In August 1949, President Harry S. Truman proclaimed June 14 as Flag Day, and since then all Americans
in the country are encouraged to display the Stars and Stripes outside their homes and businesses.
Old Glory was flown from sea captain William Driver's merchant ship in the 1820's/1830's. It was originally a 24 star flag, and later 10 more stars were added for the states that had joined the union.
The Grand Union Flag is considered to be the first National Flag of the United States and was first flown on December 2, 1775 by John Paul Jones.
The Betsy Ross Flag was designed during the American Revolution. According to the legend, the original Betsy Ross Flag was made on July 14, 1776, and in use by 1777. Even though it is disputed that she actually sewed the first Flag, Americans have accepted Betsy Ross' story as history.
Please note-I compiled this information from About.com-Homeschooling, from an article written by Beverly Hernandez on the The History of Flag Day.
On a lighter note, our old friend Mark Twain says,
"Age is an issue of mind over matter. If you don't mind, it doesn't matter!"