| January 1 | DW Griffith shows "Clansman" at a sneak preview |
| January 1 | Jews of Laibach Austria expelled |
| January 4 | 1st elected Jewish governor, Moses Alexander, takes office in Idaho |
| January 4 | Trans-Caucausus Russian defeat Turkish troops |
| January 9 | Exposition (now Civic) Auditorium dedicated, SF |
| January 11 | Col Jacob Ruppert and Col Tillinghast Huston purchase Yankees for $460,000 |
| January 12 | House of Representatives rejects proposal to give women right to vote |
| January 13 | Earthquake in Avezzano Italy kills 29,800 |
| January 13 | Winston Churchill presents plan for assault on Dardanelles |
| January 15 | Japan claims economic control of China |
| January 15 | Sydney, Kern and Smith's musical "Love o' Mike," premieres in New York City |
| January 16 | Congress authorizes $1 and $50 Panama-Pacific International Expo gold coin |
| January 17 | Antoni van Leeuwenhoek's Hospital in Amsterdam opens |
| January 17 | Russia occupies Bukovina and Western Ukraine |
| January 18 | Train crashes at Colima-Guadalajara Mexico, about 600 die |
| January 19 | 1st German Zeppelin attack over Great Britain, 4 die |
| January 19 | Neon Tube sign patented by George Claude |
| January 21 | Kiwanis International founded in Detroit |
| January 24 | German-British sea battle at Doggersbank and Helgoland |
| January 25 | Alexander Graham Bell in New York calls Thomas Watson in SF |
| January 25 | Giordano, Sardou and Moreau's opera "Madame Sans Gane" premieres in New York City |
| January 25 | Transcontinental telephone service inaugurated (New York to SF) |
| January 26 | Rocky Mountain National Park, Colorado established |
| January 27 | U.S. Marines occupy Haiti |
| January 28 | 1st U.S. ship lost in WW I, William P Frye (carrying wheat to UK) |
| January 28 | U.S. Coast Guard created from Life Saving and Revenue Cutter services |
| January 28 | U.S. President Wilson refuses to prohibit immigration of illiterates |
| January 30 | German submarine attack on Le Havre |
| January 30 | No 10 batsman F W Hyett scores century on debut, Vic vs. Tas |
| January 31 | 1st German poison gas attack, against Russians |
| February 3 | Turkish and German army reach Suez Canal |
| February 4 | Experiments to find cause of pellagra begin at Miss Penitentiary |
| February 7 | 1st wireless message sent from a moving train to a station received |
| February 7 | 2nd Battle of Masurian Lakes: German armies surrounded a Russian army |
| February 8 | "Birth of a Nation" opens at Clune's Auditorium in LA |
| February 12 | Cornerstone laid for Lincoln Memorial in Washington D.C. |
| February 16 | Frank Home Run Baker, 28, announces retirement following a contract dispute with Connie Mack. He sits out 1915 season |
| February 17 | Edward Stone, 1st U.S. combatant to die in WW I, is mortally wounded |
| February 18 | Germany begins a blockade of England |
| February 19 | British fleet fire on Dardanellen coast |
| February 20 | Panama-Pacific International Exposition opens in San Francisco |
| February 21 | 20th Russian Army corps surrenders |
| February 21 | World's Fair in San Francisco opens |
| February 22 | Germany begins "unrestricted" submarine war |
| February 23 | Germany sinks U.S. ships Carib and Evelyn and torpedoes Norwegian ship Regin |
| February 23 | Nevada enforces convenient divorce law |
| March 2 | British vice adm Carden begins bombing of Dardanelles forts |
| March 2 | Vladmir Jabotinsky forms a Jewish military force to fight in Palestine |
| March 3 | National Advisory Committee for Aeronautics (NASA forerunner) created |
| March 6 | Greek King Constantine I fires premier Venizelos |
| March 8 | 1st U.S. Navy minelayer, Baltimore, commissioned |
| March 10 | British expedition Army in Belgium captures Neuve Chapelle |
| March 13 | Dodgers manager Wilbert Robinson tries to catch a baseball dropped from an airplane, but the pilot substituted a grapefruit |
| March 14 | German cruiser Dresden blows itself up near coast of Chile |
| March 15 | Netherlands merchant ship Tubantia torpedoed and sinks in North Sea |
| March 16 | British battle cruisers Inflexible and Irresistible hit mines in Dardanelle |
| March 16 | Federal Trade Commission organizes |
| March 18 | Failed British attack in Dardanelles |
