April 28, 1973 - 1973, Pink Floyd’s The Dark Side Of The Moon went to No.1 in the US.

1973, Pink Floyd’s The Dark Side Of The Moon went to No.1 in the US. The album went on to enjoy a record-breaking 741 discontinuous weeks on the Billboard chart, and has now sold over 45 million copies world-wide. After moving to the Billboard Top Pop Catalog Chart, the album notched up a further 759 weeks there, and had reached a total of over 1,500 weeks on the combined charts by May 2006. 

Check out this bootleg audio of the a live performance from Bristol in 1974.









Or this video of "Time" from a live performance at Wembley in 1974