When asked how he'd like people to observe his birthday, Ringo said he'd like people to give each other the peace sign* and wish each other "peace and love."
So: peace and love.
(By the way, people seem to just nab celebrity pictures off the web wherever they find them. It took me a while to track down the guy who took the recent shot of Ringo, above. His name is Chris Hatcher and here's his website. I couldn't find the photographer who took the young Ringo picture. Anybody know?)
Mike*To make the peace sign, in case you don't know, you hold up your first two fingers in a "V" with the folded thumb and fingers facing forward. Like Ringo's doing in the top picture.