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
- 01 Sep 1905 Russo-Japanese War Peace Conference: Representatives of Russia and Japan reached a critical diplomatic breakthrough by agreeing to a ceasefire during the peace conference held in Portsmouth, New Hampshire. This agreement signaled the potential end of the Russo-Japanese War, a significant conflict in early 20th-century geopolitics.
- 02 Sep 1905 France Issues Diplomatic Ultimatum to Morocco: In a significant diplomatic incident, France delivered a formal ultimatum to the Sultan of Morocco, demanding an official apology and financial compensation. The ultimatum was triggered by the August 22 arrest of a French Algerian merchant, which France viewed as a direct affront to its colonial interests and diplomatic standing. This event was part of the broader tensions surrounding European colonial powers' interactions with Morocco during the early 20th century.
- 03 Sep 1905 Uneventful Day in 1905: While no specific major historical events were recorded for September 3, 1905, this date falls within an interesting period of global transformation. The early 20th century was marked by significant technological, political, and social changes, including the aftermath of the Russo-Japanese War and the early stages of modernization across many world regions.
- 05 Sep 1905 Treaty of Portsmouth Ends Russo-Japanese War: The Treaty of Portsmouth was signed by representatives of the Empire of Japan and the Russian Empire to end the Russo-Japanese War, following mediation by U.S. President Theodore Roosevelt in Portsmouth, New Hampshire. As part of the peace agreement, Russia ceded half of the island of Sakhalin to Japan, along with seaport and railway rights in Manchuria.
- 06 Sep 1905 Atlanta Life Insurance Company Founded: The Atlanta Life Insurance Company was established, representing an important moment in African American business history and financial entrepreneurship during the early Jim Crow era.
- 07 Sep 1905 First Recorded Bird Strike in Aviation History: On September 7, 1905, Orville Wright experienced the first documented bird strike in aviation history while piloting the Wright Flyer over a cornfield near Kitty Hawk, North Carolina. This incident marked an early challenge in the emerging field of aviation, highlighting the potential risks of wildlife interactions with aircraft during flight. The event occurred during the Wright brothers' pioneering period of experimental aircraft development, just two years after their historic first powered flight in 1903.
- 08 Sep 1905 Devastating Calabria Earthquake of 1905: On September 8, 1905, a massive 7.2 magnitude earthquake struck southern Italy, causing widespread destruction in the Calabria region. The earthquake was rated at an extreme Mercalli intensity level of XI, indicating catastrophic damage. The seismic event resulted in significant loss of life, with estimates ranging between 557 and 2,500 fatalities. The quake destroyed 18 villages surrounding the city of Calabria, leaving a trail of devastation and human suffering.
- 09 Sep 1905 Treaty of Portsmouth Ends Russo-Japanese War: The Treaty of Portsmouth was signed by representatives of the Empire of Japan and the Russian Empire, effectively concluding the Russo-Japanese War. U.S. President Theodore Roosevelt played a crucial role in mediating the peace negotiations, which were held in Portsmouth, New Hampshire. As part of the treaty's terms, Russia was compelled to cede the southern half of Sakhalin Island to Japan and relinquish its railway and seaport rights in Manchuria. This diplomatic agreement marked a significant moment in early 20th-century geopolitics, demonstrating Japan's emerging power and Russia's declining imperial influence.
- 10 Sep 1905 Tragic Explosion of Japanese Battleship Mikasa: On September 10, 1905, a catastrophic arsenal explosion occurred aboard the Imperial Japanese Navy's flagship Mikasa, resulting in the devastating loss of 251 officers and sailors. The incident took place shortly after the ship's pivotal role in the Russo-Japanese War, where it had been instrumental in Admiral Togo Heihachiro's naval victories. The explosion not only represented a significant human tragedy but also highlighted the inherent risks of naval warfare and maritime technology in the early 20th century.
- 11 Sep 1905 Ninth Avenue Elevated Train Derailment: A catastrophic train accident occurred on the Ninth Avenue Elevated Railway in New York City, resulting in a tragic derailment that killed 13 passengers and injured over 40 others. The accident was caused by a critical switch misalignment, which led to the train car falling from the elevated tracks onto the street below, causing significant loss of life and highlighting the safety challenges of early 20th-century urban transportation infrastructure.
- 12 Sep 1905 Zambezi River Railway Bridge Opened: The railway bridge over the Zambezi River was formally opened in southern Africa, significantly reducing travel time for trains on the ambitious Capetown to Cairo Railway project. This engineering feat represented a crucial milestone in connecting transportation networks across colonial Africa.
- 13 Sep 1905 Russian Imperial Army Suppresses Finnish Delegates: In a dramatic display of imperial control, Russian Imperial Army troops violently disrupted a gathering of 800 Finnish delegates in Helsinki. Using bayonets, the troops forcibly broke up the meeting, which was focused on discussing Finnish independence. This event highlighted the tensions between the Finnish Grand Duchy and the Russian Empire, symbolizing the struggle for national autonomy.
