Flag Day is a holiday celebrated on June 14 in the United States. It commemorates the adoption of the flag of the United States on June 14, 1777 by resolution of the Second Continental Congress. The Flag Resolution stated "That the flag of the thirteen United States be thirteen stripes, alternate red and white; that the union be thirteen stars, white in a blue field, representing a new constellation."

The national flag of the United States, often referred to as the American flag or the U.S. flag, consists of thirteen equal horizontal stripes of red alternating with white, with a blue rectangle in the canton, referred to as the union and bearing fifty small, white, five-pointed stars arranged in nine offset horizontal rows, where rows of six stars alternate with rows of five stars. The 50 stars on the flag represent the 50 U.S. states, and the 13 stripes represent the thirteen British colonies that declared independence from Great Britain, which they went on to secure by their victory in the American Revolutionary War.