May 31

Holidays

58 holidays recorded on May 31 throughout history

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Quote of the Day

“Do I contradict myself? Very well, then I contradict myself, I am large, I contain multitudes.”

— Walt Whitman

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Antiquity 11

The patron saint of Discordianism who never existed created a philosophy that did.

The patron saint of Discordianism who never existed created a philosophy that did. Sri Syadasti—whose name roughly translates to "maybe it is so"—appears in the Principia Discordia as one of five apostles who brought chaos worship to humanity. His feast day falls on Confusion 5 in the Discordian calendar, which might be January 5. Or not. Discordians celebrate by embracing paradox and contradiction, since Syadasti taught that all things are true, including their opposites. The fictional apostle inspired real followers to question every certainty. Including his own existence.

She probably never existed, but that didn't stop medieval Romans from digging up a random skeleton in the catacombs a…

She probably never existed, but that didn't stop medieval Romans from digging up a random skeleton in the catacombs and declaring it hers. The story went that she was Peter's daughter—granddaughter, maybe—who refused marriage to stay Christian. Convenient martyrdom followed. By the 8th century, Frankish kings were building churches in her name. Her skull ended up in a golden reliquary. Pilgrims lined up for centuries to touch the bones of a woman whose entire biography might've been invented by a scribe having a slow Tuesday. Faith doesn't always need facts.

Argentina decided to split atoms before it had reliable electricity in half its provinces.

Argentina decided to split atoms before it had reliable electricity in half its provinces. On May 31, 1950, President Perón created the CNEA—Comisión Nacional de Energía Atómica—putting physicist José Balseiro in charge of building reactors while rural families still cooked over wood fires. Within a decade, Argentina was exporting nuclear technology to other developing nations, running South America's first research reactor. The country that couldn't keep the lights on in Jujuy was teaching Brazil about uranium enrichment. Sometimes you leapfrog straight over the problems you can't solve.

The region didn't exist until 1982.

The region didn't exist until 1982. For centuries, Castilla-La Mancha was just administrative pieces—New Castile here, a chunk of Murcia there, bits of Albacete scattered around. Franco's government had carved Spain into fifty provinces that made sense to nobody who actually lived there. When democracy returned, locals pushed hard for autonomy, arguing that Don Quixote's windmill country deserved its own identity. They got it on May 31st, becoming Spain's largest autonomous community by area. Turns out you can create a region from scratch if enough people agree the old borders were always wrong.

Two Christian saints share this day, connected only by a calendar accident.

Two Christian saints share this day, connected only by a calendar accident. Hermias died under Roman persecution—historians can't agree which century, let alone which emperor ordered it. Petronella's story diverged centuries later in the telling: some called her Peter's actual daughter, others his spiritual convert. The Eastern Orthodox Church venerates both on May 31, though their deaths happened generations apart. What survives isn't their biographies but their names on monastery walls, whispered in prayers by people who never questioned whether the legends were accurate.

The regiment that saved Brunei's independence almost didn't exist.

The regiment that saved Brunei's independence almost didn't exist. Britain created the Royal Brunei Malay Regiment in 1961 with just 250 men, trained them for ceremonial duties, then watched them become the country's only defense when rebellion erupted a year later. Those same soldiers fought Indonesian infiltrators through the 1960s while Brunei debated joining Malaysia. When the Sultan chose full independence in 1984, this small force—still under a thousand strong—became the difference between sovereignty and absorption. Ceremonial units don't usually write constitutions.

Farmers across Sabah and Labuan celebrate Kaamatan to honor the rice spirit, Bambaazon, following the completion of t…

Farmers across Sabah and Labuan celebrate Kaamatan to honor the rice spirit, Bambaazon, following the completion of the annual harvest. This thanksgiving tradition reinforces Kadazan-Dusun cultural identity through traditional dance, ritual offerings, and community feasts, ensuring that ancestral agricultural practices survive alongside the region's rapid modernization.

