, and Latin America, as well as secularization in parts of Europe and North America.

The Bishop Gore School is a secondary school in Swansea in Wales, founded on 14 September 1682 by Hugh Gore (1613–1691), Bishop of Waterford and Lismore. It is situated in Sketty, close to Singleton Park and Swansea University. In December 2013 the school was ranked in the second highest of five bands by the Welsh Government, based on performance in exams, value added performance, disadvantaged pupils' performance, and attendance.

António Manoel de Vilhena was a Portuguese nobleman who was the 66th Prince and Grand Master of the Order of St. John of Jerusalem from 19 June 1722 to his death in 1736. Unlike a number of the other Grand Masters, he was benevolent and popular with the Maltese people. Vilhena is mostly remembered for the founding of Floriana, the construction of Fort Manoel and the Manoel Theatre, and the renovation of the city of Mdina.

The adoption of the Gregorian Calendar has taken place in the history of most cultures and societies around the world, marking a change from one of various traditional dating systems to the contemporary system – the Gregorian Calendar – which is widely used around the world today. Some polities adopted the new calendar in 1582, others not before the early twentieth century, and others at various dates between. A few have yet to do so, but except for these, the Gregorian Calendar is now the universal civil calendar, yet old style calendars remain in use in religious or traditional contexts. During – and for some time after – the transition between systems, it has been common to use the terms "Old Style" and "New Style" in dating to indicate which calendar was used to reckon them.

The American Revolutionary War, also known as the Revolutionary War or American War of Independence or simply the American Revolution, was the armed conflict that comprised the final eight years of the broader American Revolution, in which American Patriot forces organized as the Continental Army and commanded by George Washington defeated the British Army. The conflict was fought in North America, the Caribbean, and the Atlantic Ocean. The war's outcome seemed uncertain for most of the war, but Washington and the Continental Army's decisive victory in the Siege of Yorktown in 1781 led King George III and the Kingdom of Great Britain to negotiate an end to the war. In 1783, in the Treaty of Paris, the British monarchy acknowledged the independence of the Thirteen Colonies, leading to the establishment of the United States as an independent and sovereign nation.

The Finnish War was fought between the Kingdom of Sweden and the Russian Empire from 21 February 1808 to 17 September 1809 as part of the Napoleonic Wars. As a result of the war, the eastern third of Sweden was established as the autonomous Grand Duchy of Finland within the Russian Empire. Other notable effects were the Swedish parliament's adoption of a new constitution and the establishment of the House of Bernadotte, the new Swedish royal house, in 1818.

The Battle of Baltimore took place between British and American forces on September 12–14, 1814, during the War of 1812. Defending American forces repulsed sea and land invasions off the busy major port city of Baltimore, Maryland, by British forces preventing the United States' third largest city at the time from falling to British forces and ending the British Chesapeake campaign.

The American Civil War was a civil war in the United States between the Union and the Confederacy, which was formed in 1861 by states that had seceded from the Union to preserve slavery in the United States. The South saw slavery as threatened because of the election of Abraham Lincoln and the growing abolitionist movement in the North. The war ended with Union victory, the dissolution of the Confederacy and the abolition of slavery, freeing four million African Americans.

Pyotr Arkadyevich Stolypin was a Russian statesman who served as the third prime minister and the interior minister of the Russian Empire from 1906 until his assassination in 1911. Known as a reformer of Russian society and the economy, he initiated reforms which were halted by his assassination.

The Russian Empire was the final period of the Russian monarchy, spanning most of northern Eurasia from its establishment in 1721 until the proclamation of the Russian Republic in 1917. At its height in the late 19th century, it covered about 22,800,000 km2 (8,800,000 sq mi), roughly one-sixth of the world's landmass, making it the third-largest empire in history, behind only the British and Mongol empires. It colonized Alaska between 1799-1867. The empire's 1897 census found a population of 126 million with considerable ethnic, linguistic, religious, and socioeconomic diversity.

World War II, or the Second World War, was a global conflict between two coalitions: the Allies and the Axis powers. Nearly all of the world's countries participated. World War II was the deadliest conflict in history, causing the death of 60 to 75 million people. Millions died as a result of massacres, starvation, disease, and genocides, including the Holocaust. After the Allied victory, Germany, Austria, Japan, and Korea were occupied, and German and Japanese leaders were tried for war crimes.

The Wehrmacht were the unified armed forces of Nazi Germany from 1935 to 1945. It consisted of the Heer (army), the Kriegsmarine (navy) and the Luftwaffe. The designation "Wehrmacht" replaced the previously used term Reichswehr and was the manifestation of the Nazi regime's efforts to rearm Germany to a greater extent than the Treaty of Versailles permitted.

The Indian Army (IA) is the land-based branch and largest component of the Indian Armed Forces. The President of India is the Supreme Commander of the Indian Army, and its professional head is the Chief of the Army Staff (COAS). The Indian Army was established on 1 April 1895 alongside the long established presidency armies of the East India Company, which too were absorbed into it in 1903. Some princely states maintained their own armies which formed the Imperial Service Troops which, along with the Indian Army formed the land component of the Armed Forces of the Crown of India, responsible for the defence of the Indian Empire. The Imperial Service Troops were merged into the Indian Army after independence. The units and regiments of the Indian Army have diverse histories and have participated in several battles and campaigns around the world, earning many battle and theatre honours before and after Independence.

