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…
February 27 in History 380 – Edict of Thessalonica: Emperor Theodosius I and his co-emperors Gratian and Valentinian II declare their wish that all Roman citizens convert to Nicene Christianity. 425 – The University of Constantinople is founded by Emperor Theodosius II at the urging of his wife Aelia Eudocia. 907 – Abaoji, a Khitan chieftain, is enthroned…
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 22 in History 705 – Empress Wu Zetian abdicates the throne, restoring the Tang dynasty. 1316 – The Battle of Picotin, between Ferdinand of Majorca and the forces of Matilda of Hainaut, ends in victory for Ferdinand. 1371 – Robert II becomes King of Scotland, beginning the Stuart dynasty. 1495 – King Charles VIII of France enters Naples to…
February 14 in History 748 – Abbasid Revolution: The Hashimi rebels under Abu Muslim Khorasani take Merv, capital of the Umayyad province Khorasan, marking the consolidation of the Abbasid revolt. 842 – Charles the Bald and Louis the German swear the Oaths of Strasbourg in the French and German languages. 1014 – Pope Benedict VIII crowns Henry of Bavaria, King of Germany and of Italy,…
February 13 in History 951 – Guo Wei, a court official, leads a military coup and declares himself emperor of the new Later Zhou. 962 – Emperor Otto I and Pope John XII co-sign the Diploma Ottonianum, recognizing John as ruler of Rome. 1322 – The central tower of Ely Cathedral falls on…
February 9 in History 474 – Zeno is crowned as co-emperor of the Byzantine Empire. 1003 – Boleslaus III is restored to authority with armed support from Bolesław I the Brave of Poland. 1555 – Bishop of Gloucester John Hooper is burned at the stake. 1621 – Gregory XV becomes Pope, the last Pope elected by acclamation. 1654 – The Capture of Fort Rocher takes…
February 8 in History 421 – Constantius III becomes co-Emperor of the Western Roman Empire. 1238 – The Mongols burn the Russian city of Vladimir. 1250 – Seventh Crusade: Crusaders engage Ayyubid forces in the Battle of Al Mansurah. 1347 – The Byzantine civil war of 1341–47 ends with a power-sharing agreement between John VI Kantakouzenos and John V…
January 31 in History 314 – Pope Sylvester I is consecrated, as a successor to the late Pope Miltiades. 1208 – The Battle of Lena takes place between King Sverker II of Sweden and his rival, Prince Eric, whose victory puts him on the throne…
January 26 in History 661 – The Rashidun Caliphate is effectively ended with the assassination of Ali, the last caliph. 945 – The co-emperors Stephen and Constantine are overthrown and forced to become monks by Constantine VII, who becomes the sole emperor of the…