When was the Declaration of Independence adopted?

The Declaration of Independence was adopted on July 4, 1776, which is now celebrated in the United States as Independence Day. This document officially declared the thirteen American colonies' separation from British rule. The significance of this date is profound, as it marks the birth of the United States and is a symbol of liberty and democracy around the world. The adoption of the Declaration was a pivotal moment in history, laying the foundational principles of freedom and self-governance that continue to influence political thought today.

The other options, while close in date, do not reflect the historic moment when the Continental Congress formally approved the final text of the Declaration. Therefore, July 4, 1776, stands out as the correct answer in terms of the event's importance and its lasting impact on the nation.