Library of Congress, Constitution of the United States: Primary Documents in American History, Introduction:
“The members of the Constitutional Convention signed the United States Constitution on September 17, 1787 in Philadelphia, Pennsylvania. The Constitutional Convention convened in response to dissatisfaction with the Articles of Confederation and the need for a strong centralized government. After four months of secret debate and many compromises, the proposed Constitution was submitted to the states for approval. Although the vote was close in some states, the Constitution was eventually ratified and the new Federal government came into existence in 1789. The Constitution established the U.S. government as it exists today.”
From the U.S. Citizenship and Immigration Services, Citizenship Resource Center, Constitution Day and Citizenship Day:
“On September 17, 1787, the Founding Fathers signed the U.S. Constitution. For over 200 years, the Constitution has served as the supreme law of the land. The Constitution, along with the Bill of Rights and other amendments, define our government and guarantee our rights. Each year, on September 17, Americans celebrate Constitution Day and Citizenship Day. In addition, September 17-23 is also recognized as Constitution Week. During this time, USCIS encourages Americans to reflect on the rights and responsibilities of citizenship and what it means to be a U.S. citizen.”
Source: 2021 American Community Survey (ACS) 1-Year Estimates.
Source: 2019 American Community Survey (ACS) 1-Year Estimates.
From the Decennial Census of Population and Housing > About the Decennial Census:
From Census.gov > History:
From Census.gov > Library: