On September 27, 622, the prophet Muhammad completes his Hegira, or “flight,” from Mecca to Medina to escape persecution. In Medina, Muhammad set about building the followers of his religion—Islam—into an organized community and Arabian power. The Hegira would later mark the beginning (year 1) of the Muslim calendar.

On September 27, 1779, the Continental Congress appoints John Adams to travel to France as minister plenipotentiary in charge of negotiating treaties of peace and commerce with Great Britain during the Revolutionary War.

Just after midnight on September 27, 1869, Ellis County Sheriff Wild Bill Hickok and his deputy respond to a report that a local ruffian named Samuel Strawhun and several drunken buddies were tearing up John Bitter’s Beer Saloon in Hays City, Kansas. When Hickok arrived and ordered the men to stop, Strawhun turned to attack him, and Hickok shot him in the head. Strawhun died instantly, as did the riot.

On September 27, 1915, Second Lieutenant John Kipling of the British army, the only son of Nobel Prize-winning author Rudyard Kipling, is killed at the Battle of Loos, in the Artois region of France.

On September 27, 1939, 140,000 Polish troops are taken prisoner by the German invaders as Warsaw surrenders to Hitler’s army. The Poles fought bravely, but were able to hold on for only 26 days.

Rachel Carson’s watershed work Silent Spring is first published on September 27, 1962. Originally serialized in The New Yorker magazine, the book shed light on the damage that man-made pesticides inflict on the environment. Its publication is often viewed as the beginning of the modern environmentalist movement in America.

Hollywood socialite Zsa Zsa Gabor, on trial for slapping a police officer, storms out of the courtroom in the middle of the district attorney’s closing argument. The prosecutor told the jury that Gabor “craves media attention . . . and abused two weeks of this process for her own self-aggrandizement.” Although her attorney objected when the prosecutor said, “the defendant doesn’t know the meaning of truth,” Gabor was already running out in tears.