September 2019 climate strikes
Roughly four million people, mostly students, demonstrate across the world to address climate change. Sixteen-year-old Greta Thunberg from Sweden leads the demonstration in New York City.
What happened on September 20
35 events · 20 births · 20 deaths · 8 observances. From 1498 to 2025.
Standout on September 20
2019
September 2019 climate strikes
Roughly four million people, mostly students, demonstrate across the world to address climate change. Sixteen-year-old Greta Thunberg from Sweden leads the demonstration in New York City.
About September 20
September 20 is the 263rd day of the year. These facts are computed from the calendar, not copied from anywhere.
- Day of the year
- Day 263 of 365 (264 in leap years)102 days left in the year (102 in leap years)
- Falls on
- Sunday in 2026, Monday in 2027, Wednesday in 2028, Thursday in 2029, Friday in 2030
- Week
- ISO week 38 of 2026 · Q3
- Zodiac sign
- ♍ Virgo (August 23 – September 22)
- Season
- Summer in the north · Winter in the south
- September birthstone
- Sapphirewisdom, loyalty and nobility
- September birth flower
- Aster / Morning glorypatience, wisdom and affection
- Next occurrence
- In 328 days
- Roman numerals
- XX.IXday.month — see the Roman numeral date tool
Anniversaries in 2026
- 30thIoana Loredana Roșca1996
- 25thWar on terror2001
- 10thCurtis Hanson2016
- 10thPeter Leo Gerety2016
- 1stMatt Beard2025
September 20 through the years
- 10 years ago2016
- Peter Leo Gerety · Curtis Hanson
- 25 years ago2001
- War on terror
- 50 years ago1976
- Nothing recorded
- 100 years ago1926
- Nothing recorded
- 200 years ago1826
- Nothing recorded
Born on September 20 — ages this year
- 2003Thomas Crooksturns 23
- 1998Trevon Diggsturns 28
- 1997Itamar Einhornturns 29
- 1996Ioana Loredana Roșcaturns 30
- 1995Laura Dekkerturns 31
- 1995Rob Holdingturns 31
Historical events 35
A dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
Sinking of MV Nyerere
At least 161 people die after a ferry capsizes close to the pier on Ukara Island in Lake Victoria, Tanzania.
Hurricane Maria
Hurricane Maria makes landfall in Puerto Rico as a powerful Category 4 hurricane, resulting in 2,975 deaths, US$90 billion in damage, and a major humanitarian crisis.
Don't ask, don't tell
The United States military ended its "don't ask, don't tell" policy, consequently allowing gay and lesbian people to serve openly.
Islamabad Marriott Hotel bombing
An explosive-laden truck detonated in front of the Marriott hotel in Islamabad, Pakistan, killing 54 people and injuring 266 others.
Jena Six
Between 15,000 and 20,000 protesters march on Jena, Louisiana, United States, in support of six black youths who had been convicted of assaulting a white classmate.
2003 Maldives civil unrest
Civil unrest in the Maldives breaks out after a prisoner is killed by guards.
War on terror
In an address to a joint session of Congress and the American people, U.S. President George W. Bush declares a "war on terror".
2000 MI6 attack
The United Kingdom's MI6 Secret Intelligence Service building is attacked by individuals using a Russian-built RPG-22 anti-tank missile.
Real Irish Republican Army
The Real Irish Republican Army carried out a rocket-launcher attack on the MI6 headquarters in London, with no casualties and minimal damage recorded.
1997 Atlantic hurricane season
Hurricane Erika, the strongest and longest-lasting hurricane of the 1997 Atlantic hurricane season, dissipated after causing flooding and power outages throughout Puerto Rico.
South Ossetia
South Ossetia declares its independence from Georgia.
USAir Flight 5050
USAir Flight 5050 crashes into Bowery Bay during a rejected takeoff from LaGuardia Airport, killing two people.
Margaret Thatcher
British prime minister Margaret Thatcher gave a landmark speech at the Belfry of Bruges, Belgium, against federalism in the European Economic Community.
1984 US embassy bombing in Beirut
A suicide bomber in a car attacks the U.S. embassy in Beirut, Lebanon, killing twenty-two people.
The Cosby Show
The Cosby Show, which became one of three U.S. television shows to have the highest ratings five years in a row, premiered with its pilot episode.
1982 NFL season
NFL season: American football players in the National Football League begin a 57-day strike.
Operation Caban
A French-supported coup d'état in the Central African Empire overthrows Emperor Bokassa I.
Petrozavodsk phenomenon
A series of celestial phenomena of disputed nature was observed in the western Soviet Union, Finland and Denmark.
Vietnam
Vietnam is admitted to the United Nations.
Billie Jean King
Billie Jean King defeated Bobby Riggs in straight sets at the Astrodome in Houston, Texas, in an internationally televised tennis match dubbed the "Battle of the Sexes".
Jim Croce
Singer Jim Croce, songwriter and musician Maury Muehleisen and four others die when their light aircraft crashes shortly after takeoff from Natchitoches Regional Airport in Louisiana.
