As the legend goes, it was George Washington and two other members of the Continental Congress who asked Betsy Rossto sew the first American flag sometime in the late spring of 1776. The young widow was only in her early 20's when she completed the first flag with thirteen stars arranged in a circle.
A year later, the Continental Congress officially adopted the design for the national flag, and henceforward the Stars and Stripes symbolized the U.S. around the world.
The first "official" Flag Day was celebrated in 1877 - the flag's centennial. In 1916, a grass roots movement resulted in President Woodrow Wilson issuing a proclamation that called for a nationwide observance of Flag Day on June 14. Although still not an official holiday, Flag Day was made a permanent observance in America in 1949 by Congress who resolved "That the 14th day of June of each year is hereby designated as Flag Day."
Flag Day fun facts
Why red, white and blue? To the original members of the Continental Congress, red stood for hardiness and courage, white for purity and innocence, and blue for vigilance and justice.
Also research June 19, 1865 (Juneteenth)