September 2 is the 245th day of the year. 120 days remain until the end of the year.
- 1778 – Louis Bonaparte, French-Dutch king (d. 1846)
- 1838 – Liliʻuokalani of Hawaii (d. 1917)
- 1850 – Albert Spalding, American baseball player, manager, and businessman, co-founded the Spalding Sporting Goods Company (d. 1915)
- 1927 – Milo Hamilton, American sportscaster (d. 2015)
- 1964 – Keanu Reeves, Lebanese-Canadian actor, singer, and producer
- 1969 – K-Ci, American R&B singer-songwriter
- 1971 – Tommy Maddox, American football player and coach
- 1979 – Brian Westbrook, American football player
- 1991 – Gyasi Zardes, American footballer for Columbus Crew SC
- 1998 – Austin Cindric, American racing driver
- 421 – Constantius III, Roman emperor
- 1820 – Jiaqing Emperor of China (b. 1760)
- 1922 – Henry Lawson, Australian poet and author (b. 1867)
- 1964 – Alvin C. York, American colonel, Medal of Honor recipient (b. 1887) aka Sargent York
- 1969 – Ho Chi Minh, Vietnamese politician, 1st President of Vietnam (b. 1890)
- 1973 – J. R. R. Tolkien, English novelist, short story writer, poet, and philologist (b. 1892)
- 2005 – Bob Denver, American actor (b. 1935)
- 1666 – The Great Fire of London breaks out and burns for three days, destroying 10,000 buildings, including Old St Paul’s Cathedral.
- 1752 – Great Britain, along with its overseas possessions, adopts the Gregorian calendar.
- 1789 – The United States Department of the Treasury is founded.
- 1901 – Vice President of the United States Theodore Roosevelt utters the famous phrase, “Speak softly and carry a big stick” at the Minnesota State Fair.
- 1912 – Arthur Rose Eldred is awarded the first Eagle Scout award of the Boy Scouts of America.
- 1935 – The Labor Day Hurricane, the most intense hurricane to strike the United States, makes landfall at Long Key, Florida, killing at least 400.
- 1945 – World War II: Combat ends in the Pacific Theater: The Japanese Instrument of Surrender is signed by Japanese Foreign Minister Mamoru Shigemitsu and accepted aboard the battleship USS Missouri in Tokyo Bay.
- 1945 – Vietnam declares its independence, forming the Democratic Republic of Vietnam.
- 1963 – CBS Evening News becomes U.S. network television’s first half-hour weeknight news broadcast, when the show is lengthened from 15 to 30 minutes.
- Labor Day (US)
- Victory over Japan Day
- Pierce Your Ears Day
- National Blueberry Popsicle Day
- World Coconut Day
- Mouthguard Day