September 09: Fun Facts about Today in History

Today in History

On September 9, learn about the most interesting events and historical facts that occurred throughout history. The Gregorian calendar’s 252nd day is September 9. On this day, Washington, D.C. was named the United States’ capital, California was accepted as the country’s 31st state, and Elizabeth II became the UK’s longest-reigning monarch.

Virgo is the zodiac sign for September 9th. Adam Sandler, Michelle Williams, and Hugh Grant all have famous birthdays. Day of the Homeland, European Heritage Days, International Sudoku Day, National Grandparents Day, National Wiener Schnitzel Day, and Rosh Hashanah are all celebrated on September 9.


(September 09, 1850)
California joined the United States as the thirty-first state. photo source:


(September 09, 1972)
The Cave Research Foundation's exploration and mapping team finds a connection between the Mammoth and Flint Ridge cave systems in Kentucky's Mammoth Cave National Park, creating the longest known cave route in the world. photo source:

(September 09, 1976)
Mao Zedong, who died on this day in 1976, was the unchallenged leader of the Chinese Communist Party after the Long March (1934–35). photo source:

(September 09, 1990)
Pete Sampras, an American tennis player, defeated Andre Agassi at the US Open to win his first of 14 Grand Slam singles titles.

(September 9, 1991)
Tajikistan Independence Day.

(September 09, 2015)
Elizabeth II, who exceeded the reign of her great-great-grandmother Victoria, became the longest-reigning British monarch. photo source:

Written by James

James has always been intrigued by dinosaurs, the universe, technology, and animals. With a Bachelor of Computer Science and years of writing expertise, he joined World Amazing Facts in 2021 as a staff writer.

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