2nd January » Russo-Japanese War: The Russian garrison surrenders at Lüshunkou District named Port Arthur, China.
22nd January » Bloody Sunday (1905) e.g Bloody Sunday in Saint Petersburg, beginning of the 1905 revolution.
3rd March » Tsar Nicholas II of Russia agrees to create an elected assembly, the Duma.
4th April » In India, 1905 Kangra earthquake an earthquake hits the Kangra Valley, killing 20,000, and destroying most buildings in Kangra, Himachal Pradesh Kangra, Mcleodganj and Dharamsala, Himachal Pradesh Dharamshala.
17th April » The Supreme Court of the United States decides 'Lochner v. New York', which holds that the "Freedom of contract e.g right to free contract" is implicit in the Due process e.g due process clause of the Fourteenth Amendment of the United States Constitution
5th May » The trial in the Stratton Brothers case begins in London, England; it marks the first time that fingerprint evidence is used to gain a conviction for murder.
15th May » Las Vegas, is founded when convert 110 acre km2, in what later would become downtown, are auctioned off.
27th May » Russo-Japanese War: The Battle of Tsushima begins.
28th May » Russo-Japanese War: The Battle of Tsushima ends with the destruction of the Russian Baltic Fleet by Admiral Tōgō Heihachirō and the Imperial Japanese Navy.
15th June » Princess Margaret of Connaught marries Gustaf VI Adolf of Sweden e.g Gustaf, Crown Prince of Sweden.
27th June » Russian battleship Potemkin named Battleship 'Potemkin' uprising: sailors start a mutiny aboard the battleship 'Potemkin', denouncing the crimes of autocracy, demanding liberty and an end to war.
30th June » Albert Einstein publishes the article 'Annus Mirabilis Papers Special relativity called On the Electrodynamics of Moving Bodies', in which he introduces special relativity.
13th July » The verdict in the six-month long Smarthavicharam trial of Kuriyedath Thathri is pronounced, leading to the excommunication of 65 men of various castes.
10th August » Russo-Japanese War: peace negotiations begin in Portsmouth, New Hampshire.
1st September » Alberta and Saskatchewan join the Canadian confederation.
5th September » Russo-Japanese War: In New Hampshire, United States, the Treaty of Portsmouth, mediated by U.S. President Theodore Roosevelt, ends the war.
23rd September » Norway and Sweden sign the "Karlstad treaty", peacefully Dissolution of the union between Norway and Sweden in 1905 known as dissolving the Union between Sweden and Norway known as Union between the two countries.
1st October » František Pavlík is killed in a demonstration in Prague, inspiring Leoš Janáček to the piano composition 1. X. 1905.
5th October » Wilbur Wright pilots Wright Flyer III in a flight of 24 miles in 39 minutes, a world record that stood until 1908.
16th October » The Partition of Bengal (1905) or Partition of Bengal in India takes place.
17th October » The October Manifesto issued by Tsar Nicholas II of Russia
26th October » Norway becomes independent from Sweden.
12th November » Norway holds Norwegian monarchy plebiscite, 1905 e.g a referendum in favor of monarchy over republic.
18th November » Prince Carl of Denmark becomes King Haakon VII of Norway.
25th November » Prince Carl of Denmark arrives in Norway to become Haakon VII of Norway named King Haakon VII of Norway.
28th November » Irish nationalist Arthur Griffith founds History of Sinn Féin called Sinn Féin as a political party with the main aim of establishing a dual monarchy in Ireland.
9th December » In France, the 1905 French law on the Separation of the Churches and the State or law separating church and state is passed.
15th December » The Pushkin House is established in Saint Petersburg, Russia, to preserve the cultural heritage of Alexander Pushkin
30th December » Former Idaho Governor Frank Steunenberg is assassinated at the front gate of his home in Caldwell, Idaho named Caldwell.