Historical milestones occurring on October 5

October 5 marks several significant historical milestones across various eras and regions. In 610, Heraclius was proclaimed Emperor of the Byzantine Empire following the overthrow of Phocas. In 1912, Greece declared war on the Ottoman Empire, with the Greek Army entering Macedonia.

In 1582, the transition from the Julian to the Gregorian calendar occurred, resulting in the disappearance of the dates between October 5 and October 14. Other notable events include the 1864 cyclone in Calcutta, India, which caused 60,000 deaths, and the 1886 founding of Johannesburg, South Africa, following gold discoveries.

In the mid-20th century, 1955 saw King Paul of Greece appoint Konstantinos Karamanlis as Prime Minister following the death of Alexandros Papagos. Additionally, 1919 marked the racing debut of Enzo Ferrari, who would later found his namesake automotive company.