In History, Today on September 23

Greta Thunberg delivered a powerful speech at the United Nations Climate Action Summit, urging world leaders to take immediate action against climate change.

Volkswagen CEO Martin Winterkorn resigned amid the emissions scandal, where the company was found to have cheated on diesel emissions tests.

The United Nations Climate Summit took place in New York City, focusing on initiatives to combat climate change.

Palestinian President Mahmoud Abbas submitted Palestine's application for full membership in the United Nations.

The Large Hadron Collider (LHC) at CERN was officially inaugurated, marking a significant milestone in particle physics research.

Hurricane Jeanne made landfall in Haiti, causing severe flooding and landslides that resulted in over 3,000 deaths.

The first public version of the web browser Mozilla Firefox, then known as Phoenix 0.1, was released.

NASA announced that it had lost contact with the Mars Climate Orbiter due to a metric conversion error.

Saint Kitts and Nevis gained independence from the United Kingdom, becoming the newest nation in the world at that time.

Bob Marley performed his last concert at the Stanley Theatre in Pittsburgh, Pennsylvania, before his death in 1981.

Juan Perón returned to power in Argentina, marking a significant political development in the country's history.

BBC One aired the first episode of 'Monty Python's Flying Circus', marking a landmark in British television comedy.

The Lincoln Center for the Performing Arts opened in New York City, becoming a major cultural venue.

President Dwight D. Eisenhower ordered federal troop escort for the Little Rock Nine to the newly desegregated school, Central High School.

Richard Nixon delivered his "Checkers speech" on television, defending himself against accusations of improper campaign funding.

The Italian Social Republic was founded under Benito Mussolini, following the armistice between Italy and Allied forces.

Signalman Harry Colebourn donates a bear named Winnipeg, or 'Winnie,' to the London Zoo. This bear would later inspire the character of Winnie the Pooh.

The Kingdom of Saudi Arabia was unified by King Abdulaziz Ibn Saud, marking the establishment of the modern state.

Nintendo Koppai, later known as Nintendo Company, Limited, was founded by Fusajiro Yamauchi in Kyoto, Japan.

Grito de Lares, also known as the Lares uprising, marked an unsuccessful rebellion against Spanish rule in Puerto Rico.

German astronomer Johann Gottfried Galle discovered the planet Neptune, based on predictions by Urbain Le Verrier.

Lewis and Clark Expedition returned to St. Louis after exploring the Pacific Northwest.

During the American Revolutionary War, the Battle of Flamborough Head took place. The American Continental Navy, led by John Paul Jones, captured the British warship HMS Serapis.

The first commencement exercises were held at Harvard College, the first institution of higher learning in the United States.

The Swedish army, led by Charles IX, defeated King Sigismund III of Poland in the Battle of Stångebro during the Polish-Swedish War (1600–1611), solidifying Charles IX's control over Sweden.

The Battle of Blore Heath, part of the Wars of the Roses, took place in England, resulting in a victory for the Yorkists.

The Concordat of Worms was signed, ending the Investiture Controversy between the Papacy and the Holy Roman Empire.

The Battle of Dara took place between the Byzantine Empire and the Sassanid Empire. It was part of the Iberian War, where the Byzantines, led by General Belisarius, achieved a significant victory.

The Roman Emperor Augustus was born as Gaius Octavius Thurinus in Rome. He later became the first emperor of the Roman Empire, ruling from 27 BC until his death in AD 14.