The Mohr Rocket was a sounding rocket developed by Ernst Mohr in Wuppertal, Germany.

The Congo Crisis was a period of political upheaval and conflict between 1960 and 1965 in the Republic of the Congo. The crisis began almost immediately after the Congo became independent from Belgium and ended, unofficially, with the entire country under the rule of Joseph-Désiré Mobutu. Constituting a series of civil wars, the Congo Crisis was also a proxy conflict in the Cold War, in which the Soviet Union and the United States supported opposing factions. Around 100,000 people are believed to have been killed during the crisis.

This article lists the heads of state of Afghanistan since the foundation of the first modern Afghan state, the Hotak Empire, in 1709.

Joseph William Kittinger II was an American military pilot who was an officer in the United States Air Force. He served from 1950 to 1978 and earned Command Pilot status before retiring with the rank of colonel. He held the world record for the highest skydive—102,800 feet (31.3 km)—from 1960 until 2012.

The Standard Gravure shooting occurred on September 14, 1989, in Louisville, Kentucky, United States, when Joseph Thomas Wesbecker, a 47-year-old pressman, killed eight people and injured twelve at his former workplace, Standard Gravure, before committing suicide. The shooting is the deadliest workplace shooting in Kentucky's history. The murders resulted in a high-profile lawsuit against Eli Lilly and Company, manufacturers of the antidepressant drug Prozac, which Wesbecker had begun taking during the month prior to his shooting rampage.

Lufthansa Flight 2904 was an Airbus A320 flying from Frankfurt, Germany to Warsaw, Poland that overran the runway at Okęcie International Airport on 14 September 1993.

The 12833 / 12834 Howrah–Ahmedabad Superfast Express is a superfast express train belonging to Indian Railways that runs between Howrah and Ahmedabad Junction in India.

Kiribati, officially the Republic of Kiribati, is an archipelagic country spanning the Micronesia and Polynesia sub-regions of Oceania in the central Pacific Ocean. The state comprises 32 atolls and other islands and one remote raised coral island, Banaba. Its total land area is 811 km2 (313 sq mi) dispersed over 3,441,810 km2 (1,328,890 sq mi) of ocean. The spread of the country's islands, from Banaba in the west to Kiritimati in the east straddles the equator and the 180th meridian. The International Date Line goes around Kiribati and swings far to the east, almost reaching 150°W. This brings Kiribati's easternmost islands, the southern Line Islands south of Hawaii, into the same day as the Gilbert Islands and places them in the most advanced time zone on Earth: UTC+14.

The Cathedral Church of Saint Peter and Saint Paul in the City and Episcopal Diocese of Washington, commonly known as Washington National Cathedral or National Cathedral, is a cathedral of the Episcopal Church. The cathedral is located in Washington, D.C., the capital of the United States. The structure is of Neo-Gothic design closely modeled on English Gothic style of the late fourteenth century. It is the second-largest church building in the United States, and the third-tallest building in Washington, D.C. The cathedral is the seat of both the presiding bishop of the Episcopal Church and the bishop of the Episcopal Diocese of Washington. Over 270,000 people visit the structure annually.

A referendum took place on 14 September 2003 to decide whether Estonia should join the European Union (EU). Just over two-thirds of voters voted Yes and Estonia joined the EU on 1 May 2004.

A major worldwide financial crisis centered in the United States took place in 2008. The causes included excessive speculation on property values by both homeowners and financial institutions, leading to the 2000s United States housing bubble. This was exacerbated by predatory lending for subprime mortgages and by deficiencies in regulation. Cash out refinancings had fueled an increase in consumption that could no longer be sustained when home prices declined. The first phase of the crisis was the subprime mortgage crisis, which began in early 2007, as mortgage-backed securities (MBS) tied to U.S. real estate, and a vast web of derivatives linked to those MBS collapsed in value. A liquidity crisis spread to global institutions by mid-2007 and climaxed with the bankruptcy of Lehman Brothers in September 2008, which triggered a stock market crash and bank runs in several countries. The crisis exacerbated the Great Recession, a global recession that began in late-2007, as well as the United States bear market of 2007–2009. It was also a contributor to the 2008–2011 Icelandic financial crisis and the euro area crisis.

The first direct observation of gravitational waves was made on 14 September 2015 and was announced by the LIGO and Virgo collaborations on 11 February 2016. Previously, gravitational waves had been inferred only indirectly, via their effect on the timing of pulsars in binary star systems. The waveform, detected by both LIGO observatories, matched the predictions of general relativity for a gravitational wave emanating from the inward spiral and merger of two black holes and the subsequent ringdown of a single, 62 M☉ black hole remnant. The signal was named GW150914. It was also the first observation of a binary black hole merger, demonstrating both the existence of binary stellar-mass black hole systems and the fact that such mergers could occur within the current age of the universe.

Queen Elizabeth II, Queen of the United Kingdom and the other Commonwealth realms, died on 8 September 2022 at Balmoral Castle in Scotland, at the age of 96. Elizabeth's reign of 70 years and 214 days is the longest of any British monarch. She was immediately succeeded by her eldest child, Charles III, who was declared king from prince of the United Kingdom.