X, formerly Twitter, to shutter its San Francisco headquarters on Sept. 13

X, formerly known as Twitter, has revealed when it will permanently close its San Francisco headquarters after the Elon Musk-owned company earlier this year announced plans to move its operations to Texas. 

The official closing date will be Friday, Sept. 13, Fortune first reported, citing a person familiar with the matter. X informed employees of the impending office closure in a memo Thursday, according to the publication. New York Times reporter Kate Conger, who covers X, also reported that the headquarters will close Sept. 13. 

Twitter was launched in San Francisco in 2006, and its first headquarters was at 164 South Park Ave.