What happened 30 September in United States of America

On September 30, a massacre broke out against blacks in Elaine, Phillips County, Arkansas, being distinct for having occurred in the rural South rather than a city. The Elaine massacre or the Elaine race riot occurred on September 30–October 1, 1919, at Hoop Spur in the vicinity of Elaine in rural Phillips County, Arkansas. Although official records of the time state that eleven black men and five white men were killed, estimates of the actual number of black people who were killed range from 100 to 237. The white mobs were aided by federal troops (requested by Arkansas governor Charles Brough) and vigilante militias like the Ku Klux Klan.

National Allied Publications soon merged with Detective Comics, Inc., forming National Comics Publications on September 30, 1946.

National Comics Publications absorbed an affiliated concern, Max Gaines' and Liebowitz' All-American Publications. In the same year Gaines let Liebowitz buy him out, and kept only Picture Stories from the Bible as the foundation of his own new company, EC Comics. At that point, "Liebowitz promptly orchestrated the merger of All-American and Detective Comics into National Comics... Next he took charge of organizing National Comics, [the self-distributorship] Independent News, and their affiliated firms into a single corporate entity, National Periodical Publications".

On September 30, 2004, Sun Microsystems released J2SE 5.0.

On September 30, 2007, someone approached a car containing Randall Carson, Justin Glass, and Corey Smith on foot and fired five shots while they were waiting at a Gainesville traffic light after having left a nightclub. Smith was shot in the back of the head, and Glass was shot in the arm. Both men survived. Carson, a back-seat passenger, was uninjured and told police that the shooter was a "Hawaiian" or "Hispanic" male with a large build weighing about 230 lb (100 kg) and having many tattoos. He picked a photo of Hernandez out of a police lineup.

On September 30, 2014, Microsoft announced Windows 10 as the successor to Windows 8.1. It was released on July 29, 2015, and addresses shortcomings in the user interface first introduced with Windows 8. Changes on PC include the return of the Start Menu, a virtual desktop system, and the ability to run Windows Store apps within windows on the desktop rather than in full-screen mode. Windows 10 is said to be available to update from qualified Windows 7 with SP1, Windows 8.1 and Windows Phone 8.1 devices from the Get Windows 10 Application.

Apple's 2015 update, OS X 10.11 El Capitan, was announced to focus specifically on stability and performance improvements.

On September 30, 2019, after weeks of speculation, The Rock announced that he would be making an appearance on SmackDown's 20th Anniversary on October 4, marking his first appearance on SmackDown since October 2014 and his first televised appearance since April 2016.