The Wrights had their first controlled flight of a heavier-than-aircraft on this date in 1903. I had three separate pieces on the event back on the hundredth anniversary, which was also the day that SpaceShipOne first flew supersonic.
[Late evening update, after all the kvetching in comments]
Jeez, Looeeze, people.
OK, first controlled flight of a powered heavier-than-aircraft. Happy now?