1st January » Turkey adopts the Gregorian calendar: December 18, 1926 (Julian), is immediately followed by January 1, 1927 (Gregorian).
2nd January » Angered by the anti-clerical provisions of the Constitution of Mexico or Mexican Constitution of 1917, Catholic rebels in Mexico Cristero War or rebelled against the government.
7th January » The first transatlantic telephone service is established from New York City named New York, New York to London named London, United Kingdom.
9th January » A fire at the Laurier Palace Theatre fire called Laurier Palace movie theatre in Montreal named Montreal, Quebec, Canada, kills 78 children.
11th January » Louis B. Mayer, head of film studio Metro-Goldwyn-Mayer (MGM), announces the creation of the Academy of Motion Picture Arts and Sciences, at a banquet in Los Angeles e.g Los Angeles, California.
22nd January » Teddy Wakelam gives the first live radio commentary of a association football football match anywhere in the world, between Arsenal F.C. and Sheffield United F.C. Sheffield United at Arsenal Stadium Highbury.
27th January » Ibn Saud takes the title of Kingdom of Nejd and Hejaz known as King of Nejd.
23rd February » U.S. President Calvin Coolidge signs a bill by United States Congress known as Congress establishing the Federal Radio Commission (later replaced by the Federal Communications Commission) which was to regulate the use of radio frequencies in the United St
23rd February » Germans known as German theoretical physics named theoretical physicist Werner Heisenberg writes a letter to fellow physicist Wolfgang Pauli, in which he describes his uncertainty principle for the first time.
11th March » In New York City, Samuel Roxy Rothafel opens the Roxy Theatre (New York City) known as Roxy Theatre.
24th March » Nanking Incident: Foreign warships bombard Nanjing, China, in defense of the foreign citizens within the city.
7th April » First long-distance public television broadcast (from Washington, D.C., to New York City, displaying the image of Commerce Secretary Herbert Hoover).
12th April » April 12 Incident: Chiang Kai-shek orders the Communist Party of China members executed in Shanghai, ending the First United Front (China) named First United Front.
14th April » The first Volvo automobile e.g car premieres in Gothenburg, Sweden.
15th April » The Great Mississippi Flood of 1927, the most destructive river flood in U.S. history, begins.
19th April » Mae West is sentenced to ten days in jail for obscenity for her play 'Sex (play) called Sex'.
23rd April » Cardiff City defeat Arsenal F.C. called Arsenal in the 1927 FA Cup Final e.g FA Cup Final, the only time it has been won by a team not based in England.
27th April » Carabineros de Chile (Chilean national police force and gendarmery) are created.
1st May » The first cooked meals on a scheduled flight are introduced on an Imperial Airways flight from London to Paris.
1st May » The Union Labor Life Insurance Company is founded by the American Federation of Labor.
8th May » Attempting to make the first non-stop transatlantic flight from Paris to New York, French war heroes Charles Nungesser and François Coli disappear after taking off aboard 'The White Bird' biplane.
9th May » The Parliament of Australia known as Australian Parliament first convenes in Canberra.
11th May » The Academy of Motion Picture Arts and Sciences is founded.
18th May » The Bath School disaster: forty-five people are killed by bombs planted by a disgruntled school-board member in Michigan.
18th May » After being founded for 20 years, the Government of the Republic of China (1912–49) named Republic of China approves Tongji University to be among the first national universities of the Republic of China.
20th May » Treaty of Jeddah (1927) named Treaty of Jeddah: the United Kingdom recognizes the sovereignty of King Ibn Saud in the Kingdoms of Hejaz and Najd or Nejd, which later merge to become the Kingdom of Saudi Arabia.
27th May » The Ford Motor Company ceases manufacture of the Ford Model T and begins to retool plants to make the Ford Model A (1927) named Ford Model A.
31st May » The last Ford Model T rolls off the assembly line after a production run of 15,007,003 vehicles.
