Roaring  Twenties  Era
- 1920: Good Humor® chocolate-dipped ice cream bar on a stick invented by Harry Burt at the Burt Confectionery in Youngstown, Ohio.
- 1920: Swift & Company introduced E.K Pond commercial peanut butter; later adopted hydrogenation technology to become the first emulsified peanut butter sold to the public; changed name to Peter Pan Peanut Butter in 1928.
- 1920 Jan 2: Birthday of author Isaac Asimov; he died in 1992.
- 1920 Jan 16: 18th Amendment prohibiting production & sale of alcoholic beverages declared to be in effect, starting the Prohibition Era.
- 1920 Feb 14: Founding of the League of Women Voters.
- 1920 April 15: Two employees were killed and nearly $16,000 in payroll money taken at the Slater & Morrill Shoe Factory in South Braintree, Massachusetts; the killers escaped in a car with several other men; anarchists Sacco & Vanzetti were executed for the crime in 1927.
- 1920 May 19: Striking miners and local police defended the town of Matewan, West Virginia against hoodlums hired by mine owners; the gunfight resulted in 12 deaths, including the mayor.
- 1920 Aug 26: 19th Amendment guaranteeing women the vote was declared to be in effect.
- 1920 Aug 29: Birthday of jazzman Charlie 'Bird' Parker; he died in 1955.
- 1920 Sept 17: Founding of the American Professional Football Assn. (a precursor of the National Football League) in Canton, Ohio.
- 1920 Oct 22: Birthday of counterculture icon Timothy Leary, PhD; he died in 1996.
- 1921
- Eskimo Pie™ chocolate-dipped ice cream bar went on the market, produced by Russell Stover Candies®.
- Character 'Betty Crocker' created to respond to cooking & baking questions received from a Gold Medal flour advertisement in Saturday Evening Post Magazine.
- Launch of the Baby Ruth® candy bar.
- 1921 May 3: West Virginia imposed the first state sales tax.
- 1921 May 21: Taggart Baking Company of Indianapolis, Indiana introduced Wonder® bread.
- 1921 July 14: A jury found Italian anarchists Bartolomeo Vanzetti and Nicola Sacco guilty in the Braintree robbery & killings; the two Italian anarchists were executed for the crime in 1927.
- 1921 Aug 25: U.S. signed a peace treaty with Germany.
- 1921 Nov 11: President Harding dedicated the Tomb of The Unknown Soldier at Arlington National Cemetery in Washington, DC.
- 1922 Jan 24: Patent for Eskimo Pie™ chocolate-dipped ice cream bar issued to Christian K. Nelson of Onawa, Iowa and Russell Stover of Chicago, Illinois.
- 1922 March 12: Birthday of Beat writer Jack Kerouac in Lowell, MA; he died in 1969.
- 1922 May 30: Dedication of the Lincoln Memorial in Washington, DC by Chief Justice William Howard Taft.
- 1922 Sept: Clarence Birdseye founded Birdseye Seafoods, Inc. in New York City to process flash-frozen fish fillets.
- 1922 Nov 11: Birthday of author Kurt Vonnegut, Jr.; he died in 2007.
- 1923: Russell Stover Candies® went on the market.
- 1923 Feb 14: Velveeta Cheese Company incorporated in Monroe, New York; sold to Kraft in 1927.
- 1923 March 2: Launch of Time Magazine by Henry R. Luce.
- 1923 May 2-3: First nonstop flight across America took 26 hours and 50 minutes.
- 1923 Sept 17: Birthday of singer / songwriter Hank Williams; he died in 1953.
Timelines of History 1924-25
- 1924
- Pyrex® cookware went on the market.
- First U.S. execution using hydrocyanic gas, of a Chinese tong member at the Nevada State Prison in Carson City.
- Painted roadway center lines law passed by California legislature after a long campaign by Dr. June McCarroll of Indio, California.
- Whole wheat flakes ready-to-eat breakfast cereal accidentally invented by a health clinician in Minneapolis; process perfected by George Cormack, head miller at Washburn Crosby Co.; eventually marketed as Wheaties®.
- 1924 Feb 8: First coast-to-coast radio broadcast.
- 1924 Feb 22: Calvin Coolidge delivered the first radio broadcast from the White House.
- 1924 May 10: J. Edgar Hoover appointed Director of the F.B.I.
- 1924 June 2: Congress granted U.S. citizenship to all American Indians.
- 1924 Aug 2: Birthday of author James Baldwin; he died in 1987.
- 1924 Aug 5: Harold Gray's comic strip Little Orphan Annie began in the New York Times.
- 1924 Nov: Launch of Wheaties® Whole Wheat Flakes ready-to-eat breakfast cereal.
