The discography of the English rock band Led Zeppelin consists of nine studio albums, four live albums, nine compilation albums, 16 singles and eight music downloads. Formed in London in 1968, the group consisted of guitarist Jimmy Page, singer Robert Plant, bass player John Paul Jones, and drummer John Bonham.
 The band pioneered the concept of album-oriented rock and often refused to release popular songs as singles.
 Nevertheless, four of their ten songs that reached the Hot 100 had no mention of the title in the lyrics: "Immigrant Song", "Black Dog", "Over the Hills and Far Away", "D'yer Mak'er".
 Their debut album, "Led Zeppelin" (1969), released by Atlantic Records, charted at number six on the UK Albums Chart and at number ten on the United States "Billboard" 200.
 It received several sales certifications, including an 8 times multi-platinum from the Recording Industry Association of America (RIAA) and Diamond from the Music Canada.
 Led Zeppelin's second studio album, "Led Zeppelin II", recorded when the band were on tour, was released a few months after the first.
 It reached number one in several countries, including the UK and the US, where it was certified 12 times multi-platinum.
 The album produced Led Zeppelin's most successful single, "Whole Lotta Love", which peaked at several music charts in the top 10. "
Led Zeppelin III" (1970) was a softer, more folk-based effort compared to the hard rock of the band's previous releases.
 It also peaked at number one in the UK and in the US.
Led Zeppelin II is the eponymous second studio album by the English rock band Led Zeppelin, released on 22 October 1969 in the United States and on 31 October 1969 in the United Kingdom by Atlantic Records.
 Recording sessions for the album took place at several locations in both the United Kingdom and North America from January to August 1969.
 The album's production was credited to the band's lead guitarist and songwriter Jimmy Page, and it also served as Led Zeppelin's first album to utilise the recording techniques of the engineer Eddie Kramer.
 Incorporating several elements of blues and folk music, "Led Zeppelin II" exhibited the band's evolving musical style of blues-derived material and their guitar riff-based sound.
 It has been described as the band's heaviest album.
Led Zeppelin DVD is a double DVD set by the English rock band Led Zeppelin, released in the United Kingdom on 26 May 2003, and the United States on 27 May 2003.
 It contains live concert footage of the band spanning the years 1969 to 1979.
 The DVD includes performances from the Royal Albert Hall in 1970, Madison Square Garden in 1973, Earls Court in 1975, and Knebworth in 1979, plus other footage.
 Bootleg footage from some of the concerts is interspersed with the professionally shot material.
Listen To This, Eddie is a bootleg recording of a rock concert by English band Led Zeppelin, performed on June 21, 1977, at the Los Angeles Forum in Los Angeles, California.
 The first concert of a six-night stint.
 It is often noted as one of the band's best (if not the best) performances.
 It is also distinguished by its clear sound.
The Led Zeppelin bootleg recordings are a collection of audio and video recordings of musical performances by the English rock band Led Zeppelin which were never officially released by the band, or under other legal authority.
 The recordings consist of both live concert performances and outtakes from studio sessions conducted by the band.
 Many hundreds of Led Zeppelin bootlegs exist, and are widely collected by fans.
"Immigrant Song" is a 1970 song by the English rock band Led Zeppelin.
 It is built on a repeating riff and features lyrical references to Norse mythology, with singer Robert Plant's howling vocals mentioning war-making and Valhalla .
 The song was included on their third studio album, "Led Zeppelin III", and was released as a single, which charted in several countries.
 Several live recordings have also been issued on Led Zeppelin concert albums and other artists have recorded renditions of the song.
Physical Graffiti is the sixth studio album by the English rock band Led Zeppelin, released as a double album on 24 February 1975 by their newly founded imprint label Swan Song Records.
 The band wrote and recorded eight new songs for the album at Headley Grange, which stretched the total time of the record beyond the typical length of a single LP, so the band decided to make "Physical Graffiti" a double album by including unreleased tracks from earlier recording sessions: one outtake from "Led Zeppelin III," three from "Led Zeppelin IV," and three from "Houses of the Holy", including the unused title track from the latter album.
Led Zeppelin were an English rock band formed in London in 1968.
 The group consisted of guitarist Jimmy Page, singer Robert Plant, bassist and keyboardist John Paul Jones, and drummer John Bonham.
 The band's heavy, guitar-driven sound has led them to be cited as one of the progenitors of heavy metal, though their unique style drew from a wide variety of influences, including blues, psychedelia, and folk music.
For Badgeholders Only is a bootleg recording of a rock concert by English band Led Zeppelin, performed on June 23, 1977 at the Los Angeles Forum in Los Angeles, California, a show which came towards the end of the band's 1977 North American concert tour.
"Communication Breakdown" is a song by the English rock band Led Zeppelin, from their 1969 debut album "Led Zeppelin".
 It was released as the B-side of "Good Times Bad Times", the group's first single in the US.
 A promotional video was released, with the group miming to the recording; it is included on the "Led Zeppelin DVD" (2003).

Question: For Badgeholders Only is a bootleg recording of a rock concert by English rock band Led Zeppelin, performed on which date?
Answer: June 23, 1977