On this day...

313 - Roman emperor Licinius unifies the entire Eastern Roman Empire under his rule.
711 - Islamic conquest of Hispania: Moorish troops led by Tariq ibn-Ziyad land at Gibraltar to begin their invasion of the Iberian Peninsula (Al-Andalus).
1006 - Supernova SN 1006, the brightest supernova in recorded history, appears in the constellation Lupus.
1483 - Orbital calculations suggest that on this day Pluto moved inside Neptune's orbit until July 23, 1503.
1492 - Spain gives Christopher Columbus his commission of exploration.
1671 - Petar Zrinski, the Croatian Ban from the Zrinski family, is executed.
1794 - The Battle of Boulou is fought, in which French forces defeated the Spanish under General Union.
1789 - On the balcony of Federal Hall on Wall Street in New York City, George Washington takes the oath of office to become the first elected President of the United States.
1803 - Louisiana Purchase: The United States purchases the Louisiana Territory from France for $15 million, more than doubling – overnight – the size of the young nation.
1812 - The Territory of Orleans becomes the 18th U.S. state under the name Louisiana.
1838 - Nicaragua declares independence from the Central American Federation
1856 - Battle of Rivas, Nicaragua, against northamerican mercenaries.
1863 - Mexican forces attacked the French Foreign Legion in Hacienda Camarón, Mexico.
1871 - Camp Grant Massacre takes place in Arizona Territory.
1894 - Coxey's Army reaches Washington, D.C. to protest the unemployment caused by the Panic of 1893.
1900 - Hawaii becomes a territory of the United States, with Sanford B. Dole as governor.
1900 - Casey Jones dies in a train wreck in Vaughn, Mississippi, while trying to make up time on the Cannonball Express.
1904 - The Louisiana Purchase Exposition World's Fair opens in St. Louis, Missouri.
1920 - Peru becomes a signatory to the Buenos Aires copyright treaty.
1925 - Automaker Dodge Brothers, Inc is sold to Dillon, Read & Company for USD $146 million plus $50 million for charity.
1927 - The Federal Industrial Institute for Women, opens in Alderson, West Virginia, as the first women's federal prison in the United States.
1938 - The animated cartoon short Porky's Hare Hunt debuts in movie theaters, introducing Happy Rabbit.
1939 - The 1939 New York World's Fair opens.
1939 - RCA owned NBC begins regularly scheduled television service from its New York station with the opening ceremonies of the 1939 New York World's Fair broadcast.
1939 - Franklin D. Roosevelt becomes the first President of the United States to appear on television during the World Fair's opening ceremonies broadcast.
1943 - World War II: Operation Mincemeat – The submarine HMS Seraph surfaces in the Mediterranean Sea off the coast of Spain to deposit a dead man planted with false invasion plans and dressed as a British military intelligence officer.
1945 - Adolf Hitler and Eva Braun commit suicide after being married for one day.
1947 - In Nevada, the Boulder Dam is officially renamed Hoover Dam again.
1948 - In Bogotá, Colombia, the Organization of American States is established.
1966 - The Church of Satan is founded.
1973 - Watergate Scandal: President Richard Nixon announces that top White House aids H.R. Haldeman, John Ehrlichman, and others have resigned.
1975 - Fall of Saigon: Communist forces gains control of Saigon. The Vietnam War formally ends with the unconditional surrender of South Vietnamese president Duong Van Minh.
1980 - Accession of Queen Beatrix of the Netherlands.
1988 - French-Canadian singer Céline Dion wins the Eurovision Song Contest in Dublin, Ireland in front of 600 million viewers, representing Switzerland with the song Ne partez pas sans moi
1991 - A tropical cyclone hits Bangladesh killing an estimated 138,000 people.
1993 - The World Wide Web was born at CERN.
1993 - During a tennis match between #1 female tennis player Monica Seleš and Magdalena Maleeva, Günter Parche plunged a steak knife between Seleš's shoulderblades. Seleš did not return to competitive tennis for over two years.
1995 - U.S. President Bill Clinton became the first U.S. President to visit Northern Ireland.
1999 - Cambodia joins the Association of Southeast Asian Nations (ASEAN) bringing the total members to 10.
2001 - The Mitchell Report on the Arab-Israeli conflict is published.
2002 - A referendum in Pakistan overwhelmingly approves the Presidency of Pervez Musharraf for another five years.
2006 - Trapped miners Brant Webb and Todd Russell at Beaconsfield, Tasmania are found alive after being unaccounted for for five days.
2007 - Last day when it is legal to smoke in a public building in Northern Ireland
2007- The king of sweden has his 61:th birthday

Oh- it´s my birthday too!