Día de la Constitución se observó el 17 de Septiembre de 2018. Constitution Day or Citizenship Day is an American federal observance that recognizes the adoption of the United States Constitution and those who have become U.S. citizens. It is normally observed on September 17, the day the U.S. Constitutional Convention signed the Constitution in 1787 in Philadelphia.
The Constitutional Convention - also known as the Philadelphia Convention, the Federal Convention, or the Grand Convention at Philadelphia - took place from May 25 to September 17, 1787, in Philadelphia, Pennsylvania, to address problems in governing the United States of America, which had been operating under the Articles of Confederation following independence from Great Britain.
The Constitution of the United States is the supreme law of the United States of America. The Constitution, originally comprising seven articles, delineates the national frame of government. Its first three articles entrench the doctrine of the separation of powers, whereby the federal government is divided into three branches: the legislative, the executive, and the judicial. (Con material de Wikipedia)