What happened on March 31

58 documented historical events happened on March 31, from antiquity to the present day. The best known is this: French abbot Bernard of Clairvaux preached a sermon to a crowd at a council in Vézelay, with King Louis VII in attendance, urging the necessity of a Second Crusade. On the same day, in another year: A conspiracy against Saladin, aiming to restore the Fatimid Caliphate, was revealed in Cairo. On Almanaccolo every event is listed in chronological order, grouped by century, and links to the Wikipedia article it comes from, so you can always read further or check the source. Alongside the events you find who was born and who died on this date, and which observances are celebrated around the world.

160 people with a Wikipedia article were born on March 31, including Gary Doer, Al Gore, Rhea Perlman. The list spans every era and every field — art, science, politics, sport, entertainment — ordered by year of birth, from the earliest to the most recent. The six featured people are those most has been written about: the ordering uses the length of their Wikipedia article as an indicator of prominence. For each one you find their occupation, year of birth and a link to the full biography.

132 people with a Wikipedia article died on March 31, including Abu Ja'far Ahmad ibn Muhammad, William of Modena, Francis I of France. The list is in chronological order by year of death and spans all of documented history, from antiquity to the present day. For each person you find their occupation, the year and a link to the Wikipedia biography, where the full story and its sources can be read.

15 observances are celebrated on March 31 around the world: Cesar Chavez Day (California, Washington (state)), Christian feast day Abdas of Susa, Christian feast day Acathius of Melitene (Eastern Orthodox Church), Christian feast day Anesius and companions, Christian feast day Benjamin, Christian feast day Balbina. The list gathers national holidays, international days and religious or civil observances falling on this date in different countries, as recorded on Wikipedia. Some are fixed and recur on the same day every year; others depend on the local calendar. Each links to the article explaining its origin and meaning.