1947 (MCMXLVII) was a common year starting on Wednesday of the Gregorian calendar (dominical letter E), the 1947th year of the Common Era (CE) and Anno Domini (AD) designations, the 947th year of the 2nd millennium, the 47th year of the 20th century, and the 8th year of the 1940s decade.
A Philippine plane crashes in Hong Kong, with $5 million worth of gold and money.
A KLM Douglas C-47 Skytrain aircraft crashes soon after taking off from Kastrup Airport, Copenhagen, killing all on board, including Prince Gustaf Adolf, second in line to the Swedish throne, and the American singer Grace Moore.
In Paris, France, peace treaties are signed between the World War II Allies and Italy, Hungary, Romania, Bulgaria, and Finland. Italy cedes most of Istria to the Socialist Federal Republic of Yugoslavia (later Croatia).
An explosion at the O'Connor Electro-Plating Company in Los Angeles, leaves 17 dead, 100 buildings damaged, and a 22-foot-deep (6.7 m) crater in the ground.
U.S. Army Ordnance Corps, Hermes missle program, launched the "Blossom I" V-2 rocket into space carrying plant material and fruitflies, the first animals to enter space.
Previous discovery of the 'Sea scrolls' in the Qumran Caves (above the northwest shore of the Dead Sea) by Bedouin shepherds, becomes known.
Seaman Harold Dahl claims to have seen six unidentified flying objects (UFOs) near Maury Island in Puget Sound, Washington. On the next morning, Dahl reports the first modern so-called "Men in Black" encounter.
U.S. President Harry S. Truman signs the National Security Act of 1947 into law, creating the Central Intelligence Agency, the Department of Defense, the Joint Chiefs of Staff, and the National Security Council.
In Long Beach, California, the designer and airplane pilot Howard Hughes carries out the one and only flight of the Hughes H-4 Hercules, the largest fixed-wing aircraft ever built and flown. This flight only lasted eight minutes.
Princess Elizabeth (later Elizabeth II), the daughter of George VI, marries the Duke of Edinburgh at Westminster Abbey in London, United Kingdom.