Holidays September 17, 2024 6:23 pm What is Constitution Day? Constitution day is a federal holiday that commemorates the signing of the U.S. Constitution in 1787. Local 3:11 Camila Fernández kicks off first tour in the US 1:07 WATCH: Word War II era US bomb explodes at Japan airport 1:19 Judge: Biden's student loan forgiveness can move forward for now 1:39 George Clooney and Amal Clooney reveal their twins' favorite hobbies 1:49 Death toll from Helene climbs, hundreds still missing