1909 - 1st flight of the Antoinette VII, French experimantal monoplane, further development of the Antoinette IV, with increased engine power and using a wing warping system developed by Levavasseur for the Antoinette V in place of the Antoinette IV's ailerons.
1909 - 1st flight across a large body of water in a heavier-than-air craft is made by French Louis Blériot, who flies his Blériot No.XI monoplane from Les Baraques (near Calais, France) across the Channel to Dover, England in 37 minutes.
1915 – RFC Captain Lanoe Hawker becomes the 1st British military aviator to earn the Victoria Cross, for defeating three German two-seat observation aircraft in one day, over the Western Front.
1915 - Birth of Joseph Patrick "Joe" Kennedy, Jr.,American bomber pilot during WWII. Elder brother of future U.S. President John F. Kennedy, he had been expected to become the family's political standard-bearer.
1916 - Birth of Stefan Pucas, Romanian WWII flying ace
1918 - Harold Ross Harris (along with his co-pilot, George Lewis) commanded the 1st US Army flight flying heavy bombers (Caproni) on a reconnaisance mission over the Alps from Italy to France and return.
1918 - Death of Joseph Henry Siddall, British WWI flying ace, Killed in action in his Sopwith Camel.
1918 - Death of John Steele Ralston, Scottish WWI flying ace, Killed in action in his S.E.5a.
1923 - 1st Canadian built amphibian, the Vickers type 85 Viking IV, was flown from the St. Lawrence at Montreal.
1927 - Carleton Cole Champion took off from Anacostia, D.C., in the Wright XF3W Apache rigged as a landplane and reached 38,419 feet, establishing a new world record
1932 - Birth of Paul Joseph Weitz, USN Pilot and NASA astronaut
1934 - 1st flight of the Potez 41, French 5 seat low wing monoplane 4 engined (tandem configuration) bomber prototype.
1935 - 1st flight of the Latécoère 582, French parasol-wing monoplane 3 engined long-range patrol flying-boat prototype.
1936 - 1st flight of the Lioré et Olivier LeO H-47, French 4 engines (Tandem tractor-Pusher) high-wing flying boat.
1937 - 1st flight of the Amiot 370, twin seat twin engine prototype, evolution of the Amiot 340, designed for long distance raids.
1937 – The Battle of Brunete ends. During the 20-day-long battle, the Republicans have lost about 100 aircraft, while the Nationalists have lost 23. The appearance of the German Messerschmitt Bf 109 fighter and Heinkel He 111 bomber and the Italian Savoia-Marchetti SM.79 bomber in numbers during the battle signals the end of Republican air superiority in the Spanish Civil War.
1938 – The Battle of the Ebro begins in Spain with a Republican offensive. Although Nationalist bombers attack bridges over the Ebro, Nationalist fighters are still deployed in Valencia and Spanish Republican fighter pilots trained in the Soviet Union gain local air superiority flying improved versions of the Polikarpov I-15 and I-16.
1939 - Deutsche Lufthansa Focke Wulf Fw-200 'Condor', Takes off from Berlin to Bangkok in Siam, inaugurating a regular service.
1939 - 1st flight of The Avro 679 Manchester, British twin-engine heavy bomber, forerunner to the famous Avro Lancaster.
1941 - 1st flight of the Max Holste MH-20, French low wing monoplane racer prototype.
1943 - Last raid on Essen during the Battle of the Ruhr. 705 aircraft of which 3.7 were lost. The raid had been planned to take advantage of the recent introduction of "Window". "The Krupps works suffered what was probably its most damaging raid of the war".
1944 - Death of James Cairn 'Bud' Mars (also known as the Curtiss Daredevil), American aviation pioneer
1946 – Baker Test during Operation Crossroads: an atomic bomb is detonated underwater in the lagoon of Bikini atoll.
1948 - On the 39th anniversary of Bleriot's crossing of the Channel, the Vickers 618 Nene-Viking loaded with passengers (24 was the usual maximum) at London Heathrow and flew them in great comfort to Villacoublay, Paris, in 34 min 7 sec, less than half the regular scheduled time and faster than a previous record set by a Spitfire.
1949 - Squadron Leader Bob Kipp of the Canadian Blue Devils aerobatic team is killed in a training accident in his de Havilland Vampire near St Hubert.
1957 - Birth of Daniel Wheeler Bursch, USN test pilot and NASA astronaut,
1959 - Death of Wolfram Kurt Erhard Hirth , German gliding pioneer and sailplane designer.
1959 - The sole Snecma C-450 'Coleoptère', French single-person with an annular wing VTO aircraft prototype, is destroyed when control is lost at an altitude of about 75m during transition from vertical to horizontal flight.
1962 - 1st flight of the Jurca MJ-5 'Sirocco', French two-seat low-wing cantilever monoplane of conventional configuration and wooden construction sport aircraft marketed for homebuilding.
1973 - Launch of Mars 5, unmanned Soviet spacecraft which intended to explore Mars.
1977 - 1st flight of The Aero Design DG-1, American racing prototype aircraft, built in an attempt to break the world airspeed record for a piston-engined aircraft, single-seat with two Mazda RX-3 engines installed, one driving a tractor propellor, the other driving a pusher.
1979 - 1st flight of The PZL-Mielec M-20 Mewa (Gull), licence-built version of the Piper PA-34 Seneca II manufactured in Poland by WSK PZL Mielec.
1984 – Soyuz T-12 : cosmonaut Svetlana Savitskaya becomes the 1st woman to perform a space walk.
1985 - Death of Thomas Frederic Williams, Canadian WWI fighter ace, Barnstormer, one of the founder of the RCAF, chief test pilot for Fleet Aircraft Company, aerobatic pilot and author.
1987 - Death of Charles Stark Draper, American scientist and engineer, often referred to as "the father of inertial navigation."
1997 - Death of Commander Peter 'Hoagy' Carmichael, British fighter pilot with the Royal Navy during and after WWII.
1999 - Swedish Mikael Carlson, re-enacted the 1st cross-Channel flight 90 years after Louis Blériot's historic journey, flying his own vintage Blériot XI plane.
2000 - Air France Flight 4590 Concorde catches fire after takeoff, crashing and killing all 100 passengers, nine crew and four people on the ground, at Gonesse, France. This was the only fatal crash of a Concorde. It was the beginning of the end for the Concorde as an airliner
2001 - STS-104, Space Shuttle Atlantis mission to the International Space Station (ISS), is back on earth
2003 - Death of Ludwig Bölkow, German aeronautical pioneer.
2009 - Celebrating the 1st cross-Channel flight 100 years after Louis Blériot's historic journey, French Edmond Salis crosses the Channel in a Bleriot XI replica.
2011 - Death of Arthur Warren "Kit" Murray, American test pilot who flew test flights on the Bell X-1 and the Bell X-5 aircraft.