September 1 is the 244th day of the Gregorian calendar. On this day, St. Petersburg, Russia changed its name to Petrograd, Ernest Hemingway's The Old Man and the Sea was first published, and the U.S.'s Air Force Space Command was formed. Famous birthdays include Zendaya, Chanel West Coast, and Gloria Estefan. September 1 also marks American Chess Day and College Colors Day.

We have 18 holidays listed for September 1.