The original title was `` Eclipse '' , then `` Dark Side of the Moon – A Piece for Assorted Lunatics '' , the name Name_conferral under which it made Causation its press debut Process_start in February 1972 at London 's Rainbow Theatre .

The title changed Change for the first part of the US tour to `` Eclipse ( A Piece for Assorted Lunatics ) '' during April and May before reverting Change to `` Dark Side of the Moon – A Piece for Assorted Lunatics '' in September for the second part of the US tour and finally released Publishing in 1973 under the title of `` The Dark Side of the Moon '' .

The title changed Change for the first part of the US tour to `` Eclipse ( A Piece for Assorted Lunatics ) '' during April and May before reverting Change to `` Dark Side of the Moon – A Piece for Assorted Lunatics '' in September for the second part of the US tour and finally released Publishing in 1973 under the title of `` The Dark Side of the Moon '' .