Explore 1773 historical events from 0–9.
Flavia Julia Helena, also known as Helena of Constantinople and in Christianity as Saint Helena, was a Greek Augusta of the Roman Empire and mother of Emperor Constantine the Great…
Christian feast day: Helena of Constantinople, also known as "Feast of the Holy Great Sovereigns Constantine and Helen,
John Eliot was a Puritan missionary to Native Americans who some called "the apostle to the Indians", and the founder of Roxbury Latin School in the Massachusetts Bay Colony in 164…
Christian feast day: John Elliot (Episcopal Church)
On May 21, 2000, Pope John Paul II canonized a group of 25 saints and martyrs who had died in the Mexican Cristero War. The vast majority are Catholic priests who were executed for…
Christian feast day: Saints of the Cristero War, including Christopher Magallanes
May 20 - Eastern Orthodox Church calendar - May 22
Christian feast day: May 21 (Eastern Orthodox liturgics)
The Circassian Day of Mourning is observed by the Circassian diaspora every year on 21 May to commemorate all those who were killed in and displaced by the Circassian genocide, whi…
Circassian Day of Mourning (Circassians)
An Armed Forces Day, alongside its branch-specific variants often referred to as Army or Soldier's Day, Navy or Sailor's Day, and Air Force or Aviator's Day, is a holiday dedicated…
Day of Patriots and Military (Hungary)
Independence Day is observed in Montenegro on 21 May to commemorate the passage of the 2006 Montenegrin independence referendum, marking Montenegro's independence from Serbia and M…
Independence Day, celebrates the Montenegrin independence referendum in 2006, celebrated until the next day
International Tea Day is observed annually on May 21, according to the United Nations. Chinese scholar Chen Entian is the earliest initiator and promoter. The concerning resolution…
International Tea Day (International)
Day of Naval Glories is a Chilean national holiday celebrated on May 21 each year. The day was selected to commemorate the Battle of Iquique, which occurred on May 21, 1879, during…
Navy Day (Chile)
This is a list of public holidays in Saint Helena, Ascension and Tristan da Cunha, a British overseas territory in the South Atlantic Ocean consisting of Saint Helena, Ascension I…
Saint Helena Day, celebrates the discovery of Saint Helena in 1502
The World Day for Cultural Diversity for Dialogue and Development, sometimes abbreviated World Day for Cultural Diversity, is a United Nations sanctioned observance day for the pro…
World Day for Cultural Diversity for Dialogue and Development (International)
Abolitionism, or the abolitionist movement, is the political movement to end slavery and liberate enslaved individuals around the world. It gained momentum in the western world in …
Abolition Day (Martinique)
The Aromanian National Day is the national day of the Aromanians, an ethnic group of the Balkans scattered in Albania, Bulgaria, Greece, North Macedonia, Romania and Serbia. It is …
Aromanian National Day (marginal, celebration on May 23 is more common)
Saints Castus and Emilius are venerated as saints and martyrs by the Eastern Orthodox and Roman Catholic Churches.
Christian feast day: Castus and Emilius
Saint Fulk was an English pilgrim who was beatified for his selfless assistance of plague victims even when this was a risk to himself. He was travelling to Rome sometime in the 12…
Christian feast day: Fulk
Saint Humility, known as Saint Roxanne was the founder of the Vallumbrosan Nuns.
Christian feast day: Humilita
Beatification is a recognition accorded by the Catholic Church of a deceased person's entrance into Heaven and capacity to intercede on behalf of individuals who pray in their name…
Christian feast day: Blessed John Forest
Beatification is a recognition accorded by the Catholic Church of a deceased person's entrance into Heaven and capacity to intercede on behalf of individuals who pray in their name…
Christian feast day: Blessed Maria Domenica Brun Barbantini
Michael Hồ Đình Hy was a Vietnamese mandarin official who was martyred for his Roman Catholic belief during the persecutions by Emperor Tự Đức. He was canonized in 1988 along with …
Christian feast day: Michael Hồ Đình Hy (one of Vietnamese Martyrs)
Quiteria was a fifth-century saint and virgin martyr about whom little is certain except her name, the date, place, and cause of her death, and existence of her cult. She is listed…
Christian feast day: Quiteria
Rita of Cascia, OSA, was an Italian Catholic widow and Augustinian nun. After Rita's husband died, she joined a small community of nuns who later became Augustinians. Therein, she …
Christian feast day: Rita of Cascia
Saint Romanus of Subiaco was a hermit in the area around Subiaco, Italy.
Christian feast day: Romanus of Subiaco
May 21 - Eastern Orthodox Church calendar - May 23
Christian feast day: May 22 (Eastern Orthodox liturgics)
Harvey Milk Day is organized by the Harvey Milk Foundation and celebrated each year on May 22, especially in California, in memory of Harvey Milk, a gay rights activist who was ass…
Harvey Milk Day (California)