| March 18 | French battleship Bouvet explodes, 640 killed |
| March 19 | Pluto photographed for 1st time (although unknown at the time) |
| March 23 | Zion Mule Corp forms |
| March 25 | 1st submarine disaster; a U.S. F-4 sank off Hawaii, killing 21 |
| March 25 | German U boat torpedoes Netherlands merchant ship Medea |
| March 26 | Stanley Cup: Vancouver Millionaires (PCHA) sweep Ottawa Senators |
| April 5 | French begin Woevre-offensive |
| April 5 | Jess Willard KOs Jack Johnson in 26 for heavyweight boxing title |
| April 14 | A's Herb Pennock is within 1 out of pitching 1st Opening Day no-hitter |
| April 14 | Dutch merchant Navy ship Katwijk sunk by Germany torpedo |
| April 15 | Manuel de Falla's ballet "El Amor Brujo," premieres in Madrid |
| April 15 | New York Giant Rube Marquard no-hits Bkln, 2-0 |
| April 19 | 19th Boston Marathon won by Edouard Fabre of Canada in 2:31:41.2 |
| April 22 | 1st military use of chlorine poison gas by Germany in WW I |
| April 22 | 2nd Battle of Ypres begins |
| April 22 | New York Yankees don pinstripes and hat-in-the-ring logo for 1st time |
| April 23 | ACA becomes National Advisory Council on Aeronautics (NACA) |
| April 24 | Massacre of Armenians by Turks starts (Armenian Martyrs Day) |
| April 24 | Pittsburghs' Frank Allen no-hits St. Louis (Federal League), 2-0 |
| April 25 | 78,000 ANZAC troops land at Gallipoli |
| April 26 | Italy secretly signes Pact of London with Britain, France and Russia |
| May 1 | British Lusitania leaves NY, for Liverpool |
| May 1 | German submarine sinks U.S. ship Gulflight |
| May 2 | Old Fordham Road in Bronx renamed Landing Road |
| May 4 | Italy drops Triple Alliance with Austria-Hungaryb and Germany |
| May 5 | German U-20 sinks Earl of Lathom |
| May 6 | Allies attack Cape Helles, Hellespont |
| May 6 | German U-20 sinks Centurion SE of Ireland |
| May 6 | Red Sox Babe Ruth pitching debut and 1st home run, loses to Yankees 4-3 in 15 |
| May 7 | Lusitania sunk by German submarine; 1198 lives lost |
| May 8 | 41st Kentucky Derby: Joe Notter aboard Regret wins in 2:05.4 |
| May 9 | German and French fight Battle of Artois |
| May 10 | Zeppelin drops hundred of bombs on Southend-on-Sea |
| May 12 | Croatians plunder Armenia, killing 250 |
| May 12 | Franklin K Mathiews, presents idea of "Book Week" |
| May 15 | Chicago Claude Hendrix no-hits Pittsburgh (Federal League), 10-0 |
| May 17 | 40th Preakness: Douglas Hoffman aboard Rhine Maiden wins in 1:58 |
| May 17 | Last liberal British government of Asquith falls |
| May 17 | National Baptist Convention chartered |
| May 20 | Bataafsche Petroleum Me begins oil extraction of Maracaibo |
| May 22 | Local train collides with troop train killing 226 (Gretna Scotland) |
| May 23 | Italy declares war on Austria-Hungary and Germany during WW I |
| May 24 | Italy declares war on Austria-Hungary |
| May 24 | Thomas Edison invents telescribe to record telephone conversations |
| May 25 | 2nd Battle of Ypres ends with 105,000 casualties |
| May 26 | H H Asquith forms a coalition government in England |
| May 28 | John B. Gruelle patents Raggedy Ann doll |
| May 31 | An LZ-38 Zeppelin makes an air raid on London |
| June 1 | 1st Zeppelin air raid over England |
| June 5 | 47th Belmont: George Byrne aboard The Finn wins in 2:18.6 |
| June 8 | 92 degrees F (33.3 degrees C) in De Bilt, Netherlands |
| June 8 | William Jennings Bryan quits as Secretary of State |
| June 10 | British and French troops conquer German colony of Cameroon |
| June 10 | Girl Scouts founded |
| June 12 | 29th U.S. Womens Tennis: Molla B Mallory beats Hazel Wightman (46 62 60) |
| June 15 | U.S. government mints 1st $50 gold pieces, for Panama Pacific Expo |
| June 17 | Cubs George "Zip" Zabel relieves with 2 outs in 1st and winds up with 4-3 19-inning win over Brooklyn in longest relief job ever |
| June 17 | League to Enforce Peace forms in Philadelphia |
| June 18 | 21st U.S. Golf Open: John Travers shoots a 297 at Baltusrol Golf Club New Jersey |
| June 20 | German offensive in Argonnes |
| June 21 | Anti-British revolt in South Africa ends with arrest of General De Law |
| June 22 | BMT, then Brooklyn Rapid Transit, begins subway service |
| June 23 | Yankees get record 16 walks and 3 wild pitches beat A's Bruno Hass, 15-0 |
