July 7, 1980, although they didn’t know it at the time, that date would be the last time Led Zeppelin would play a concert together before John Bonham’s passing.
There has been a handful of reunions since then but this was the band going out on top. There was a scheduled US tour in the fall of 1980 and tickets we going on sale when news of John Bonham’s death hit.
Here’s their final concert. A Raw unmixed soundboard recording from July 7, 1980 in Berlin Germany.
http://youtu.be/fPidk8svtmk