Jimi Hendrix fans will want to mark September 4 on their calendars.

That evening will see the world premiere of a new documentary, Jimi Hendrix: Electric Church, on Showtime.

Directed by John McDermott, the film captures the guitar legend’s performance at the Atlanta Pop Music Festival in July of 1970 — just two months before his death.

During the performance — which was his largest ever in the U.S. — Hendrix blazes through such classics as “Purple Haze,” “Freedom,” “Hey Joe” and his version of “The Star-Spangled Banner,” the latter against a backdrop of fireworks.

The documentary includes never before seen footage, plus interviews withPaul McCartney, Steve Winwood and Hendrix’s late, great drummer Mitch Mitchell.

Jimi Hendrix: Electric Church will premiere September 4 at 9:00 pm ET/PT on Showtime.

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