13th June » Aviator Charles Lindbergh receives a ticker-tape parade down 5th Avenue in New York City.
26th June » The Cyclone roller coaster opens on Coney Island.
29th June » The 'Bird of Paradise (aircraft) called Bird of Paradise', a U.S. Army Air Corps Fokker tri-motor, completes the first transpacific flight, from the mainland United States to Hawaii.
15th July » July Revolt of 1927 or Massacre of July 15, 1927: Eighty-nine protesters are killed by the Austrian police in Vienna.
16th July » Augusto César Sandino leads a raid on U.S. Marines and Nicaraguan Guardia Nacional that had been sent to apprehend him in the village of Ocotal, but is repulsed by one of the first Dive bomber named dive-bombing attacks in history.
23rd July » The first station of the All India Radio e.g Indian Broadcasting Company goes on the air in Mumbai named Bombay.
24th July » The Menin Gate war memorial is unveiled at Ypres.
7th August » The Peace Bridge opens between Fort Erie, Ontario and Buffalo, New York.
8th August » The predecessor to the Philippine Stock Exchange opens.
16th August » The Dole Air Race begins from Oakland, California, to Honolulu called Honolulu, Hawaii, during which six out of the eight participating planes crash or disappear.
19th August » Sergius I of Moscow named Metropolitan Sergius proclaims the declaration of loyalty of the Russian Orthodox Church to the Soviet Union.
23rd August » Italian Anarchists Sacco and Vanzetti are executed after a lengthy, controversial trial.
5th September » The first Oswald the Lucky Rabbit cartoon, 'Trolley Troubles', produced by Walt Disney, is released by Universal Pictures.
7th September » The first fully electronic television system is achieved by Philo Farnsworth.
18th September » The Columbia Broadcasting System goes on the air.
22nd September » Jack Dempsey loses the "The Long Count Fight e.g Long Count" boxing match to Gene Tunney.
30th September » Babe Ruth becomes the first baseball player to hit 60 home runs in a season.
4th October » Gutzon Borglum begins sculpting Mount Rushmore.
6th October » Opening of 'The Jazz Singer', the first prominent talking movie.
22nd October » Nikola Tesla introduces six new inventions including a motor with onephase electricity
12th November » Leon Trotsky is expelled from the Soviet Communist Party, leaving Joseph Stalin in undisputed control of the Soviet Union.
13th November » The Holland Tunnel opens to traffic as the first Hudson River vehicle tunnel linking New Jersey to New York City.
21st November » Columbine Mine Massacre: Strike action known as Striking coal miners are allegedly attacked with machine guns by a detachment of state police dressed in civilian clothes.
2nd December » Following 19 years of Ford Model T production, the Ford Motor Company unveils the Ford Model A (1927) named Ford Model A as its new automobile.
3rd December » 'Putting Pants on Philip', the first Laurel and Hardy film, is released.
10th December » The phrase "Grand Ole Opry Name known as Grand Ole Opry" is used for the first time radio or on-air.
11th December » Guangzhou Uprising: Communist Party of China Communist Red Guards (China) Red Guards launch an uprising in Guangzhou, China, taking over most of the city and announcing the formation of a Guangzhou Soviet (council) Soviet.
17th December » Indian revolutionary Rajendra Lahiri is hanged in Gonda jail, Uttar Pradesh, India, two days before the scheduled date.
19th December » Three Indian revolutionaries, Ram Prasad Bismil, Roshan Singh and Ashfaqulla Khan are executed by the British Empire.
25th December » The Viet Nam Quoc Dan Dang named Vietnamese Nationalist Party is founded.
27th December » 'Show Boat', considered to be the first true American Musical theatre e.g musical play, opens at the Ziegfeld Theatre on Broadway theatre e.g Broadway.
30th December » The Tokyo Metro Ginza Line e.g Ginza Line, the first rapid transit or subway line in Asia, opens in Tokyo, Japan.