There were many variations of the flag flown as the country was formed, but finally on June 14 th, 1777 (Flag Day or the Flag’ s Birthday), the final design was established. The American Flag began with 13 stripes of alternating red and white, and 13 white stars in a blue field.This represented the ‘New Constellation’ that was the 13 colonies.lag Day originated when a schoolteacher arranged for his pupils to celebrate the ‘Flag’s Birthday’ on the anniversary of the ‘ Stars and Stripes ,’ on June 14 th. In 1894 the governor of New York directed that on this day the Flag be displayed on all public buildings.