WHAT HAPPENED IN 1900.
Look what happened the 1900.

Philippine–American War: Filipinos under Juan Cailles defeat Americans under Colonel Benjamin F. Cheatham at Mabitac. (17. September 1900)

Max Planck, in his house at Grunewald, on the outskirts of Berlin, discovers the law of black body emission (Planck's law). (19. October 1900)

The United Kingdom annexes the Transvaal. (25. October 1900)

Battle of Leliefontein, a battle during which the Royal Canadian Dragoons win three Victoria Crosses. (7. November 1900)

Quantum mechanics: Max Planck presents a theoretical derivation of his black-body radiation law. (14. December 1900)

The Upper Ferntree Gully to Gembrook, Victoria Narrow-gauge (2 ft 6 in or 762 mm) Railway (now the Puffing Billy Railway) in Victoria, Australia is opened for traffic. (18. December 1900)

Hopetoun Blunder: The first Governor-General of Australia John Hope, 7th Earl of Hopetoun, appoints Sir William Lyne premier of the new state of New South Wales, but he is unable to persuade other colonial politicians to join his government and is forced to resign. (19. December 1900)

A relief crew arrives at the lighthouse on the Flannan Isles of Scotland, UK, only to find the previous crew has disappeared without a trace. (26. December 1900)