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These are the selected anniversaries for September that appear on the United States portal.

1. The "edit" links edit the portal subpages that are displayed as sections here.
2. The layout design for these subpages is at Portal:United States/Anniversaries/Layout.

See also

• Yearly "...in the United States" articles, such as 2024 in the United States.
• United States history categories (Select [+] to view subcategories)

September 1

Portal:United States/Anniversaries/September/September 1

• 1772 – The Mission San Luis Obispo de Tolosa is founded in San Luis Obispo, California.
• 1774 – Massachusetts Bay colonists rise up in the bloodless Powder Alarm.
• 1836 – Narcissa Whitman, one of the first English-speaking white women to settle west of the Rocky Mountains, arrives at Walla Walla, Washington.
• 1897 – The Tremont Street Subway in Boston opens, becoming the first underground rapid transit system in North America.
• 1934 – The first Metro-Goldwyn-Mayer animated cartoon, The Discontented Canary, is released to movie theatres.
• 1983 – Cold War: Korean Air Lines Flight 007 is shot down by a Soviet Union jet fighter when the commercial aircraft enters Soviet airspace, killing all 269 on board, including Congressman Lawrence McDonald.

Edit September 1 anniversaries • September 1 anniversaries on English Wikipedia

September 2

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• 1789 – The United States Department of the Treasury is founded.
• 1885 – White miners in Rock Springs, Wyoming, attacked Chinese-American immigrants, killing at least 28 Chinese miners and causing approximately $150,000 in property damage.
• 1901 – Vice President of the United States Theodore Roosevelt utters the famous phrase, "Speak softly and carry a big stick" at the Minnesota State Fair.
• 1958 – A USAF RC-130 is shot down by fighters over Armenia when it strays into Soviet airspace while conducting a sigint mission. All crew members are killed.
• 1963 – CBS Evening News becomes U.S. network television's first half-hour weeknight news broadcast, when the show is lengthened from 15 to 30 minutes.
• 2013 – The Eastern span replacement of the San Francisco–Oakland Bay Bridge opens at 10:15 PM at a cost of $6.4 billion, after the 1989 Loma Prieta earthquake damaged the old span.

Edit September 2 anniversaries • September 2 anniversaries on English Wikipedia

September 3

Portal:United States/Anniversaries/September/September 3

• 1777 – American Revolutionary War: During the Battle of Cooch's Bridge, the Flag of the United States is flown in battle for the first time.
• 1812 – Twenty-four settlers are killed in the Pigeon Roost Massacre in Indiana.
• 1855 – American Indian Wars: In Nebraska, 700 soldiers under United States General William S. Harney avenge the Grattan massacre by attacking a Sioux village and killing 100 men, women and children.
• 1925 – USS Shenandoah, the United States' first American-built rigid airship, was destroyed in a squall line over Noble County, Ohio. Fourteen of her 42-man crew perished, including her commander, Zachary Lansdowne.
• 1976 – Viking program: The American Viking 2 spacecraft lands at Utopia Planitia on Mars.
• 2016 – The U.S. and China, together responsible for 40% of the world's carbon emissions, both formally ratify the Paris global climate agreement.

Edit September 3 anniversaries • September 3 anniversaries on English Wikipedia

September 4

Portal:United States/Anniversaries/September/September 4

• 1781 – Los Angeles is founded as El Pueblo de Nuestra Señora La Reina de los Ángeles (The Village of Our Lady, the Queen of the Angels) by 44 Spanish settlers. (skyline pictured)
• 1862 – American Civil War Maryland Campaign: General Robert E. Lee takes the Army of Northern Virginia, and the war, into the North.
• 1882 – The Pearl Street Station in New York City becomes the first power plant to supply electricity to paying customers.
• 1923 – Maiden flight of the first U.S. airship, the USS Shenandoah.
• 1957 – American Civil Rights Movement: Little Rock Crisis: The governor of Arkansas calls out the National Guard to prevent African American students from enrolling in Little Rock Central High School, resulting in the lawsuit Cooper v. Aaron the following year.
• 1998 – Google is founded by Larry Page and Sergey Brin, two students at Stanford University.

