“NEW YORK (CBS) – David Letterman will host his final broadcast of the “Late Show” on Wednesday, May 20, 2015 (11:35 PM-12:37 AM, ET/PT) on CBS, it was announced today by CBS and Worldwide Pants Incorporated, Letterman’s production company.”
via David Letterman To Host Final “Late Show” May 20, 2015 « CBS Los Angeles.