Pink Floyd is about to celebrate a milestone anniversary.

The band’s “The Dark Side of the Moon” album turns 40 on Sunday and to commemorate the occasion, the band is asking fans to tweet their favorite memories in its honor, the New York Times reports.

Starting at 8 p.m. on Saturday, Pink Floyd's official website will be live streaming the album in its entirety. Those tuning in to the groundbreaking 1973 album are asked to share photos, comments and memories using the hashtag #DarkSide40.

Storm Thorgerson, an English graphic designer who created the album’s original artwork, has produced a series of 14 new variations in honor of the album’s anniversary, according to Rolling Stone Magazine.

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This year, “Dark Side of the Moon” will be one of the 25 new recordings to be preserved by the U.S. Library of Congress. The album  stayed on the charts for 741 weeks and is considered one of the best-selling albums in history, according to Rolling Stone Magazine.