February 29, also known as leap day or leap year day, is a date added to most years that are divisible by 4, such as 2016, 2020, and 2024. A leap day is added in various solar calendars (calendars based on the Earth’s revolution around the Sun), including the Gregorian calendar standard in…
For superstitious reasons, when the Romans began to intercalate to bring their calendar into line with the solar year, they chose not to place their extra month of Mercedonius after February but within it. February 24 — known in the Roman calendar as “the sixth day before the…
February 23 in History 303 – Roman emperor Diocletian orders the destruction of the Christian church in Nicomedia, beginning eight years of Diocletianic Persecution. 532 – Byzantine emperor Justinian I orders the building of a new Orthodox Christian basilica in Constantinople – the Hagia Sophia. 1455 – Traditional date for the publication of the Gutenberg Bible, the first Western book printed…
February 21 in History 1245 – Thomas, the first known Bishop of Finland, is granted resignation after confessing to torture and forgery. 1440 – The Prussian Confederation is formed. 1613 – Mikhail I is unanimously elected Tsar by a national assembly, beginning the Romanov dynasty of Imperial Russia. 1797 – A force of 1,400 French soldiers invaded Britain at Fishguard in…