| June 23 | Zeb Turner, country-rock performer (Chew Tobacco Rag) |
| June 24 | 800 dies as excursion steamer Eastland capsizes in Chicago |
| June 26 | Germany suppresses its "Vorwarts" newspaper after it called for peace |
| June 27 | 100 degrees F (38 degrees C), Fort Yukon Alaska (state record) |
| June 27 | Dutch SDAP demonstrates against conscription |
| July 1 | Australia begins Commonwealth Lighthouse Service |
| July 1 | Australian Survey Corps becomes part of Military Forces |
| July 3 | U.S. military forces occupy Haiti, remain until 1934 |
| July 9 | Germany surrenders South West Africa to Union of South Africa |
| July 10 | British/South African troops march into German SW-Africa |
| July 11 | Germany cruiser Konigsberg sinks off Dar-es-Salam |
| July 17 | Italian offensive at Isonzo |
| July 18 | 2nd Battle of Isonzo begins and ends with loss of 280,000 men |
| July 18 | Boston Braves start move from last place to become world series champs |
| July 19 | Dutch accidents at sea law enforced |
| July 19 | Washington Nationals steal record 8 bases vs. Cleveland Indians in the 1st inning |
| July 24 | Excursion ship Eastland capsizes in Lake Michigan, 852 die |
| July 26 | International School for Wijsbegeerte forms |
| July 28 | 10,000 blacks march on 5th Ave (New York City) protesting lynchings |
| July 28 | U.S. forces invade Haiti, stays until 1924 |
| July 29 | Pirate Honus Wagner at 41, hits a grand slam home run |
| August 5 | German troops over run Warsaw |
| August 5 | Warsaw, evacuated by the Russians, is occupied by Germans |
| August 7 | Assault up Russell's Top at Gallipolis, 232 Australians die |
| August 7 | St. Louis 3rd base coach Miller Huggins, calls for ball Brooklyn rookie obliges, Huggins steps aside, and Card runner scores |
| August 9 | British attack at Chanak Bair at Gallipolis |
| August 12 | "Of Human Bondage," by William Somerset Maugham, published |
| August 14 | British transport Royal Edward sank by German U boat kills 1000 |
| August 15 | Journalist Albert Siegfried Bettelheim, convicted of murder in Georgia |
| August 16 | KC's Alex Main no-hits Buffalo (Federal League), 5-0 |
| August 17 | German troops over run Kovno Lithuiana |
| August 17 | Hurricane strikes Galveston, Texas (275 killed) |
| August 17 | Mob lynches Jewish businessman Leo Frank in Cobb County, Georgia after death sentence for murder of 13-year-old girl commuted to life |
| August 18 | Braves Field opens in Boston to see Braves beat Cards 3-1 |
| August 19 | Rationing laws go into effect in Netherlands |
| August 20 | Italy declares war on Turkey |
| August 20 | White Sox obtain Joe Jackson from Cleveland in exchange for Robert Roth, Larry Chappell, Ed Klepfer, and $31,500 |
| August 23 | Czar Nicolaas II takes control of Russian Army |
| August 25 | Hurricane kills 275 in Galveston, Texas with $50 million damage |
| August 26 | German troops over run Brest-Litovsk, Russia |
| August 31 | Chicago White Sox Jimmy Lavender no-hits New York Giants, 2-0 |
| September 5 | 35th U.S. Mens Tennis: William Johnston beats McLoughlin (16 60 75 108) |
| September 5 | Anti-war conference in Zimmerwald, Switzerland |
| September 7 | 35th U.S. Mens Tennis: Wm Johnston beats M E McLoughlin (16 60 75 108) |
| September 7 | John Gruelle patents his Raggedy Ann doll |
| September 7 | St. Louis Dave Davenport no-hits Chicago (Federal League), 3-0 |
| September 15 | Boston Braves beat St. Louis Cardinals 20-1 |
| September 16 | Czar Nicolas II adjourns 4th Duma |
| September 16 | U.S. takes control of customs and finances of Haiti for 10 years |
| September 18 | Boston Braves trounce St. Louis Cardinals 20-1 |
| September 21 | CH Chubb buys Stonehenge for 6,600 pounds |
| September 21 | Emanuel Querido ("Kerido") begins publishing Querido |
| September 22 | Red Sox ask Braves for use of their larger park for World Series |
| September 22 | Southern Methodist University (Dallas Texas) holds its 1st class |
| September 22 | Xavier University, 1st Black Catholic College in U.S., opens in NO LA |
| September 25 | Battle at Loos: 8,246 British and 0 German casualties |
| September 28 | Battle of Kut-el-Amara: Brits defeat Turks in Mesopotamia |
| September 29 | 1st transcontinental radio telephone message is sent |
