Today, the United States is celebrating National Aviation Day, a holiday first established in 1939. It was established by a presidential proclamation by President Franklin D. Roosevelt to designate the anniversary of Orville Wright’s birth (born in 1871) to be a national holiday (Orville was still alive when the proclamation was first issued). It has now been over 120 years since Orville Wright first flew. NASA is sharing 11 ideas for how aviation enthusiasts can celebrate it today.