International observance days, weeks, and months for September 20, 2026. Plus historical events and birthdays.
September 20, 2026 celebrates Yom Kippur. Yom Kippur (pronounced Yohm Kee-POOR) is the most holiest and sacred day of reflection in Judaism. Translated from Hebrew to "Day of Atonement," Yom Kippur is considered a somber day to reflect, repent, and ask for forgiveness for sins committed in the past year through prayer.
Read the full story →People born on September 20
Inventor involved in the development of margarine, polyester, paint and varnish remover.
Editor and publisher for literary greats Ernest Hemingway, F. Scott Fitzgerald and Thomas Wolfe.
Blown glass sculptor known for his large-scale sculptures.
Events that occurred on September 20 throughout history
The Walking Purchase concludes, which forces the cession of 1.2 million acres of Lenape-Delaware tribal land to the Pennsylvania Colony. One hundred years later, experts analyzed the deed and concluded it was a forgery.
The Star Spangled Banner is published as a song. The "song" was originally written by Francis Scott Key as a poem Defence of Fort McHenry.
The American Association for the Advancement of Science is created. The Association was the first permanent, national organization that connected all scientific fields and disciplines in the U.S.
The slave trade is abolished in Washington, DC, but allowed to continue. Owning and holding enslaved people remained legal, but buying and selling a slave stopped.
The first FORTRAN computer program runs at IBM. It was the first successful test compilation and execution of a computer program using high-level programming language.
The future King Edward VII of the United Kingdom begins the first visit to the U.S. by a Prince of Wales. The visit lasted until lasted until November 15.
President Chester A. Arthur is sworn in as the 21st President following the death of President Garfield. President James A. Garfield died on September 19, 1881, after complications from an assassination attempt by Charles J. Guiteau on July 2, 1881.
Law & Order: Special Victims Unit premiers on television, airing 594 original episodes in 28 seasons. The series is still shown on NBC.
President George W. Bush declares a "war on terror" during his address to a joint session of Congress and the American people.