The Imperial Japanese Navy sends aircraft to attack the U.S. Pacific Fleet and its defending air forces at Pearl Harbor, Hawaii. While the U.S. lost battleships and other vessels, its aircraft carriers were not at Pearl Harbor and survived intact, robbing the Japanese of the total destruction of the Pacific Fleet they had hoped to achieve.

In Montreal, Canada, at the École Polytechnique, a gunman shoots twenty-eight young women with a semi-automatic rifle, killing fourteen. The gunman claimed to be fighting feminism, which he believed had ruined his life. After the killings he turns the gun on himself and commits suicide.

Utah becomes the 36th U.S. state to ratify the 21st Amendment to the United States Constitution, thus establishing the required 75% of states needed to overturn the 18th Amendment which had made the sale of alcohol illegal. But the criminal gangs that had gained power during Prohibition are now firmly established, and maintain an influence that continues unabated for decades.

During an overwater navigation training flight from Fort Lauderdale, five U.S. Navy TBM Avenger torpedo-bombers lose radio contact with their base and vanish. The disappearance takes place in what is popularly known as the Bermuda Triangle.

U.S. President Woodrow Wilson sails to Europe for the World War I peace talks in Versailles, France, becoming the first U.S. president to travel to Europe while in office.

In the U.S., a manslaughter trial against actor/director Roscoe ‘Fatty’ Arbuckle ends with the jury deadlocked as to whether he had killed aspiring actress Virginia Rappe during rape and sodomy. Arbuckle was finally cleared of all wrongdoing after two more trials, but the scandal ruined his career and personal life.