Hurricane Irene–Olivia
Hurricane Irene (satellite image pictured) moved into the Pacific Ocean from the Atlantic, making it the first actively tracked tropical cyclone to do so.
L. Ron Hubbard
L. Ron Hubbard, the founder of Scientology, announced the story of Xenu in a taped lecture sent to all Scientologists.
Queen Elizabeth 2
The Cunard Liner Queen Elizabeth 2 is launched in Clydebank, Scotland.
Greek case
Sweden, Norway, and Denmark submit the Greek case alleging human rights violations by the Greek junta.
World War II
Second World War: Allied forces captured San Marino from the German Army.
World War II
World War II: Australian troops led by Gordon Grimsley King defeated Imperial Japanese forces at the Battle of Kaiapit in New Guinea.
Irish War of Independence
Irish War of Independence: British auxiliary police officers known as Black and Tans went on a rampage in Balbriggan, burning more than fifty homes and businesses and killing two people.
RMS Mauretania (1906)
The ocean liner RMS Mauretania, the largest and fastest ship in the world at the time, was launched in Tyneside, England.
Bersaglieri
The Bersaglieri entered Rome through the Porta Pia, ending the temporal power of the Pope and completing the unification of Italy.
French Army
The French Army achieved its first major victory of the War of the First Coalition at the Battle of Valmy.
Peace of Ryswick
The first of a series of treaties comprising the Peace of Ryswick was signed between France and the Grand Alliance, ending the Nine Years' War.
First English Civil War
First English Civil War: The First Battle of Newbury was fought in Berkshire; Parliamentarian forces were allowed to pass Royalist troops to retreat the next morning.
1498 Meiō earthquake
A tsunami caused by the Meiō earthquake washed away the building housing the Great Buddha (pictured) at Kōtoku-in in Kamakura, Japan; the statue has since stood in the open air.
Births 20
A notable person born on this day. Each links to a person page with their dates and story.
Thomas Crooks
Thomas Matthew Crooks, American attempted assassin of Donald Trump (died 2024)
Deaths 20
A notable person who died on this day.
Daniel J. Evans
Daniel J. Evans, American politician, 16th Governor of Washington (born 1925)
George Sluizer
George Sluizer, French-Dutch director, producer, and screenwriter (born 1932)
Holidays & observances 8
A holiday, feast day, awareness day or national day observed every year on this date.
Jean-Charles Cornay
Christian feast day: Jean-Charles Cornay (one of Vietnamese Martyrs)
Saint Eustace
Christian feast day: Eustace (Western Christianity)
John Patteson (bishop)
Christian feast day: John Coleridge Patteson (commemoration, Anglicanism)
Saint Evilasius
Christian feast day: Evilasius
Fausta of Cyzicus
Christian feast day: Fausta of Cyzicus
José Maria de Yermo y Parres
Christian feast day: José Maria de Yermo y Parres
Glycerius (bishop of Milan)
Christian feast day: Glycerius of Milan
Korean Martyrs
Christian feast day: Korean Martyrs, including Andrew Kim Taegon and Laurent-Marie-Joseph Imbert
Spread across the centuries
- 15th century1
- 17th century2
- 18th century1
- 19th century1
- 20th century41
- 21st century29
Earliest: 1498 Meiō earthquake (1498). Most recent: Matt Beard (2025).
What the categories mean, and how the standout is chosen
- Historical events
- A dated happening — a battle, treaty, launch, discovery, disaster or decision — recorded on this calendar day.
- Births
- A notable person born on this day. Each links to a person page with their dates and story.
- Deaths
- A notable person who died on this day.
- Milestones
- A first, a founding or a turning point our editors flagged as a landmark moment.
- Holidays & observances
- A holiday, feast day, awareness day or national day observed every year on this date.
- Standout / notable
- Editor-written entries come first, then entries covered by the most Wikipedia language editions. For the standout tile we prefer an entry that has a picture.
Nearby and related
Questions about September 20
What day of the year is September 20?
September 20 is the 263rd day of the year, with 102 days left after it.
What star sign is September 20?
September 20 falls under Virgo (August 23 – September 22), a earth sign ruled by Mercury. The birthstone for the month is Sapphire.
How many things happened on September 20?
We record 83 entries for September 20: 35 events · 20 births · 20 deaths · 8 observances. From 1498 to 2025.
Who was born on September 20?
Thomas Crooks (2003) is among the notable births on September 20. The births section lists the rest.
How often is the September 20 page updated?
The day is filled the first time anyone opens it and then re-checked for new entries about every 90 days. Computed facts such as the weekday and the anniversaries update every year.
Get a daily entry like September 20
One short email a day from this calendar. Kept for this site only.
Text adapted from Wikipedia under CC BY-SA 4.0 and from Wikidata (CC0). Images come from Wikimedia Commons; credit and licence are shown with each image. Editorial entries are © What's On This Date. Sources & licensing · How this site works.