April 21 is the 111th day of the year (112th in leap years) in the Gregorian calendar; 254 days remain until the end of the year. 753 BC – Romulus founds Rome (traditional date). 43 BC – Battle of Mutina: Mark Antony is again defeated in battle by Aulus Hirtius, who is killed.

2011年4月21日 · 1794 Joséphine de Beauharnais, future Empress of French and first wife of Napoleon Bonaparte, is imprisoned during the Reign of Terror. 1796 Napoleon and the French defeat the Piedmontese at Battle of Mondovi. 1820 Danish scientist Hans Christian Ørsted is the first to identify electromagnetism, when he observes a compass needle.

On This Day In History - April 21: anniversaries, birthdays, major events, and time capsules. This day's facts in the arts, politics, and sciences.

Le 21 avril est le 111e jour, moins souvent le 112e, de l' année du calendrier grégorien ; il en reste ensuite 254. Son équivalent était généralement le 2e jour du mois de floréal, dans le calendrier républicain ou révolutionnaire français, officiellement dénommé jour du chêne.

April 21 Today's: 753 BC - Today is the traditional date of the foundation of Rome. 43 BC - Marcus Antonius was defeated by Octavian near Modena, Italy. 1526 - Mongol Emperor Babur annihilated the Indian Army of Ibrahim Lodi. 1649 - The Maryland Toleration Act was passed, allowing all freedom of worship. ...

2014年4月22日 · April 21 Holidays and Observances, Birthdays, Deaths, Events, This Day in History, Recipe of the Day, Song of the Day, Quote and Word of the Day, and more!

2011年4月21日 · Henry VIII, who became King of England on this day in history, disposed of two wives in his quest for a son and heir – and was to marry four others. What nationality was WWI fighter ace The Red Baron? What was Elvis Presley's 1st #1 hit record? What country is the Chernobyl nuclear power station located in? Who Wrote Shakespeare?

Discover what happened on April 21 with HISTORY's summaries of major events, anniversaries, famous births and notable deaths.

April 21st is officially World Creativity and Innovation Day & Kindergarten Day. We made it to day 111 of the year, and there are 254 days remaining until the end of 2025. If today is a special day for either you or a loved one, you should check out these historical events and facts about this day that helped shape the world we live in today.

April 21: Natale di Roma in Italy (AD 47) 900 – A debt was pardoned by the chief of Tondo on the island of Luzon and recorded on the Laguna Copperplate Inscription, the earliest known calendar-dated document found in the Philippines.