Charles Fort: A Fortean Chronology, 1910.

The year of 1910 (MCMX) was a common year starting on Saturday of the Gregorian calendar.

January

• In Greece, the Military League forces Parliament and George I of Greece to summon the National Assembly to revise the Constitution of Greece.
• January 16: Constant rains in Paris, France, cause the Seine to overflow its banks, flooding the city. All but one line of the Paris Métro become filled with water, effectively draining water from the city.

February

• February 8: The Boy Scouts of America youth organization is incorporated by William D. Boyce.
• February 16-18: The state of Ohio is crippled by a snowstorm.
• February 20: Boutros Ghali, the first native-born prime minister of Egypt, is assassinated.

March

• March: During an eruption of Mount Etna the people of Borelli pray that their shrine be saved from the flow of lava, which obligingly changed its course when it was upon the shrine. (Books1000)
• March 19: In the United States, Republicans reduce the powers of the Speaker of the House of Representatives to influence committee membership.
• March 21: Harry Houdini achieves one of the first powered flights in Australia.
• March 27: A fire during a barn-dance in Ököritófülpös, Hungary kills 3120.

April

• April 20: Comet Halley is visible from Earth.
• April 27: The British House of Commons passes David Lloyd George's (1909) 'People's Budget' for the second time; it is passed by the House of Lords on 28 April.
• April 29: Andrew Fisher becomes Prime Minister of Australia for the second time.

May

• May 4: Stones are seen to shoot up from the ground, Cantillana, Spain. (Books570)
• May 6: George V becomes King of the United Kingdom upon the death of his father, Edward VII.
• May 11: The U.S. Congress establishes Glacier National Park in Montana.
• May 16: The U.S. Congress authorizes the creation of the United States Bureau of Mines.
• May 18: The earth passes through the tail of Comet Halley.
• May 31: The Union of South Africa is created.

June

July

• July 2: Demonstrations erupt in France against public executions.
• July 4: African-American boxer Jack Johnson defeats American boxer James J. Jeffries in a heavyweight boxing match, sparking race riots across the United States.
• July 22: A wireless telegraph sent from the S.S. Montrose results in the identification and later arrest and execution of murderer Dr. Hawley Crippen.
• July 24: James MacGillivray publishes the first account of Paul Bunyan in the Detroit News.

August

• August 12: Captain Breyer of the steamer Valentijn at midnight in the South China Sea observed a rotation of flashes, what "looked like a horizontal wheel, turning rapidly", some distance above the sea. At about this time a white cylinder of marble fell upon Ohio, USA. (Books278)
• August 14: A fire at the World Exhibition in Brussels destroys exhibitions of Britain and France.
• August 17: An object thought to be a balloon is seen above a forest east of Dessau, Germany. It suddenly burst into flames and fell to earth, a search revealed noting! 
• August 20-21: The Great Fire of 1910 wildfire burns about 3 million acres (12,000 km²) in northeast Washington, northern Idaho, and western Montana over 2 days and kills 86 people.
• August 22: The Japan-Korea Annexation Treaty is signed.
• August 28: Montenegro is proclaimed an independent kingdom under Nicholas I.
• August 29: Emperor Sunjong of the Korean Empire abdicates and the country's monarchy is abolished.
• August 30: Seen above New York City - lights as if upon an airship. Aviators were interviewed and all known aircraft accounted for. (Books640) 

September

• September 1: The Vatican introduces a compulsory oath against modernism, to be taken by all priests upon ordination.
• September 16: The Australian Treasury is given authority to issue currency, replacing the use of the British Pound.
• September 21: A number of round objects are observed passing over the lower parts of New York City. (Books640)
• September 22: At Dunkirk, N.Y., an object described as an unknown cigar-shaped balloon, was seen in the sky. (Books640) 

October

• October 1: A bomb explodes at the Los Angeles Times building, leaving 21 dead and several injured. James B. McNamara and Joseph J. McNamara are later arrested and sentenced.
• October 5: Portugal becomes a republic; King Manuel II of Portugal flees to England.
• October 11: Theodore Roosevelt becomes the first president to ride in an airplane.
• October 20: The hull of the RMS Olympic is launched at the Harland and Wolff Shipyards in Belfast.

November

• November 7: The first air flight for the purpose of delivering commercial freight occurs between Dayton, Ohio and Columbus, Ohio by the Wright Brothers and department store owner Max Moorehouse. The trip was made by Wright pilot Philip Parmalee.
• November 17: Ralph Johnstone, a pilot for the Wright Exhibition Team, dies at Denver, Colorado after his machine breaks apart in mid air in full view of about 5,000 spectators. Johnstone becomes the first American pilot to die in the crash of an airplane in the United States.
• November 20: Mexican Revolution, Francisco I. Madero proclaims the elections of 1910 null and void, and calls for an armed revolution at 6 p.m. against the illegitimate presidency/dictatorship of Porfirio Díaz.
• November 22: U.S. Senator Aldrich and A.P. Andrews (Assistant Secretary of the Treasury Department), along with many of the country's leading financiers, who together represent about 1/6 of the world's wealth, are witnessed leaving Hoboken, New Jersey on a train together. They later arrive at the Jekyll Island Club to discuss monetary policy and the banking system, an event which some say is the impetus for the creation of the Federal Reserve.
• November 23; The last execution in Sweden (by guillotine) is carried out against murderer Johan Alfred Ander.

December

• British Prime Minister H. H. Asquith makes his second appeal in the same year to the electorate to resolve the battle of wills with the House of Lords (Liberals, 272; Labour, 42; Irish Nationalists, 84; Unionists, 272 – making a majority of 126 for restriction of the powers of the Lords and for Irish Home Rule).
• December 12: New York socialite Dorothy Arnold disappears. Her family does not notify the police until 6 weeks later, after their own investigations fail to produce any results.
• December 16: Henri Coandă makes the first short flight in a plane with a jet engine.

• December 16: In Houndsditch, London, 4 (Latvian) anarchists shoot 3 policemen in botched raid on a jeweller; 3 are arrested, other members of the gang escape but are later (January 1911) cornered in the 'siege of Sidney Street'.
• December 31: Two of America's premier pioneer aviators are killed on this day: John Moisant in New Orleans, and Wright pilot Arch Hoxsey in Los Angeles