# Historical milestones on September 27 > Live situation record from CLSTR: https://clstr.news/situations/historical-milestones-on-september-27 > Updated: 2026-09-26T21:01:00.000Z. Sources: 12. Developments: 3. September 27 is marked by various historical milestones in science, politics, and culture. In science, the date commemorates Albert Einstein’s 1905 formulation of the special theory of relativity and the equation E=mc2, which was published in the journal ‘Annalen der Physik’. In Greece, significant events include the 1831 assassination of Ioannis Kapodistrias, the first Governor of Greece, in Nafplio; the 1941 founding of the National Liberation Front (EAM) in Athens; and the 1918 liberation of Eastern Macedonia by the Greek Army. The 1669 Ottoman capture of Heraklion (Chandax) during the conquest of Crete is also noted. Other global occurrences include the 1821/1921 recognition of Mexican independence, the 1825 opening of the world’s first railway line in England, and the 1998 launch of the Google search engine. Additional milestones include the 1540 official approval of the Jesuit order by Pope Paul III, the 1930 founding of the General Confederation of Labour (CGT) in Argentina, the 1902 founding of Club Atlético Tucumán, and the 1939 surrender of Poland to Germany. ## Timeline ### 2026-09-26: Global history milestones observed on September 27 September 27 marks various global historical events, including Albert Einstein's 1905 theory of relativity, the 1831 assassination of Ioannis Kapodistrias, and the 1941 founding of Greece's National Liberation. 8 sources. https://clstr.news/cluster/historical-milestones-observed-on-september-27 ### 2026-09-26: Historical milestones observed on September 26 September 26 features major historical events, including Einstein's theory of relativity publication, Sheikh Mujibur Rahman's UN speech in Bengali, and the release of the Beatles' Abbey Road. 2 sources. https://clstr.news/cluster/historical-milestones-observed-on-september-26-1 ### 2026-09-25: Historical milestones observed on September 26 September 26 marks various historical events, including the 1687 partial destruction of the Parthenon, Albert Einstein's 1905 publication of special relativity, and the 1815 signing of the Holy Alliance. 3 sources. https://clstr.news/cluster/historical-milestones-observed-on-september-26 --- Cite as: Historical milestones on September 27. CLSTR, https://clstr.news/situations/historical-milestones-on-september-27