History by Topic: What Happened On This Day
Pick a topic to see what happened on each day of the year in it: 327 days from our history calendar, each with its year, a one-line summary and a link to the full story and its sources.
Every day is also a round of Years Ago, our daily history game, so days playing today or in the next 30 days are left out until they have played.
- Science History29 daysDiscoveries in astronomy, physics, biology and medicine: new planets, moons and comets, X-rays and gravitational waves, and firsts in treating disease.
- Technology History45 daysInventions, engineering and the companies behind them: railways, bridges and aircraft, the telegraph and radio, computers, video games and the internet.
- Exploration & Space History39 daysJourneys into the unknown: polar expeditions, record flights and crossings, and spacecraft sent into orbit, to the Moon, the planets and beyond.
- Arts & Culture History107 daysBooks, music, film, television, theater and art: premieres, first editions, record releases and the openings of famous works.
- Sports History36 daysGames, records and championships: Olympic Games, World Cup and Super Bowl finals, famous fights and firsts in every sport.
- Social & Political History58 daysPolitics, law and public life: independence days, new states and constitutions, famous speeches, reforms, and the founding of organizations.
- Nature History13 daysThe natural world and its protection: meteorite falls, eclipses and comets, record weather, national parks, and the treaties that set out to protect the planet.
Frequently asked questions
- How are events sorted into topics?
- Each event in the history calendar has one topic: science, technology, exploration, culture, sports, society or nature. An event that could fit two goes where it matters most: the launch of Apollo 11 is exploration, while a telescope sent up to find new planets is science.
- Why does a topic skip some days?
- The calendar has one event per day, so each topic covers only the days whose event is about it. Days playing in Years Ago, our daily history game, today or in the next 30 days are left out until they have played.