Why Do We Celebrate Flag Day?

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140th US Flag Day poster.
(Image credit: Library of Congress)

After declaring independence from Great Britain, one of the first orders of business for the freshly-seceded Thirteen Colonies was to fly a new flag. So on June 14, 1777, the Second Continental Congress passed the first Flag Act, which read:

"Resolved, That the flag of the United States be made of thirteen stripes, alternate red and white; that the union be thirteen stars, white in a blue field, representing a new Constellation."

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