January
January 1900
January 2 – U.S. Secretary of State John Hay announces the Open Door Policy to promote American trade with China.video
January 5
The Irish Nationalist leader John Redmond calls for a revolt against British rule.
Dr. Henry A. Rowland of Johns Hopkins University announces a theory about the cause of the Earth's magnetism.
January 6 – Second Boer War: Boers attack the town of Ladysmith, South Africa, killing over 1,000 people.
January 9 – S.S. Lazio, an Italian professional sports club, is founded in Rome.
January 14
Puccini's opera Tosca premieres in Rome, Italy.
The U.S. Senate accepts the British-German treaty of 1899, in which the United Kingdom renounced its claims to the American Samoa portion of the Samoan Islands.
Second Boer War: Boers at Spion Kop, 1900
January 24 – The Second Boer War: At the Battle of Spion Kop, Boer troops defeat the British Army.
Boxer Soldiers
January 27 – Boxer Rebellion: Foreign diplomats in Peking, Qing dynasty China, demand that the Boxer rebels be disciplined.
January 31 – Datu Muhammad Salleh, leader of the Mat Salleh Rebellion in North Borneo, is shot dead in Tambunan.
February
February 1900
February 5 – The United Kingdom and the United States sign a treaty for the building of a Central American shipping canal across Central America in Nicaragua.
February 6 – The international arbitration court at The Hague is created when the Netherlands' Senate ratifies an 1899 peace conference decree.
February 8 – Second Boer War: British troops are defeated by the Boers at Ladysmith.
February 14 – Second Boer War – Battle of Paardeberg: 20,000 British troops invade the Orange Free State.
February 15 – Second Boer War: The Siege of Kimberley is lifted.
February 17 – Second Boer War: Battle of Paardeberg: British troops defeat the Boers.
February 27
FC Bayern, Germany's most successful football club, is founded in Munich.
Second Boer War: British military leaders accept the unconditional notice of surrender from Boer General Piet Cronjé.
March
March 1900
March 5 – Two U.S. Navy cruisers are sent to Central America to protect American interests in a dispute between Nicaragua and Costa Rica.
March 6 – A coal mine explosion in West Virginia, U.S.A. kills 50 miners.
March 14 – Botanist Hugo de Vries rediscovers Mendel's Laws of Heredity.
March 15 – The Gold Standard Act is ratified, placing the United States currency on the gold standard.
March 16 – The British archaeologist Sir Arthur Evans purchases the land on Crete on which the ruins of the palace of Knossos stand. He begins to unearth some of the palace three days later.
March 27 – The arrival of a Russian naval fleet in Korea causes concern to the Imperial Japanese government.
April
Main article: April 1900
Exposition Universelle view in Paris
April 14 – The Paris World Exhibition opens.
April 22 – Battle of Kousséri: French forces secure their domination of Chad. Warlord Rabih az-Zubayr is defeated and killed.
May
May 1900
May 1 – An explosion of blasting powder in a coal mine in Scofield, Utah kills 200.
May 14 – The second Modern Olympic Games opens in Paris (as part of the Paris World Exhibition).
May 17
Second Boer War: The British Army relieves the Siege of Mafeking.
Boxer Rebellion: Boxers destroy three villages near Peking and kill sixty Chinese Christians.
L. Frank Baum's The Wonderful Wizard of Oz is published in Chicago, the first of Baum's Oz books chronicling the fictional Land of Oz for children.
May 18 – The United Kingdom proclaims a protectorate over Tonga.
May 21 – Russia invades Manchuria.
May 24 – Second Boer War: The British annex the Orange Free State as the Orange River Colony.
May 28 – Boxer Rebellion: The Boxers attack Belgians in the Fengtai railway station.
May 29 – N'Djamena, the capital city of Chad, is founded as Fort-Lamy by French commander Émile Gentil.
May 31 – Boxer Rebellion: Peacekeepers from various European countries arrive in China where they join with Japanese forces.
June
June 1900
June 1 – American temperance agitator Carrie Nation begins her crusade to demolish saloons.
June 5 – Second Boer War: British soldiers take Pretoria.
June 14 – The Reichstag approves a second law that allows the expansion of the Imperial German Navy
June 17 – Boxer Rebellion: Battle of Dagu Forts: Naval forces of the Eight-Nation Alliance capture the Taku Forts on the Hai River estuary in China.
June 20 – Boxer Rebellion: Boxers gather about 20,000 people near Peking and kill hundreds of European citizens, including the German ambassador.