The tobacco industry knew nicotine was as addictive as heroin by 1963.

The tobacco industry knew nicotine was as addictive as heroin by 1963. Documented it in internal memos. Marketed to teenagers anyway. When the World Health Organization launched World No Tobacco Day in 1987, eight million people were already dying annually from smoking-related diseases—more than malaria, tuberculosis, and HIV combined. The first campaign targeted women specifically, after Philip Morris had spent decades convincing them that cigarettes meant liberation. Today the holiday reaches 194 countries. The industry's annual revenue still exceeds $800 billion. That's roughly the GDP of Switzerland, made from dried leaves and dependency.

Australia picked a cartoon blue koala to represent the 2018 Commonwealth Games on the Gold Coast, and somehow people …

Australia picked a cartoon blue koala to represent the 2018 Commonwealth Games on the Gold Coast, and somehow people loved him so much they made him a permanent fixture. Borobi—named through a public vote from a local Aboriginal word meaning "koala"—became the first sporting mascot anywhere to get his own annual day. The Queensland government declared it official in 2018. Now schools celebrate conservation and indigenous culture every April 4th by honoring a plush character originally meant to sell tickets. He outlasted the Games themselves.

She rode naked through the streets to call her husband's bluff.

She rode naked through the streets to call her husband's bluff. Lady Godiva's lord had taxed Coventry into poverty, and she'd begged him to stop. Fine, he said—I'll lift the taxes when you ride through town wearing nothing but your hair. So she did. The 11th-century noblewoman actually mounted that horse, actually made that ride, and he actually kept his word. The taxes dropped. Coventry's been celebrating her ever since with processions and pageantry, though the modern Lady Godiva gets to wear flesh-colored bodysuits. Medieval tax policy shouldn't require this much courage.

Mary was already pregnant when she traveled to visit her cousin Elizabeth.

Mary was already pregnant when she traveled to visit her cousin Elizabeth. So was Elizabeth—six months along at an age when everyone thought her barren. The moment Mary walked through the door and spoke, Elizabeth's baby moved. Leaped, actually. Elizabeth felt it and immediately understood what her younger cousin was carrying. This wasn't a courtesy call between relatives. It was the first time anyone recognized what was happening to Mary, and she hadn't said a word yet. Sometimes the body knows before the mind catches up.

Undated 47

Guatemala Guatemala: Día de la Constitución Política de la República.Una fecha cívica y nacional que conmemora la pro…

Guatemala Guatemala: Día de la Constitución Política de la República.Una fecha cívica y nacional que conmemora la promulgación de la actual Constitución guatemalteca en el año 1985.

Perú Perú: Día Nacional de Lucha contra la Violencia y Crímenes de Odio hacia Lesbianas, Trans, Gays y Bisexuales

Nuestra Señora del Recuerdo.

Santos Cancio, Canciano y Cancianila.

San Félix de Nicosia.

San Noé Mawaggali.

Santo Cristo de la Salud, patrón de Málaga.

Beatos Roberto Thorpe y Tomás Watkinson.

Beato Félix (Jacobo) Amoroso.

Beato Nicolás Barré.

Dia Mundial do Tripulante de Cabine

Dia dos Irmãos

Aniversário do município de Feliz, Rio Grande do Sul

Aniversário do município de Juiz de Fora, Minas Gerais

Hermes de Filipópolis

Nossa Senhora de Todas as Nações

Anniversary of Royal Brunei Malay Regiment (Brunei)

Namenstage Mechthild

Beato Mariano de Roccacasale.

Beato Mariano de Roccacasale. (Mariano (Domingo) Di Nicolantonio de Roccacasale).

Kirchliche Gedenktage Johann Friedrich Flattich, deutscher Pfarrer (evangelisch)

Beato Jacobo Salomoni.

