WHAT ALL HAPPENED SEPTEMBER TO DECEMBER 1905
Find out what all happened September to December 1905

Irish nationalist Arthur Griffith founds Sinn Féin as a political party with the main aim of establishing a dual monarchy in Ireland. (28. November 1905)

Norway and Sweden sign the "Karlstad treaty", peacefully dissolving the Union between the two countries. (23. September 1905)

The Partition of Bengal in India takes place. (16. October 1905)

Prince Carl of Denmark becomes King Haakon VII of Norway. (18. November 1905)

Albert Einstein's paper, "Does the Inertia of a Body Depend Upon Its Energy Content?", is published in the journal Annalen der Physik. This paper reveals the relationship between energy and mass. This leads to the mass–energy equivalence formula E = mc². (21. November 1905)

Norway becomes independent from Sweden. (26. October 1905)

Norway holds a referendum in favor of monarchy over republic. (12. November 1905)

Alberta and Saskatchewan join the Canadian confederation. (1. September 1905)

Former Idaho Governor Frank Steunenberg is assassinated at the front gate of his home in Caldwell. (30. December 1905)

The Pushkin House is established in Saint Petersburg, Russia, to preserve the cultural heritage of Alexander Pushkin (15. December 1905)

František Pavlík is killed in a demonstration in Prague, inspiring Leoš Janáček to the piano composition 1. X. 1905. (1. October 1905)

A workers' uprising occurs in Kiev, Ukraine (then part of the Russian Empire), and establishes the Shuliavka Republic. (11. December 1905)

Prince Carl of Denmark arrives in Norway to become King Haakon VII of Norway. (25. November 1905)

The physics journal Annalen der Physik received Albert Einstein's paper "Does the Inertia of a Body Depend Upon Its Energy Content?", introducing the equation E=mc². (27. September 1905)

The October Manifesto issued by Tsar Nicholas II of Russia (17. October 1905)

In France, the law separating church and state is passed. (9. December 1905)

Wilbur Wright pilots Wright Flyer III in a flight of 24 miles in 39 minutes, a world record that stood until 1908. (5. October 1905)

Russo-Japanese War: In New Hampshire, United States, the Treaty of Portsmouth, mediated by U.S. President Theodore Roosevelt, ends the war. (5. September 1905)

Czar Nicholas II of Russia grants Russia's first constitution, creating a legislative assembly. (30. October 1905)