Whether you still love the album or not, listening to Pink Floyd's Dark Side of the Moon on headphones is a rite of passage. 

Now you can relive the glory days this Sunday as the band streams the album in full on PinkFloyd.com. To celebrate its 40th birthday, fans are encouraged to share photos and other memories of 'Dark Side' on Twitter using the hashtag #DarkSide40. 

Dark Side was Pink Floyd's first No. 1 album in the States and remained on the charts for 741 weeks between 1973 and 1988. The prism featured on the cover was originally designed by Storm Thorgerson, but on Sunday, 14 new variations will be unveiled on the site over time. 

[via The New York Times' Arts Beat]