What makes this date distinctive?

Source: Share America Gov

What makes this date distinctive?

Americans celebrate Independence Day on July 4, the date in 1776 when the 13 colonies declared independence from Great Britain. The new nation went on to make history in the fields of science, literature, architecture, engineering, space exploration and more.

As the world marks 250 years of U.S. independence, take a look back at other milestones accomplished on the Fourth of July.

(State Dept.)

 

 

What makes this date distinctive?