Edit September 4 anniversaries • September 4 anniversaries on English Wikipedia

September 5

Portal:United States/Anniversaries/September/September 5

• 1774 – First Continental Congress assembles in Philadelphia.
• 1781 – Battle of the Chesapeake in the American Revolutionary War: The British Navy is repelled by the French Navy, contributing to the British surrender at Yorktown.
• 1836 – Sam Houston is elected as the first president of the Republic of Texas.
• 1877 – Oglala Lakota war leader Crazy Horse was fatally wounded after surrendering while allegedly resisting imprisonment at Camp Robinson in present-day Nebraska, U.S.
• 1882 – The first United States Labor Day parade is held in New York City.
• 1977 – Voyager Program: NASA launches the Voyager 1 spacecraft.

Edit September 5 anniversaries • September 5 anniversaries on English Wikipedia

September 6

Portal:United States/Anniversaries/September/September 6

• 1620 – The Pilgrims sail from Plymouth, England on the Mayflower to settle in North America. (Old Style date; September 16 per New Style date.)
• 1628 – Puritans settle Salem, which became part of Massachusetts Bay Colony.
• 1781 – American Revolutionary War: The Battle of Groton Heights takes place, resulting in a British victory.
• 1870 – Louisa Ann Swain of Laramie, Wyoming becomes the first woman in the United States to cast a vote legally after 1807.
• 1901 – Leon Czolgosz, an unemployed anarchist, shoots and fatally wounds US President William McKinley (illustration pictured) at the Pan-American Exposition in Buffalo, New York.
• 1962 – The United States government begins the Exercise Spade Fork nuclear readiness drill.

Edit September 6 anniversaries • September 6 anniversaries on English Wikipedia

September 7

Portal:United States/Anniversaries/September/September 7

• 1630 – The city of Boston, Massachusetts is founded.
• 1776 – According to American colonial reports, Ezra Lee makes the world's first submarine attack in the Turtle, attempting to attach a time bomb to the hull of HMS Eagle in New York Harbor (no British records of this attack exist).
• 1863 – American Civil War: Union troops under Quincy A. Gillmore capture Fort Wagner in Morris Island after a 7-week siege.
• 1876 – In Northfield, Minnesota, Jesse James and the James–Younger Gang attempt to rob the town's bank but are driven off by armed citizens.
• 1916 – US federal employees win the right to Workers' compensation by Federal Employers Liability Act (39 Stat. 742; 5 U.S.C. 751)
• 2008 – The United States government takes control of the two largest mortgage financing companies in the US, Fannie Mae and Freddie Mac.

Edit September 7 anniversaries • September 7 anniversaries on English Wikipedia

September 8

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• 1664 – Two days after having been ceded to England, New Amsterdam was renamed "New York" in honor of the Duke of York, in whose name it had been captured.
• 1900 – The Great Galveston hurricane (damage pictured), the deadliest disaster in U.S. history, struck Galveston, Texas, with estimated winds of 135 miles per hour (215 km/h) at landfall, killing at least 6,000 people.
• 1951 – Treaty of San Francisco: In San Francisco, 48 nations sign a peace treaty with Japan in formal recognition of the end of the Pacific War.
• 1966 – The science fiction show Star Trek made its American premiere with "The Man Trap", launching a media franchise that has since created a cult phenomenon and has influenced the design of many current technologies.
• 1994 – USAir Flight 427 crashed on approach to Pittsburgh International Airport, resulting in 132 deaths and the longest accident investigation in the history of the National Transportation Safety Board.

Edit September 8 anniversaries • September 8 anniversaries on English Wikipedia

September 9

Portal:United States/Anniversaries/September/September 9

• 1776 – The Continental Congress officially names its union of states the United States.
• 1791 – Washington, D.C., the capital of the United States, is named after President George Washington.
• 1850 – California is admitted as the thirty-first U.S. state. (state flag pictured)
• 1850 – The Compromise of 1850 transfers a third of Texas's claimed territory (now parts of Colorado, Kansas, New Mexico, Oklahoma, and Wyoming) to federal control in return for the U.S. federal government assuming $10 million of Texas's pre-annexation debt.
• 1956 – Elvis Presley appears on The Ed Sullivan Show for the first time.
• 1972 – In Kentucky's Mammoth Cave National Park, a Cave Research Foundation exploration and mapping team discovers a link between the Mammoth and Flint Ridge cave systems, making it the longest known cave passageway in the world.

