Year five of this challenge set up by 
1971 brought David Attenborough's greatest contribution to television (maybe): commissioning The Old Grey Whistle Test... 
Carole King - I Feel The Earth Move
Tapestry is one of those albums that was always around, and became taken for granted. Janet bought it as one of her first CDs when we met in Hong Kong and it was a re-introduction to some classic pop moments.
The Who - Baba O'Reilly
After Tommy and before Quadrophenia, was Lifehouse, wherein Pete Townshend invented the internet and socia media as a way for the yoof to rebel against the man. 25 years later the BBC commissioned a radio play and the Who's greatest album was shown to be the soundtrack of a miserable middle-age bloke looking for his daughter. Bit of a let-down, that. But it's their finest album and it starts with a synth loop, as you do when you're a guitar band.
Alice Cooper - Under My Wheels
A classic intro riff, and cheerfully dark humour. This is the period where Alice Cooper became a household name and could shock by reputation alone. The rest of the album isn't as good, but few things are. According to the liner notes on my CD, the snake's name was Kachina.
Grateful Dead - Wharf Rat
The album cover was known as Skull & Roses and became an iconic Dead image. The music reflected the band's recent shift towards country music (working with Crosby Stills & Nash in exchange for vocal coaching). This though, is beautiful hobo tale that I never tire of hearing. It made it's recorded début on this live album; a new policy for the band introduce because the studio albums had never reflected the concert experience.
David Bowie - Oh You Pretty Things
Prior to Ziggy Stardust, but heading space-wards, Hunky Dory is a transitional album, from the singer-songwriter to spaceman. The band is in place, the ambition is rising, but first we need peaens to Bob Dylan and Andy Warhol. This song, along with 'Changes' and 'Life on Mars' justify all the rest.
All the above videos are taken from YouTube, mostly courtesy of people who don't hold the rights.
The rules are to be interpreted as you like really, but are something like this:
Pick years from when you were born to now. It really doesn't have to be all of them
Feature some songs from one of those years in a post with some details about why you like them. You can write something about the year in general too.
Nominate another Steemian
Use the hashtag #x-daysofmusic