International observance days, weeks, and months for September 18, 2026. Plus historical events and birthdays.
September 18, 2026 celebrates World Bamboo Day, plus 1 more. Every year on September 18th, World Bamboo Day raises awareness about this fast-growing plant. The day also recognizes the importance of bamboo on a global scale.
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Every year on September 18, World Water Monitoring Day aims to increase public awareness for water monitoring and recognizes the importance of protecting the world’s water resources.
Read the full story →People born on September 18
A Continental Congressman from Delaware, President of Delaware, and a member of the Federalist Party who signed the Declaration of Independence.
Known as "Madman," Mantz was an auto racer and winner of the first 500-mile race in NASCAR history.
Teen idol and singer of Venus, Why, and Beauty School Dropout.
Neurosurgeon who lead a team surgeons in the first-known successful separation of conjoined twins (back of the head).
Actor fondly remembered for his award-winning role as of Tony Soprano in The Sopranos.
Events that occurred on September 18 throughout history
John Harris builds the first spinet piano.
President George Washington lays the first cornerstone of the U.S. Capitol. The President and Masonic leaders used corn, wine, and oil to consecrate the stone to perform Masonic rituals to mark the landmark event.
Charles Lewis Tiffany and Teddy Young open Tiffany and Young. The store sold stationery, gifts, and fancy goods. The company later changed their name to Tiffany and Company.
Congress passed the Fugitive Slave Law, requiring slaves be returned to their owners. Anyone who helped a runaway or blocked an arrest faced a fine of up to $500
The New-York Daily Times newspaper is published for the first time. The four page paper sold for one-cent. The paper is now known as The New York Times.
Spiritualist Daniel Palmer gives the first chiropractic adjustment as an alternative medical treatment.
The Columbia Broadcasting System (CBS) goes on the air. The program was a live musical presentation of The King’s Henchmen.
The Central Intelligence Agency (CIA) officially comes into existence, eight months after President Harry S. Truman established the office.
The Addams Family premiers. The sitcom ran 64 episodes for two seasons between 1964 and 1966.
Joe Kittinger completes the first solo balloon crossing of the Atlantic, traveling 3,543 miles across over 86 hours.