Constitution Day and Citizenship Day in United States Constitution Day and Citizenship Day is a combined event that is annually observed in the United States on September 17. This event commemorates the formation and signing of the Constitution of the United States on September 17, 1787. It also recognizes all who, by coming of age or by naturalization, have become US citizens. Constitution Day and Citizenship Day in the United States recognize both the importance of the nation's constitution and its citizens. What do people do?
The United States president may issue each year a proclamation calling on government officials within the nation to display the country's flag on government buildings on Constitution Day and Citizenship Day, as well as inviting the people to observe this event in schools, churches, or other suitable places, with appropriate ceremonies.

Various civil and educational authorities and individuals throughout the United States observe Constitution Day and Citizenship Day through a range of events and activities each year. For example, the Center for Civic Education provides lesson topics on Constitution Day and Citizenship Day for students at different levels. The US Department of Education provides various resources on the event as the department is responsible for implementing Constitution Day legislated mandates. Among these is the requirement for educational institutions that receive federal funds to hold an educational program on the United States Constitution on September 17 each year.

Public life
Many people observe Constitution Day and Citizenship Day, which is not a federal public holiday, in the United States.

Background
On Constitution Day and Citizenship Day, an event which falls during Constitution Week, many people in the United States recognize the anniversary of the nation’s constitution and the efforts and responsibilities of all citizens. With regard to the nation’s constitution, in the summer of 1787 delegates convened in Philadelphia to create “a more perfect unionâ€