| September 29 | British army conquerors Chilly al Imara, Mesopotamie |
| September 29 | Dutch Opera's 1st performance |
| September 29 | Herbert/Blossoms musical "Princess Pat," premieres in New York City |
| September 29 | Hurricane claims 275 in Mississippi Delta |
| September 29 | Philadelphia Phillies clinch their 1st pennant |
| September 30 | Red Sox clinch AL pennant by beating Detroit |
| October 2 | 7.8 earthquake shakes Pleasant Valley Nevada |
| October 4 | Dinosaur National Monument in Colorado and Utah is established |
| October 8 | Battle of Loos, almost 430,000 French, British and Germans killed |
| October 8 | Phillies win their 1st and only World Series game before 1980, beating |
| October 8 | Red Sox, 3-1, with an 8th inning 2 run rally |
| October 9 | Belgrade Serbia, surrenders to Central leaders |
| October 9 | Gil Anderson races auto (165.1 km record) in Sheepshead Bay, New York |
| October 9 | Louis Kaufmans "Unchastened Woman," premieres in New York City |
| October 9 | Woodrow Wilson becomes 1st President to attend a World Series game |
| October 11 | Bulgarian anti Serbian offensive begins |
| October 12 | Ford Motor Company manufactures its 1 millionth Model T automobile |
| October 12 | Theodore Roosevelt criticizes U.S. citzens who identify themselves, with dual nationalities |
| October 13 | Boston Red Sox beat Philadelphia Phillies, 4 games to 1 in 12th World Series |
| October 16 | Great Britain declares war on Bulgaria |
| October 18 | 3rd Italians offensive at Isonzo |
| October 19 | Russia/Italy declares war on Bulgaria |
| October 21 | 1st transatlantic radiotelephone message, Arlington, Virginia to Paris |
| October 23 | 1st national horseshoe throwing championship (Kellerton, Iowa) |
| October 23 | 25,000 women march in New York City, demanding right to vote |
| October 25 | Atty James L. Curtis named minister of Liberia |
| October 28 | Richard Strauss' Alpensymfonie, premieres in Berlin |
| October 29 | Aristide Briand becomes premier of France |
| October 29 | Thomas Masaryk claims independence for Czechoslovakia |
| November 2 | 1st U.S. election by proportional representation, Ashtabula, Ohio |
| November 6 | 1st military flight in Netherlands East Indies (Tandjong Priok) |
| November 6 | Sophokles Skouloudis forms Greek government |
| November 7 | Austrian submarine torpedoes Italian passenger ship (272 killed) |
| November 9 | Italian liner Ancona sinks by German torpedos, killing 272 |
| November 12 | Britain annexes Gilbert and Ellice archipelago |
| November 12 | Theodore W. Richards is 1st American to win Nobel Prize in chemistry |
| November 14 | Thomas Masaryk demands independence for Czechoslovakia |
| November 20 | 7th CFL Grey Cup: Hamilton Tigers defeats Toronto Rowing, 13-7 |
| November 24 | Serbian leader flees to Albania |
| November 30 | St. John Ervine's "John Ferguson," premieres in Dublin |
| December 4 | F F Fletcher is 1st Admiral to receive Congressional Medal of Honor |
| December 4 | Ku Klux Klan receives charter from Fulton County Ga |
| December 4 | Panama Pacific International Exposition opens |
| December 8 | Jean Sibelius' 5th Symphony in E, premieres |
| December 10 | 1,000,000th model T Ford assembled |
| December 10 | President Woodrow Wilson marries Edith Galt |
| December 12 | 1st all-metal aircraft (Junkers J-1) test flown at Dessau Germany |
| December 12 | Aristide Briand forms French war government |
| December 12 | Russian troops overrun Hamadan, Persia |
| December 14 | Jack Johnson is 1st black world heavyweight boxing champion |
| December 16 | Albert Einstein publishes the General Theory of Relativity |
| December 18 | President Wilson, widowed the year before, marries Edith Bolling Galt |
| December 20 | Russian troops overrun Qom, Persia |
| December 21 | 10.17" (25.83 cm) of rainfall, Glenora, Oregon (state record) |
| December 22 | Federal Baseball League disolved |
| December 22 | Organized baseball and Federal League sign a peace treaty at Cincinnati |
| December 23 | J Kern/S Greene's musical "Very Good Eddie," premieres in New York City |
| December 25 | Irving Berlin and Harry B Smith's musical premieres in New York City |
| December 28 | SF City Hall dedicated by Mayor James Rolph |
| December 30 | Cromarty Harbour, Scot-British cruiser Natal explodes: 405 die |