Yoko Ono writes:
Please join me not only in remembering John on October 9th but also in spreading the message of peace. This is something that was so important to John - the fact that we could all work together for the positive good of our planet. He would have loved how we are all mobilizing ourselves in thought and in action. It's time for action and the action is peace!
with love, yoko
Yoko Ono 9 Oct 2008
Here's a stamp of the Imagine Peace Tower in Iceland...
This site explains it... IMAGINEPEACE.COM.
And, of course, here's one of the most famous songs of all time