American Flag of 15 Stripes
January 13.
Two stars and stripes (Kentucky and Vermont) are added, making 15 stars and stripes.
The practice of adding a stripe for each new state entering the Union was eventually deemed impractical and the Flag Act of 1818 specified a flag of 13 stripes, one for each of the original colonies, and 20 stars, one for each state currently in the union, with new stars to be added as new states entered the Union..