When does the U.S. Army celebrate its birthday?

The U.S. Army celebrates its birthday on June 14, 1775. This date marks the establishment of the Continental Army by the Second Continental Congress, which was created to fight for American independence from British rule. This foundational moment is significant in U.S. history, as it represents the beginnings of a national military force dedicated to protecting the interests and freedom of the nation.

The other choices represent different dates pertinent to military history but do not correspond to the official birthday of the Army. For instance, February 12, 1776, is not associated with a military establishment; rather, it is significant in other historical contexts. April 15, 1783, signifies the end of the Revolutionary War with the ratification of the Treaty of Paris. August 4, 1790, pertains to the establishment of the U.S. Revenue Cutter Service, which is a different branch of military service and not related to the U.S. Army. Therefore, June 14, 1775, is accurately recognized as the date when the U.S. Army was formed.