June 25 – The Daoist monk Wang Yuanlu discovers the Dunhuang manuscripts in the Mogao Caves of Dunhuang, China.
June 30 – Hoboken Docks fire: A wharf fire at the docks in Hoboken, New Jersey, owned by the North German Lloyd Steamship line spreads to German passenger ships Saale, Main, and Bremen. The fire engulfs the adjacent piers and nearby ships, killing 326 people.
July
July 1900
July 2 – The first zeppelin flight is carried out over Lake Constance near Friedrichshafen, Germany.
July 12 – German cruise liner SS Deutschland breaks the record for the Blue Riband for the first time with an average speed of 22.4 knots (41.5 km/h).
July 23-25 – The First Pan-African Conference is held in London.
July 29 – King Umberto I of Italy is assassinated by the Italian-born anarchist Gaetano Bresci.
August
August 1900
August 4 – Elizabeth Angela Marguerite Bowes-Lyon, also known as The Queen Mother, was born in London
August 14 – Boxer Rebellion: An international contingent of troops, under British command, invades Peking and frees the Europeans taken hostage.
September
September 1900
September 8 – The 1900 Galveston hurricane kills about 8,000 people.
September 12 ; Admiral Fredrik von Otter becomes Prime Minister of Sweden.
September 13 – Philippine–American War: Filipino resistance fighters defeat a large American column in the Battle of Pulang Lupa.
September 17 – Philippine–American War: Filipinos under Juan Cailles defeat the Americans under Colonel Benjamin F. Cheatham at Mabitac.
October
October 1900
November
November 1900
November 29 – Herbert Kitchener succeeds Frederick Roberts as commander-in-chief of the British forces in South Africa and implements a scorched earth strategy.[1]
December
December 1900
December 7 – Max Planck announces his discovery of the law of black body emission, marking the birth of quantum physics.
December 27 – Emily Hobhouse arrives in Cape Town.
Date unknown
Australasian prospector Albert Fuller Ellis identifies phosphate deposits on the Pacific Islands of Nauru and Banaba Island (Ocean Island).
In New Haven, Connecticut, U.S., Louis Lassen of Louis' Lunch makes the first modern-day hamburger sandwich.
First Michelin Guide published in France.
Karl Landsteiner develops a system of blood grouping.
January 1900
January 2 – U.S. Secretary of State John Hay announces the Open Door Policy to promote American trade with China.video
January 5
The Irish Nationalist leader John Redmond calls for a revolt against British rule.
Dr. Henry A. Rowland of Johns Hopkins University announces a theory about the cause of the Earth's magnetism.
January 6 – Second Boer War: Boers attack the town of Ladysmith, South Africa, killing over 1,000 people.
January 9 – S.S. Lazio, an Italian professional sports club, is founded in Rome.
January 14
Puccini's opera Tosca premieres in Rome, Italy.
The U.S. Senate accepts the British-German treaty of 1899, in which the United Kingdom renounced its claims to the American Samoa portion of the Samoan Islands.
Second Boer War: Boers at Spion Kop, 1900
January 24 – The Second Boer War: At the Battle of Spion Kop, Boer troops defeat the British Army.
Boxer Soldiers
January 27 – Boxer Rebellion: Foreign diplomats in Peking, Qing dynasty China, demand that the Boxer rebels be disciplined.
January 31 – Datu Muhammad Salleh, leader of the Mat Salleh Rebellion in North Borneo, is shot dead in Tambunan.
February
February 1900
February 5 – The United Kingdom and the United States sign a treaty for the building of a Central American shipping canal across Central America in Nicaragua.
February 6 – The international arbitration court at The Hague is created when the Netherlands' Senate ratifies an 1899 peace conference decree.
February 8 – Second Boer War: British troops are defeated by the Boers at Ladysmith.
February 14 – Second Boer War – Battle of Paardeberg: 20,000 British troops invade the Orange Free State.
February 15 – Second Boer War: The Siege of Kimberley is lifted.
February 17 – Second Boer War: Battle of Paardeberg: British troops defeat the Boers.
February 27
FC Bayern, Germany's most successful football club, is founded in Munich.
Second Boer War: British military leaders accept the unconditional notice of surrender from Boer General Piet Cronjé.
March
March 1900
March 5 – Two U.S. Navy cruisers are sent to Central America to protect American interests in a dispute between Nicaragua and Costa Rica.
March 6 – A coal mine explosion in West Virginia, U.S.A. kills 50 miners.
March 14 – Botanist Hugo de Vries rediscovers Mendel's Laws of Heredity.