- 1924 Nov 25: Macy's Department Store held its first Thanksgiving Parade in New York City.
- 1925: Beginning of the Goodyear blimp program.
- 1925 Feb 21: Birthday of film director Sam Peckinpah; he died in 1984.
- 1925 Mar 13: Tennessee law made teaching of evolution there unlawful.
- 1925 May 19: Birthday of activist Malcolm X; he died in 1965.
- 1925 May 27: Birthday of mystery author Tony Hillerman.
- 1925 June 6: Founding of the Chrysler Corporation by Walter Percy Chrysler.
- 1925 July 10: Scopes 'Monkey Trial' began in Dayton, Tennessee.
- 1925 July 21: John T. Scopes convicted, fined $100; conviction overturned on appeal.
- 1925 Nov 28: The 'Grand Ole Opry' radio program made its debut on Nashville's WSM.
Timelines of History 1926-27
- 1926 March 16: Dr. Robert H. Goddard successfully launched the first liquid-fueled rocket near Auburn, Massachusetts.
- 1926 June 3: Birthday of Beat poet Allen Ginsberg; he died in 1997.
- 1926 July 2: The U.S. Army Air Corps was established.
- 1926 Aug 6: Warner Bros. premiered "Don Juan" in New York City, the first film using the Vitaphone sound-on-disc system (featuring music & sound effects).
- 1926 Nov 15: The National Broadcasting Company debuted with a radio network of 24 stations.
- 1927: Edwin E. Perkins invented Kool-Aid® in Hastings, Nebraska; celebrated at the town's
'Kool-Aid Days' in August.
- 1927 Jan 29: Birthday of eco-activist / author Edward Abbey; he died in 1989.
- 1927 April 9: After lengthy appeals, Italian anarchists Bartolomeo Vanzetti and Nicola Sacco were sentenced to death by Judge Thayer.
- 1927 May 4: Founding of the Academy of Motion Picture Arts & Sciences.
- 1927 May 19-20: Aviator Charles Lindbergh made the first successful solo flight across the Atlantic Ocean, traveling nonstop from Roosevelt Field in Long Island, New York to Paris, France in 33.5 hours.
- 1927 August 23: Executions of unjustly-convicted Italian anarchists Bartolomeo Vanzetti and Nicola Sacco, along with bankrobber Celestino Madeieros.
- 1927 Sept 7: Invention of all-electronic television by Philo T. Farnsworth [1906-71].
- 1927 Sept 18: Debut of the Columbia Phonograph Broadcasting System [later C.B.S.] with a network of 16 radio stations.
- 1927 Sept 23: Invention of all-electronic television by Philo T. Farnsworth.
- 1927 Oct 6: Talking pictures arrived with the opening of "The Jazz Singer", starring Al Jolson; the movie featured both silent & synchronous-sound scenes.
- 1927 Dec 2: Ford Motor Company unveiled the 'Model A' automobile, successor to the Model T.
- 1928
- Jolly Green Giant® brand placed on the market.
- William Dreyer partnered with candy-maker Joseph Edy to found a small ice cream factory in Oakland, California.
- Launch of Reese's Peanut Butter Cups.
- 1928 March 12: Release of "The Treasurer's Report", a hilarious short starring Robert Benchley, which is actually the first ALL-sound movie in general release.
- 1928 June 17-18: Amelia Earhart becomes the first woman to fly across the Atlantic.
- 1928 June 20: Founding of General Mills, Inc. by merger of 5 companies.
- 1928 Nov 18: The first successful synchronous sound animated cartoon premiered in New York City - Walt Disney's "Steamboat Willie", starring Mickey Mouse.
- 1929 Jan 15: Birthday of civil rights leader Rev. Martin Luther King, Jr. in Atlanta, GA; he died in 1968.
- 1929 Jan 17: Popeye the Sailor appeared in the first dialy "Thimble Theater" comic strip.
- 1929 Feb 14: Chicago's Al Capone machine-gunned to death seven rivals in the 'St. Valentine's Day Massacre'.
- 1929 Feb 26: President Coolidge signed legislation establishing Grand Teton National Park.
- 1929 May 16: First Academy Awards banquet.
- 1929 Oct 28: Stock market crashes! #3 worst one-day Dow-Jones Industrial Average decline of 12.82%, closing at 260.64.
- 1929 Oct 29: Stock market crashes! #4 worst one-day Dow-Jones Industrial Average decline of 11.73%, closing at 230.07; the infamous 'Black Tuesday' collapse of the New York stock market began America's 'Great Depression'.
- 1929 Nov 6: Stock market crashes! #5 worst one-day Dow-Jones Industrial Average decline of 9.92%.
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