The estates of George Harrison and David Bowie posted rare footage in tribute to what would have been John Lennon’s 80th birthday last Friday, October 9th. The Harrison clip is 8-millimeter footageof George and John on a sailboat in 1964 during their “first proper holiday -- May 1964.” Bowie’s is a performance of Lennon’s “Imagine”in Hong Kong on December 8th, 1980 -- the third anniversary of Lennon’s death.