Crescent de Sassari (en), Crescentien ou Crescent († vers 130), martyr à Sassari en Sardaigne sous Hadrien, aux dates…

Crescent de Sassari (en), Crescentien ou Crescent († vers 130), martyr à Sassari en Sardaigne sous Hadrien, aux dates éventuellement "juliennes" / orientales.

San Silvio de Toulouse, obispo.

Robert Thorpe et Thomas Watkinson († 1591), bienheureux laïc et le second prêtre anglais martyrs.

Noé Mawaggali († 1886), laïc ougandais martyr.

Mechtilde de Diessen († 1160), moniale allemande de l'ordre de saint Augustin et abbesse d'Edelstetten.

Marien de Roccacasale († 1866), bienheureux frère franciscain italien.

Jacques Salomoni († 1314), bienheureux prêtre dominicain italien.

Simplicien (IIe ou IIIe siècle), martyr en Poitou.

Selve († 400) - ou « Sylve » / « Sylvius », quatrième évêque de Toulouse (360-400).

Nérin de Plounérin (VIIe siècle), moine anglais.

Cant († 290 ou 304) - ou « Cantius » -, avec son frère Cantien - ou « Cantianus » -, sa sœur Cantianille - ou « Canti…

Cant († 290 ou 304) - ou « Cantius » -, avec son frère Cantien - ou « Cantianus » -, sa sœur Cantianille - ou « Cantianilla » - et leur précepteur Prot ou « Protus », martyrs à Aquilée en Vénétie julienne sous Dioclétien.

station à Bethléem pour la dédicace de l'Église, avec lectures de Héb.

station à Bethléem pour la dédicace de l'Église, avec lectures de Héb. 1, 1(-12) et de Jn 7, 37(-42), et jour pour mot commun, dans le lectionnaire de Jérusalem.

Journée mondiale de la loutre.

Santa Petronila de Roma.

Día Internacional del Tripulante de Cabina.En honor a Ellen Church, considerada como la primera azafata en el mundo d…

Día Internacional del Tripulante de Cabina.En honor a Ellen Church, considerada como la primera azafata en el mundo de la aviación.

Semana de Solidaridad con los pueblos de los territorios no autónomos.

Día Mundial del Loro.

Argentina Argentina: Día de la Especialidad de Vigilancia y Control Aeroespacial de la Fuerza Aérea Argentina.

Argentina Argentina: Día de la Policía de Seguridad Aeroportuaria.

Argentina Argentina: Día de la Energía Nuclear.Se conmemora la creación de la CNEA.

Argentina Argentina: Día Nacional de la Cerveza.

Argentina Argentina: Día del Guía de Turismo.

Argentina Argentina: Día Nacional del Ecoturismo.

Argentina Argentina: Día Nacional del Ecoturismo. Misiones: Día Provincial del Ecoturismo.

Costa Rica Costa Rica: Día del Compositor Nacional.El 31 de mayo de 1990 es una fecha importante para los compositore…

Costa Rica Costa Rica: Día del Compositor Nacional.El 31 de mayo de 1990 es una fecha importante para los compositores y autores musicales del país, debido a que se constituyó la Asociación de Compositores y Autores Musicales de Costa Rica (ACAM), con el objetivo de hacer efectivo el reconocimiento de sus derechos de autor, establecidos en la constitución política, tratados internacionales y leyes vigentes.

España España: Día de Castilla-La Mancha.Jornada festiva de la comunidad autónoma española, conmemorando el aniversar…

España España: Día de Castilla-La Mancha.Jornada festiva de la comunidad autónoma española, conmemorando el aniversario de la constitución de las Cortes Regionales en 1984.

Estados Unidos Estados Unidos: Utah: Día Nacional de Utah.Se celebra cada año el 31 de mayo esta festividad no oficia…

Estados Unidos Estados Unidos: Utah: Día Nacional de Utah.Se celebra cada año el 31 de mayo esta festividad no oficial está dedicada al estado número 45 de los Estados Unidos; su historia, su cultura, sus paisajes naturales y su gente.(en inglés: Utah National Day).