New York Times Co./Larry C. Morris/ Getty ImagesToday marks what would have been John Lennon‘s 77th birthday. Born in Liverpool, England, on October 9, 1940, the singer and songwriter went on to change the music world and the cultural landscape as a member of The Beatles and as a solo artist.

Lennon’s surviving Beatles band mates, Paul McCartney and Ringo Starr, both posted birthday messages to John on their social media sites, as did the late rock icon’s widow, Yoko Ono.

McCartney tweeted, “Reaching out to Johnny on his birthday. Love Paul x,” accompanied by a photo of him and Lennon in the recording studio.

Starr posted a message on his Twitter feed that reads, “They say it’s your birthday peace and love,” followed by a series of emojis including a hand flashing a peace sign, a star, a heart, some musical notes and a peace symbol. Ringo also included a snapshot of him and John that appears to be from about 1967.

Ono’s birthday message addressed both John and their son, Sean, who turns 42 today — they share a birthdasy. The tweet reads, “HAPPY BIRTHDAY JOHN AND SEAN! John, you are still with us and giving us wisdom and happiness when it’s much needed. i love you all, yoko.”

Yoko is in Reykjavik, Iceland, today for the annual lighting of the Imagine Peace Tower, a memorial art piece she conceived as a tribute to her late husband. The memorial, located on Videy Island, is a white stone monument that projects a light beam into the sky, and promotes the “imagine peace” message that Lennon championed during his life.

The lighting is scheduled for 5 p.m. ET, and the tower will remain lit until December 8, the anniversary of Lennon’s death. A live stream of the light tower can be seen at ImaginePeaceTower.com.

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