March 15 – The Gold Standard Act is ratified, placing the United States currency on the gold standard.
March 16 – The British archaeologist Sir Arthur Evans purchases the land on Crete on which the ruins of the palace of Knossos stand. He begins to unearth some of the palace three days later.
March 27 – The arrival of a Russian naval fleet in Korea causes concern to the Imperial Japanese government.
April
Main article: April 1900
Exposition Universelle view in Paris
April 14 – The Paris World Exhibition opens.
April 22 – Battle of Kousséri: French forces secure their domination of Chad. Warlord Rabih az-Zubayr is defeated and killed.
May
May 1900
May 1 – An explosion of blasting powder in a coal mine in Scofield, Utah kills 200.
May 14 – The second Modern Olympic Games opens in Paris (as part of the Paris World Exhibition).
May 17
Second Boer War: The British Army relieves the Siege of Mafeking.
Boxer Rebellion: Boxers destroy three villages near Peking and kill sixty Chinese Christians.
L. Frank Baum's The Wonderful Wizard of Oz is published in Chicago, the first of Baum's Oz books chronicling the fictional Land of Oz for children.
May 18 – The United Kingdom proclaims a protectorate over Tonga.
May 21 – Russia invades Manchuria.
May 24 – Second Boer War: The British annex the Orange Free State as the Orange River Colony.
May 28 – Boxer Rebellion: The Boxers attack Belgians in the Fengtai railway station.
May 29 – N'Djamena, the capital city of Chad, is founded as Fort-Lamy by French commander Émile Gentil.
May 31 – Boxer Rebellion: Peacekeepers from various European countries arrive in China where they join with Japanese forces.
June
June 1900
June 1 – American temperance agitator Carrie Nation begins her crusade to demolish saloons.
June 5 – Second Boer War: British soldiers take Pretoria.
June 14 – The Reichstag approves a second law that allows the expansion of the Imperial German Navy
June 17 – Boxer Rebellion: Battle of Dagu Forts: Naval forces of the Eight-Nation Alliance capture the Taku Forts on the Hai River estuary in China.
June 20 – Boxer Rebellion: Boxers gather about 20,000 people near Peking and kill hundreds of European citizens, including the German ambassador.
June 25 – The Daoist monk Wang Yuanlu discovers the Dunhuang manuscripts in the Mogao Caves of Dunhuang, China.
June 30 – Hoboken Docks fire: A wharf fire at the docks in Hoboken, New Jersey, owned by the North German Lloyd Steamship line spreads to German passenger ships Saale, Main, and Bremen. The fire engulfs the adjacent piers and nearby ships, killing 326 people.
July
July 1900
July 2 – The first zeppelin flight is carried out over Lake Constance near Friedrichshafen, Germany.
July 12 – German cruise liner SS Deutschland breaks the record for the Blue Riband for the first time with an average speed of 22.4 knots (41.5 km/h).
July 23-25 – The First Pan-African Conference is held in London.
July 29 – King Umberto I of Italy is assassinated by the Italian-born anarchist Gaetano Bresci.
August
August 1900
August 4 – Elizabeth Angela Marguerite Bowes-Lyon, also known as The Queen Mother, was born in London
August 14 – Boxer Rebellion: An international contingent of troops, under British command, invades Peking and frees the Europeans taken hostage.
September
September 1900
September 8 – The 1900 Galveston hurricane kills about 8,000 people.
September 12 ; Admiral Fredrik von Otter becomes Prime Minister of Sweden.
September 13 – Philippine–American War: Filipino resistance fighters defeat a large American column in the Battle of Pulang Lupa.
September 17 – Philippine–American War: Filipinos under Juan Cailles defeat the Americans under Colonel Benjamin F. Cheatham at Mabitac.
October
October 1900
November
November 1900
November 29 – Herbert Kitchener succeeds Frederick Roberts as commander-in-chief of the British forces in South Africa and implements a scorched earth strategy.[1]
December
December 1900
December 7 – Max Planck announces his discovery of the law of black body emission, marking the birth of quantum physics.
December 27 – Emily Hobhouse arrives in Cape Town.
Date unknown
Australasian prospector Albert Fuller Ellis identifies phosphate deposits on the Pacific Islands of Nauru and Banaba Island (Ocean Island).
In New Haven, Connecticut, U.S., Louis Lassen of Louis' Lunch makes the first modern-day hamburger sandwich.
First Michelin Guide published in France.
Karl Landsteiner develops a system of blood grouping.