holidays

Wright Brothers Day, a United States federal observance by Presidential proclamation

Wright Brothers Day

United States national observation

Wright Brothers Day is a United States national observation. It is codified in the US Code, and commemorates the first successful flights in a heavier-than-air, mechanically propelled airplane, the Wright Flyer, that were made by Orville and Wilbur Wright on December 17, 1903,…
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United States federal observances

United States federal observances are days, weeks, months, or other periods designated by the United States Congress for the commemoration or other observance of various events, activities, or topics. These observances differ from federal holidays in that federal employees only…
Source: Wikipedia (CC BY-SA)

Presidential proclamation

Statement issued by a US president on a matter of public policy

In the United States, a presidential proclamation is a statement issued by the president of the United States on an issue of public policy. It is a type of presidential directive.
Source: Wikipedia (CC BY-SA)