Major Events of September 1905: Key Historical Moments from the Month
Each month is marked by defining moments that shape the course of history. Whether through political shifts, cultural movements, or world-changing events, these periods leave a lasting impression. Dive into the most important events from September 1905 and discover how they influenced the world both then and now.

Major Events of September 1905: Key Historical Moments from the Month
- 05 Sep 1905 Treaty of Portsmouth ends Russo-Japanese War: The Treaty of Portsmouth was signed on September 5, 1905, formally ending the Russo-Japanese War. Negotiated in Portsmouth, New Hampshire, the treaty recognized Japan's dominance in Korea and ceded territories to Japan, including the southern half of Sakhalin Island. U.S. President Theodore Roosevelt mediated the negotiations and was awarded the Nobel Peace Prize for his efforts. source: britannica.com
- 11 Sep 1905 Ninth Avenue Elevated Train Derailment: On September 11, 1905, a train on the Ninth Avenue Elevated in Manhattan derailed after being mistakenly switched onto a sharp curve. The train was traveling at 30 mph when it entered the curve, exceeding the 9 mph speed limit. The second car fell to the street, resulting in 13 deaths and 48 serious injuries. source: en.wikipedia.org
- 16 Sep 1905 Sweden-Norway Union Dissolution Announcement: On September 16, 1905, the Swedish Riksdag confirmed the dissolution of the union with Norway, following Norway's declaration of independence on June 7, 1905. source: history.state.gov
- 24 Sep 1905 Birth of Severo Ochoa, pioneering biochemist: Severo Ochoa de Albornoz was born on September 24, 1905, in Luarca, Asturias, Spain. He was a Spanish-American biochemist and molecular biologist who received the Nobel Prize in Physiology or Medicine in 1959 for his work on the mechanisms in the biological synthesis of RNA and DNA. source: en.wikipedia.org
- 25 Sep 1905 Death of Jacques Cavaignac: Jacques Marie Eugène Godefroy Cavaignac, a French politician and former Minister of War, died on September 25, 1905, at his country home near Flée, Sarthe, France, at the age of 52. source: en.wikipedia.org
- 30 Sep 1905 Victorian Football League Championship Game: The 1905 VFL Grand Final was held at the Melbourne Cricket Ground, where Fitzroy Football Club defeated Collingwood Football Club by 13 points, marking Fitzroy's fourth premiership victory and second consecutive win. source: en.wikipedia.org