This day in music history.

February 17, 1972, At the end of their UK tour, Pink Floyd play a three night stand at Londons Rainbow Theatre. Tickets cost £1(a dollar fifty). The audience is treated to the first live performance of "The Dark Side of the Moon" a full year before its released as an album.
Brain Damage by Pink Floyd
The lunatic is on the grass.
The lunatic is on the grass.
Remembering games and daisy chains and laughs.
Got to keep the loonies on the path.
The lunatic is in the hall.
The lunatics are in my hall.
The paper holds their folded faces to the floor
And every day the paper boy brings more.
And if the dam breaks open many years too soon
And if there is no room upon the hill
And if your head explodes with dark forebodings too
I'll see you on the dark side of the moon.
The lunatic is in my head.
The lunatic is in my head
You raise the blade, you make the change
You re-arrange me 'til I'm sane.
You lock the door And throw away the key
There's someone in my head but it's not me.
And if the cloud bursts, thunder in your ear
You shout and no one seems to hear.
And if the band you're in starts playing different tunes
I'll see you on the dark side of the moon.