Edit September 9 anniversaries • September 9 anniversaries on English Wikipedia

September 10

Portal:United States/Anniversaries/September/September 10

• 1607 – Edward Maria Wingfield ousted as first president of the governing council of the Colony of Virginia; he is replaced by John Ratcliffe.
• 1608 – John Smith is elected council president of Jamestown, Virginia.
• 1813 – The United States defeats a British Fleet at the Battle of Lake Erie during the War of 1812.
• 1846 – Elias Howe is granted a patent for the sewing machine.
• 1932 – The New York City Subway's third competing subway system, the municipally-owned IND, is opened.
• 2017 – Hurricane Irma makes landfall on Cudjoe Key, Florida as a Category 4, after causing catastrophic damage throughout the Caribbean. Irma resulted in 134 deaths and $64.76 billion (2017 USD) in damage.

Edit September 10 anniversaries • September 10 anniversaries on English Wikipedia

September 11

Portal:United States/Anniversaries/September/September 11

• 1777 – American Revolution: Battle of Brandywine – The British celebrate a major victory in Chester County, Pennsylvania.
• 1789 – Alexander Hamilton is appointed the first United States Secretary of the Treasury.
• 1813 – War of 1812: British troops arrive in Mount Vernon and prepare to march to and invade Washington, D.C.
• 1830 – Anti-Masonic Party convention; one of the first American political party conventions.
• 1941 – Ground is broken for the construction of The Pentagon.
• 2001 – Two hijacked aircraft crash into the World Trade Center in New York City, while a third smashes into The Pentagon in Arlington, Virginia, and a fourth into a field near Shanksville, Pennsylvania, in a series of coordinated suicide attacks by 19 members of Al-Qaeda. Altogether, 2,996 people are killed.

Edit September 11 anniversaries • September 11 anniversaries on English Wikipedia

September 12

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• 1609 – Henry Hudson begins his exploration of the Hudson River while aboard the Halve Maen.
• 1857 – The SS Central America sinks about 160 miles east of Cape Hatteras, North Carolina, drowning a total of 426 passengers and crew, including Captain William Lewis Herndon. The ship was carrying 13–15 tons of gold from the California Gold Rush.
• 1940 – The Hercules Powder Plant Disaster in the United States kills 51 people and injures over 200.
• 1962 – President John F. Kennedy delivers his "We choose to go to the Moon" speech at Rice University.
• 1983 – A Wells Fargo depot in West Hartford, Connecticut, United States, is robbed of approximately US$7 million by Los Macheteros.
• 1992 – NASA launches Space Shuttle Endeavour on STS-47 which marked the 50th shuttle mission. On board are Mae Carol Jemison, the first African-American woman in space, Mamoru Mohri, the first Japanese citizen to fly in a US spaceship, and Mark Lee and Jan Davis, the first married couple in space.

Edit September 12 anniversaries • September 12 anniversaries on English Wikipedia

September 13

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• 1814 – War of 1812: Fort McHenry in Baltimore's Inner Harbor was attacked by British forces during the Battle of Baltimore, inspiring Francis Scott Key to write "Defence of Fort McHenry", later used as the lyrics to the United States national anthem.
• 1847 – Mexican–American War: Six teenagers known as Los Niños Héroes fought to their death defending the military academy at Castillo de Chapultepec in Mexico City during the Battle of Chapultepec.
• 1848 – An explosion drove an iron rod through the head of railroad foreman Phineas Gage, making him an important early case of personality change after brain injury.
• 1956 – IBM unveiled the 305 RAMAC (Random Access Method of Accounting and Control), the first commercial computer that used magnetic disk storage.
• 1971 – The Attica Prison riot ended when New York Governor Nelson Rockefeller ordered the storming of the prison, in which 38 people died by gunfire.
• 1993 – After rounds of secret negotiations in Norway, PLO leader Yasser Arafat and Israeli Prime Minister Yitzhak Rabin formally signed the Oslo Peace Accords. (pictured)

Edit September 13 anniversaries • September 13 anniversaries on English Wikipedia

September 14

Portal:United States/Anniversaries/September/September 14

• 1763 – Seneca warriors defeat British forces at the Battle of Devil's Hole during Pontiac's War.
• 1814 – Battle of Baltimore: The poem Defence of Fort McHenry is written by Francis Scott Key. The poem is later used as the lyrics of The Star-Spangled Banner.
• 1901 – Theodore Roosevelt became President of the United States at age 42, the youngest person ever to do so, (1904 pictured) eight days after William McKinley was fatally wounded in Buffalo, New York.
• 1975 – The first American saint, Elizabeth Ann Seton, is canonized by Pope Paul VI.
• 1994 – The Major League Baseball season is canceled because of a strike.
• 1998 – Telecommunications companies MCI Communications and WorldCom complete their $37 billion merger to form MCI WorldCom.

