"Diversity Day" is the second episode of the first season of the American comedy television series The Office. Written by B. J. Novak and directed by Ken Kwapis, it first aired in the United States on March 29, 2005, on NBC. The episode guest-stars Office consulting producer Larry Wilmore as Mr. Brown.
In this episode, Michael's controversial imitation of a Chris Rock routine, Niggas vs. Black People, forces the staff to undergo a racial diversity seminar. From Wikipedia