California Admission Day
September 9, Saturday
California Admission Day is a legal holiday in the state of California, United States. It is celebrated as a day of observance annually on September 9 to commemorate the anniversary of the 1850 admission of California into the Union as the thirty-first state. The City of Monterey, California, where the state Constitutional Convention was first held, observes this day as a City holiday, where city offices and most facilities are closed.