1st January » The Republic of China (1912–1949) called Republic of China is established.
4th January » The Scout Association is incorporated throughout the Commonwealth of Nations or British Commonwealth by Royal charter.
5th January » The Prague Party Conference takes place.
6th January » New Mexico is admitted as the 47th U.S. state.
6th January » Germany called German Geophysics known as geophysicist Alfred Wegener first presents his theory of continental drift.
8th January » The African National Congress is founded.
11th January » Immigrant textile works in Lawrence, Massachusetts, 1912 Lawrence Textile Strike e.g go on strike when wages are reduced in response to a mandated shortening of the work week.
17th January » Captain Robert Falcon Scott Terra Nova Expedition or reaches the South Pole, one month after Roald Amundsen.
23rd January » The International Opium Convention is signed at The Hague.
12th February » The Puyi or Xuantong Emperor, the last Emperor of China, abdication or abdicates.
14th February » Arizona is admitted as the 48th U.S. state.
14th February » In Groton, Connecticut, the first diesel engine e.g diesel-powered submarine is commissioned.
25th February » Marie-Adélaïde, Grand Duchess of Luxembourg Marie-Adélaïde, the eldest of six daughters of Guillaume IV, Grand Duke of Luxembourg Guillaume IV, becomes the first reigning Grand Duke of Luxembourg Grand Duchess of Luxembourg.
1st March » Albert Berry (parachutist) known as Albert Berry makes the first parachute jump from a moving airplane.
5th March » Italo-Turkish War: Kingdom of Italy or Italian forces are the first to use airships for military purposes, employing them for reconnaissance behind Ottoman Empire or Turkish lines.
6th March » Italy known as Italian forces became the first to use airships in war, as two dirigibles dropped bombs on Turkish troops encamped at Janzur, from an altitude of 6,000 feet.
7th March » Roald Amundsen announces that his expedition had reached the South Pole on December 14, 1911.
12th March » The Girl Guide and Girl Scout called Girl Guides (later renamed the Girl Scouts of the USA) are founded in the United States.
30th March » King of Morocco Sultan Abdelhafid of Morocco Abdelhafid signs the Treaty of Fez, making Morocco a France French protectorate.
2nd April » The ill-fated RMS or Titanic begins sea trials.
10th April » 'RMS Titanic' sets sail from Southampton, England on her maiden and only voyage.
14th April » The British passenger liner RMS or Titanic hits an iceberg in the North Atlantic at 23:40 (sinks morning of April 15th).
15th April » The British passenger liner RMS called Titanic sinks in the Atlantic Ocean named North Atlantic at 2:20 a.m., two hours and forty minutes after hitting an iceberg. Only 710 of 2,227 passengers and crew on board survive.
16th April » Harriet Quimby becomes the first woman to fly an Aircraft known as airplane across the English Channel.
17th April » Russian Empire named Russian troops Lena massacre called open fire on striking goldfield workers in northeast Siberia, killing at least 150.
18th April » The Cunard Line Cunard liner RMS Carpathia brings 705 survivors from the RMS Titanic to New York City.
22nd April » 'Pravda', the "voice" of the Communist Party of the Soviet Union, begins publication in Saint Petersburg.
4th May » Italy occupies the Greece called Greek island of Rhodes.
13th May » The Royal Flying Corps, the forerunner of the Royal Air Force, is established in the United Kingdom.
18th May » The first Cinema of India e.g Indian film, 'Shree Pundalik' by Dadasaheb Torne is released in Mumbai.
4th June » Massachusetts becomes the first state of the United States to set a minimum wage.
6th June » The eruption of Novarupta in Alaska begins. It is the second largest volcanic eruption of the 20th century.
8th June » Carl Laemmle incorporates Universal Studios called Universal Pictures.
10th June » The Villisca Axe Murders were discovered in Villisca, Iowa.
8th July » Henrique Mitchell de Paiva Couceiro leads Royalist attack on Chaves called an unsuccessful royalist attack against the First Portuguese Republic in Chaves Municipality, Portugal or Chaves.
6th August » The Progressive Party (United States, 1912) called Bull Moose Party meets at the Chicago Coliseum.
