League of Women Voters of Wyoming

National Constitution Day
2025-09-17 00:00 - 23:59 (America/Denver)
On this day in 1789, delegates to the Constitutional Convention met in Philadelphia. This observance has been known under different names. In 1940, Congress designated the third Sunday in May as “I Am an American Day.” In 1952, the date was moved to September 15 and renamed “Citizenship Day.”
