International Translation Day – This day is observed every year on September 30 to celebrate the role of translators in promoting understanding, cooperation and development across different languages and cultures.
International Day of Older Persons – This day is observed to recognize the contributions of older persons to society and to raise awareness about the issues they face, such as age discrimination and social isolation.
World Heart Day – This day is observed every year to raise awareness about cardiovascular diseases and their prevention, as well as to promote heart-healthy lifestyles and access to medical care.
International Podcast Day – This day is celebrated annually on September 30 to recognize the power of podcasts as a medium for storytelling, education, and entertainment.
Blasphemy Rights Day International – This day is observed annually on September 30 to promote the right to freedom of expression and to highlight the harms caused by blasphemy laws and religious censorship.
International Day of Crystallography – This day is observed annually on September 30 to celebrate the science of crystallography, which studies the arrangement of atoms in crystals and has numerous applications in fields such as chemistry, materials science, and biology.
1399: Henry Bolingbroke becomes King Henry IV of England after deposing King Richard II.
1777: The Continental Army under General Horatio Gates defeats the British army under General John Burgoyne at the Battle of Saratoga, which is considered a turning point in the American Revolutionary War.
1846: Anesthetic ether is used for the first time in a successful surgical procedure, performed by Dr. William Morton in Boston, Massachusetts.
1938: British Prime Minister Neville Chamberlain signs the Munich Agreement, allowing Nazi Germany to annex the Sudetenland region of Czechoslovakia.
1955: Actor James Dean dies in a car crash at the age of 24, becoming a cultural icon of the 1950s.
1962: The United States and Soviet Union sign the Partial Nuclear Test Ban Treaty, banning nuclear weapons tests in the atmosphere, in outer space, and underwater.
2004: The first privately funded human spaceflight, SpaceShipOne, completes its second successful flight and wins the Ansari X Prize.
2013: The United Nations Intergovernmental Panel on Climate Change releases a report stating that it is extremely likely that human activities are the dominant cause of global warming observed since the mid-20th century.
