When did Michael Jackson perform his series of fifty concerts called "This Is It"?

Explanation

Michael Jackson has appeared in numerous movies, music videos, and documentaries. His first film role was in the movie "The Wiz" from 1978. He has also appeared in "Michael Jackson's Thriller" (1982), "Captain EO" (1986), "Moonwalker" (1988), and "Men in Black II" (2002). In 2009 "Michael Jackson's This Is It" was released. It was a documentary containing clips from rehearsals and preparations for his planned concert series of the same name. Jackson died 18 days before the tour was supposed to start.