- 14 Sep 1905 Death of Pierre Savorgnan de Brazza: Pierre Savorgnan de Brazza, the renowned 53-year-old Italian-born French explorer who played a crucial role in French colonial expansion in Africa, died from a tropical illness contracted during his extraordinary diplomatic mission. He is famously known as the namesake of Brazzaville, the capital of the Republic of Congo.
- 15 Sep 1905 Uneventful Day in 1905: While no major historical events were recorded on September 15, 1905, this does not diminish the broader historical context of the early 20th century. This period was marked by significant global transformations, including technological innovations, geopolitical shifts, and social changes that would shape the modern world.
- 16 Sep 1905 Sweden-Norway Union Dissolution Announcement: At Karlstad, Swedish and Norwegian commissioners issued a joint public announcement to reassure citizens that peaceful separation of their union would proceed without military conflict. This marked a critical diplomatic moment in resolving potential tensions during the dissolution of the Sweden-Norway political union.
- 18 Sep 1905 Political Transition in Manila's Governance: Arsenio Cruz Herrera, Manila's first mayor, resigned from his position due to persistent conflicts with the U.S. Governor-General, reflecting the complex political dynamics during the American colonial period in the Philippines.
- 20 Sep 1905 Houdini's Underwater Escape Challenge: On September 20, 1905, legendary escape artist Harry Houdini participated in a dramatic underwater escape challenge with a challenger named 'Jacques Boudini' at Battery Park in New York City. Both men were handcuffed, chained, and leg-ironed before jumping from a tugboat into the Hudson River. Houdini demonstrated his extraordinary skills by escaping his handcuffs in just 70 seconds and freeing his feet within 90 seconds, while his challenger struggled and required rescue.
- 21 Sep 1905 Russia Lifts Public Meeting Ban: The Russian government announced the lifting of the ban on public meetings, a significant political development aimed at facilitating campaigning for elections to the Duma. This decision represented an important, albeit limited, step towards political liberalization during the tumultuous period preceding the Russian Revolution.
- 22 Sep 1905 Atlanta Race Riot of 1905: A devastating race riot erupts in Atlanta, Georgia, resulting in the tragic deaths of 10 African Americans and two white individuals. This violent incident highlights the deep racial tensions and systemic racism prevalent in the early 20th-century American South.
- 23 Sep 1905 Norway and Sweden Peacefully Dissolve Union: On September 23, 1905, Norway and Sweden signed the Karlstad Treaty, which officially and peacefully ended their political union. This diplomatic resolution marked a significant moment in Scandinavian history, allowing Norway to establish itself as a fully independent sovereign nation without armed conflict.
- 24 Sep 1905 Birth of Severo Ochoa, Pioneering Biochemist: Severo Ochoa was born in Luarca, Spain, who would later become a renowned biochemist and molecular biologist. He was awarded the Nobel Prize in Physiology or Medicine in 1959 for his groundbreaking work on the mechanisms of genetic coding and RNA synthesis. Ochoa's research significantly advanced our understanding of cellular biochemistry and genetic processes, making fundamental contributions to molecular biology.
- 25 Sep 1905 Political Congress in Moscow: A significant political congress with 300 delegates from across the Russian Empire convened in a private house in Moscow, with government approval, signaling a period of political dialogue and potential reform.
- 26 Sep 1905 Einstein's Special Theory of Relativity Introduced: On September 26, 1905, Albert Einstein published his groundbreaking third paper in the Annals of Physics, presenting the special theory of relativity. This revolutionary scientific work fundamentally transformed our understanding of space, time, and the relationship between energy and matter. The paper challenged classical Newtonian physics by proposing that the speed of light is constant and that time and space are not absolute but relative, depending on the observer's frame of reference.
- 27 Sep 1905 Einstein's Revolutionary Physics Paper: Albert Einstein published a groundbreaking scientific paper in Annalen der Physik titled 'Does the Inertia of a Body Depend Upon Its Energy Content?', which introduced the fundamental relationship between energy and mass, laying the groundwork for his famous E=mc² equation.
- 28 Sep 1905 Suez Canal Blockage Cleared by Explosive Removal: On September 28, 1905, a significant maritime engineering challenge was resolved when the sunken steamship Chatham, which was blocking the critical Suez Canal, was strategically cleared using an explosive method. The operation involved detonating approximately 90 tons of dynamite to remove the vessel, thereby restoring maritime traffic through this crucial international shipping route connecting the Mediterranean Sea to the Red Sea.
- 29 Sep 1905 Uneventful Day in History: While no major global events were recorded on September 29, 1905, this date falls within an important period of scientific and technological advancement. Albert Einstein had recently published his groundbreaking Special Theory of Relativity earlier that same year, which was transforming scientific understanding of space, time, and physics.
- 30 Sep 1905 Victorian Football League Championship Game: The Victorian Football League (VFL) held its annual championship game, drawing an impressive crowd of 28,000 spectators. This match represented the pinnacle of Australian rules football competition for the season, showcasing the top teams and their athletic prowess in a highly anticipated sporting event.