Births on April 18

Sydney Halter, Canadian lawyer and businessman (d. 1990)

Gerald Sydney Halter, (April 18, 1905 – October 24, 1990) was a Canadian lawyer and the first commissioner of the Canadian Football League.

27 May

Battle of Tsushima
Russo-Japanese War: The Battle of Tsushima begins.
28 May

Battle of Tsushima
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.
26 Sep

Special theory of relativity
Albert Einstein publishes his first paper on the special theory of relativity.
26 Oct

Norway
Sweden accepts the independence of Norway.
30 Oct

Nicholas II of Russia
Czar Nicholas II of Russia issues the October Manifesto, granting the Russian peoples basic civil liberties and the right to form a duma. This was October 17 in the Julian calendar.