Edit September 14 anniversaries • September 14 anniversaries on English Wikipedia

September 15

Portal:United States/Anniversaries/September/September 15

• 1857 – William Howard Taft, 27th President of the United States and 10th Chief Justice of the United States, the only man to hold both postings, was born. During his lifetime Taft would also serve as the 1st Civil Governor of the Philippines and the 1st Provisional Governor of Cuba.
• 1944 – The Battle of Peleliu begins as the United States Marine Corps' 1st Marine Division and the United States Army's 81st Infantry Division hit White and Orange beaches under heavy fire from Japanese infantry and artillery.
• 1950 – United States forces perform an amphibious landing off the coast of Inchon, Korea. The Battle of Inchon would prove to be a turning point in the Korean War.
• 1959 – Nikita Khrushchev becomes the first Soviet leader to visit the United States.
• 1966 – President Lyndon B. Johnson, responding to a sniper attack at the University of Texas at Austin, writes a letter to Congress urging the enactment of gun control legislation.
• 1981 – The Senate Judiciary Committee unanimously approves Sandra Day O'Connor (pictured) to become the first female justice of the Supreme Court of the United States

Edit September 15 anniversaries • September 15 anniversaries on English Wikipedia

September 16

Portal:United States/Anniversaries/September/September 16

• 1776 – American Revolutionary War: American colonists defeated British troops at the Battle of Harlem Heights on the island of Manhattan.
• 1863 – Robert College, the first American educational institution outside the United States, was founded in Istanbul.
• 1920 – A bomb in a horse-drawn wagon exploded (aftermath pictured) in front of 23 Wall Street in New York City, killing 38 people and injuring several hundred others.
• 1961 – The U.S. National Hurricane Research Project sought to weaken Hurricane Esther by seeding it with silver iodide, leading to the establishment of Project Stormfury.
• 2004 – Hurricane Ivan makes landfall in Gulf Shores, Alabama as a Category 3 hurricane.
• 2013 – A lone gunman fatally shot twelve people and injured three others at the headquarters of the Naval Sea Systems Command in Washington, D.C.

Edit September 16 anniversaries • September 16 anniversaries on English Wikipedia

September 17

Portal:United States/Anniversaries/September/September 17

• 1775 – American Revolutionary War: The Continental Army under Richard Montgomery began the Siege of Fort St. Jean in the British province of Quebec.
• 1787 – The text of the United States Constitution was finalized at the Philadelphia Convention.
• 1849 – Harriet Tubman (pictured) escaped from slavery in the U.S. state of Maryland, and later orchestrated the rescues of other slaves via the Underground Railroad.
• 1862 – American Civil War: Almost 23,000 total casualties were suffered at the Battle of Antietam near Sharpsburg, Maryland, where Confederate and Union troops fought to a tactical stalemate.
• 1962 – NASA announced the Next Nine astronauts selected for the purpose of landing on the moon.
• 2011 – Occupy Wall Street movement begins in Zuccotti Park, New York City.

Edit September 17 anniversaries • September 17 anniversaries on English Wikipedia

September 18

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September 19

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September 20

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• 1814 – Francis Scott Key's poem Defence of Fort McHenry (pictured), which would later become known as "The Star Spangled Banner", was published for the first time, in the broadsheet publication Patriot.
• 1848 – The American Association for the Advancement of Science is created.
• 1881 – Chester A. Arthur is inaugurated as the 21st President of the United States following the assassination of James Garfield.
• 1891 – The first gasoline-powered car debuts in Springfield, Massachusetts.
• 1973 – Billie Jean King beats Bobby Riggs in The Battle of the Sexes tennis match at the Houston Astrodome in Houston, Texas.
• 2001 – In an address to a joint session of Congress and the American people, U.S. President George W. Bush declares a "war on terror".

Edit September 20 anniversaries • September 20 anniversaries on English Wikipedia

September 21

Portal:United States/Anniversaries/September/September 21

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September 22

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September 23

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September 24

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September 25

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September 26

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September 27

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September 28

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September 29

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September 30

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