September 22 marks several significant historical milestones. In 480 BC, the Greek fleet, led by Themistocles, defeated the Persian navy at the Battle of Salamis, an event observed by Xerxes from Mount Aigaleo.
Other notable historical events include the implementation of the French Revolutionary Calendar in 1792, the declaration of the Crimean War in 1853, and Bulgaria's declaration of independence from the Ottoman Empire in 1908. In 1915, Anglo-French Entente troops landed in Thessaloniki, impacting Greek neutrality during World War I.
Scientific and cultural milestones also occurred on this date, such as the 1994 announcement of the discovery of Ardipithecus ramidus in Ethiopia and the 1888 release of the first issue of National Geographic magazine.