September 25
Overview
Holidays & Observances
Armed Forces DayorRevolution Day(Mozambique)
Armed Forces Day or Revolution Day in Mozambique honors the founding of the national armed forces and commemorates the revolutionary struggle that led to independence in 1975.
Bangladeshi Immigration Day(United States)
Bangladeshi Immigration Day in the United States honors the contributions and cultural heritage of Bangladeshi Americans.
Christianfeast day:
Abadir and Irajaand Companions (Coptic Church), Aunarius (Aunacharius), Anathalon(Archdiocese of Milan), Cadoc, Ceolfrith, Cleopas, Euphrosyne of Alexandria, Finbarr, Fermin of Amiens, Lancelot Andrewes(Church of England), Sergius of Radonezh(repose), Vincent Strambi, September 25 (Eastern Orthodox liturgics)
Various Christian traditions observe the feast days of multiple saints on September 25.
Day of National Recognition for the Harkis(France)
The Day of National Recognition for the Harkis in France honors Algerian Muslims who served France during the Algerian War.
National Research Administrators Day (United States)
National Research Administrators Day in the United States recognizes the professionals who manage and support scientific research.
National Youth Day(Nauru)
National Youth Day in Nauru celebrates and empowers young people through events focused on leadership and community engagement.
Abadir and Irajaand Companions (Coptic Church)
The Coptic Orthodox Church commemorates Saints Abadir and Iraja and their companions, martyrs who upheld their faith.
Aunarius (Aunacharius)
Saint Aunarius, a 7th-century bishop renowned for his charity and ecclesiastical reforms, is honored on September 25.
Anathalon(Archdiocese of Milan)
Saint Anathalon, regarded as the first bishop of Milan, is commemorated by the Archdiocese of Milan for his foundational role.
Events
For the last time, the Roman Senate chooses an emperor; they elect 75-year-old Marcus Claudius Tacitus.
In 275, after the death of Emperor Aurelian, the Roman Senate held its final vote to elect Marcus Claudius Tacitus as emperor.
Led by Muhammad al-Nafs al-Zakiyya, the Hasanid branch of the Alids begins the Alid Revolt against the Abbasid Caliphate.
In 762, Muhammad al-Nafs al-Zakiyya led the Hasanid Alids in a revolt against the ruling Abbasid Caliphate.
In the Battle of Stamford Bridge, Harald Hardrada, the invading King of Norway, is defeated by King Harold II of England.
In 1066, King Harold II of England defeated Harald Hardrada of Norway at the Battle of Stamford Bridge.
England and Scotland sign the Treaty of York, establishing the location of their common border.
In 1237, England and Scotland formalized their border with the signing of the Treaty of York.
Ottoman Emperor Bayezid I defeats a Christian army at the Battle of Nicopolis.
In 1396, Ottoman Sultan Bayezid I decisively defeated a Crusader army at the Battle of Nicopolis.
Spanish explorer Vasco Núñez de Balboa reaches what would become known as the Pacific Ocean.
In 1513, Spanish explorer Vasco Núñez de Balboa became the first European to sight the Pacific Ocean from the New World.
The Peace of Augsburg is signed by Emperor Charles V and the princes of the Schmalkaldic League.
In 1555, the Peace of Augsburg was signed, granting legal recognition to Lutheranism within the Holy Roman Empire.
Publick Occurrences Both Forreign and Domestick, the first newspaper to appear in the Americas, is published for the first and only time.
In 1690, the first newspaper in the Americas, Publick Occurrences Both Forreign and Domestick, was published for a single issue.
Unification of Nepal
In 1768, Prithvi Narayan Shah completed his conquest and unified Nepal under the Shah dynasty.
Births
Ashikaga Yoshimitsu
The third shōgun of the Ashikaga shogunate in Japan, credited with unifying the country and promoting culture during the Muromachi period.
Louis III of Anjou
A French prince of the House of Anjou who held the title Duke of Anjou and laid claim to the Kingdom of Naples.
Steven Borough
An English navigator who led pioneering expeditions toward the Northeast Passage to Asia.
Otto II
A German nobleman of the House of Welf who ruled as Duke of Brunswick-Harburg in the 16th century.
Günther XLI
A 16th-century German count of the House of Schwarzburg who governed the county of Arnstadt.
Francesco Borromini
A Swiss-Italian architect whose bold Baroque designs redefined the skyline of Rome.
Ferdinand Joseph
An Austrian nobleman who served as Prince of Dietrichstein and held key positions in the Habsburg court.
Ole Rømer
A Danish astronomer who produced the first quantitative estimate of the speed of light.
Johann Nikolaus Hanff
A German Baroque composer and organist known for his expressive chorale works.
Deaths
Harald Hardrada
A powerful Norwegian king from the Viking Age, remembered as one of history's last great Viking warriors. He led a bold invasion of England in 1066 and fell at the Battle of Stamford Bridge.
Maria Haraldsdotter
A Norwegian princess of the 11th century and daughter of King Harald Hardrada, believed to have died on the same day as her father during the 1066 invasion of England.
Tostig Godwinson
An English nobleman and Earl of Northumbria, brother to King Edward the Confessor. He allied with the Norwegian king Harald Hardrada and died at the Battle of Stamford Bridge in 1066.
William VIII
The Duke of Aquitaine from 1058 to 1086, celebrated for his patronage of Cluniac monastic reforms and cultural patronage in 11th-century France.
Simon I de Montfort
A French nobleman and the first Count of Montfort-l'Amaury, founder of the influential Montfort dynasty in medieval France.
Prince Morikuni
The eighth and final shōgun of Japan's Kamakura shogunate, presiding over its decline and fall in the early 14th century.
Jakushitsu Genkō
A Japanese Zen Buddhist monk, poet, and shakuhachi master, central to the cultural renaissance of the Muromachi period.
Jean de Carrouges
A French knight renowned for his role in the Hundred Years' War and his legendary judicial duel in 1386.
Jean de Vienne
A French admiral and military commander who modernized naval tactics during the Hundred Years' War.