The user query is to find a list of the American flags with images, dates, and explanations of the changes. The following document provides a concise and informative answer to the query, based on the original information provided.

• The US national flag has undergone 27 changes since its first official design in 1777, each reflecting the admission of new states and the modification of the stars and stripes. The current flag has 50 stars and 13 stripes, representing the 50 states and the original 13 colonies. ^{ushistory.org 2 3 1 4}