14th August » United States Marine Corps called U.S. Marines invade Nicaragua to support the U.S.-backed government installed there after José Santos Zelaya had resigned three years earlier.
25th August » The Kuomintang, the China known as Chinese nationalist party, is founded.
2nd September » Arthur Rose Eldred is awarded the first Eagle Scout (Boy Scouts of America) named Eagle Scout award of the Boy Scouts of America.
4th September » Albanian rebels succeed in Albanian Revolt of 1912 e.g their revolt when the Ottoman Empire agrees to fulfill their demands
25th September » Columbia University Graduate School of Journalism is founded in New York City.
28th September » The Ulster Covenant is signed by half a million Ulster Protestants in opposition to the Third Irish Home Rule Bill.
28th September » Corporal Frank S. Scott of the United States Army becomes the first enlisted man to die in an airplane crash. He and pilot Lt. Lewis C. Rockwell are killed in the crash of an Army Wright Model B at College Park, Maryland.
3rd October » U.S. forces defeat Nicaraguan rebels under the command of Benjamín Zeledón at the Battle of Coyotepe Hill.
7th October » The Helsinki Stock Exchange sees its first transaction.
8th October » Balkan Wars or First Balkan War begins: Montenegro declares war against the Ottoman Empire.
11th October » First Balkan War: The Hellenic Army or Greek Army liberates the city of Kozani.
14th October » While campaigning in Milwaukee, Wisconsin, the former President of the United States, Theodore Roosevelt, is shot and mildly wounded by John Schrank, a mentally-disturbed saloon keeper. With the fresh wound in his chest, and the bullet still within it, Mr
17th October » Bulgaria, Greece and Serbia declare war on the Ottoman Empire, joining Montenegro in the First Balkan War.
18th October » First Balkan War: King Peter I of Serbia issues a declaration "To the Serbian People", as his country joins the war.
19th October » Italy takes possession of Tripoli, Libya from the Ottoman Empire.
21st October » First Balkan War: Kardzhali is liberated by Kingdom of Bulgaria e.g Bulgarian forces
23rd October » First Balkan War: The Battle of Kumanovo between the Kingdom of Serbia known as Serbian and Ottoman Empire known as Ottoman armies begins.
24th October » First Balkan War: The Battle of Kumanovo concludes with the Kingdom of Serbia known as Serbian victory.
26th October » First Balkan War: The Ottoman occupied city of Thessaloniki, is liberated and unified with Greece on the feast day of its patron Saint Saint Demetrius named Demetrius. On the same day, Kingdom of Serbia e.g Serbian troops captured Skopje.
5th November » Woodrow Wilson is elected to the presidency of the United States.
12th November » King George I of Greece makes a triumphal entry into Thessaloniki after its liberation from 482 years of Ottoman rule.
12th November » The frozen bodies of Robert Falcon Scott or Robert Scott and his men are found on the Ross Ice Shelf in Antarctica.
19th November » First Balkan War: The Serbian Army Battle of Monastir named captures Bitola, ending the five-century-long Ottoman rule of Macedonia (region) known as Macedonia.
27th November » Spain declares a protectorate over the north shore of Morocco.
28th November » Albania Albanian Declaration of Independence or declares its independence from the Ottoman Empire.
3rd December » Bulgaria, Greece, Montenegro, and Serbia (the Balkan League) sign an armistice with the Ottoman Empire, temporarily halting the First Balkan War. (The armistice will expire on February 3, 1913, and hostilities will resume.)
8th December » Leaders of the German Empire hold an German Imperial War Council of 8 December 1912 e.g Imperial War Council to discuss the possibility that war might break out.
18th December » The Piltdown Man, later discovered to be a hoax, is announced by Charles Dawson.
19th December » William Van Schaick, captain of the Steamboat e.g steamship 'PS General Slocum or General Slocum' which caught fire and killed over 1,000 people, is pardoned by U.S. President William Howard Taft after three-and-a-half-years in Sing Sing prison.
28th December » The first San Francisco Municipal Railway municipally owned Tram streetcars take to the streets in San Francisco San Francisco, California.