September 18
Overview
Holidays & Observances
Christianfeast day:
Constantius (Theban Legion), Edward Bouverie Pusey(Episcopal Church), Eustorgius I, Joseph of Cupertino, Juan Macias, Methodius of Olympus, Richardis, September 18 (Eastern Orthodox liturgics)
A day in the Eastern Orthodox liturgical calendar honoring various saints, theologians, and martyrs on September 18.
Day of National Music(Azerbaijan)
Island Language Day(Okinawa Prefecture,Japan)
National DayorDieciocho(Chile)
Chile’s Fiestas Patrias, known as Dieciocho, mark the country’s Independence Day with vibrant celebrations across the nation.
National HIV/AIDS and Aging Awareness Day(United States)
A day dedicated to raising awareness about the unique challenges faced by older adults living with HIV/AIDS in the United States.
Navy Day(Croatia)
Croatia observes Navy Day each year to honor the service and history of its naval forces.
World Water Monitoring Day
An international event encouraging citizens to test and report on the health of their local water bodies.
Constantius (Theban Legion)
Feast day of Saint Constantius, a member of the legendary Theban Legion martyred for his Christian faith.
Edward Bouverie Pusey(Episcopal Church)
Commemoration of Edward Bouverie Pusey, influential 19th-century Anglican theologian and leader of the Oxford Movement.
Events
Emperor Domitian is assassinated as a result of a plot by his wife Domitia and two Praetorian prefects. Nerva is then proclaimed as his successor.
Domitian is murdered in a palace coup led by his wife and Praetorian prefects. His assassination paves the way for Nerva to become the new emperor.
Constantine the Great decisively defeats Licinius in the Battle of Chrysopolis, establishing Constantine's sole control over the Roman Empire.
Constantine the Great wins a decisive victory at the Battle of Chrysopolis. This triumph secures his position as sole ruler of the Roman Empire.
Battle of Kapetron between a combined Byzantine-Georgian army and a Seljuq army.
A coalition of Byzantine and Georgian forces confronts the Seljuq army at Kapetron. This clash highlights the growing Seljuq threat on the empire's eastern frontier.
Norwegian king Harald Hardrada lands with Tostig Godwinson at the mouth of the Humber River and begins his invasion of England.
Norwegian King Harald Hardrada and Tostig Godwinson land at the Humber River to launch their English invasion. Their arrival marks the start of one of 1066’s pivotal campaigns.
Philip Augustus becomes king of France at the age of fifteen.
Philip Augustus ascends to the French throne at just fifteen, beginning a reign dedicated to strengthening royal authority.
Thirteen Years' War: In the Battle of Chojnice, the Polish army is defeated by the Teutonic knights.
The Teutonic Knights ambush and rout the Polish forces at Chojnice during the Thirteen Years’ War. This defeat stalls Poland’s initial campaign against the Order.
The expedition of Juan Bautista Pastene makes landfall in San Pedro Bay, southern Chile, claiming the territory for Spain.
Spanish navigator Juan Bautista Pastene lands in San Pedro Bay, southern Chile, and claims the region for Spain. His expedition expands Spain’s reach in the New World.
The twelfth baktun in the Mesoamerican Long Count calendar begins.
A new baktun cycle in the Mesoamerican Long Count calendar begins, marking a significant chronological milestone.
George I arrives in Great Britain after becoming king on August 1.
George I lands in Great Britain as the first Hanoverian monarch, arriving to assume his royal duties. His arrival initiates a new chapter in British constitutional governance.
Births
Trajan
Trajan was Roman emperor from 98 to 117 AD, known as one of the 'Five Good Emperors' and for expanding the empire to its greatest extent.
Kan Bahlam I
Kan Bahlam I was an early Maya ruler of Palenque who governed during the 6th century and laid foundations for the city's future prominence.
Andronikos Komnenos
Andronikos Komnenos was a Byzantine prince of the Komnenos dynasty and a respected military commander in the early 12th century.
Marie of France
Marie of France was Duchess of Bar in the 14th century, daughter of King John II of France and a notable medieval patron of culture.
Eleanor of Portugal
Eleanor of Portugal was Holy Roman Empress as the wife of Emperor Frederick III and a key figure in 15th-century European politics.
Henry Stafford
Henry Stafford, 1st Baron Stafford, was an English nobleman and landowner during the Tudor period.
Haydar Mirza Safavi
Haydar Mirza Safavi was a Safavid prince and contender in the succession struggles of 16th-century Persia.
Francesca Caccini
Francesca Caccini was an Italian composer, singer, and lutenist, recognized as one of the earliest female opera composers.
Zhang Xianzhong
Zhang Xianzhong was a Chinese rebel leader during the late Ming dynasty who established a short-lived regime in Sichuan.
Deaths
Domitian
Roman emperor from 81 to 96 AD, known for his autocratic rule and grand building projects.
Constantine III
Roman general who declared himself Western Roman Emperor from 407 to 411 AD.
Wenilo
Frankish archbishop active in the 9th century under the Carolingian dynasty.
Pietro I Candiano
Eighth Doge of Venice, remembered for his efforts to protect Venetian trade routes.
Zhang Xiong
Chinese warlord active during the late Tang dynasty’s period of fragmentation.
Liu Sheng
Fourth emperor of the Southern Han kingdom, ruling from 943 to 958 AD.
Eric II
Danish king known as Eric Emune, who reclaimed the throne amid civil conflict.
Louis VII
King of France from 1137 to 1180, noted for his role in the Second Crusade and his marriage to Eleanor of Aquitaine.
Konrad von Hochstaden
Archbishop of Cologne and prince-elector in the Holy Roman Empire during the mid-13th century.