onthisday.me

On this day

May 1 Friday, May 1, 2026

A curious almanac of what happened on May 1 across the years — history, birthdays, the songs that ruled the charts, the films that packed cinemas, and the science that nudged the world forward.

🎂

Were you born on May 1?

Find out what the world looked like the day you arrived.

12
Events
7
Birthdays
8
Holidays
War 357 years ago

Henry Morgan's raid on Lake Maracaibo: the Spanish Armada de Barlovento is defeated by an English Privateer fleet led by Captain Henry Morgan.

Captain Henry Morgan's privateer fleet defeats the Spanish Armada de Barlovento, enabling his escape from Lake Maracaibo with plundered treasure.

History

What happened on May 1

12 verified entries Full timeline
  1. 305

    Diocletian and Maximian retire from the office of Roman emperor.

    Diocletian and Maximian step down, ending nearly two decades of joint rule in the tetrarchy system.

    World history
  2. 418

    A synod in Carthage condemns Pelagianism.

    The Synod of Carthage condemns Pelagianism, a theological doctrine that emphasizes the role of human free will in salvation.

    Religion
  3. 880

    The Nea Ekklesia is inaugurated in Constantinople, setting the model for all later cross-in-square Orthodox churches.

    The Nea Ekklesia is inaugurated in Constantinople, establishing the architectural template for future Orthodox churches.

    Religion
  4. 1169

    Norman mercenaries land at Bannow Bay in Leinster, marking the beginning of the Norman invasion of Ireland.

    Norman mercenaries led by Richard de Clare, also known as Strongbow, land at Bannow Bay, initiating the Norman conquest of Ireland.

    UK history
  5. 1328

    Wars of Scottish Independence end: By the Treaty of Edinburgh-Northampton, England recognises Scotland as an independent state.

    England recognizes Scotland as an independent kingdom under the Treaty of Edinburgh-Northampton, ending decades of conflict in the Wars of Scottish Independence.

    UK history
  6. 1455

    Scottish Royal forces loyal to King James II defeat a rebel army of the Black Douglases in the battle of Arkinholm.

    King James II's royal forces defeat the Black Douglas rebels at the Battle of Arkinholm.

    UK history
  7. 1492

    The Edict of Expulsion is officially proclaimed in Castile, requiring all Jewish residents to leave within three months.

    King Ferdinand and Queen Isabella issue the Edict of Expulsion, decreeing that all Jewish residents must leave Castile within three months.

    European history
  8. 1669

    Henry Morgan's raid on Lake Maracaibo: the Spanish Armada de Barlovento is defeated by an English Privateer fleet led by Captain Henry Morgan.

    Captain Henry Morgan's privateer fleet defeats the Spanish Armada de Barlovento, enabling his escape from Lake Maracaibo with plundered treasure.

    War
  9. 1707

    The Act of Union joining England and Scotland to form the Kingdom of Great Britain takes effect.

    England and Scotland are united to form the Kingdom of Great Britain.

    UK history
  10. 1753

    Publication of Species Plantarum by Linnaeus, and the formal start date of plant taxonomy adopted by the International Code of Botanical Nomenclature.

    Linnaeus publishes "Species Plantarum," establishing the foundation for modern plant taxonomy.

    Science
  11. 1865

    The Empire of Brazil, Argentina, and Uruguay sign the Treaty of the Triple Alliance.

    Brazil, Argentina, and Uruguay sign the Treaty of the Triple Alliance, forming an alliance against Paraguay.

    World history
  12. 1931

    The Empire State Building is dedicated in New York City.

    President Herbert Hoover officially opens the Empire State Building, which at 1,250 feet becomes the world's tallest building.

    US history

Born today

Famous birthdays on May 1

Music

The number one songs on May 1

Across the years Full chart history
One Dance album cover

🇬🇧 #1 on May 1, 2016

"One Dance"

by Drake featuring Wizkid and Kyla

#1 for 15 weeks

Also #1 on this day

  • 2026
    "Drop Dead"
    — Olivia Rodrigo
  • 2025
    "Ordinary"
    — Alex Warren
  • 2024
    "Too Sweet"
    — Hozier
  • 2023
    "Wish You the Best"
    — Lewis Capaldi
  • 2022
    "As It Was"
    — Harry Styles
  • 2021
    "Montero (Call Me by Your Name)"
    — Lil Nas X

Film & TV

At the movies

Box office #1 and premieres All releases
The Empire Strikes Back poster

Box-office #1

The Empire Strikes Back

1980 · dir. Irvin Kershner

Wide US release on May 23, 1980. Goes on to become the highest-grossing film of the year.

Sci-fiStar Wars $538M worldwide
🏆 Sport

May 1, 1994

Three-time Formula One champion Ayrton Senna is killed in an accident during the San Marino Grand Prix.

Ayrton Senna dies in a crash at the San Marino Grand Prix.

Read the story
🔬 Science

May 1, 1956

The polio vaccine developed by Jonas Salk is made available to the public.

Jonas Salk's polio vaccine becomes available to the public, offering hope for preventing the paralyzing disease.

Read the story

Today is also

Holidays & observances

8 celebrated today

Armed Forces Day (Mauritania)

International

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 to honoring the arm

Constitution Day (Argentina, Latvia, Marshall Islands)

International

Constitution Day is a holiday to honour the constitution of a country

Commemoration of the states of Maharashtra and Gujarat following the foundation of Samyukta Maharashtra Samiti (India): Maharashtra Day

International

Maharashtra Day is a state holiday in the Indian state of Maharashtra, commemorating the formation of the state of Maharashtra in India from the division of the Bombay State on 1 May 1960

International Sunflower Guerrilla Gardening Day

International

Guerrilla gardening is the act of gardening, raising food, plants, or flowers, on land that gardeners do not have the legal right to cultivate, such as abandoned sites, neglected public spaces, or p

Lei Day (Hawaii)

International

Lei Day is a statewide celebration in Hawaii

International Workers' Day or Labour Day (International), and its related observances: Law Day (United States), formerly intended to counterbalance the celebration of Labour Day. (United States)

International

On May 1 the United States officially recognizes Law Day

The world is my country, all mankind are my brethren, and to do good is my religion.

Thomas Paine · born May 1, 1737